IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0767275
(2010-04-26)
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등록번호 |
US-8116920
(2012-02-14)
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발명자
/ 주소 |
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출원인 / 주소 |
- Saudi Arabian Oil Company
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대리인 / 주소 |
Bracewell & Giuliani, LLP
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인용정보 |
피인용 횟수 :
7 인용 특허 :
10 |
초록
▼
Systems, methods, and program product to synthesize a grass-roots heat exchanger network for non-thermodynamically constrained problems for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, are provided
Systems, methods, and program product to synthesize a grass-roots heat exchanger network for non-thermodynamically constrained problems for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, are provided. An exemplary system includes a heat exchange network synthesizing computer and heat exchange network synthesizing program product configured to analyze the waste heat recovery problem without decomposition to produce a result having an optimal number of network heat exchanger units through application of advanced process-to-process matching schemes for non-thermodynamically constrained problems.
대표청구항
▼
1. A system to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the system comprising: a heat exchange network synthesizing computer having a process
1. A system to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the system comprising: a heat exchange network synthesizing computer having a processor and memory in communication with the processor to store software and database records therein;at least one database stored in memory accessible to the energy modeling computer, comprising: a plurality of sets of values each separately defining a potential range of values for a corresponding plurality of operational attributes for each of a plurality of hot resource streams,a plurality of sets of values each separately defining a potential range of values for a corresponding plurality of operational attributes for each of a plurality of cold resource streams,indicia of stream initial types for each of a plurality of hot process streams and for each of a plurality of cold process streams, andindicia of one or more non-thermodynamically constrained hot process streams of the plurality of hot process streams each constrained from matching at least one of the plurality of cold process streams to define one or more forbidden matches;heat exchange network synthesizing program product stored in the memory of the exchange network synthesizing computer to synthesize a grass-roots heat exchanger network for the plurality of hot process streams to be cooled and the plurality of cold process streams to be heated, the program product including instructions that when executed by the heat exchange network synthesizing computer cause the computer to perform the operations of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of the plurality of hot process streams and for each of the plurality of cold process streams,receiving indicia of at least one minimum temperature approach value for each of the plurality of the hot process streams, the indicia of at least one minimum temperature approach value for each of the plurality of hot process streams comprising indicia of one or more of the following: a plurality of discrete stream-specific minimum temperature approach values each separately assigned to a different one of the plurality of hot process streams, at least one of the stream-specific minimum temperature approach values assigned to a corresponding at least one of the plurality of hot process streams being different from at least one other of the plurality of stream-specific minimum temperature approach values assigned to a corresponding at least one other of the plurality of hot process streams,a plurality of sets of at least two stream-specific minimum temperature approach values defining a range of stream-specific minimum temperature approach values, each of the plurality of sets of at least two stream-specific minimum temperature approach values separately assigned to a different one of the plurality of hot process streams, anda plurality of sets of dual stream minimum temperature approach values each separately assigned to a different one of the plurality of hot process streams, receiving indicia of one or more non-thermodynamic streams matching constraints,matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising one or more of the following operations: employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, andemploying streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements,determining an initial heat exchanger network design responsive to the operation of matching the plurality of hot process streams and the plurality of cold process streams,removing any redundant process-to-process heat exchangers from the initial design when so existing responsive to the operation of determining an initial heat exchanger network design,merging same-stream utility heat exchangers when two or more same-stream utility heat exchangers exist responsive to the operation of determining an initial heat exchanger network design, andproviding a final heat exchanger network design responsive to one or more of the following operations: the determining of an initial heat exchanger network design, the removing of any redundant process to process heat exchangers from the initial design when so existing, and the merging of the two or more same-stream utility heat exchangers when so existing. 2. A system as defined in claim 1, wherein the program product further includes instructions that when executed by the heat exchange network synthesizing computer cause the computer to further perform the operation of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams;wherein the matching scheme comprises the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing homogeneous matching comprises performing one or more of the following operations: converting a pair of stream types of a pair of the plurality of hot process streams from being heterogeneous with mono-matching capability to being homogeneous with bi-matching capability, andconverting a pair of stream types of a pair of the plurality of cold process streams from being heterogeneous with mono-matching capability to being homogeneous with bi-matching capability. 3. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing homogeneous matching comprises the operation of: matching one of the plurality of cold process streams identified as having a forbidden match constraint with one of the plurality of hot process streams, with one or more other of the plurality of cold process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint. 4. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing homogeneous matching comprises the operation of: matching one of the plurality of hot process streams identified as having a forbidden match constraint with one of the plurality of cold process streams, with one or more other of the plurality of hot process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint. 5. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing streams designation switching includes the operation of: switching a stream attribute of a selected one of the process streams from a desired value to an alternate value to provide the respective stream an added heating or cooling capability respectively for processing and returning the stream attribute to the desired value through treatment of the respective stream as having an opposite designation, to thereby account for one or more non-thermodynamic stream matching constraints. 6. A system as defined in claim 5, wherein the selected one of the process streams is a selected specific hot process stream of the plurality of hot process streams having a desired target temperature, and wherein the operation of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the operations of: designating the selected specific hot process stream to be cooled below the desired target temperature through process-to-process heat exchange; anddesignating the selected specific hot process stream to be heated back to the desired target temperature through process-to-process heat exchange, to include the following operations: identifying at least a portion of the specific hot process stream to function as a cold process stream responsive to designating the specific hot process stream to be cooled below the desired target temperature, andmatching the at least a portion of the specific hot process stream with a selected at least one process stream to be cooled responsive to the operation of identifying, to thereby cool the selected at least one process stream to be cooled and to thereby heat the selected specific hot process stream back to the desired target temperature. 7. A system as defined in claim 5, wherein the selected one of the process streams is a selected specific cold process stream of the plurality of cold process streams having a desired target temperature, and wherein the operation of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the operations of: designating the selected specific cold process stream to be heated above the desired target temperature through process-to-process heat exchange; anddesignating the selected specific cold process stream to be cooled back to the desired target temperature through process-to-process heat exchange, to include the following operations: identifying at least a portion of the specific cold process stream to function as a hot process stream responsive to designating the specific cold a process stream to be heated above the desired target temperature, andmatching the at least a portion of the specific cold process stream with a selected at least one process stream to be heated responsive to the operation of identifying, to thereby heat the selected at least one process stream to be heated and to thereby cool the selected specific cold process stream back to the desired target temperature. 8. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing streams designation switching includes the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and for each of the plurality of cold process streams,designating a specific stream to be cooled to a desired target temperature through process-to-process heat exchange as one of the plurality of hot process streams, andidentifying a portion of the specific stream to be cooled through process-to-process heat exchange that was designated as one of the plurality of hot process streams, as a cold process stream to be heated through process-to-process heat exchange to match with another one of the plurality of hot process streams, to thereby account for the one or more non-thermodynamic stream matching constraints. 9. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing streams designation switching to account for one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing streams designation switching includes the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams,designating a specific stream to be heated to a desired target temperature through process-to-process heat exchange as one of the plurality of cold process streams, andidentifying a portion of the specific stream to be heated through process-to-process heat exchange that was designated as one of the plurality of cold process streams, as a hot process stream to be cooled through process-to-process heat exchange to match with another one of the plurality of cold process streams, to thereby account for the one or more non-thermodynamic stream matching constraints. 10. A system as defined in claim 1, wherein the matching scheme comprises the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; andwherein the operation of employing streams designation switching includes one or more of the following operations: switching a stream target temperature of a selected process stream from a desired target temperature value to an alternate target temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative target temperature value that at least partially offsets an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the desired target temperature value, andswitching a stream supply temperature of a selected process stream from an actual supply temperature value to an alternate supply temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative supply temperature value that at least partially offset an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the actual supply temperature value. 11. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams;matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing homogeneous matching comprising performing one or more of the following operations: converting a pair of stream types of a pair of the plurality of hot process streams from being heterogeneous with mono-matching capability to being homogeneous and having bi-matching capability, andconverting a pair of stream types of a pair of the plurality of cold process streams from being heterogeneous with mono-matching capability to being homogeneous and having bi-matching capability; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 12. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams;matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing homogeneous matching comprising the operation of: matching one of the plurality of cold process streams identified as having a forbidden match constraint with one of the plurality of hot process streams, with one or more other of the plurality of cold process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 13. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing homogeneous matching comprising the operation of matching one of the plurality of hot process streams identified as having a forbidden match constraint with one of the plurality of cold process streams, with one or more other of the plurality of hot process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 14. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing streams designation switching including the operation of switching a stream attribute of a selected one of the process streams from a desired value to an alternate value to provide the respective stream an added heating or cooling capability respectively for process-to-process heat exchange processing and returning the stream attribute to the desired value through treatment of the respective stream as having an opposite designation, to thereby account for the one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 15. Program product as defined in claim 14, wherein the selected one of the process streams is a selected specific hot process stream of the plurality of hot process streams having a desired target temperature, and wherein the operation of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the operations of: designating the selected specific hot process stream to be cooled below the desired target temperature through process-to-process heat exchange; anddesignating the selected specific hot process stream to be heated back to the desired target temperature through process-to-process heat exchange, to include the following operations: identifying at least a portion of the specific hot process stream to function as a cold process stream responsive to designating the specific hot process stream to be cooled below the desired target temperature, andmatching the at least a portion of the specific hot process stream with a selected at least one process stream to be cooled responsive to the operation of identifying, to thereby cool the selected at least one process stream to be cooled and to thereby heat the selected specific hot process stream back to the desired target temperature. 16. Program product as defined in claim 14, wherein the selected one of the process streams is a selected specific cold process stream of the plurality of cold process streams having a desired target temperature, and wherein the operation of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the operations of: designating the selected specific cold process stream to be heated above the desired target temperature through process-to-process heat exchange; anddesignating the selected specific cold process stream to be cooled back to the desired target temperature through process-to-process heat exchange, to include the following operations: identifying at least a portion of the specific cold process stream to function as a hot process stream responsive to designating the specific cold a process stream to be heated above the desired target temperature, andmatching the at least a portion of the specific cold process stream with a selected at least one process stream to be heated responsive to the operation of identifying, to thereby heat the selected at least one process stream to be heated and to thereby cool the selected specific cold process stream back to the desired target temperature. 17. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing streams designation switching including the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and for each of the plurality of cold process streams,designating a specific stream to be cooled to a desired target temperature through process-to-process heat exchange as one of the plurality of hot process streams, andidentifying a portion of the specific stream to be cooled through process-to-process heat exchange that was designated as one of the plurality of hot process streams, as a cold process stream to be heated through process-to-process heat exchange to match with another one of the plurality of hot process streams, to thereby account for the one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 18. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing streams designation switching to account for one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing streams designation switching including the operations of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams,designating a specific stream to be heated to a desired target temperature through process-to-process heat exchange as one of the plurality of cold process streams, andidentifying a portion of the specific stream to be heated through process-to-process heat exchange that was designated as one of the plurality of cold process streams, as a hot process stream to be cooled through process-to-process heat exchange to match with another one of the plurality of cold process streams for cooling, to thereby account for the one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 19. Heat exchange network synthesizing program product to synthesize a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of: matching the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the operation of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the operation of employing streams designation switching including one or more of the following operations: switching a stream target temperature of a selected process stream from a desired target temperature value to an alternate target temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative target temperature value that at least partially offsets an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the desired target temperature value, andswitching a stream supply temperature of a selected process stream from an actual supply temperature value to an alternate supply temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative supply temperature value that at least partially offsets an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the actual supply temperature value; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 20. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing homogeneous matching comprising performing one or more of the following steps: converting a pair of stream types of a pair of the plurality of hot process streams from being heterogeneous with mono-matching capability to being homogeneous with bi-matching capability, andconverting a pair of stream types of a pair of the plurality of cold process streams from being heterogeneous with mono-matching capability to being homogeneous with bi-matching capability; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 21. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing homogeneous matching comprising the step of: matching one of the plurality of cold process streams identified as having a forbidden match constraint with one of the plurality of hot process streams, with one or more other of the plurality of cold process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint; anddetermining a heat exchanger network design responsive to the step, of matching the plurality of hot process streams and the plurality of cold process streams. 22. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing homogeneous matching comprising the step of: matching one of the plurality of hot process streams identified as having a forbidden match constraint with one of the plurality of cold process streams, with one or more other of the plurality of hot process streams responsive to the forbidden match constraint to thereby indirectly match the respective one of the plurality of hot process streams with the respective one of the plurality of cold process streams subject to the forbidden match constraint; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 23. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing streams designation switching includes including the step of: switching a stream attribute of a selected one of the process streams from a desired value to an alternate value to provide the respective stream an added heating or cooling capability respectively for process-to-process heat exchange processing and returning the stream attribute to the desired value through treatment of the respective stream as having an opposite designation, to thereby account for one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 24. A method as defined in claim 23, wherein the selected one of the process streams is a selected specific hot process stream of the plurality of hot process streams having a desired target temperature, and wherein the step of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the steps of: designating the selected specific hot process stream to be cooled below the desired target temperature through process-to-process heat exchange; anddesignating the selected specific hot process stream to be heated back to the desired target temperature through process-to-process heat exchange, to include the following steps: identifying at least a portion of the specific hot process stream to function as a cold process stream responsive to designating the specific hot process stream to be cooled below the desired target temperature, andmatching the at least a portion of the specific hot process stream with a selected at least one process stream to be cooled responsive to the step of identifying, to thereby coolthe selected at least one process stream to be cooled and to thereby heat the selected specific hot process stream back to the desired target temperature. 25. A method as defined in claim 23, wherein the selected one of the process streams is a selected specific cold process stream of the plurality of cold process streams having a desired target temperature, and wherein the step of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the steps of: designating the selected specific cold process stream to be heated above the desired target temperature through process-to-process heat exchange; anddesignating the selected specific cold process stream to be cooled back to the desired target temperature through process-to-process heat exchange, to include the following steps: identifying at least a portion of the specific cold process stream to function as a hot process stream responsive to designating the specific cold a process stream to be heated above the desired target temperature, andmatching the at least a portion of the specific cold process stream with a selected at least one process stream to be heated responsive to the step of identifying, to thereby heat the selected at least one process stream to be heated and to thereby cool the selected specific cold process stream back to the desired target temperature. 26. A method as defined in claim 23, wherein the selected one of the process streams is a selected specific hot process stream of the plurality of hot process streams having an initial supply temperature, and wherein the step of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the steps of: designating the selected specific hot process stream to be heated above the initial supply temperature through process-to-process heat exchange; anddesignating the selected specific hot process stream to be cooled back to at least the initial supply temperature through process-to-process heat exchange. 27. A method as defined in claim 23, wherein the selected one of the process streams is a selected specific cold process stream of the plurality of cold process streams having an initial supply temperature, and wherein the step of switching a stream attribute of a selected one of the process streams and returning the stream attribute to the desired value comprises the steps of: designating the selected specific cold process stream to be cooled below the initial supply temperature through process-to-process heat exchange; anddesignating the selected cold process stream to be heated back to at least the desired initial supply temperature through process-to-process heat exchange. 28. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing streams designation switching including the steps of: receiving indicia of stream initial types for each of the plurality of hot process streams and for each of the plurality of cold process streams,designating a specific stream to be cooled to a desired target temperature through process-to-process heat exchange as one of the plurality of hot process streams, andidentifying a portion of the specific stream to be cooled through process-to-process heat exchange that was designated as one of the plurality of hot process streams as a cold process stream to be heated through process-to-process heat exchange to match with another one of the plurality of hot process streams, to thereby account for the one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 29. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing streams designation switching to account for one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, the step of employing streams designation switching including the steps of: receiving indicia of stream initial types for each of the plurality of hot process streams and each of the plurality of cold process streams,designating a specific stream to be heated to a desired target temperature through process-to-process heat exchange as one of the plurality of cold process streams, andidentifying a portion of the specific stream to be heated through process-to-process heat exchange that was designated as one of the plurality of cold process streams as a hot process stream to be cooled through process-to-process heat exchange to match with another one of the plurality of cold process streams, to thereby account for the one or more non-thermodynamic stream matching constraints; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 30. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising the step of employing streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; the step of employing streams designation switching including one or more of the following steps: switching a stream target temperature of a selected process stream from a desired target temperature value to an alternate target temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative target temperature value that at least partially offsets an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the desired target temperature value, andswitching a stream supply temperature of a selected process stream from an actual supply temperature value to an alternate supply temperature value to provide the respective stream an added heating or cooling capability respectively for processing to achieve one or more utility optimization objectives directly affected by application of the alternative supply temperature value that at least partially offsets an inefficiency resulting from the one or more non-thermodynamic stream matching constraints and returning the temperature value of the selected process stream to the actual supply temperature value; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 31. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising one or more of the following steps: employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, andemploying streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; the matching scheme further comprising the steps of:analyzing a potential reduction in one or more utility consumption requirements, employment feasibility, and capital cost related to employing one or more buffers between one or more pairs of process streams to account for the one or more non-thermodynamic stream matching constraints to thereby determine if employment of the one or more buffers would provide an improvement over employment of one or more of the following matching schemes: the homogeneous matching and the streams designation switching defining one or more advanced consumption reduction methods, andemploying one or more buffers between the one or more of the process streams responsive to determining that the employment of the one or more buffers provides one or more utility consumption reductions over that provided by the one or more advanced consumption reduction methods; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 32. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;receiving indicia of at least one minimum temperature approach value for each of the plurality of hot process streams, the indicia of at least one minimum temperature approach value for each of the plurality of hot process streams comprising indicia of one or more of the following: a plurality of discrete stream-specific minimum temperature approach values each separately assigned to a different one of the plurality of hot process streams, at least one of the stream-specific minimum temperature approach values assigned to a corresponding at least one of the plurality of hot process streams being different from at least one other of the plurality of stream-specific minimum temperature approach values assigned to a corresponding at least one other of the plurality of hot process streams,a plurality of sets of at least two stream-specific minimum temperature approach values defining a range of stream-specific minimum temperature approach values, each of the plurality of sets of at least two stream-specific minimum temperature approach values separately assigned to a different one of the plurality of hot process streams, anda plurality of sets of dual stream minimum temperature approach values each separately assigned to a different one of the plurality of hot process streams;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising one or more of the following steps: employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, andemploying streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements,the step of matching the plurality of hot process streams and the plurality of cold process streams further comprising the step of accounting for the at least one minimum temperature approach value for each of the plurality of hot process streams; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams. 33. A method of synthesizing a grass-roots heat exchanger network for a plurality of hot process streams to be cooled and a plurality of cold process streams to be heated according to a plurality of utilities targets, the method comprising the steps of: receiving a plurality of operational attributes including a heat capacity flow rate, a supply temperature, and a desired target temperature for each of a plurality of hot process streams and for each of a plurality of cold process streams;receiving indicia of one or more non-thermodynamic streams matching constraints;matching by a computer the plurality of hot process streams and the plurality of cold process streams to attain one or more utilities energy consumption targets according to a matching scheme comprising one or more of the following steps: employing homogeneous matching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements, andemploying streams designation switching to account for the one or more non-thermodynamic stream matching constraints to thereby reduce one or more utility consumption requirements; anddetermining a heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams, the step of determining a heat exchanger network design comprising the steps of: determining an initial heat exchanger network design responsive to the step of matching the plurality of hot process streams and the plurality of cold process streams,removing any redundant process-to-process heat exchangers from the initial design when so existing responsive to the step of determining the initial heat exchanger network design,merging same-stream utility heat exchangers when two or more same-stream utility heat exchangers exist, responsive to the step of determining the initial heat exchanger network design, andproviding a final heat exchanger network design responsive to one or more of the following steps: the determining of an initial heat exchanger network design, the removing of any redundant process to process heat exchangers from the initial design when so existing, and the merging of the two or more same-stream utility heat exchangers when so existing.
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