Helical coil heat exchanger with removable end plates
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F28D-007/02
F28F-009/04
출원번호
US-0001639
(1997-12-31)
발명자
/ 주소
Manning Frank E.
Grace Ronald L.
출원인 / 주소
Flowserve Management Company
대리인 / 주소
Christie, Parker & Hale, LLP
인용정보
피인용 횟수 :
16인용 특허 :
7
초록▼
A heat exchanger for heat exchange between a working fluid and a coolant having an inner casing, an outer casing, and an annular space formed therebetween. A tube bundle including at least one tube formed into a helical coil is located within the annular space. End plates are removably secured and s
A heat exchanger for heat exchange between a working fluid and a coolant having an inner casing, an outer casing, and an annular space formed therebetween. A tube bundle including at least one tube formed into a helical coil is located within the annular space. End plates are removably secured and sealed to the ends of the outer casing. Bulkhead fittings are mounted in openings of the end plates to seal the tube ends which pass through the end plates. The bulkhead fittings are sized to permit the end plates to be moved off of the bulkhead fittings in a direction away from the helical coil. The tube bundle may also include a separating plate extending longitudinally between the coils of two tubes within the tube bundle creating two separate passages through which coolant may flow. External tubes may be connected at the tube ends, outside of the outer casing and the end plates, such that the working fluid flows in a parallel single-pass flow or a series double-pass flow through the annular space. A method for servicing the heat exchanger includes disconnecting the heat exchanger from a fluid delivery tube and a fluid return tube, removing the end plates off of the bulkhead fittings in a direction away from the helical coil, removing the inner and outer casings off of the tube bundle, and servicing the tube bundle.
대표청구항▼
[ We claim:] [1.] A heat exchanger for heat exchange between a working fluid and a coolant, the heat exchanger comprising:an inner casing;an outer casing around the inner casing forming an annular space therebetween, the outer casing having a first end and a second end;a tube bundle including a firs
[ We claim:] [1.] A heat exchanger for heat exchange between a working fluid and a coolant, the heat exchanger comprising:an inner casing;an outer casing around the inner casing forming an annular space therebetween, the outer casing having a first end and a second end;a tube bundle including a first tube through which one of said working fluid and coolant flows, the first tube having a first end, a second end and a helical coil formed between the first and second ends of the first tube, wherein the helical coil is located in the annular space between the inner and outer casings;a first end plate removably secured and sealed to the first end of the outer casing, the first end plate having an opening through which the first end of the first tube passes;a second end plate removably secured and sealed to the second end of the outer casing, the second end plate having an opening through which the second end of the first tube passes;a first bulkhead fitting detachably mounted in the opening of the first end plate, the first bulkhead fitting sealed to the first end of the first tube passing therethrough; anda second bulkhead fitting detachably mounted in the opening of the second end plate, the second bulkhead fitting sealed to the second end of the first tube passing therethrough;wherein the first and second bulkhead fittings are sized to permit the first and second end plates, respectively, to be moved off of the respective bulkhead fittings in a direction away from the helical coil. [12.] A heat exchanger for heat exchange between a working fluid and a coolant, the heat exchanger comprising:an inner casing;an outer casing around the inner casing forming an annular space therebetween; the outer casing having a first end and a second end;a tube bundle including a plurality of tubes through which one of said working fluid and coolant flows, each of the plurality of tubes having a first end, a second end and a helical coil formed between the first and second ends, wherein the helical coils of the plurality of tubes are located in the annular space between the inner and outer casings and the helical coil of a first one of the plurality of tubes is spaced from and located radially inside the helical coil of a second one of the plurality of tubes;a first end plate removably secured and sealed to the first end of the outer casing, the first end plate having a plurality of openings through which the first ends of the plurality of tubes pass, respectively;a second end plate removably secured and sealed to the second end of the outer casing, the second end plate having a plurality of openings through which the second ends of the plurality of tubes pass, respectively; anda separating plate extending longitudinally and located between the helical coil of the first one of the plurality of tubes and the helical coil of the second one of the plurality of tubes such that the other of said working fluid and coolant flows through two separate passages, a first one of the separate passages between the inner casing and the separating plate and a second one of the separate passages between the outer casing and the separating plate. The heat exchanger of claim 12, wherein the tube bundle is sandwiched between the inner and outer casings such that the flow of substantially all of the other of said working fluid and coolant is restricted to a helical flow between the helical coils of the plurality of tubes. The heat exchanger of claim 12, further comprising:a first plurality of bulkhead fittings detachably mounted in the plurality of openings, respectively, of the first end plate, each of the first plurality of bulkhead fittings sealed to a respective first end of one of the plurality of tubes passing therethrough; anda second plurality of bulkhead fittings detachably mounted in the plurality of openings, respectively, of the second end plate, each of the second plurality of bulkhead fittings sealed to a respective second end of one of the plurality of tubes passing therethrough;wherein the first and second plurality of bulkhead fittings are sized to permit the first and second end plates, respectively, to be moved off of the respective bulkhead fittings in a direction away from the helical coils. The heat exchanger of claim 14, wherein the first end plate has a port for permitting the other of said working fluid and coolant to enter the annular space and wherein the second end plate has a port for permitting the other of said working fluid and coolant to exit the annular space. The heat exchanger of claim 15, wherein the tube bundle further comprises:an inner baffle located radially inside the helical coil of the first one of the plurality of tubes such that the first one of the separate passages is between the inner baffle and the separating plate; andan outer baffle located around the helical coil of the second one of the plurality of tubes such that the second one of the separate passages is between the outer baffle and the separating plate. The heat exchanger of claim 12, further comprising a first external tube connecting the first end of the first one of the plurality of tubes to the first end of the second one of the plurality of tubes such that the flow of the one of said working fluid and the coolant is split between the helical coils of the first one and the second one of the plurality of tubes resulting in a parallel, single-pass flow through the annular space, wherein the first external tube connections are outside the outer casing and the first and second end plates. The heat exchanger of claim 17, further comprising a second external tube connecting the second end of the first one of the plurality of tubesto the second end of the second one of the plurality of tubes such that the flow from the helical coils of the first one and the second one of the plurality of tubes is combined, wherein the second external tube connections are outside the outer casing and the first and second end plates. The heat exchanger of claim 12, further comprising an external tube connecting the second end of the first one of the plurality of tubes to the second end of the second one of the plurality of tubes such that the flow from one of the helical coils of the first one and the second one of the plurality of tubes is directed to the other of the helical coils of the first one and the second one of the plurality of tubes in a series, double-pass flow through the annular space. [20.] A heat exchanger for heat exchange between a working fluid from a working fluid source and a coolant, the heat exchanger comprising:an inner casing;an outer casing around the inner casing forming an annular space therebetween, the outer casing having a first end and a second end;a tube bundle including a plurality of tubes through which the working fluid is permitted to flow, each of the plurality of tubes having a first end, a second end and a helical coil formed between the first and second ends, wherein the helical coils of the plurality of tubes are located in the annular space between the inner and outer casings and the helical coil of a first one of the plurality of tubes is spaced from and located radially inside the helical coil of a second one of the plurality of tubes;a first end plate sealed to the first end of the outer casing, the first end plate having a plurality of openings through which the first ends of the plurality of tubes pass, respectively;a second end plate sealed to the second end of the outer casing, the second end plate having a plurality of openings through which the second ends of the plurality of tubes pass, respectively;a fluid delivery tube for receiving working fluid from the working fluid source connected to the first end of one of the first one and the second one of the plurality of tubes;an external outlet tube connecting the second end of the first one of the plurality of tubes to the second end of the second one of the plurality of tubes such that the external tube receives the working fluid after the working fluid has passed through the annular space; anda fluid return tube for returning working fluid to the working fluid source after the working fluid has passed through the annular space.
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이 특허에 인용된 특허 (7)
Molitor Victor D. (Denver CO), Coiled heat exchanger.
DiMeo, Andrew J.; Cox, Nathan M.; Grove, Steven P.; Lee, Samuel; Oltmans, Luke D.; Sauer, Kathryn H., Rapid fluid cooling devices and methods for cooling fluids.
DiMeo, Andrew J.; Cox, Nathan M.; Grove, Steven P.; Lee, Samuel; Oltmans, Luke D.; Sauer, Kathryn H., Rapid fluid cooling devices and methods for cooling fluids.
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