Thermodynamic systems operating with near-isothermal compression and expansion cycles
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-023/00
출원번호
US-0466995
(2006-08-24)
등록번호
US-7401475
(2008-07-22)
발명자
/ 주소
Hugenroth,Jason J.
Braun,James E.
Groll,Eckhard A.
King,Galen B.
출원인 / 주소
Purdue Research Foundation
대리인 / 주소
Hartman & Hartman, P.C.
인용정보
피인용 횟수 :
20인용 특허 :
6
초록▼
A thermodynamic system that can approximate the Ericsson or Brayton cycles and operated in reverse or forward modes to implement a cooler or engine, respectively. The thermodynamic system includes a device for compressing a first fluid stream containing a first gas-liquid mixture having a sufficient
A thermodynamic system that can approximate the Ericsson or Brayton cycles and operated in reverse or forward modes to implement a cooler or engine, respectively. The thermodynamic system includes a device for compressing a first fluid stream containing a first gas-liquid mixture having a sufficient liquid content so that compression of the gas within the first gas-liquid mixture by the compressing device is nearly isothermal, and a device for expanding a second fluid stream containing a second gas-liquid mixture having a sufficient liquid content so that expansion of the gas within the second gas-liquid mixture by the expanding device is nearly isothermal. A heat sink is in thermal communication with at least the liquid of the first gas-liquid mixture for transferring heat therefrom, and a heat source is in thermal communication with at least the liquid of the second gas-liquid mixture for transferring heat thereto. A device is provided for transferring heat between at least the gas of the first gas-liquid mixture after the first fluid stream exits the compressing device and at least the gas of the second gas-liquid mixture after the second fluid stream exits the expanding device. The compressing and expanding devices are not liquid-ring compressors or expanders, but instead are devices that tolerate liquid flooding, such as scroll-type compressors and expanders.
대표청구항▼
The invention claimed is: 1. A thermodynamic system comprising: means for compressing a first fluid stream containing a first gas-liquid mixture having a sufficient liquid content so that compression of the gas within the first gas-liquid mixture by the compressing means is nearly isothermal; means
The invention claimed is: 1. A thermodynamic system comprising: means for compressing a first fluid stream containing a first gas-liquid mixture having a sufficient liquid content so that compression of the gas within the first gas-liquid mixture by the compressing means is nearly isothermal; means for expanding a second fluid stream containing a second gas-liquid mixture having a sufficient liquid content so that expansion of the gas within the second gas-liquid mixture by the expanding means is nearly isothermal; a heat sink in thermal communication with at least the liquid of the first gas-liquid mixture for transferring heat therefrom; a heat source in thermal communication with at least the liquid of the second gas-liquid mixture for transferring heat thereto; means for transferring heat between at least the gas of the first gas-liquid mixture after the first fluid stream exits the compressing means and at least the gas of the second gas-liquid mixture after the second fluid stream exits the expanding means; wherein the compressing means is not a liquid-ring compressor and the expanding means is not a liquid-ring expander. 2. The thermodynamic system of claim 1, wherein the gases of the first and second gas-liquid mixtures are the same and flow in the same gas circuit within the thermodynamic system, and the liquids of the first and second gas-liquid mixtures are in separate liquid circuits within the thermodynamic system. 3. The thermodynamic system of claim 1, further comprising: first means for separating the gas and the liquid of the first gas-liquid mixture downstream of the compressing means so that only the liquid of the first gas-liquid mixture passes through the heat sink; and second means for separating the gas and the liquid of the second gas-liquid mixture downstream of the expanding means so that only the liquid of the second gas-liquid mixture passes through the heat source; wherein the transferring means transfers heat between only the gas of the first gas-liquid mixture after the first fluid stream exits the first separating means and only the gas of the second gas-liquid mixture after the second fluid stream exits the second separating means. 4. The thermodynamic system of claim 3, further comprising means for reducing the pressure of the liquid separated from the first gas-liquid mixture, and means for increasing the pressure of the liquid separated from the second gas-liquid stream. 5. The thermodynamic system of claim 3, further comprising means for equaling the liquid contents of the first and second gas-liquid mixtures. 6. The thermodynamic system of claim 3, wherein the thermodynamic system is a heat pump operating as a reverse Ericsson cycle, the heat source is at a lower temperature than the heat sink, and the transferring means transfers heat from the gas of the first gas-liquid mixture to the gas of the second gas-liquid mixture. 7. The thermodynamic system of claim 6, wherein the heat sink is downstream of the first separating means and the heat source is downstream of the second separating means. 8. The thermodynamic system of claim 6, wherein the heat sink is between the compressing means and the first separating means and the heat source is between the expanding means and the second separating means. 9. The thermodynamic system of claim 3, wherein the thermodynamic system is a heat engine operating as a forward Ericsson cycle, the heat source is at a higher temperature than the heat sink, and the transferring means transfers heat from the gas of the second gas-liquid mixture to the gas of the first gas-liquid mixture. 10. The thermodynamic system of claim 1, wherein the gases of the first and second gas-liquid mixtures are the same and flow in the same gas circuit within the thermodynamic system, and the liquids of the first and second gas-liquid mixtures are the same and flow in the same liquid circuit within the thermodynamic system. 11. The thermodynamic system of claim 10, further comprising: first means for separating the gas and the liquid of the first gas-liquid mixture downstream of the compressing means so that only the liquid of the first gas-liquid mixture passes through the heat sink; and second means for separating the gas and the liquid of the second gas-liquid mixture downstream of the expanding means so that only the liquid of the second gas-liquid mixture passes through the heat source; wherein the transferring means transfers heat between only the gas of the first gas-liquid mixture after exiting the first separating means and only the gas of the second gas-liquid mixture after exiting the second separating means. 12. The thermodynamic system of claim 11, wherein the thermodynamic system is a heat pump operating as a reverse Ericsson cycle, the heat source is at a lower temperature than the heat sink, and the transferring means transfers heat from the gas of the first gas-liquid mixture to the gas of the second gas-liquid mixture. 13. The thermodynamic system of claim 11, wherein the heat sink is downstream of the first separating means and the heat source is downstream of the second separating means. 14. The thermodynamic system of claim 11, further comprising means for transferring heat from the liquid of the first gas-liquid mixture after exiting the heat sink to the liquid of the second gas-liquid mixture after exiting the heat source. 15. The thermodynamic system of claim 1, wherein the gases of the first and second gas-liquid mixtures are the same, the liquids of the first and second gas-liquid mixtures are the same, and the first and second fluid streams intermix within the thermodynamic system. 16. The thermodynamic system of claim 15, wherein the thermodynamic system operates as a reverse Brayton cycle, the heat source is at a lower temperature than the heat sink, and the transferring means transfers heat from the gas and the liquid of the first gas-liquid mixture after exiting the compressing means to the gas and the liquid of the second gas-liquid mixture after exiting the expanding means. 17. The thermodynamic system of claim 15, wherein the thermodynamic system operates as a forward Brayton cycle, the heat source is at a higher temperature than the heat sink, and the transferring means transfers heat from the gas and the liquid of the second gas-liquid mixture after exiting the expanding means to the gas and the liquid of the first gas-liquid mixture after exiting the compressing means. 18. The thermodynamic system of claim 15, further comprising means for separating a portion of the liquid of the first gas-liquid mixture downstream of the heat sink, the portion of the liquid flowing through throttling means before being returned to the compressing means. 19. The thermodynamic system of claim 1, wherein the compressing means comprises a scroll compressor. 20. The thermodynamic system of claim 1, wherein the expanding means comprises a scroll expander.
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Fong, Danielle A.; Crane, Stephen E.; Berlin, Jr., Edwin P.; Pourmousa Abkenar, AmirHossein; Mahalatkar, Kartikeya; Hou, Yongxi; Bowers, Todd; Stahlkopf, Karl E., Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange.
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Frazier, Scott R.; Tandler, John; Fitzgerald, Jacob; Lau, Alexander; Von Herzen, Brian, Rotary compressor-expander systems and associated methods of use and manufacture.
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Frazier, Scott R.; Lau, Alex; Von Herzen, Brian, Semi-isothermal compression engines with separate combustors and expanders, and associated systems and methods.
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