IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0984800
(2007-11-21)
|
등록번호 |
US-7818978
(2010-11-15)
|
우선권정보 |
FR-06 10507(2006-12-01) |
발명자
/ 주소 |
- Ducoulombier, Maxime
- Colasson, Stéphane
|
출원인 / 주소 |
- Commissariat à l'Energie Atomique
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
1 |
초록
▼
A vapour compression device including an internal heat exchanger, a low-pressure compressor and an associated gas cooler, a fluid distributor separating the fluid into a main circuit of the cycle and into an auxiliary cooling circuit of the cycle, an auxiliary expansion system placed on the auxiliar
A vapour compression device including an internal heat exchanger, a low-pressure compressor and an associated gas cooler, a fluid distributor separating the fluid into a main circuit of the cycle and into an auxiliary cooling circuit of the cycle, an auxiliary expansion system placed on the auxiliary cooling circuit, and a main expansion system placed on the main circuit of the cycle. The device also includes a high-pressure compressor and an associated gas cooler placed on the main circuit of the cycle. A method for performing a transcritical fluid cycle including a substantially isentropic compression step of the fluid, on the main circuit of the cycle, to reach a maximum high pressure greater than a critical pressure of the fluid, and an isobaric cooling step of the fluid to substantially reach a cold source temperature.
대표청구항
▼
We claim: 1. A vapour compression device for a transcritical fluid cycle comprising at least: an internal heat exchanger, a first vapour compression system connection to an outlet of the internal heat exchanger, a first isobaric cooling system —having an inlet and an outlet and being—
We claim: 1. A vapour compression device for a transcritical fluid cycle comprising at least: an internal heat exchanger, a first vapour compression system connection to an outlet of the internal heat exchanger, a first isobaric cooling system —having an inlet and an outlet and being—connected to an outlet of the first vapor compression system, a fluid distributor placed at —the—outlet of the first isobaric cooling system that separates the fluid into a main circuit of the cycle and an auxiliary cooling circuit of the cycle, an auxiliary expansion system placed on the auxiliary cooling circuit between the fluid distributor and an inlet of the internal heat exchanger, a main expansion system placed on the main circuit and connected to the outlet of the internal heat exchanger, an evaporator operating at low pressure placed between an outlet of the main expansion system and the inlet of the internal heat exchanger, a second vapour compression system, and a second isobaric cooling system connected to an outlet of the second vapour compression system, wherein the second vapour compression system and the second isobaric cooing system are placed on the main circuit of the cycle after the fluid distributor and before the inlet of the internal heat exchanger, and the fluid separated into the auxiliary cooling circuit by the fluid distributor flows serially from the fluid distributor through the auxiliary expansion system and into the internal heat exchanger. 2. The device according to claim 1, wherein the fluid is carbon dioxide. 3. The device according to claim 1, wherein the isobaric cooling systems are gas coolers. 4. The device according to claim 1, wherein the main expansion system is associated with a main work recovery system. 5. The device according to claim 4, comprising mechanical and/or electrical coupling means between said main work recovery system and the first vapour compression system and/or the second vapour compression system. 6. The device according to claim 1, wherein the auxiliary expansion system is associated with an auxiliary work recovery system. 7. The device according to claim 6, comprising mechanical and/or electrical coupling means between said auxiliary work recovery system and the first vapour compression system and/or the second vapour compression system. 8. The device according to claim 1, wherein the internal heat exchanger is connected to an outlet of the second isobaric cooling system and to an inlet of the main expansion system on the main circuit of the cycle. 9. The device according to claim 1, wherein pressure in the main circuit of the cycle is a maximum high pressure greater than the critical pressure of the fluid. 10. The device according to claim 9, wherein pressure in the auxiliary cooling circuit of the cycle is a medium pressure of the fluid, lower than said maximum high pressure. 11. A method for performing a transcritical fluid cycle between a hot source temperature and a cold source temperature, by means of the vapour compression device according to claim 1, comprising at least the steps of: heating the fluid in the internal heat exchanger until a hot source temperature is reached, compressing the fluid to reach a medium pressure and to reach the hot source temperature, separating the fluid by the fluid distributor into the main circuit of the cycle and the auxiliary cooling circuit of the cycle, expanding the fluid on the auxiliary cooling circuit, by means of the auxiliary expansion system, until the cold source temperature is reached, expanding the fluid on the main circuit, by means of the main expansion system, until the cold source temperature is reached, performing isobaric evaporation of the fluid on the main circuit, wherein the method comprises compressing the fluid on the main circuit of the cycle, after the fluid separating step and before the associated expanding step, to reach a maximum high pressure, greater than a critical pressure of the fluid, and to substantially reach the hot source temperature, and a cooling step of the fluid to substantially reach the cold source temperature. 12. The method according to claim 11, wherein the compressing of the fluid to reach the medium pressure and to reach the hot source temperature comprises the steps of: performing substantially isentropic compression of the fluid by the first vapour compression system to reach said medium pressure, and performing isobaric cooling of the fluid by the first isobaric cooling system to reach the hot source temperature. 13. The method according to claim 11, wherein the expanding step of the fluid on the auxiliary cooling circuit of the cycle is isenthalpic or isentropic. 14. The method according to claim 11, wherein the expanding step of the fluid on the main circuit of the cycle is isenthalpic or isentropic. 15. The method according to claim 11, wherein the compressing step of the fluid, to reach a maximum high pressure greater than a critical pressure of the fluid, and to substantially reach the hot source temperature, comprises substantially isentropic compression of the fluid followed by isobaric cooling of the fluid.
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