Method and device for rapid oil heating for oil-lubricated expansion machines
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01K-025/08
F01K-013/02
F01K-025/06
F01C-021/04
F01K-007/22
F01K-023/10
F01D-025/20
F22B-001/18
출원번호
US-0112860
(2012-04-12)
등록번호
US-10202872
(2019-02-12)
우선권정보
EP-11003615 (2011-05-03)
국제출원번호
PCT/EP2012/001597
(2012-04-12)
§371/§102 date
20160524
(20160524)
국제공개번호
WO2012/149998
(2012-11-08)
발명자
/ 주소
Aumann, Richard
Schuster, Andreas
Sichert, Andreas
출원인 / 주소
ORCAN ENERGY AG
대리인 / 주소
Moore & Van Allen PLLC
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
The present invention relates to a method for lubricant heating during starting up of a thermodynamic cycle device, wherein the cycle device comprises a working medium with a working substance and a lubricant, an evaporator for evaporating the working substance, a lubricant separator for separating
The present invention relates to a method for lubricant heating during starting up of a thermodynamic cycle device, wherein the cycle device comprises a working medium with a working substance and a lubricant, an evaporator for evaporating the working substance, a lubricant separator for separating at least part of the lubricant from the working medium which is supplied by the evaporator, an expansion machine which is to be lubricated with the lubricant, and a condenser device with a condenser, and wherein the method comprises the following steps: delivery of lubricant from the lubricant separator to the condenser device and/or to the evaporator during shutdown of the cycle device, as a result of which a working medium which is enriched with lubricant is provided in the condenser device and/or in the evaporator; and heating of the working medium which is enriched with lubricant in the evaporator during starting up of the cycle device. Furthermore, the invention relates to a thermodynamic cycle device which comprises means for delivering lubricant from the lubricant separator to the condenser device and/or to the evaporator during shutdown of the cycle device, as a result of which a working medium which is enriched with lubricant can be provided in the condenser device and/or in the evaporator.
대표청구항▼
1. Method for lubricating a thermodynamic cycle device, wherein the cycle device comprises a working medium including a working substance and a lubricant, an evaporator for evaporating the working substance, a lubricant separator for separating at least a portion of the lubricant from the working me
1. Method for lubricating a thermodynamic cycle device, wherein the cycle device comprises a working medium including a working substance and a lubricant, an evaporator for evaporating the working substance, a lubricant separator for separating at least a portion of the lubricant from the working medium supplied from the evaporator, an expansion machine to be lubricated with the lubricant, and a condenser apparatus having a condenser, and wherein the method comprises the steps of: supplying lubricant from the lubricant separator to the condenser apparatus and/or to the evaporator upon shutting down the cycle device so as to provide a working medium enriched with the lubricant in the condenser apparatus and/or in the evaporator, wherein supplying lubricant from the lubricant separator upon shutting down the cycle device includes a rapid reduction of pressure in the lubricant separator resulting in evaporation of the working substance dissolved in the lubricant and a frothing up of the lubricant, thereby moving lubricant from the lubricant separator to the condenser apparatus and/or the evaporator; andheating the working medium enriched with the lubricant in the evaporator upon starting up the cycle device. 2. The method according to claim 1, wherein the supplying of lubricant from the lubricant separator upon shutting down the cycle device includes a reduction of the pressure in the lubricant separator. 3. The method according to claim 2, wherein the reduction of the pressure in the lubricant separator is realized after a standstill of the expansion machine. 4. The method according to claim 1, wherein the cycle device further comprises a bypass line between the lubricant separator and the condenser apparatus so as to bypass the expansion machine, and wherein the bypass line is opened and closed by means of a first valve and wherein a step of supplying lubricant from the lubricant separator to the condenser apparatus includes the opening of the first valve. 5. The method according to claim 4, wherein the first valve is a solenoid valve. 6. The method according to claim 1, comprising the further step of: stopping a supply of working medium to the evaporator upon shutting down the cycle device prior to the supply of lubricant from the lubricant separator to the condenser apparatus and/or the evaporator. 7. The method according to claim 1, wherein the condenser apparatus further comprises a feed container in which condensed working substance is collected, and wherein the cycle device further comprises a feed pump; and wherein a step of supplying lubricant from the lubricant separator to the condenser apparatus upon shutting down the cycle device comprises a supplying of lubricant from the lubricant separator to the feed container; andwherein the step of heating the working substance enriched with the lubricant in the evaporator upon starting up the cycle device comprises a pumping of working medium enriched with the lubricant from the feed container to the evaporator by means of the feed pump. 8. The method according to claim 4, comprising the further steps of: conducting evaporated working substance to the condenser, through the bypass line, upon starting up the cycle device;detecting a filling level of lubricant in the lubricant separator; andconducting the evaporated working substance to the expansion machine upon detecting a predetermined filling level, by closing the first valve of the bypass line. 9. The method according to claim 8, comprising the additional step of: opening a second valve in a lubricant conduit from the lubricant separator to the expansion machine. 10. The method according to claim 9, wherein the second valve is a solenoid valve. 11. Thermodynamic cycle device comprising: a working medium including a working substance and a lubricant;an evaporator for evaporating the working substance;a lubricant separator for separating at least a portion of the lubricant from the working medium supplied from the evaporator;an expansion machine to be lubricated with the lubricant;a condenser apparatus having a condenser; andmeans for supplying lubricant from the lubricant separator to the condenser apparatus and/or to the evaporator when the cycle device is shut down, so that a working medium enriched with the lubricant can be provided in the condenser apparatus and/or in the evaporator, the means for supplying lubricant from the lubricant separator comprising a connection conduit connecting a steam-side outlet of the lubricant separator and the condenser apparatus and/or the evaporator, the conduit including a valve configured to provide a rapid reduction of pressure in the lubricant separator resulting in evaporation of the working substance dissolved in the lubricant and a frothing up of the lubricant, thereby moving lubricant from the lubricant separator to the condenser apparatus and/or the evaporator. 12. The cycle device according to claim 11, in which the means for supplying lubricant from the lubricant separator to the condenser apparatus comprise a bypass line provided with a first valve between the lubricant separator and the condenser apparatus for bypassing the expansion machine and/or the means for supplying lubricant from the lubricant separator to the evaporator comprise a lubricant conduit between the evaporator and the lubricant separator. 13. The cycle device according to claim 11, in which the condenser apparatus further comprises a feed container in which condensed working substance and lubricant from the lubricant separator can be collected, and wherein the cycle device further comprises a feed pump for pumping working medium enriched with the lubricant from the feed container to the evaporator. 14. The cycle device according to claim 11, in which means for detecting a filling level of lubricant in the lubricant separator are provided. 15. The cycle device according to claim 11, in which a lubricant conduit comprising a second valve is provided between the lubricant separator and the expansion machine, wherein the lubricant separated in the lubricant separator can be conducted in the lubricant conduit to lubricating points of the expansion machine. 16. The cycle device according to claim 11, in which the cycle device is an Organic Rankine Cycle device and/or in which the expansion machine is selected from the group consisting of a piston expansion machine, screw expansion machine, a scroll expander, a vane-type machine and a Roots expander. 17. The cycle device according to claim 12, wherein the first valve is a solenoid valve. 18. The cycle device according to claim 15, wherein the second valve is a solenoid valve. 19. The cycle device according to claim 15, wherein the lubricant separated in the lubricant separator can be conducted in the lubricant conduit to a bearing of the expansion machine. 20. Steam power plant comprising the device according to claim 11.
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