Published As:
US8215114
Title:
Expander Lubrication in Vapour Power Systems
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PCT Application Office Action Grant
United States
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China
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Europe
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Japan
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Patent Cooperation Treaty
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South Korea
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United Kingdom
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Figure
Figure 1 - US8215114
Priority Date
09
Jun
06
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Abstract:
A vapor power generating system for generating power by using heat from a source of heat. The system has a closed circuit for a working fluid, and includes a heat exchanger assembly (1) for heating the fluid under pressure with heat from the source, a separator (8) for separating the vapor phase of the heated fluid from the liquid phase thereof, an expander (14) for expanding the vapor to generate power, a condenser (17) for condensing the outlet fluid from the expander (14), a feed pump (F) for returning condensed fluid from the condenser (17) to the heater and a return path for returning the liquid phase from the separator to the heater.; The liquid phase of the working fluid contains a lubricant which lubricant is soluble or miscible in the liquid phase and a bearing supply path (21) is arranged to deliver liquid phase pressurized by the feed pump (F) to at least one bearing for a rotary element of the expander.
Claim 1:
A vapour power generating system for generating power by using heat from a source of heat, comprising a closed circuit for a working fluid, the system including heating means for heating the fluid under pressure with heat from the source, a separator for separating the vapour phase of the heated fluid from the liquid phase thereof, an expander for expanding the vapour to generate power, a condenser for condensing the outlet fluid from the expander, feed pump means for returning condensed fluid from the condenser to the heater and a return path for returning the liquid phase from the separator to the heater, wherein the liquid phase contains a lubricant for the bearing which lubricant is soluble or miscible in the liquid phase and a bearing supply path is arranged to deliver liquid phase pressurised by the feed pump means to at least one bearing for a rotary element of the expander.