Refrigerant circulating pump, refrigerant circulating pump system, method of pumping refrigerant, and rankine cycle system
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United States of America Patent
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Sep 18, 2012
Grant Date -
Nov 12, 2009
app pub date -
Apr 28, 2009
filing date -
Sep 17, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Rankine cycle system has a condenser, a refrigerant circulating pump connected to the condenser, a heat collecting device connected to the refrigerant circulating pump, and an expansion turbine connected to the heat collecting device and the condenser. The refrigerant circulating pump includes an expansion tank or pressure vessel, a refrigerant supply conduit connected to the lower part of the expansion tank and to the condenser, and a refrigerant discharge conduit connected to the upper part of the expansion tank. An open/close valve is installed in the refrigerant supply conduit. A pressure regulating valve installed in the refrigerant discharge pipe opens when a pressure reaches a specified value or higher. A temperature regulating device can heat the refrigerant in the expansion tank to produce a refrigerant vapor of saturated temperature or higher, which vapor can be introduced into the heat collecting device.
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