The Rankine cycle for waste heat regeneration

Japanese Patent JP6115456

B2

PROBLEM TO BE SOLVED: To improve a separation efficiency more than that of the prior art when lubricant oil to be supplied to a sliding part of an expander is separated from a refrigerant at the time of preliminary operation of a waste heat regeneration Rankine cycle.SOLUTION: A Rankine cycle 1 comprises bypass passages C10, C11 forming a parallel circuit with an expander 13 so as to cause a refrigerant to flow from a heat exchanger 11 to a condenser 16 without passing through the expander 13; a pressure reducer valve 21 arranged in the bypass passages C10, C11; and an oil separator 15 for separating lubricant oil from a refrigerant fed out of the pressure reducer valve 21 and supplying it to a sliding part F of the expander 13. When a preliminary operation is performed, the refrigerant flows from the heat exchanger 11 through the bypass passages C10, C11 to the condenser 16 and at the same time lubricant oil separated by the oil separator 15 is supplied to the sliding part F, and the pressure reducing valve 21 decreases downstream side refrigerant pressure more than upstream side refrigerant pressure to cause a separation efficiency of lubricant oil to be improved.

Yasuhiro Takeuchi
Hiroshi Kano
Nobutaka Fukuda
Muramatsu Kenshiro

JP2013250281A

April 19, 2017

December 03, 2013

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株式会社日本自動車部品総合研究所
株式会社デンソー

F01K25/10; F01C1/02; F01C13/04; F01C19/08; F01C21/04; F01D17/00; F01P3/20; F02G5/00

JP2013142296A
JP2008248703A
JP2006300004A
JP5954712A
JP2014505826A
JP2008175123A

WO2012097964A2

Patent Business Corporation Yuai Patent Office

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