| 摘要 |
A pumping apparatus 50 for a heat engine 10 e.g. using an Organic Rankine Cycle, uses working fluid extracted from the working circuit. A fraction of the working fluid is extracted in extraction line 60 after the main heat exchanger 14 and is further heated in a pumping heat exchanger 52 before being compressed in a compressor 54. Low pressure liquid is admitted to pumping chambers 62, 64 via non-return valves 78, and the compressed pumping fluid is alternately admitted to pumping chambers 62, 64 to pump the liquid by direct contact. |
