A PUMPING APPARATUS

摘要

There is disclosed a pumping apparatus (50) for a heat engine (10), comprising: an extraction line (60) arranged to extract a fraction of working fluid from a working circuit (12) of a heat engine (10);a compressor (54) for compressing the extracted working fluid to provide a pressurised motive gas; and a pressure-operated pump (56) for pumping the working fluid around the working circuit (12), wherein the pump is driven by the pressurized motive gas.