G124 Experiment of pumpless Rankine-type cycle for low-temperature waste heat recovery

Abstract

A unique pumpless Rankine-type cycle for power generation from low temperature heat source such as waste heat was demonstrated. This cycle does not use a working fluid pump. Instead of the pump, it uses valves switching hot and cold sources in heat exchangers. Dynamic characteristic of the proposed cycle was examined by small-scale prototype system. Trochoidal expander and expansion nozzle were used to perform and emulate power generation process. The result shows that the proposed cycle can produce actual power.