Abstract
This paper proposes a new Rankine-type cycle for power generation from low temperature heat source such as waste heat and solar energy. The proposed cycle doesn't use a working fluid pump whose power consumption aggravates a net thermal efficiency of Rankine cycle. Instead of the pump, the cycle uses valves switching hot and cold source fluids in heat exchanger. Operating principle of the cycle was shown, and the experiment was performed by using an expansion valve which simulates turbine/expander. Liquid-vapor change was observed in the simulated turbine. And it was shown that the cycle can produce enthalpy difference between turbine inlet and outlet.
