Energy from temp. difference between two levels - is extracted by evaporation at low and condensation at high level using liq. to drive turbine

摘要

The arrangement is intended for extracting usable energy from a medium flowing in a system in which there is a temp. differential between two points at different levels. It comprises a closed circuit (WTu R1 Wto R2 FT) which contains a low-level heat exchanger (WTu) a higher level heat exchanger (WTo) and a liquid-driven turbine (FT) or hydraulic motor. This circuit contains a fluid which evaporates in the lower exchanger (WTu) rises (R1) to the upper exchanger (WTo) where it returns the heat extracted to the medium and condenses and then drops (R2) to the turbine (FT) where its potential energy is converted into mechanical energy before re-entering the lower exchanger.