유기랭킨사이클과 암모니아 - 물 랭킨사이클의 열역학적 성능의 비교 해석

Abstract

In this paper a comparative thermodynamics analysis is carried out for organic Rankine cycle (ORC)and ammonia-water Rankine cycle (AWRC) utilizing low-grade heat sources. Effects of the working fluid, ammoniaconcentration, and turbine inlet pressure are systematically investigated on the system performance such as massflow rate, pressure ratio, turbine-exit volume flow, and net power production as well as the thermal efficiency. Results show that ORC with a proper working fluid shows higher thermal efficiency than AWRC, however, AWRCshows lower mass flow rate of working fluid and lower pressure ratio of expander than ORC.