CAJ | 학술논문

为提高有机朗肯循环（Organic Rankine Cycle, ORC）在中低温地热収电领域的效率，本文以R1234yf为工质，依据热力学第一定律与第二定律分析了系统单位质量热水净収电功率和系统?效率，幵与目前应用广泛的R245fa工质进行了性能对比。研究结果表明，存在最佳蒸収温度和最佳冷凝温度，使得ORC収电系统单位质量热水净収电功率、?效率最大。对于热源温度为110℃~150℃的ORC収电系统，R1234yf对应的最大系统单位质量热水净収电功率和最大?效率均大于R245fa。
위제고유궤랑긍순배（Organic Rankine Cycle, ORC）재중저온지열수전영역적효솔，본문이R1234yf위공질，의거열역학제일정률여제이정률분석료계통단위질량열수정수전공솔화계통?효솔，견여목전응용엄범적R245fa공질진행료성능대비。연구결과표명，존재최가증수온도화최가냉응온도，사득ORC수전계통단위질량열수정수전공솔、?효솔최대。대우열원온도위110℃~150℃적ORC수전계통，R1234yf대응적최대계통단위질량열수정수전공솔화최대?효솔균대우R245fa。
This paper presents a study on optimizing low-medium temperature geothermal Organic Rankine Cycle (ORC) power generation. Here we examine the effect of working fluid R1234yf on net power output per kilogram of geothermal water and exergy efficiency of the system by using first and second thermodynamic laws. The overall system performance is then compared with the system using R245fa. The results show that there exist the optimum evaporation and condensation temperature which can maximize net power output per kilogram geothermal water and exergy efficiency of the system. The maximum net power output per kilogram of geothermal water and exergy efficiency is higher by using R1234yf as working fluid at the geothermal source temperature ranging from 110oC to 150oC.