Parametric Optimization of Organic Rankine Cycle with R245fa/R601a as Working Fluid

• Published in: Transactions of Tianjin University Vol. 21; no. 1; pp. 69 - 75
• Main Author: 朱家玲 康振华 安青松 李太禄
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 2015; Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education, Tianjin University, Tianjin 300072, China%School of Energy and Safety Engineering, Tianjin Chengjian University, Tianjin 300384, China
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 出口温度; 参数优化; 工作流体; 工质; 朗肯循环; 热水温度; 蒸发温度; 非共沸混合物; system performance; optimization parameter; medium temperature geothermal source; organic Rankine cycle; zeotropic mixture
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-015-2361-8

In order to select the appropriate working fluids and optimize parameters for medium-temperature geothermally-powered organic Rankine cycle （ORC）, R245fa is mixed with R601 a at geothermal water temperature of 110℃. Based on thermodynamics, the characteristics of mixture and its influence on the performance of ORC under different evaporating temperatures and composition proportions are analyzed. Results show that the zeotropic mixture R245fa/R601a （0.4/0.6） has the highest performance. When the evaporating temperature reaches 67 ℃, the outlet temperature of geothermal water is 61℃, the net power output is the highest and the thermal efficiency is about 9%.