Working fluid selection for organic Rankine cycle in low temperature waste heat system

LI Hengfan; ZHAO Yujin; HAN Zhonghe

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Working fluid selection for organic Rankine cycle in low temperature waste heat system

更新时间：2025-09-28

- Working fluid selection for organic Rankine cycle in low temperature waste heat system
- Thermal Power Generation Vol. 45, Issue 8, Pages: 20-25(2016)
- 作者机构：
  
  华北电力大学电站设备状态监测与控制教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK115;TK124
- Published：2016
- 稿件说明：
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LI Hengfan, ZHAO Yujin, HAN Zhonghe. Working fluid selection for organic Rankine cycle in low temperature waste heat system[J]. Thermal power generation, 2016, 45(8): 20-25.
DOI：

LI Hengfan, ZHAO Yujin, HAN Zhonghe. Working fluid selection for organic Rankine cycle in low temperature waste heat system[J]. Thermal power generation, 2016, 45(8): 20-25. DOI：

摘要

为研究非共沸混合工质的蒸发换热特性

得到换热过程最接近理想换热的工质

本文选取R245fa+cyclohexane作为混合工质组元

建立蒸发换热段数学模型

并对不同配比下混合工质的最佳烟气进口温度及火用损比进行分析

从而得到不同工质的最佳烟温和最理想的工质配比。结果表明:不同配比的混合工质存在不同的最佳烟气进口温度;R245fa+cyclohexane在配比为0.56+0.44时火用损比最小

换热过程最接近理想换热。

Abstract

In order to study the heat transfer characteristics of the low-temperature organic Rankine cycle(ORC)and obtain the optimum refrigerant mixtures

this paper select R245fa+cyclohexane as the component of mixed fluid to establish numerical model for the evaporator.By analyzing the optimal outlet temperature and exergy loss ratio of the flue gas under conditions with different mixed fluids

the optimal gas temperature at different compositions and the optimal performance refrigerants were ascertained.The results show that

the mixture with different compositions has different optimum gas temperature.When the mass ratio of R245 fa to cyclohexane in the mixed fluid equaled 0.56∶0.44

the fluid's exergy loss was the minimum and the heat transfer process was the closest to the ideal heat transfer.

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