Experimental investigation on a 4 kW organic Rankine cycle system subjected to different heat source flow rates and temperatures

LI Jifei; LI Ruixia; MIAO Zheng; XU Jinliang

doi:10.19666/j.rlfd.202110225

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Experimental investigation on a 4 kW organic Rankine cycle system subjected to different heat source flow rates and temperatures

更新时间：2025-09-28

- Experimental investigation on a 4 kW organic Rankine cycle system subjected to different heat source flow rates and temperatures
- Thermal Power Generation Vol. 51, Issue 5, Pages: 106-112(2022)
- 作者机构：
  
  1. 中石化新星(北京)新能源研究院有限公司
  2. 低品位能源多相流与传热北京市重点实验室(华北电力大学)
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202110225
  CLC： TM61
- Published：2022
- 稿件说明：
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LI Jifei, LI Ruixia, MIAO Zheng, et al. Experimental investigation on a 4 kW organic Rankine cycle system subjected to different heat source flow rates and temperatures[J]. Thermal power generation, 2022, 51(5): 106-112.
DOI：

LI Jifei, LI Ruixia, MIAO Zheng, et al. Experimental investigation on a 4 kW organic Rankine cycle system subjected to different heat source flow rates and temperatures[J]. Thermal power generation, 2022, 51(5): 106-112. DOI： 10.19666/j.rlfd.202110225.

摘要

针对地热、太阳能集热等中低温热源驱动有机朗肯循环（organic rankine cycle

ORC）分布式发电系统的多工况运行需求，测试了采用R245fa工质的4 k W级ORC实验机组在热源温度和流量变化条件下的多工况动态/稳态运行特性。结果表明：在换热器面积冗余较大，热源温降较小的情况下，热源温度变化对膨胀机进出口温压参数和机组输出功率的影响更显著，而热源流量变化的影响可以忽略；相对于热源流量变化，热源温度调整后ORC机组的趋稳时间较长；ORC机组输出功对热源温度和工质流量变化敏感，测试工况范围内，在热源温度150℃时获得最大输出功约3 800 W，最大热效率5.12%。

Abstract

To analyze the operating characteristics of the distributed organic Rankine cycle(ORC) system driven by low-medium temperature heat source(such as the geothermal and solar thermal heat source) under various conditions

a 4 kW ORC prototype using R245fa as working fluid was tested. The dynamic and steady state operating performance of the ORC test rig were analyzed. The results show that

the influence of heat source temperature variation on the temperatures and pressures at the inlet/outlet of the expander as well as the shaft power was more significant than that of the heat source fluid flow rate

due to the redundancy design of the evaporator and the relatively small temperature drop of the heat source. The ORC system needed more time to approach the next steady state after step change of the heat source temperature than the heat source fluid flow rate. The output work of the ORC unit was sensitive to the changes of heat source temperature and working medium flow

during the test

the maximum shaft power(about 3 800 W) and highest thermal efficiency(5.12%) were achieved at the heat source temperature of 150 ℃.

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