Effect of cooling water flow rate on power generation of organic Rankine cycle system

WU Yuting; ZHAO Yingkun; LEI Biao; MENG Qingpeng; CHEN Rumeng; ZHI Ruiping; MA Chongfang

doi:10.11949/j.issn.0438-1157.20171254

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Effect of cooling water flow rate on power generation of organic Rankine cycle system

更新时间：2025-12-10

- Effect of cooling water flow rate on power generation of organic Rankine cycle system
- CIESC Journal Issue 6, Pages: 2639-2645(2018)
- 作者机构：
  
  传热强化与过程节能教育部重点实验室, 传热与能源利用北京市重点实验室, 北京工业大学环境与能源工程学院,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171254
  CLC： K115
- Online First：05 June 2018，
  
  Published：05 June 2018
- 稿件说明：
移动端阅览
WU Yuting, ZHAO Yingkun, LEI Biao, et al. Effect of cooling water flow rate on power generation of organic Rankine cycle system[J]. CIESC Journal, 2018, (6): 2639-2645.
DOI：

WU Yuting, ZHAO Yingkun, LEI Biao, et al. Effect of cooling water flow rate on power generation of organic Rankine cycle system[J]. CIESC Journal, 2018, (6): 2639-2645. DOI： 10.11949/j.issn.0438-1157.20171254.

摘要

采用自主研发的单螺杆膨胀机作为机械动力，实验研究了冷却水流量对ORC余热发电测试系统及单螺杆膨胀机性能的影响。实验结果表明：当冷却水流量从8 m3·h-1升至19 m3·h-1时，单螺杆膨胀机输出功和轴效率分别从4.31 kW、36.38%增至5.15 kW、41.1%，分别增加了19.5%、13%。针对本实验系统，在考虑润滑油泵、工质泵、冷却水泵和冷却塔风扇等所有系统辅机功耗之后，当冷却水流量为12 m3·h-1时，系统净输出功和系统净效率达到最大值，分别为2.44 kW和2.47%。通过研究冷却水流量对ORC系统性能的影响，为ORC冷却系统的设计和优化系统性能提供重要的实验依据。

Abstract

A single screw expander was used as the power generation machine. The effect of cooling water flow rate on the performance of the ORC system and the single screw expander is studied to generate power from low-grade waste heat. The results show that when the cooling water flow rate from 8 m3·h-1 to 19 m3·h-1

the output power and shaft efficiency of the single screw expander increase by 19.5% and 13% from 4.31 kW and 36.38% to 5.15 kW and 41.1%

respectively. In this experimental system

when the cooling water flow is 12 m3·h-1 and the power consumed by the circulation pump

the lubricating oil pump

the water pump and the cooling tower fan were all taken into account

the maximum value of the system net output power and the system net efficiency would be 2.44 kW and 2.47% respectively. Therefore

the cooling water flow rate significantly affected the performance of an ORC system with low-grade waste heat

which could serve as important reference for designing cooling source system and optimizing ORC system performance.

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Related Institution

Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology

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