Research on thermodynamic characteristics and experimental verification of ORC oil-free scroll expander

PENG Bin; YANG Baokun; GONG Kaigang; ZHANG Pengcheng; XU Jianwei; LIU Huixin

doi:10.19666/j.rlfd.202210243

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Research on thermodynamic characteristics and experimental verification of ORC oil-free scroll expander

更新时间：2025-09-28

- Research on thermodynamic characteristics and experimental verification of ORC oil-free scroll expander
- Thermal Power Generation Vol. 52, Issue 8, Pages: 60-69(2023)
- 作者机构：
  
  兰州理工大学机电工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202210243
  CLC： TK115
- Published：2023
- 稿件说明：
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PENG Bin, YANG Baokun, GONG Kaigang, et al. Research on thermodynamic characteristics and experimental verification of ORC oil-free scroll expander[J]. Thermal power generation, 2023, 52(8): 60-69.
DOI：

PENG Bin, YANG Baokun, GONG Kaigang, et al. Research on thermodynamic characteristics and experimental verification of ORC oil-free scroll expander[J]. Thermal power generation, 2023, 52(8): 60-69. DOI： 10.19666/j.rlfd.202210243.

摘要

为详细研究无油涡旋膨胀机的热力学特性，基于热力学第一定律、能量和质量平衡方程建立了泄漏模型和热力学模型，并进一步改变不同的工况参数来研究涡旋膨胀机泄漏量的变化情况。在综合考虑传热与泄漏对热力学模型的影响下，采用欧拉法对建立的热力学模型进行求解，得到并分析了涡旋膨胀机在运行1个周期内工质的压力、温度、质量随主轴转角变化情况。最后，通过搭建试验平台，对所建立的涡旋膨胀机热力学模型进行试验验证，并为涡旋膨胀机的性能分析提供一定的借鉴作用。

Abstract

In order to study the thermodynamic characteristics of oil-free scroll expander in detail

leakage and thermodynamic model are established based on the first law of thermodynamics and the equation of energy and mass balance. Through the established leakage model

different working condition parameters are further changed to study the changing trend of the leakage in the scroll expander. Under the comprehensive consideration of the influence of heat transfer and leakage on the thermodynamic model

the Euler method is used to solve the established thermodynamic model

pressure

temperature and mass variation of the working medium with the orbiting angle of the main shaft during one operation cycle of the scroll expander are obtained and analyzed. Finally

an experiment platform is set up to test and verify the established thermodynamic model of the scroll expander

which can provide a certain reference for the performance analysis of the scroll expander.

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