Simulation of Scroll Expander Used in Low-Temperature Waste Heat Recovery System

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Simulation of Scroll Expander Used in Low-Temperature Waste Heat Recovery System

更新时间：2025-07-09

- Simulation of Scroll Expander Used in Low-Temperature Waste Heat Recovery System
- Vol. 43, Issue 7, Pages: 88-91(2009)
- 作者机构：
  
  西安交通大学流体机械及压缩机国家工程研究中心,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM61
- Online First：10 July 2009，
  
  Published：2009
- 稿件说明：
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Simulation of Scroll Expander Used in Low-Temperature Waste Heat Recovery System[J]. 2009, 43(7): 88-91.
DOI：

Simulation of Scroll Expander Used in Low-Temperature Waste Heat Recovery System[J]. 2009, 43(7): 88-91. DOI：

摘要

采用R123为循环工质

建立了应用于低温余热回收系统中涡旋膨胀机工作过程的数学模型

分析了吸、排气损失和泄漏、传热对涡旋膨胀机工作过程的影响.结果表明:涡旋膨胀机实际工作过程与理论过程存在偏差

吸气和排气过程存在压力损失

整个过程中伴随着泄漏与热传递; 膨胀腔内工质的质量在吸气结束时低于理论值

膨胀过程中工质的质量先减小再增大; 实际输气量和输出功率随转速的增加而增大

但增加量随转速的增加而减小; 容积效率随转速的增加而增大; 降低径向和轴向间隙可以提高膨胀机的容积效率.

Abstract

A mathematic model of the scroll expander in the low-temperature waste heat recovery system using R123 as working fluid was established and the effects of suction and discharge

leakage

and heat transfer on its working process were analyzed. The results show that the actual process is different from the theoretic one because of the pressure loss in the suction and discharge processes and the leakage and heat transfer in the entire process. The working fluid mass in the expansion chamber is less than the theoretic value after the suction process

and it decreases at the beginning of expansion and then increases. The actual delivery and power output increase but their increments decrease with the increase of the rotational speed. The volumetric efficiency increases with the rotational speed. In addition

the volumetric efficiency may be enhanced by reducing theradial clearance and axial clearance.

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references

HUNG T C. Waste heat recovery of organic Rankine cycle using dry fluids[J]. Energy Conversion and Management,2001,42(5):539-553.

YAMAMOTO T,FURUHATA T, ARAI N,et al. Design and testing of the organic Rankine cycle[J]. Energy,2001,26(3):239-251.

MAIZZA V, MAIZZA A. Unconventional working fluids in organic Rankine-cycles for waste energy recovery systems[J]. Applied Thermal Engineering,2001,21(3):381-390.

GAO Xiaojun, LI Liansheng, ZHAO Yuanyang, et al. Research on a scroll expander used recovering work in a fuel dell [J]. Int J of Thermodynamics, 2004,7(1): 1-8.

KIM H J,AHN J M,CHO S O,et al. Numerical simulation on scroll expander-compressor unit for CO2 trans-critical cycles[J]. Applied Thermal Engineering, 2008,28(13): 1654-1661.

PETERSON R B,WANG H,HERRON T. Performance of a small regenerative Rankine power cycle employing a scroll expander[J]. Proceedings of the Institution of Mechanical Engineers: A, 2007,222(3):271-282.

KIM H J, AHN J M, PARK I, et al. Scroll expander for power generation from a low-grade steam source[J]. Proceedings of the Institution of Mechanical Engineers: A, 2007,221(5):705-712. [8] 顾兆林,郁永章,冯诗愚.涡旋压缩机及其它涡旋机械[M].西安:陕西科学技术出版社,1998:131-154.

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