Experimental Research on Internal Working Process of Rotary Vane Expander in CO<sub>2</sub> Refrigeration System

杨炳春; 郭蓓; 彭学院; 邢子文

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Experimental Research on Internal Working Process of Rotary Vane Expander in CO₂ Refrigeration System

更新时间：2025-12-08

- Experimental Research on Internal Working Process of Rotary Vane Expander in CO₂ Refrigeration System
- Vol. 42, Issue 3, Pages: 313-317(2008)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB653
- Online First：10 March 2008，
  
  Published：2008
- 稿件说明：
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杨炳春, 郭蓓, 彭学院, et al. Experimental Research on Internal Working Process of Rotary Vane Expander in CO₂ Refrigeration System[J]. 2008, 42(3): 313-317.
DOI：

杨炳春, 郭蓓, 彭学院, et al. Experimental Research on Internal Working Process of Rotary Vane Expander in CO₂ Refrigeration System[J]. 2008, 42(3): 313-317. DOI：

摘要

为了提高制冷系统的效率

研制了滑片膨胀机

以替代跨临界CO

制冷循环中的节流阀.利用膨胀机气缸上2只相隔一定角度的压力传感器

获得了工作腔内压力随转角变化的完整曲线(p-θ图)

并通过p-θ图分析了膨胀机的内部热力过程.研究结果表明:所研制的滑片膨胀机能够实现连续、稳定的膨胀过程

但严重的内部泄漏使得膨胀过程中的压力下降非常迅速

并导致过度膨胀现象发生; 通过在滑片底部设置弹簧

改善滑片与气缸内壁之间的密封

在p-θ图上能观察到膨胀过程趋于理想的情况; 在膨胀机的进、出口之间密封圆弧处增加密封条

可以显著提高膨胀机的进、出口压力差

说明该处泄漏得到大幅减少; 所研制的膨胀机绝热效率在20%左右

且随转速的改变没有明显的变化

降低高压差下的气体泄漏是今后样机改进的重点.

Abstract

A rotary vane expander was developed to replace the throttling valve to improve the coefficient of performance of the transcritical CO

refrigeration cycle. A diagram of pressure variation with rotation angle(p-θ diagram)was recorded with two pressure sensors arranged in the expansion chamber in different angle positions. The internal thermodynamic process was analysed by means of the p-θ diagrams. The experimental results show that the rotary vane expander can work continuously and steadily while the serious internal leakage results in more rapid decrease in pressure during expansion than expected

leading to an unfavorable over-expansion. Arranging springs beneath the vanes can improve t

he expansion process by keeping a tight contact between the vane and the cylinder wall. A seal arranged between the inlet and outlet ports can increase the pressure difference through the expander by reducing the leakage directly from the high-pressure suction chamber to the low-pressure discharge chamber. The adiabatic efficiency is estimated to be about 20 percent and changes little with the rotation speed.

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references

BAEK J S, GROLL E A, LAWLESS P B. Piston-cylinder work producing expansion device in a transcritical carbon dioxide cycle: experimental investigation [J]. International Journal of Refrigeration, 2005, 28(2): 141-151.

HUFF H J, RADERMACHER R. Experimental Investigation of a scroll expander in a carbon dioxide air-conditioning system [C]∥ International Congress of Refrigeration, Washington, D.C.: School of Mechanical Engineering, Purdue University, 2003.

NICKL J, WILL G, QUACK H, et al. Integration of a three-stage expander into a CO2 refrigeration system [J]. International Journal of Refrigeration, 2005, 28(8): 1219-1224.

ZHANG Bo, PENG Xueyuan, HE Zelong, et al. Development of a double acting free piston expander for power recovery in transcritical CO2 cycle [J]. Applied Thermal Engineering, 2007, 27(8/9): 1629-1636.

ZHA SHITONG, MA Yitai, SUN Xi. The Development of CO2 expander in CO2 transcritical cycles [C]∥ International Congress of Refrigeration. Washington, D.C.:School of Mechanical Engineering, Purdue University, 2003.

FUKUTA M,YANAGISAWA T. Performance prediction of vane type expander for CO2 cycle [C]∥International Congress of Refrigeration. Washington, D.C.: School of Mechanical Engineering, Purdue University,2003.

YANG Bingchun, ZENG Hangsong, GUO Bei, et al. Development of rotary vane expander for CO2 trans-critical refrigeration cycle [C]∥IIR Gustav Lorentzen Conference. Trondheim, Norway:NINU,2006.

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西安交通大学能源与动力工程学院，710049，西安School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

College of Mechanical Engineering, Yanshan University

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Experimental Research on Internal Working Process of Rotary Vane Expander in CO2 Refrigeration System

DOI：

摘要

Abstract

关键词

Keywords

references

Experimental Research on Internal Working Process of Rotary Vane Expander in CO₂ Refrigeration System