Geometrical Characteristics of Screw Refrigeration Compressor under Part-Load Conditions

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Geometrical Characteristics of Screw Refrigeration Compressor under Part-Load Conditions

更新时间：2025-11-17

- Geometrical Characteristics of Screw Refrigeration Compressor under Part-Load Conditions
- Vol. 45, Issue 4, Pages: 126-132(2011)
- 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： TB652
- Published：2011
- 稿件说明：
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陈文卿. Geometrical Characteristics of Screw Refrigeration Compressor under Part-Load Conditions[J]. 2011, 45(4): 126-132.
DOI：

陈文卿. Geometrical Characteristics of Screw Refrigeration Compressor under Part-Load Conditions[J]. 2011, 45(4): 126-132. DOI：

摘要

基于螺杆压缩机的工作特点

确定部分负荷下各工作过程的特征角度

建立了有效旁通面积和有效径向排气面积的计算模型

从而可以准确得到不同负荷下任一转角所对应的流通面积

为部分负荷下螺杆制冷压缩机工作特性研究奠定了基础.考察了固定块长度以及滑阀相对气缸端面的安装位置等关键设计参数对压缩机部分负荷下内容积比、有效旁通面积和有效径向排气面积的影响.研究表明

若运行工况压力比单一

固定块应选择固定式

其长度取转子长度的20%～25%为宜

若运行工况压力比多变

应选择可调式固定块

而滑阀相对气缸端面的安装角度应在安装空间允许范围内尽可能大

以提高螺杆制冷压缩机在部分负荷时的性能.

Abstract

On the basis of the operating feature of screw compressors

the critical angles of the working chamber in different processes were determined under part-load conditions. A model was established to calculate the effective by-pass area and radial discharge area at a certain rotation angle of the male rotor under various part-load conditions. The influences of key design parameters on the geometrical characteristics of a screw refrigeration compressor under part-load conditions were investigated

such as the slide stop length and slide valve installation position relative to the cylinder. The results show that

in order to improve the performance of screw refrigeration compressors under part-load conditions

the fixed type slide stop with 20%-25% of the rotor length should be adopted for a fixed external pressure ratio while the moveable type should be applied for variable external pressure ratios. Moreover

the slide valve installation angles relative to the cylinder should be as large as possible in the installation space.

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references

CECCHINATO L. Part load efficiency of packaged air-cooled water chillers with inverter driven scroll compressors [J]. Energy Conversion and Management, 2010, 51(7):1500-1509.

MUJIC E, KOVACEVIC A, STOSIC N, et al. The influence of port shape on gas pulsations in a screw compressor discharge chamber [J]. Proceedings of the Institution of Mechanical Engineers: Part E Journal of Process Mechanical Engineering, 2008, 222(4):211-223.

FLEMING J S, TANG Y. The twin helical screw compressor: part 2 A mathematical model of the working process [J]. Proceeding of the Institution of Mechanical Engineers: Part C Journal of Mechanical Engineering Science, 1998, 212(5):369-380.

O'NEIL P A. Industrial compressors: theory and equipment [M]. Oxford, UK: Butterworth-Heinema-nn Ltd., 1993:352-367.

邢子文. 螺杆压缩机: 理论、设计及应用[M]. 北京:机械工业出版社, 2000:218-228.

吴华根, 彭学院, 邢子文, 等. 部分负荷工况下螺杆制冷压缩机特性试验研究[J]. 机械工程学报, 2004, 40(7):195-198.

WU Huagen, PENG Xueyuan, XING Ziwen, et al. Experimental investigation of screw refrigeration compressors under part-load conditions [J]. Chinese Journal of Machinery Engineering, 2004, 40(7):195-198.

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