Experimental and numerical study on scroll compressor under different profile correction and discharge ports shapes

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-15 DOI:10.1016/j.ijrefrig.2024.10.007

Kang Li , Chunyu Li , Soheil Mohtaram , Ni Liu , Hua Zhang , Binlin Dou , Chao Li , Qize He , Mohd Abul Hasan , Saiful Islam , Jingwu Wang , Zilong Wang , Jianhong Chen , Yashar Aryanfar

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引用次数: 0

Abstract

The scroll compressor is an essential component in air conditioning and heat pump systems. This study examined an electric scroll compressor using R22 refrigerant, focusing on how modifications in the scroll head profile and discharge structure affect its performance. Initially, a semi-empirical model based on mathematical formulas was developed to predict the performance improvements of the updated scroll compressor. Three-dimensional simulation software was then used to illustrate changes in the internal flow dynamics before and after enhancements. The predictions were validated through experimental testing. Both the semi-empirical model and the three-dimensional unsteady numerical calculation model analyzed the effects of modifications to the tooth head profile and discharge port shape on compressor performance. The adoption of a PMP profile correction delayed the compressor discharge process, shifting the starting discharge angle from 315°to 344°, thereby reducing under-compression occurrences during operation and increasing volumetric efficiency by 1.31%. Additionally, mathematical formulas correlating temperature with compressor performance were developed from fitting data, predicting compressor behavior under various conditions. Moreover, replacing a circular discharge port with a waist-shaped port reduced power consumption by 0.59 kW, resulting in a more uniform temperature distribution and enhanced mass flow rate during compressor operation.

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不同剖面校正和排气口形状下涡旋式压缩机的实验和数值研究

涡旋式压缩机是空调和热泵系统的重要组成部分。本研究考察了使用 R22 制冷剂的电动涡旋压缩机，重点是涡旋头轮廓和排气结构的改进对其性能的影响。首先，开发了一个基于数学公式的半经验模型，用于预测更新后涡旋压缩机的性能改进。然后使用三维模拟软件来说明改进前后内部流动动力学的变化。通过实验测试对预测结果进行了验证。半经验模型和三维非稳态数值计算模型都分析了齿头轮廓和排气口形状的修改对压缩机性能的影响。采用 PMP 剖面修正延迟了压缩机的排气过程，将起始排气角度从 315°移至 344°，从而减少了运行期间出现的压缩不足现象，并将容积效率提高了 1.31%。此外，还根据拟合数据建立了温度与压缩机性能相关的数学公式，以预测压缩机在各种条件下的行为。此外，用腰形排气口取代圆形排气口可减少 0.59 千瓦的功率消耗，从而使温度分布更加均匀，压缩机运行时的质量流量也得到了提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.