...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of thermal analysis and calorimetry >Beta Stirling refrigerator performance using a tubular heat exchanger with elliptical tube layouts and a cylinder with different bores
【24h】

Beta Stirling refrigerator performance using a tubular heat exchanger with elliptical tube layouts and a cylinder with different bores

机译：Beta Stirling refrigerator performance using a tubular heat exchanger with elliptical tube layouts and a cylinder with different bores

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

The Stirling cycle is regarded as one alternative to the compressive cooling cycle. The current study examines the performance of a beta Stirling refrigerator with a cylinder with different bores. Bores differ in terms of the diameters of the compression and expansion cylinder. The refrigerator comprises a twin shell and tube condenser, and evaporator. The evaporator and condenser tubes show an elliptical cross-section. The elliptical ratios in the evaporator and condenser (1, 0.75, 0.50, 0.25, 0.20) with a fixed cross-section area are compared. A wire mesh regenerator uses as the regenerator. The selection of the working fluid is helium. The current work prepares a spreadsheet program to overcome the reversed Stirling refrigeration cycle. The suitable dimensions of the refrigerator to obtain a high cooling load are determined. The results recommended that using tubes with elliptical cross-sections in both evaporator and condenser enhances the COP of the refrigerator by about 33% (COP = 1.3). Also, using tubes having elliptical cross-sections in both evaporator and condenser enhances the cooling load of the refrigerator by about 24% at a 0.2 elliptical ratio. Furthermore, the use of different bores of refrigerator cylinder increases the cooling load of the refrigerator by about 25% when the expansion to compression bore ratio is 1.5. Additionally, the use of different bores of refrigerator cylinder increases the COP of the refrigerator by about 40%, especially at low pressures at expansion to compression bore ratio of 2.0. The proposed refrigerator can achieve a cooling capacity of 450 W at COP = 0.9 under a charged pressure of 5 bar. Comparing the current work and earlier studies shows that the proposed refrigerator achieves a 60% improvement in cooling load at the same pressure.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号