点击次数：

论文类型：期刊论文

发表时间：2016-08-25

发表刊物：APPLIED THERMAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：107

页面范围：207-217

ISSN号：1359-4311

关键字：Wave rotor; Refrigerator; Shock wave; Expansion wave; COP

摘要：The port width and the offset between them are important structure parameters of a wave rotor refrigerator (WRR). The arrangement of ports decides the wave diagram in the wave rotor, which has a huge influence on the WRR performance. Designing a wave rotor mainly focuses on predicting the behavior of shock and expansion waves in wave rotor channels. This paper first presents an analytical design procedure for the pressure exchanger refrigerator, also known as WRR, to afford a theoretical port arrangement of the WRR rapidly. Then, the analytical design results are used as initial numerical model for CFD calculation. Based on the numerical simulation results, the port arrangements can be optimized. Charts and explanations are presented for the optimum design. Furthermore, a series of experiments were conducted to investigate the WRR performance under the optimized port sizes and offset. The results suggest that the COP of the system greatly changes with the geometrical arrangements. The highest COP of the system may be reduced by 41.8% with improper port widths or positions. The analysis of the WRR refrigeration system performance has revealed that expansion efficiency can be adversely affected by the compression efficiency, which means the improved WRR system have a great resistance to the working condition of volatility. (C) 2016 Elsevier Ltd. All rights reserved.