Ejector design and theoretical study of R134a ejector refrigeration cycle

被引：70

作者：

Khalil, A. ^{[2
]}

Fatouh, M. ^{[1
]}

Elgendy, E. ^{[1
]}

机构：

[1] Helwan Univ, Fac Engn El Mattaria, Dept Power Mech Engn, Cairo 11718, Egypt

[2] Cairo Univ, Fac Engn, Dept Power Mech Engn, Giza 12316, Egypt

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION | 2011年 / 34卷 / 07期

关键词：

R134a; Ejector; System; Design; Air conditioning; Performance; Modelling; PERFORMANCE-CHARACTERISTICS; SYSTEM;

D O I：

10.1016/j.ijrefrig.2011.01.005

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the present paper, a mathematical model is developed to design R134a ejector and to predict the performance characteristics of a vapor jet refrigeration system over a wide range of the investigated parameters. These parameters include boiling temperature (65-85 degrees C), condensing temperature (25-40 degrees C), evaporating temperature (0-10 degrees C), degrees of superheat (0-15 degrees C), nozzle efficiency (0.75-0.95) and diffuser efficiency (0.75-0.95). Simulated results showed that the present model data are in good agreement with experimental data in the literature with an average error of 6%. It is found that the ejector area ratio at boiling temperature of 85 degrees C is about double that at boiling temperature of 65 degrees C for various evaporating and condensing temperatures. The present results confirm that waste heat sources of temperature ranging from 65 to 85 degrees C are adequate to operate vapor jet refrigeration system for air-conditioning applications. (C) 2011 Elsevier Ltd and IIR. All rights reserved.

引用

页码：1684 / 1698

页数：15

共 26 条

[1] The effect of operating conditions on the performance of a supersonic ejector for refrigeration [J].