Effects of Operating Conditions on the Ejector Characteristics and Heat Exchanger Size of Refrigeration System

Authors

  • Chayarnon SAENGMANEE Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190
  • Kulachate PIANTHONG Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190
  • Wirapan SEEHANAM Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190
  • Thanarath SRIVEERAKUL Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190

Keywords:

Ejector, steam, waste heat, refrigeration, heat exchanger size

Abstract

This study aims to investigate the operating condition effects on the characteristics of steam ejector refrigeration systems, the heat exchanger (evaporator and condenser) sizes, and the system performance. A mathematical model that co-operates with the engineering design is developed to analyze the relationships among the operating conditions, the component sizes and the system performance. A trailed system with a refrigeration capacity of 3.5 kW and operating condition ranges of 120 - 150 °C for the generator temperature, 30 - 40 °C for the condenser temperature and 5 - 10 °C for the evaporator temperature is chosen as a model case. The working fluid or the refrigerant is water (steam). In this study, it is found that varying the operating conditions strongly affects the required ejector, evaporator, and condenser sizes. The relationships obtained from this study can be used as a guideline to design an ejector refrigeration system. In addition, four different systems are analyzed to demonstrate the selection criteria for the design procedure.

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Author Biographies

Chayarnon SAENGMANEE, Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190

Department of Mechanical Engineering

Kulachate PIANTHONG, Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190

Department of Mechanical Engineering

Wirapan SEEHANAM, Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190

Department of Mechanical Engineering

Thanarath SRIVEERAKUL, Department of Mechanical Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190

Department of Mechanical Engineering

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Published

2016-01-09

How to Cite

SAENGMANEE, C., PIANTHONG, K., SEEHANAM, W., & SRIVEERAKUL, T. (2016). Effects of Operating Conditions on the Ejector Characteristics and Heat Exchanger Size of Refrigeration System. Walailak Journal of Science and Technology (WJST), 14(2), 83–106. Retrieved from https://wjst.wu.ac.th/index.php/wjst/article/view/1913

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Research Article