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Thermodynamic performance evaluation of HFC refrigerants for the chiller system simulated by hot gas bypass cycle
Author
Source
ZANCO Journal of Pure and Applied Sciences
Issue
Vol. 29, Issue 5 (31 Oct. 2017), pp.30-38, 9 p.
Publisher
Salahaddin University-Erbil Department of Scientific Publications
Publication Date
2017-10-31
Country of Publication
Iraq
No. of Pages
9
Main Subjects
Abstract EN
The competitive of the building air-conditioning equipment pushes manufactures to develop and improve the performance and efficiency of their products.
This process is cost and time consuming for testing the whole units.
In this study, for the first time a modified proposed test block with hot gas bypass cycle (HGBP), based on the experimental compressor map, has been used as a model to investigate the theoretical performance of the chiller system.
The model assumes one dimensional steady state conditions and uses an experimental compressor map to predict the thermodynamic performance of the system.
A computational model, using the software program EES (EES-V8.4), in a single stage of the chiller system with HGBP cycle based on the first and second law analyses are presented for the prediction of the effects of the pressure ratio, degree of superheating and sub-cooling, condenser temperature, outdoor air temperature and humidity ratio on the exergy destruction, exergetic efficiency, gas power and coefficient of performance (COP) of the chiller system.
The performance of the implemented model with various hydrofluorocarbon (HFC) refrigerants such as R134a, R152a and R423a are compared.
The results, firstly, indicates that the modified model with applying the energy and exergy analysis works for all kind of working refrigerants including HFC refrigerants.
Secondly, the performance of the compression refrigeration system based on the experimental compressor map data to choose the right compressor can help engineers to design a high quality unit before going to design the system practically.
The results indicate that R423a has a higher coefficient of performance as compared to the rest of the refrigerants.
The developed simulation model helped to establish the strong dependence between system performances and the compressor map.
American Psychological Association (APA)
Hamakhan, Idris A.. 2017. Thermodynamic performance evaluation of HFC refrigerants for the chiller system simulated by hot gas bypass cycle. ZANCO Journal of Pure and Applied Sciences،Vol. 29, no. 5, pp.30-38.
https://search.emarefa.net/detail/BIM-795319
Modern Language Association (MLA)
Hamakhan, Idris A.. Thermodynamic performance evaluation of HFC refrigerants for the chiller system simulated by hot gas bypass cycle. ZANCO Journal of Pure and Applied Sciences Vol. 29, no. 5 (2017), pp.30-38.
https://search.emarefa.net/detail/BIM-795319
American Medical Association (AMA)
Hamakhan, Idris A.. Thermodynamic performance evaluation of HFC refrigerants for the chiller system simulated by hot gas bypass cycle. ZANCO Journal of Pure and Applied Sciences. 2017. Vol. 29, no. 5, pp.30-38.
https://search.emarefa.net/detail/BIM-795319
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 38
Record ID
BIM-795319