Thermodynamic Analysis of an Intercity Bus Air-Conditioning System Working with HCFC, HFC, CFC and HC Refrigerants

Year 2019, Volume: 8 Issue: 1, 29 - 43, 20.05.2019

Mehmet Bilgili Ediz Cardak Arif Emre Aktas Firat Ekinci

https://doi.org/10.18245/ijaet.490002

Abstract

The purpose of this
study is to perform thermodynamic analysis of an intercity bus air-conditioning
(ICBAC) system working with hydrochlorofluorocarbon (HCFC), hydrofluorocarbon
(HFC), chlorofluorocarbon (CFC) and hydrocarbon (HC)
refrigerants. For this aim, an intercity bus
with a busload of 56 passengers, which is thought to motion in the Adana
province of Turkey, was selected. R404A, R410A, R502, R507, R22, R290, R134a,
R500 and R600a were selected as different HCFC/HFC/CFC/HC refrigerant types in
the ICBAC system. Useful and reversible works of compressor, coefficient of
performance (COP), exergy efficiency and exergy destructions of the entire
ICBAC system and its each sub-unit were obtained. The results showed that the
performance of the ICBAC system was significantly influenced by changing the
refrigerants. However, R600a refrigerant based on hydrocarbon was found as a
refrigerant to have minimum total exergy destruction, maximum exergy efficiency
and maximum COP compared to other refrigerants used in the ICBAC system with
the same amount of cooling load and the same climatic condition.

Keywords

Air-conditioning, Refrigerants, Air mixing ratios (MR), Exergy, Exergy efficiency

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