Thermodynamic Analysis of Bus Air Conditioner Working with Refrigerant R600a

Year 2017, , 69 - 75, 30.06.2017

Arif Emre Aktas , Mehmet Bilgili , Ediz Cardak

https://doi.org/10.26701/ems.321874

Cited By: 9

Abstract

Refrigerant R134a (tetrafluoroethane) is widely used
in automotive air conditioners and has a good performance. However, since
refrigerant R134a still has a high global warming potential (GWP), this
refrigerant must be replaced with environmentally friendly refrigerants such as
R600a (isobutane), which is a natural fluid, no effect on the climate,
inexpensive and readily available. In this study, thermodynamic analysis of a bus
air conditioner working with refrigerant R600a was performed. Adana province of
Turkey was chosen as the study region. Firstly, a bus used for inter-city
passenger transportation with a passenger capacity of 56 persons was selected.
Cooling Load Hourly Analysis Program (HAP) was used to determine the hourly
cooling load capacity of the selected inter-city bus model. Useful and
reversible works of compressor, coefficient of performance (COP), exergy
efficiency and exergy destructions of the bus air conditioning system were
obtained and evaluated in detail.

Keywords

Air-conditioning, refrigerant R600a, air mixing ratio, exergy, exergy efficiency, intercity bus

References

• [1] Bilgili, M., Ozbek, A., Sahin, B., Kahraman, A. (2015). An overview of renewable electric power capacity and progress in new technologies in the World. Renewable and Sustainable Energy Reviews, vol. 49, p. 323-334, DOI: 10.1016/j.rser.2015.04.148.
• [2] Chu, C.M., Jong, T.L. (2008). Enthalpy estimation for thermal comfort and energy saving in air conditioning system. Energy Conversion and Management, vol. 49, no. 6, p. 1620-1628, DOI: 10.1016/j.enconman.2007.12.012.
• [3] Weilenmann, M.F., Alvarez, R., Keller, M. (2010). Fuel consumption and CO2 pollutant emissions of mobile air conditioning at fleet level-new data and model comparison. Environmental Science and Technology, vol. 44, no. 13, p. 5277-5282, DOI: 10.1021/es903654t.
• [4] Tosun, E., Bilgili, M., Tuccar, G., Yasar, A., Aydin, K. (2016). Exergy analysis of an inter-city bus air-conditioning system. International Journal of Exergy, vol. 20, no. 4, p. 445-464, DOI: 10.1504/IJEX.2016.078094.
• [5] Hurdogan, E., Buyukalaca, O., Hepbasli, A., Yilmaz, T. (2011). Exergetic modeling and experimental performance assessment of a novel desiccant cooling system. Energy and Buildings, vol. 43, no. 6, p. 1489-1498, DOI: 10.1016/j.enbuild.2011.02.016.
• [6] TEMSA. (2016). TS45 - Training Document (Vol. 1). Adana: Temsa Ulaşım Araçları Sanayi ve Ticaret A.Ş.