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.
Highlights
Today, the development of industrialization and technology has brought many advantages, such as efficient production, cheaper price and improved quality of life
The global warming being the threat of climatic change, efficient usage of energy sources and greenhouse-gas (GHG) emissions based on fossil energy consumption have become most attractive issues in the present decade [1]
An ideal automobile air-conditioning (AAC) system reduces temperature and humidity which can impact on our thermal comfort and air quality
Summary
The development of industrialization and technology has brought many advantages, such as efficient production, cheaper price and improved quality of life. Thermodynamic analysis of bus air conditioner working with refrigerant R600a was performed. Standard inter-city bus AC system components are compressor, evaporator, expansion valve and condenser.
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