Abstract

 The work of this paper is an investigation to improve the condenser performance of the automobile air conditioning system by enhancing the air-side heat transfer from the condenser through the use of an air guide net installed in front of the condenser face which is basically an aluminum plate having a circular entrance shape for the air passage. The A/C system was examined under two types of test. The first test was conducted the air guide net, while the second was done with the air guide net. The performances of the A/C system under these tests were compared. For the second type of test, the experiment was carried out with three different size of air guide net, three different circular diameters (2, 3 and 3.5 cm) and a common air passage area. The effect of varying the size of the air guide net and its inclination angle was investigated. The experimental work included five inclination angles (0o, 5o, 10o, 15o and 20o). It was found that the presence of the air guide net caused an improvement in the performance of the A/C system for all sizes and inclination angles. In addition, the electrical energy consumed by the A/C system without the air guide net was calculated and compared to those obtained for the A/C system with the air guide net. The results manifested that the reduction of the power consumption was enhanced by operating the A/C system with the air guide net.
Highlights
Refrigeration systems are widely used in commercial buildings, offices, airport, and hospital and in automobiles
The actual performance of the automotive air conditioning system is a result of the balancing among the essential cycle components when the performance of any above components of the air-conditioning system varies as a result of one or more effecting factors, and this will reflect on the performance of the other component of the A/C system
When the air side heat transfer coefficient varies, it affects the performance of the condenser, which in turn affects the performance of the other components of the A/C system
Summary
Refrigeration systems are widely used in commercial buildings, offices, airport, and hospital and in automobiles. Automobile air conditioning system is the biggest auxiliary load on the vehicle engine (internal combustion engine cars). It consumes a large amount of energy up to 30% of the fuel. Some significant characteristics that effect on the performance of the automotive A/C system more are complicated than the other A/C systems, Bhatti [2]; and Kiatsiriroat, and Euakit. One of the effecting factors on the performance of the condenser component is the air side heat transfer coefficient. When the air side heat transfer coefficient varies, it affects the performance of the condenser, which in turn affects the performance of the other components of the A/C system
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