Analysis of Humidified Air Circulation Over the Air Cooled Condenser of Vapour Compression Refrigeration System with Eco Friendly Refrigerants


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Abstract


The performance behavior of vapour compression refrigeration system (VCRS) has been examined in two modes of operation namely atmospheric air circulation (AAC) and humidified air circulation (HAC) over the condensing coil at different loading conditions in the evaporator. This experimental work is carried out by using the refrigerant mixture of R290 and R600a which are eco friendly refrigerants as compared to conventional refrigerants like R12 and R134a. Humidifier unit is assembled with the existing VCRS and the mass flow rate of water supplied is maintained about 1.08 lit/sec. The various performance parameters like coefficient of performance (COP), refrigeration effect, heat rejection in the condenser and power input to the compressor are measured experimentally at different loads in the evaporator. The experimental results of the proposed investigation shows that 19.1% reduction in compressor power consumption and progressive increase in refrigeration effect & COP. COP of HAC mode is about 26.88% higher than AAC mode at 75% loading conditions.
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Keywords


Coefficient of Performance; Power Consumption; Heat Rejection; Humidifier

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