Abstract
This paper presents analysis aiming at assessing the feasibility and economic performance of a solar-assisted air-conditioning system for a middle class house under the climatic conditions of Tunis City. Two alternative cooling modes for the single effect water-lithium bromide absorption machine are considered, a water-cooling in association with a cooling tower and air-cooling. The numerical simulations show that for the water-cooling case, a solar system with 18 m2 of evacuated tube collector area and a thermal storage tank of 1.3 m3 maintained at a temperature of 95°C can cover 50% of the energy needs of the machine. The corresponding optimal results for the air-cooled chiller are: energy needs coverage 40%, hot water tank capacity 1 m3 at 110°C, collector area 14 m2. The annually total costs for the case of water-cooling and air-cooling are respectively 3.52 €/kWh and 2.51 €/kWh.
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