22 May 2002
The use of waste heat of low temperatures is an important problem from the environmental considerations. Despite the advent of the micro-turbines and the fuel-cells systems, the adsorption cycles is deemed to have a distinctive advantage over these systems because of their ability to produce cooling by using low temperature waste heat and also being absolutely benign for the environment. With a novel design, the range of outlet and inlet temperatures of hot water is 80 to 50?, respectively, where the heat recovery can be maximized. Thus, there is needed to develop such adsorption chillers for the above-mentioned objectives. The 4-bed adsorption chiller is one such chiller that can be adapted to a large heat recovery, namely a larger temperature difference as 20? between the heat input and outlet. In addition, the multi-bed chiller delivers a steady cooling rate at a high coefficient of performance (COP) and yet with minimal peak temperature oscillation when compared to a conventional 2-bed chiller. This paper presents the performance testing of a prototype 4-bed adsorption chiller with a cooling capacity of 5 RT when supplied with a heat source of 80? and an estimated cooling COP larger than 0.6.