Abstract
This work is concerned with a two stages four beds adsorption chiller utilizing activated carbon-methanol adsorption pair that operates on six separated processes. The four beds that act as thermal compressors are powered by a low grade thermal energy in the form of hot water at a temperature range of 65 to 83 °C. As well as, the water pumps and control cycle consume insignificant electrical power. This adsorption chiller consists of three water cycles. The first water cycle is the driven hot water cycle. The second cycle is the cold water cycle to cool the carbon, which adsorbs the methanol. Finally, the chilled water cycle that is used to overcome the building load. The theoretical results showed that average cycle cooling power is 2.15kW, while the experimental measurement revealed that the cooling capacity of the cycle is about 1.98 kW with a relative error of % 0.02. The generator and condensing temperatures are 83 and 30 °C, respectively. The coefficient of performance (COP) of that chiller was in the range of 0.37 to 0.49. The best operating point and the best working conditions were also investigated. The present chiller is superior more than the single stage, two beds adsorption chiller that works on the activated carbon methanol pair that needs a high ambient temperature.
Highlights
Introduce renewable energy is a sustainable solution to a shortage in the fossil fuel and the environmental impact
Employing active carbon-methanol or gel-water set up as the adsorbent-refrigerant in adsorption cycles allow for these cycles to be stimulated by heat sources of near ambient or low temperature
Critoph [6] stated that the coefficient of performance (COP) of an adsorption icemaker system using charcoal/methanol pair was in the range of
Summary
Introduce renewable energy is a sustainable solution to a shortage in the fossil fuel and the environmental impact. Myat et al [3] examined the performance of a low-grade waste heat cooling system based on Zeolite adsorption. According to their results, a heat source of only 55 °C can be utilized to give a COP that reaches 0.48. The adsorption chiller suggested by Alam et al [10] utilizes a heat source that ranges from 50°C to 90 °C and is a reheat double-stage adsorption system. This system achieved a cooling temperature of 30 °C. Find the best working zone .The present work was conducted in the Labs of Millennium Energy Industries, (http:// millenniumenergy. co.uk/) Jordan
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