Performance evaluation of multi-stage, multi-bed adsorption chiller employing re-heat scheme

• Published in: Renewable energy 2008, Vol.33 (1), p.88-98
• Main Authors: Khan, M.Z.I., Alam, K.C.A., Saha, B.B., Akisawa, A., Kashiwagi, T.
• Format: Article
• Language: English
• Subjects: Adsorption; Air conditioning; Applied sciences; Coefficients; Cooling; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Flow rate; Fluid flow; Re-heat scheme; Refrigerating engineering; Refrigerating engineering. Cryogenics. Food conservation; Refrigeration installations; Renewable energy; Renewable energy utilization; Silica gel/water; Thermal capacitance ratio; Three-stage chiller; Waste heat
• ISSN: 0960-1481; 1879-0682
• DOI: 10.1016/j.renene.2007.01.012

This paper deals with the performance investigation of a silica gel/water-based multi-stage, multi-bed, six-bed adsorption chiller employing re-heat scheme. The innovative chiller is powered by waste heat or renewable energy sources of temperature between 50 and 70 °C along with a coolant of inlet temperature at 30 °C for air-conditioning purpose. The performance of the six-bed adsorption chiller using re-heat scheme is compared with that of the six-bed chiller without re-heat. With the same operating conditions, such as the heat transfer fluid inlet (HTF) temperatures, HTF flow rates, adsorption/desorption cycle time and same chiller physical dimension, it is found that both the cooling capacity (CC) and the coefficient of performance (COP) of the three-stage chiller with re-heat scheme are superior than those of the three-stage chiller without re-heat scheme.