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Optimal Working Pairs for Solar Adsorption Cooling Applications

Abstract : This article suggests a detailed comparison of 7 working pairs intended for use in solar adsorption cooling systems. The performance analysis was based on two indicators: adsorption capacity and solar coefficient of performance. Based on a reformed form of the Dubinin\textendashAstakhov equation, a 3D graph was constructed to show the adsorbate concentration in the appropriate adsorbent as a first step to determine the adsorption capacity. A MATLAB program was developed to solve the system equation to predict the solar coefficient of performance for a typical summer day in a Moroccan city Fez. It was found that maximal adsorption capacity is obtained by activated carbon fibre/methanol (0.3406 kg kg-1) followed by activated carbon/methanol (0.2565 kg kg-1) and activated carbon/ethanol (0.2008 kg kg-1). At a condenser temperature of 25 °C, with an adsorbent mass of 20 kg, and an integrated collector-reactor configuration, the couple silica gel/water for air conditioning purpose can reach an SCOP of 0.3843. Activated carbon fibre/methanol is the following more efficient couple and can be used in the different cooling applications with an SCOP ranging from 0.1726 to 0.3287. Furthermore, adequate indicators are evaluated addressing the economic, environmental and safe aspects associated with each working pair.
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Submitted on : Wednesday, June 12, 2019 - 12:00:22 PM
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A. Allouhi, Tarik Kousksou, A. Jamil, T. El Rhafiki, Y. Mourad, et al.. Optimal Working Pairs for Solar Adsorption Cooling Applications. Energy, 2015, 79 (C), pp.235-247. ⟨10.1016/⟩. ⟨hal-02153526⟩



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