| Adsorption cooling system(ACS)has become one potential alternative of vapor compression system as it can be driven by low-grade heat(e.g.solar energy and industrial waste heat)using water or alcohols as working fluids.However,the application of ACS is limited by the drawbacks including low COP(coefficient of performance)and unfavorable discontinuity.One major solution to improve the COP of ACS is using high performance adsorbent-working fluid working pairs.The promising adsorbents of ACS require high uptakes and excellent stability.Metal-Organic Frameworks(MOFs)have won increasing research interest due to their outstanding adsorption performances.In order to investigate the performance of MOFs-based ACS,this work chosen three potential Zr-MOFs,i.e.UiO-66,UiO-67 and NU-1000 as adsorbents using water and ethanol as working fluid.Numerical simulation of the cooling performances of these six working pairs were performed.The results revealed that importance of structure and adsorption properties of MOFs on the cooling performance of ACS and the effects of desorption temperature and evaporation temperature on the cooling performances were clarified.Moreover,the effects of various working conditions on the cooling performances of various working pairs of ACS were also investigated.The investigations were performed based on a dynamic Simulink model of adsorption cooling system,which provides theoretical insights into the potential use of MOFs in ACS system. |
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