الفهرس 
Energy and Water crisisOnly 14 pages are availabe for public view
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Abstract
There is a rapid growing interest in using adsorption cooling and desalination systems as a promising technology to provide an environmentally friendly single alternative that can be driven by sustainable energy and replace simultaneously two of the most power consuming devices; air-conditioners and thermal desalination plants. However, the present designs of such adsorption systems suffer of poor heat transfer rates in their core components (the adsorbent beds) which adversely affects the mass transfer as well. This weakness impedes the energy conversion efficiency at the overall system level and negatively influences the water production and cooling effect performance indicators. The present study numerically investigates for the first time, the overall enhancement of adsorption cooling cum desalination system while employing the emerging copper foamed adsorption beds coated with two advanced and promising adsorbent materials with high effective uptake to foster the thermal response of the sorption beds. The adsorbent materials used are zeolite-based material Silicoaluminophosphate (SAPO-34) and Nickel-based metal-organic framework CPO-27(Ni). A 2-D axisymmetric computational fluid dynamic fully coupled model that links the adsorption beds with the evaporator and the condenser with more realistic boundary conditions is developed. The influences of the copper foam thicknesses of both materials while changing various operating conditions such as the cycle time and the temperature of regeneration, cooling, and chilled water streams are investigated at the overall system level. The regeneration temperature is changed from 70 to 100 °C which is the temperature out of the most common solar collectors. The temperature of the cooling water is ranged from 25 to 40 °C to represent the change from mild to hot weather. Also, the temperature range for the chilled water is from 11 to 17 °C which is suitable for air-conditioning applications. Changing the metal foam thickness from 2 to 15 mm has a significant enhancement on the coefficient of performance for both materials. The regeneration temperature is the most influential parameter on the systems performance within the investigated range (70-100 °C). While increasing the inlet cooling water temperature from 25 to 40 °C affects adversely all the performance indicators for both materials. Interestingly, the chilled water inlet temperature has a marginal effect on the system performance indicators for both investigated materials while changing it from 11 to 17 °C which gives the potential f using both materials at wide range of operation. The advanced adsorption kinetics of SAPO-34 enables shortening the cycle time from 600 to 180 s which leads to increasing the specific cooling power, specific daily water production, and specific volumetric power by 223, 228, and 223 % respectively compared with the results at 600 s cycle time at 2 mm foam thickness. Also, shortening the cycle time II enhances the performance of CPO-27(Ni) by 42 % for specific cooling power, 43 % for the specific daily water production, and 42 % for the specific volumetric power.