الفهرس 
الفصل الاولOnly 14 pages are availabe for public view
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Abstract
Solar adsorption cycles for air conditioning systems have recently attracted much attention. They have some important advantages that help in reducing greenhouse gas emissions. The present work presents the design and techno-economic analyses for silica gel/water solar adsorption refrigeration systems. The current thesis deals with the numerical study of refrigeration systems using silica gel and water with Simulink. A case study was also presented to model the adsorption chiller with several cooling load capacities ranging from 10 tons of refrigeration (TR) to 100 TR. The simulation output results include the temperature of the desorber, the temperatures of chilled water and hot water, condenser and evaporator, the refrigerant and silica gel mass, the area, the cost, mass flow rate, and thermal power for all parts in the system. Based on the system design, it can be concluded that the simulation model appeared more flexible to feed the system components with the necessary requirements quickly and tested faster. The theoretical results showed that the cost of the system and the mass of the silica gel were 20,708.4$ and 2,266 kg, respectively, for the 10TR cooling load, while for the 100TR cooling capacity, it was 189,169.6$ and 22,667 kg, respectively. The theoretical results also showed that when the cooling load increased from 10TR to 100TR, the area of the condenser, evaporator, bed, and collector increased, and the mass flow rate of the collector, condenser, chilled water, and the cooling circuit increased with a percentage increase of 900%.This study presents a theoretical study for the performance evaluation of a silica gel/water adsorption refrigeration system. The study was conducted on a Simulink matlab model of an adsorption system with one TR capacity of 3.5 kW. Several parameters are studied to find out the effect of the ambient air temperature, the collector water outlet temperature, the collector area, and the collector mass flow rate on the collector efficiency, the collector thermal power, the bed thermal power, the collector water inlet temperature, the bed outlet adsorbate temperature, the condenser output adsorbate temperature, the thermal evaporator power, Specific Cooling Power (SCP) and Coefficient of Performance (COP) for different seasons of the year. It was found that the system performance increased with increasing the ambient temperature and the collector area, while the system’s performance decreased with decreasing the collector output temperature for the previously mentioned studied parameters. The results showed that the highest COP at the ambient air temperature of 30 °C, the collector output temperature of 75 °C, the area collector of 14 m2 , and the collector mass flow rate of 1.4 kg/s were 0.68, 0.68, 0.81, and 0.57 respectively. Also, it was found that the highest SCP at the ambient air temperature of 30 °C, the collector output temperature of 75 °C, the area collector of 14 m2 , and the collector mass flow rate of 1.4 kg/s were 345 W/kg, 355 W/kg, 626 W/kg, and 203 W/kg, respectively.