Abstract-The paper presents a computer model and experimental results of a sub-wet bulb temperature evaporative cooling system for space cooling in buildings in hot and dry climates. The cooler uses porous ceramic materials as the wet media for water evaporation. Under selected test conditions of airflow dry bulb temperature of up to 45 o C and relative humidity of up to 50%, it was found that the supply air could be cooled to below the wet bulb temperature with a maximum cooling capacity of 280 W/m 2 of the wet ceramic surface area. It was also shown that the overall wet bulb effectiveness is greater than unity. This performance would make the system a potential alternative to conventional mechanical air conditioning systems in hot and dry regions.
Abstract-Indirect evaporative coolers are one of the most possible alternatives to conventional cooling methods for building air-conditioning. It utilizes evaporation of water to cool the air, consumes much less power, and employs no harmful refrigerants comparing to other traditional cooling cycles such as vapor compression coolers. This paper presents a mathematical model and experimental investigation of thermal performance of an indirect porous ceramic evaporative cooler with integrated heat pipe for heat transfer. It is shown that good agreement was achieved between the computer model and measured parameters of the cooling system. In the regions with hot and dry climates the system can be an environmentally friendly and energy efficient cooling system. Index Terms-Indirect evaporative cooling, heat pipe, porous ceramic, dew-point effectiveness.
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