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Parameters Analysis and Potential of Energy Storage Case Study : Solar collector for diurnal water heating and nocturnal water cooling.

DOI: 10.1615/ICHMT.2000.TherSieProcVol2.50
pages 55-60

Thanakom Soontornchainacksaeng
Department of Mechanical Engineering, Faculty of Engineering King Mongkut's lnstitute of Technology North Bangkok, Bangkok 10800, Thailand

Abstract

This research used computer program to calculate the parameters analysis and potential of systems of energy storage by solar collector for diurnal water heating and nocturnal water cooling. Solar collector has surface area of 1.67 m2 with capacity of water storage tank of 60 litres/day and the average solar radiation incident on surface area of 400 W/m2.The compound parameters such as: air temperature, transmittance, absorbtance, heat transfer coefficient, collector heat removal factor were simulated by mathematic equations. During diurnal period, solar collector stored thermal energy and make temperature of water in the system increase. During the nocturnal period, solar collector releases thermal energy into sky radiation which influences solar collector as well as water in the system are cooled down. Computer simulation program approved the maximum temperature of solar collector heating system is 74.77°C and efficiency of solar collector system were observed 56% followed by 53%and 51% respectively at slope of 15 ° followed by 5° and 30°. Minimum temperature of water cooling system by sky radiation, is 0.04°C and the efficiencies of solar collector system were found 60% followed by 57% and 53% at slope of 5° followed by 15° and 30° significantly.

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