Improvement On The Domestic Solar Water Heating Design

Gan, Kok Heng (2009) Improvement On The Domestic Solar Water Heating Design. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This study is to apply solar energy as an alternative energy source since it has the big potential to be utilized on various places include in Malaysia. The objectives of this project are to study and design a domestic solar water heater. Optimum tilt angle of solar collector panel which been used in Malaysia had been found. Solar water heating is a project which uses sun energy as the power source. The thermosiphon system is used to circulate the heated water naturally by convection and the gravitational force into the solar collector panel and water storage tank. A prototype of solar water heater had been build to test it performance and feasibility for the daily usage. The optimum tilt angle which had been found in Malaysia is 15˚ face south or 15˚ face north and the S.H.O.T (Sun Hours On Tilt) is 4 to 5 kWh/m²/day. The tests that were carried out had proved that the water can been heated by solar energy from 29.3˚C to 72˚C and the water temperature at the next day morning was 32˚C. The peak time for the solar water heater to heat up the water is around the time 1300 till 1430. The calculation show that the electricity been saved by using solar water heater is 7.75 kWh for a month. The cost of making this solar water heater is RM 330. The black colour surface can increase the performance of heat absorption till 1.86˚C higher in temperature rose (for 325 ml of water) compare to the white colour surface. The solar water panel had been improved by placing 6 black aluminum absorption plates under the black copper tubes.

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