Until today several models of solar water heaters (SWHs) are introduced to the market. The oldest and 1st generation of SWH in date before 1900, involving a black-painted tank mounted on a roof. The 2nd generation is flat-plate collectors used for the first time in the 1920s. The 3rd generation of SWH is evacuated tube solar collectors in few different forms of U-shape pipe, thermosiphon and heat pipe.
In 4th generation design, the system is without hot water tank storage and produce hot water instantly.
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For any inquiries, kindly contact:
Lee Ching Shya
UMCIC Business Officer University of Malaya