Tinnapob  Phengpom, Jirasak  Pukdum, Krichkanok  Sudasna, 
    Experimental Study on Heat Gain Reduction and Economic Evaluation
of Mixed Asphalt Solar Water Heater (MASWH),
    Journal of Engineering and Applied Sciences,
    Volume 15,Issue 1,
    2020,
    Pages 327-334,
    ISSN 1816-949x,
    jeasci.2020.327.334,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2020.327.334)
    Abstract: This study studied the Mixed Asphalt Solar Water Heater (MASWH) integrated on the roof top. This
solution can reduce ceiling heat gain into the room. Both reference house and house-integrated with
MASWH have dimension 1 m width, 1 m length and 1 m height. The MASWH has a thickness of 0.05 m, width
of 0.5 m and a length of 1 m. One house equipped with MASWH on the roof top to test in experiments while
the other house was served as reference. The roof was inclined at 30° to the horizontal. The experimental result
showed that the attic temperature and room temperature. The house-integrated with MASWH could reduce attic
temperature of 3°C and room temperature of 4°C, respectively. The percentage of room temperature decreased
in the range of 7-10%. Heat gain reduction of the house-integrated with MASWH become better than reference
house about 5-12 Wm<sup>&#150;2</sup> and the maximum of outlet water temperature was 52.8&deg;C. Obviously, installing
MASWH on the roof top can reduce heat transfer. The economic value was evaluation as the payback period
and the result showed that 2.5 years.
    Keywords: Mixed asphalt;solar water heater;heat gain reduction;thermo-economic;temperature;length