Effect of Copper Pipe Embedding at Different Depths in Asphalt Layer on Thermal Efficiency of Asphalt Solar Water Heaters
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Abstract
This paper aimed to study the effect of embedding copper pipes at different depths in asphalt layer on thermal efficiency of asphalt solar water heaters. Both solar water heaters (Type A and Type B) used in this study had a solar absorber made from mixed asphalt with the size of 0.8 m x 0.8 m covered with a glass cover. In the asphalt layer, copper pipes were embedded. For the heater Type A, only three quarters of the diameter (7.5 mm) of the copper pipes were embedded in the asphalt layer and for the heater Type B, the copper pipes were embedded 25 mm deep from the surface of the asphalt layer. From this study, it was found that the maximum temperatures of mixed asphalt and hot water were 69°C and 53.70°C, respectively, for the water heater Type A and 70.5°C and 50.4°C, respectively, for the water heater Type B. Moreover, it was also found that the water heater Type A had the maximum thermal efficiency of 80% with a daily average of 57% while the water heater Type B had the maximum thermal efficiency of 69% with a daily average of 44%. This study indicated that embedding copper pipes into the solar absorbers at different depths affected thermal efficiency of the solar water heaters.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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