The Role of MASWH in Rooftop Temperature Regulation: An Analysis of Attic and Room Temperatures

Abstract

In this study, the efficacy of the Mixed Asphalt Solar Water Heater (MASWH) integrated on rooftops was systematically assessed for its role in reducing indoor heat gain. Two identical structures, each measuring 1m×1m×1m, were employed: one incorporated the MASWH, while the other served as a control. The MASWH was characterized by dimensions of 0.05m in thickness, 0.5m in width, and 1m in length, and was affixed to a roof inclined at 30°. Data analysis revealed a notable temperature reduction in the MASWH-fitted structure: a decrease of 3°C in the attic and 4°C in the room. This reduction represented a 7–10% decrease in overall ambient temperature. Additionally, when evaluating heat gain efficiency, the structure equipped with MASWH surpassed the control by 5–12 Wm⁻². Water within the system reached a temperature peak of 52.8°C. The findings underscore the MASWH's potential as an innovative solution to heat transfer challenges. Economically, the system presents a viable option with a payback period of merely 2.5 years, underscoring its practicality in real-world applications.