Study of Comparison Heat Energy Disposal in Hollow Roof Cooling Water Tank using Natural Material

Abstract

A cooling tank functions as a heat exchanger utilising water as the working fluid material, while air facilitates water cooling through direct contact, inducing partial water evaporation. The cooled water circulates within the hollow roof, aiming to absorb heat along its path. This paper undertakes a comparative analysis of four roof structures integrating composite layers to discern the most efficient and superior option. The assessment encompasses performance evaluation, thermal insulation properties, environmental resistance, heat absorption capability, energy efficiency, and economic feasibility of the composite layers applied to the roofs. The study aims to determine the effectiveness of the heat transfer rate within the hollow roof, ascertain the hourly energy discharge potential from the cooling water tank, and identify the requisite water flow to supply the hollow roof. Based on the experimentation, Roof 3 exhibited the highest room temperature, followed by Roof 1, Roof 4, and Roof 2. Ultimately, it was observed that Roof 2 possesses a superior ability to absorb heat energy from sunlight compared to other materials.