Analysis of Thermal Effects of Roof Material on Indoor Temperature and Thermal Comfort

Abstract

The indoor thermal comfort is one of the key factors in designing an energy-efficient sustainable building. In the tropics, ensuring indoor thermal comfort using air conditioning systems is the primary cause of the high energy consumption of buildings. This thermal comfort is greatly affected by the characteristics of the building envelope material, including the roof. Zinc roofing sheet is the most common roofing material used in Indonesia because of its lightweight and easy installation. However, it is corrosive, and it has a high thermal conductivity that can lead to overheating in the room. In order to improve indoor thermal comfort, it is necessary to find alternative, environmentally friendly building roofing materials. The purpose of this experimental study is to analyze and evaluate the effect of the type of roofing material on rooms' temperature profile and indoor thermal comfort level. Temperature measurements are carried out for three consecutive days on three prototype buildings with the one-twenty scale with different roofing materials: zinc plate, bamboo, and sugar palm fiber called Ijuk. In each building, four temperature sensors connected to a temperature data logger are placed at the rooftop surface, attic zone, bedroom, and living room. The measurement results show that the type of roofing material has a significant impact on the indoor temperature profile and comfort level both day and night. Considering the thermal performance shown by the results of the study, Ijuk can be a rational choice as a roofing material for residential houses in tropical climates.

Ground-Air Heat Exchanger as Passive Cooling In Building Ventilation

“…Kenyamanan termal adalah salah satu aspek utama yang perlu dipertimbangkan dalam suatu bangunan [6]. Kenyamanan termal merupakan kondisi udara yang nyaman sehingga manusia merasakan kepuasan terhadap lingkungan [7].…”

Experimental investigation of water to air heat exchanger performance as passive cooling strategy on ventilation system in tropical region

“…This technique is a method of lowering the temperature of a building using two principles, namely minimizing heat gain from the environment and maximizing heat dissipation to the environment Several alternative passive cooling techniques that can be implemented in buildings include natural ventilation, sun protection, evaporative cooling, cooling by soil, materials, thermal stratification, etc. [13,14]. Unfortunately, the current architectural design of buildings in Indonesia has not maximally adopted passive cooling techniques to increase the thermal comfort of the room [15].…”

Numerical Analysis of Air-Water Heat Exchanger as Passive Cooling System in Air Ventilation

“…This technique is a method of reducing the temperature of a building by using two principles, namely minimizing heat gain from the environment and maximizing heat dissipation to the environment. Some alternative passive cooling techniques that can be applied to buildings include natural ventilation, sun protection, evaporative cooling, cooling by soil, materials, thermal stratification (Lapisa & Romani, 2020). Therefore, savings are made by using a heat transfer device as a passive cooler on air vents.…”