Renew. Energy Environ. Sustain.
Volume 8, 2023
|Number of page(s)||18|
|Published online||17 August 2023|
Thermal performance analysis of near infra-red reflection and green roof cooling techniques on buildings made of mild steel
Department of Mechanical Engineering in Sustainable Energy; Pan African University Institute of Basic Sciences Technology and Innovation, Kenya
2 Department of Mechanical Engineering, Jomo Kenyatta University of Agriculture and Technology, Kenya
3 Department of Agricultural and Biosystem, Jomo Kenyatta University of Agriculture and Technology, Kenya
* e-mail: email@example.com
Received in final form: 19 May 2023
Accepted: 12 July 2023
This paper investigates the thermal performance of green roofs, cool roofs, and their combined effects in tropical climates. Although each technology has been studied independently for its potential to reduce cooling energy consumption in buildings, their combined effects have not been thoroughly examined in tropical climates. The study employed experimental and numerical methods, demonstrating that combining green and cool roofs can lead to even greater cooling energy savings. The research involved fabricating four identical cubicles made of mild steel sheets and placing them in an open space for testing under two operational conditions: closed window and open window/door. The combined green and cool roof technology achieved a temperature difference reduction of 4.14 °C compared to the original roof under the closed window and door state, with green and cool roofs achieving 0.72 °C and 0.79 °C, respectively. Combining green and cool roofs led to even more significant cooling energy savings, with 53.57 kWh energy savings compared to 20.1 kWh and 3.68 kWh for combined, green, and cool cubicles, respectively. The study found that combining green and cool roofs led to even more significant cooling energy savings, with 53.57 kWh energy savings compared to 20.1 kWh and 3.68 kWh for combined, green, and cool cubicles, respectively. The research suggests that combining these technologies can lead to greater cooling energy savings and highlights the potential benefits of green and cool roofs for tropical climates.
Key words: Green roof / cool roof / tropical climate / EnergyPlus
© N.P. Mdlalose et al., Published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.