Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof

Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof

Green envelope strategies are a passive cooling technique adopted to lessen surfaces temperature due to the heat capacity storage of vegetation lower than the other structure materials. This research assesses the green façades and green roofs to rate heat transfer through building envelopes and cool...

Full description

Saved in:
Bibliographic Details
Main Author: Abass Younis, Fatma Hussien
Format: Thesis
Language:English
English
English
Published: 2021
Subjects:
TA Engineering (General)
Civil engineering (General)
Online Access:http://eprints.uthm.edu.my/8416/1/24p%20FATMA%20HUSSIEN%20ABASS%20YOUNIS.pdf
http://eprints.uthm.edu.my/8416/2/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/8416/3/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20WATERMARK.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-uthm-ep.8416
record_format uketd_dc
spelling my-uthm-ep.84162023-02-26T07:12:38Z Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof 2021-12 Abass Younis, Fatma Hussien TA Engineering (General). Civil engineering (General) Green envelope strategies are a passive cooling technique adopted to lessen surfaces temperature due to the heat capacity storage of vegetation lower than the other structure materials. This research assesses the green façades and green roofs to rate heat transfer through building envelopes and cooling load. The research used the Overall Thermal Transfer Value (OTTV) index to calculate the thermal performance of selected case studies and developed computational workflows. Moreover, the Green Building Studio simulated the annual energy consumption through bare and vegetated envelopes scenarios. Three tropical species climbers, Hedera Helix, AntigononLeptopus, and Lonicera Japonica, were chosen to assess the thermal impact of a green façade applied to a bare opaque wall. In comparison, the green roof's lawn was limited to a single variety (Cow grass). The results indicated that the Hedera Helix climber's thermal performance was superior to the other climbers. The implementation of green façade and green roof reduced OTTV and steady-state heat gain of roofs of case study buildings by 19 % and 90%, respectively. Thus, the overall annual and monthly energy consumption reduction achieved by 11% and 14%, respectively; in parallel, the annual carbon dioxide (CO2) emissions from energy consumption dropped to 13%. On the other hand, the correlation between the annual cooling loads and corresponding OTTV for residential buildings revealed a strong relationship between the annual cooling load and the OTTV amount. Regarding the validation of the developed OTTV computational workflow, it was found that tolerance between the proposed systems and the manual calculation is approximately 0% to 2.17 % within the acceptable range. In conclusion, green facades and roofs help reduce the U-value of the building’s envelope, reduce heat transfer and lower cooling loads, carbon dioxide (CO2), and electricity costs. A simple and flexible approach to calculating the total heat transfer value (OTTV) and the proposed U-value with little human error and immediate results when determining the average heat transfer into a building. 2021-12 Thesis http://eprints.uthm.edu.my/8416/ http://eprints.uthm.edu.my/8416/1/24p%20FATMA%20HUSSIEN%20ABASS%20YOUNIS.pdf text en public http://eprints.uthm.edu.my/8416/2/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/8416/3/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Awam dan Alam Bina
institution Universiti Tun Hussein Onn Malaysia
collection UTHM Institutional Repository
language English
English
English
topic TA Engineering (General)
Civil engineering (General)
spellingShingle TA Engineering (General)
Civil engineering (General)
Abass Younis, Fatma Hussien
Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
description Green envelope strategies are a passive cooling technique adopted to lessen surfaces temperature due to the heat capacity storage of vegetation lower than the other structure materials. This research assesses the green façades and green roofs to rate heat transfer through building envelopes and cooling load. The research used the Overall Thermal Transfer Value (OTTV) index to calculate the thermal performance of selected case studies and developed computational workflows. Moreover, the Green Building Studio simulated the annual energy consumption through bare and vegetated envelopes scenarios. Three tropical species climbers, Hedera Helix, AntigononLeptopus, and Lonicera Japonica, were chosen to assess the thermal impact of a green façade applied to a bare opaque wall. In comparison, the green roof's lawn was limited to a single variety (Cow grass). The results indicated that the Hedera Helix climber's thermal performance was superior to the other climbers. The implementation of green façade and green roof reduced OTTV and steady-state heat gain of roofs of case study buildings by 19 % and 90%, respectively. Thus, the overall annual and monthly energy consumption reduction achieved by 11% and 14%, respectively; in parallel, the annual carbon dioxide (CO2) emissions from energy consumption dropped to 13%. On the other hand, the correlation between the annual cooling loads and corresponding OTTV for residential buildings revealed a strong relationship between the annual cooling load and the OTTV amount. Regarding the validation of the developed OTTV computational workflow, it was found that tolerance between the proposed systems and the manual calculation is approximately 0% to 2.17 % within the acceptable range. In conclusion, green facades and roofs help reduce the U-value of the building’s envelope, reduce heat transfer and lower cooling loads, carbon dioxide (CO2), and electricity costs. A simple and flexible approach to calculating the total heat transfer value (OTTV) and the proposed U-value with little human error and immediate results when determining the average heat transfer into a building.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Abass Younis, Fatma Hussien
author_facet Abass Younis, Fatma Hussien
author_sort Abass Younis, Fatma Hussien
title Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
title_short Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
title_full Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
title_fullStr Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
title_full_unstemmed Thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
title_sort thermal performance improvement for residential buildings in the tropics through the application of green façade and green roof
granting_institution Universiti Tun Hussein Onn Malaysia
granting_department Fakulti Kejuruteraan Awam dan Alam Bina
publishDate 2021
url http://eprints.uthm.edu.my/8416/1/24p%20FATMA%20HUSSIEN%20ABASS%20YOUNIS.pdf
http://eprints.uthm.edu.my/8416/2/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/8416/3/FATMA%20HUSSIEN%20ABASS%20YOUNIS%20WATERMARK.pdf
_version_ 1776103340560613376

Similar Items