Green Roofs, Vegetation Types, Impact on the Thermal Effectiveness: An Experimental Study in Cyprus

Yıldırım, Sinem; Özburak, Çimen; Özden, Özge

doi:10.3390/su15032807

Cited by 7 publications

(5 citation statements)

References 45 publications

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“…This phenomenon occurs because the substrate and drainage layers consist of organic material with high emissivity values, facilitating an extremely efficient heat transfer circulation. According to (Yildirim, Ozburak, and Ozden, 2023) and (Wang, Huang, and Li, 2021), green roof possesses the capability to provide a cooling effect on building roof through effective heat transfer circulation. A reduction in U-value becomes possible through this mechanism and green roof was intentionally designed with densely packed grass vegetation.…”

Section: Resultsmentioning

confidence: 99%

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

Machfudiyanto,

Riantini,

Rachmawati

et al. 2023

IJTech

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Wasteful consumption of electricity in high-rise building in Indonesia is the primary trigger for the increase in carbon emissions. Predominantly, the excessive use of electrical appliances and air conditioning systems is the principal factor contributing to the use of energy within these structures. To effectively address this issue, the importance lies in adopting suitable building envelope material. Therefore, this study aimed to analyze the effectiveness of different insulation types and roof covering in improving the energy-saving performance of office building. There were six proposed renovation for the flat roof of building, consisting of two approaches, namely (1) the incorporation of insulation and (2) the replacement of roof covering layers. Scenarios A1, A2, and A3 have incorporated 100 mm of polyurethane (PU) foam, polyisocyanurate (PI) foam, and fiberglass batt into the design. Meanwhile, Scenarios B1, B2, and B3 opted for ceramic material, Ethylene Propylene Diene Terpolymer (EPDM) membrane, and grass vegetation as roofing material for the existing roof. The results showed that the addition of insulation to roof through Insight 360 and the replacement of roof covering layers produced an energy reduction of 19.5% to 20.2% and 19.5% and 23.5%, respectively. The implementation of green roof in scenario B3 was selected as the most promising renovation option, achieving a remarkable 23.5% reduction in energy consumption.

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Section: Resultsmentioning

confidence: 99%

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

Machfudiyanto,

Riantini,

Rachmawati

et al. 2023

IJTech

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“…Taking advantage of the existing space on top of buildings, the integration of green roofs will support the greenIZOLA project vision of a gradual green conversion transition towards circularity and resilience in Slovakia. In order to boost these services, green roofs need to be effectively incorporated and replicated in the urban landscape [28][29][30][31].…”

Section: Discussionmentioning

confidence: 99%

“…It is argued that green roofs will play an important role in the future as they have a cooling effect on buildings, especially in urban areas [6,[31][32][33][34][35][36][37][38][39][40][41][42]. Our contribution is the first to simulate green roofs with SimStadt on a self-developed 3D building model with an adapted building physics library in Slovakia.…”

Section: Discussionmentioning

confidence: 99%

Transformation of Urban Spaces: The Impact of Green Roofs in Košice, Slovakia

Vargova,

Köhler,

Hötzel

et al. 2023

Sustainability

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The creation of the greenIZOLA Experimental Center results from a long-term collaboration between the Faculty of Civil Engineering, Technical University of Košice, and the construction company, IZOLA Košice, s.r.o. The project focuses on a four-story administrative building with four terraces and services, asphalt roads, and warehouses located in the industrial part known as Nad Jazerom, in Košice, Slovakia. This study examines the benefits of green roofs as a case study in green transformation processes. Green roofs have multiple benefits. In addition to reducing energy demands for heating and cooling through better insulation properties, green roofs can improve stormwater management and local water balances by mitigating water runoff and increasing local evaporation. They can reduce energy demands, improve stormwater management, and enhance biodiversity. The research involved comparing pre- and post-establishment data with simulations. The roof was divided into three test segments for temperature measurements throughout the year. External climatic parameters were monitored using a weather station and a pyranometer. Long-term temperature monitoring in the individual roof layers was also conducted. This data was crucial for validating the building energy demand simulation models, assessed using the SimStadt platform. The results showed a 15–40% reduction in U-values with different types of greening. The findings could encourage more widespread implementation of green roofs in Slovakia and Eastern Europe.

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“…Energy performance of simulated green roofs using leaf area index, plant height, and soil thickness [19] Extensive green roof system Sub-tropical Simulations and field measurement…”

Section: Sub-tropical Field Measurementmentioning

confidence: 99%

Strategic Integration of a Vegetative Component on a Metal Roof Base: An Evaluation of Its Impacts on Thermal and Acoustic Performance in the Tropics

Aw,

Leng,

Ling

et al. 2024

Buildings

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This paper attempts to ascertain the thermal and acoustic impacts of introducing a vegetative roof layer on insulated and uninsulated metal roofs for tropical climates, through field measurements in Skudai, Johor, Malaysia, that were conducted for both dry and wet days. Four small-scale roof modules were tested, namely an uninsulated metal roof (uiMDR), an insulated metal roof (iMDR), and two identical corresponding modules with an additional vegetative component (uiGR and iGR, respectively). Outdoor ambient temperature (Tamb) was the most influential correlated variable affecting the roof outer surface temperature (RTOS) in 50% of the assessed scenarios. On the selected dry day, the inter-quartile ranges (IQR) of iGR, iMDR, uiGR, and uiMDR were 6.21 °C, 8.32 °C, 6.69 °C, and 1.66 °C, respectively; the IQRs were 1.6 °C, 4.11 °C, 2.59 °C, and 1.78 °C, respectively, on the selected wet day. Based on design U-value calculations, iGR was better than iMDR and uiMDR for both dry and wet days. The U-value of uiGR was also better than iMDR under dry-day conditions. The Wilcoxon signed-rank test also indicated a statistically significant difference in the roof inner surface temperature (RTIS) measurements (p-value = 0.00) during Malaysian daylight hours, between 8.00 a.m. and 6.00 p.m., regardless of the weather. In terms of sound level reduction under dry-day conditions, the Kruskal–Wallis and Wilcoxon signed-rank tests showed statistically significant differences in sound level reductions, with iGR and uiGR performing better than iMDR and uiMDR (p-values = 0.00). The sound level reductions for iGR, iMDR, and uiGR were 51%, 32%, and 31%, respectively, while uiMDR experienced sound level amplifications by 6%, possibly due to the acoustic resonance effect. This proof of concept may encourage a broader application of extensive GRs in Malaysia using metal roofs, beyond the conventional RC base construction method.

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Green Roofs, Vegetation Types, Impact on the Thermal Effectiveness: An Experimental Study in Cyprus

Cited by 7 publications

References 45 publications

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

Effectiveness Analysis of Insulation and Roof Covering Material in Office Flat Roof

Transformation of Urban Spaces: The Impact of Green Roofs in Košice, Slovakia

Strategic Integration of a Vegetative Component on a Metal Roof Base: An Evaluation of Its Impacts on Thermal and Acoustic Performance in the Tropics

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