Impact of Green Roofs and Walls on the Thermal Environment of Pedestrian Heights in Urban Villages DOI Creative Commons

Chang Lin,

Shawei Zhang

Buildings, Journal Year: 2024, Volume and Issue: 14(12), P. 4063 - 4063

Published: Dec. 21, 2024

(1) Background: Urban villages in Guangzhou are high-density communities with challenging outdoor thermal environments, which significantly impact residents’ comfort. Addressing these issues is crucial for improving the quality of life and mitigating heat stress such environments. (2) Methods: This study utilized a validated ENVI-met microclimate model to explore synergistic cooling effects roof greening facade greening. Three types—total greening, greening—were analyzed their impacts on air temperature, mean radiant physiologically equivalent temperature (PET) at pedestrian height 1.5 m under varying green coverage scenarios. (3) Results: The findings showed that total exhibited greatest potential, especially high (≥50%), reducing PET by approximately 2.5 °C, from 53.5 °C 51.0 during midday, shifting level “extreme stress” “strong stress”. Facade reduced about while had limited effect, 1.0 °C. Furthermore, exceeding 75%, achieved maximum reductions 3.0 1.2 temperature. (4) Conclusions: provides scientific evidence supporting as most effective strategy comfort urban villages, offering practical insights optimizing infrastructure.

Language: Английский

Innovative Closed Cavity Façades (CCF) with Inner Shading and Advanced Coatings for Enhancing Thermal Performance in the Tropics DOI Creative Commons
Nedhal Al-Tamimi,

Ahmad Fadel Al Kahlout,

Abdultawab M. Qahtan

et al.

Buildings, Journal Year: 2024, Volume and Issue: 14(3), P. 603 - 603

Published: Feb. 24, 2024

In its simplest terms, a closed-cavity façade (CCF) is sealed, unventilated enclosure equipped with motorized shading devices, internal double or triple glazing, and external single glazing. This technology effectively controls solar energy daylight entry into buildings. research aims to enhance the thermal efficiency of CCFs in tropical climates using Venetian blinds (VB) advanced glass coatings. EnergyPlus DesignBuilder were employed assess various CCF designs compare them glazing unit (SGU) grey was inspired by residential case study on Penang Island, Malaysia. The findings indicate that surpass SGUs performance occupant comfort, particularly Malaysia’s humid climate. reduced operating temperatures monthly percentage ranging from 33.5% 68.75% all operations. On an annual basis, temperature reductions ranged 27.5% 80.25%, maximum decreases between 2 °C 4 minimum 0.5 1 compared SGU units. results show outperform reducing 80.25% annually. Temperature at SGU. Notably, nano-coatings (83/58) low-E coatings (83/23) (Tvis/Tsol) most effective. highlights importance selecting appropriate for CCFs, demonstrates their potential enhancing interior comfort emphasize significant impact innovative technologies improving operational façades tropics.

Language: Английский

Citations

2
Impact of Green Roofs and Walls on the Thermal Environment of Pedestrian Heights in Urban Villages DOI Creative Commons

Chang Lin,

Shawei Zhang

Buildings, Journal Year: 2024, Volume and Issue: 14(12), P. 4063 - 4063

Published: Dec. 21, 2024

(1) Background: Urban villages in Guangzhou are high-density communities with challenging outdoor thermal environments, which significantly impact residents’ comfort. Addressing these issues is crucial for improving the quality of life and mitigating heat stress such environments. (2) Methods: This study utilized a validated ENVI-met microclimate model to explore synergistic cooling effects roof greening facade greening. Three types—total greening, greening—were analyzed their impacts on air temperature, mean radiant physiologically equivalent temperature (PET) at pedestrian height 1.5 m under varying green coverage scenarios. (3) Results: The findings showed that total exhibited greatest potential, especially high (≥50%), reducing PET by approximately 2.5 °C, from 53.5 °C 51.0 during midday, shifting level “extreme stress” “strong stress”. Facade reduced about while had limited effect, 1.0 °C. Furthermore, exceeding 75%, achieved maximum reductions 3.0 1.2 temperature. (4) Conclusions: provides scientific evidence supporting as most effective strategy comfort urban villages, offering practical insights optimizing infrastructure.

Language: Английский

Citations

2