State-of-the-Art Review – Effects of Using Cool Building Cladding Materials on Roofs

Published: July 4, 2024

Cool roofs are roofing systems designed to reflect significant solar radiation, reducing heat absorption and subsequent cooling energy demands in buildings. This paper provides a comprehensive review of cool roof technologies, covering performance standards, material options, energy-saving potential, hygrothermal considerations. The examines provisions current codes which specify minimum requirements for reflectance, thermal emittance, reflectance index (SRI) values. These criteria often vary based on factors like slope, climate zone, building type. Different materials explored, including reflective paints coatings that can be applied existing as cost-effective solutions. Several studies demonstrated the benefits roofs, showing reductions loads, indoor air temperatures, peak demand, overall consumption compared traditional roofs. However, must evaluated, especially cold climates, optimize insulation levels avoid moisture accumulation risks, reduced alter migration patterns within envelope. While provide substantial savings hot further research is needed validate modeling approaches against real-world studies, investigate impact seasonality green spaces efficacy urban island mitigation, explore control, condensation risks humid environments.

Language: Английский

---

Evaluating Passive PCM Performance in Building Envelopes for Semi-Arid Climate: Experimental and Numerical Insights on Hysteresis, Sub-Cooling, and Energy Savings

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 111161 - 111161

Published: Oct. 1, 2024

Language: Английский

---

Performance investigations of active/passive cooling system assisted with ground source heat exchanger for a building envelope

Thermal Science and Engineering Progress, Journal Year: 2025, Volume and Issue: 59, P. 103308 - 103308

Published: Jan. 30, 2025

Language: Английский

---

Enhanced Heat Transfer and Melting of PCM in Cavities with Bimetallic Flexible Fins: Numerical Investigation

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

This study investigates numerically the effects of a bimetallic flexible fin on heat transfer and melting process liquid phase change material (PCM) within cavity. The is attached to left heated wall governing equations system model in fluid structure domains are written Arbitrary Lagrangian–Eulerian (ALE) formulation then solved by Multiphysics commercial software (COMSOL 6.1). results demonstrate that significantly enhances compared fixed fin, leading faster PCM for different values Rayleigh number. Moreover, configuration leads more uniform temperature distribution time (up 11% reduction) fin.

Language: Английский

---

Urban heat islands and energy consumption patterns: Evaluating renewable energy strategies for a sustainable future

Energy Reports, Journal Year: 2025, Volume and Issue: 13, P. 3760 - 3772

Published: March 27, 2025

Language: Английский

---

Adhesion of cool roof coatings to mudbrick and corrugated metal roofs: manual peel adhesion testing

Next research., Journal Year: 2025, Volume and Issue: unknown, P. 100362 - 100362

Published: April 1, 2025

Language: Английский

---

A Systematic Review on the Research and Development of Adaptive Buildings

Buildings, Journal Year: 2025, Volume and Issue: 15(10), P. 1593 - 1593

Published: May 8, 2025

Rapid urbanization and industrialization have led to great changes the climate, such as global warming, urban heat islands, frequent fluctuations in ambient temperature, also a large amount of building energy consumption. Adaptive provides an appropriate solution maintain low consumption under various indoor outdoor conditions therefore has increasingly gained attention recently. Yet there is no clear definition on adaptive buildings current literature often focuses envelope overlooks buildings’ mechanical system, which important part system for responding requirements conditions. This article presents systematic review research development address identified gaps. Firstly, it introduces discusses evolution concept building. Secondly, reviews technologies roof, wall window. Thirdly, investigates progress especially lighting air-conditioning systems. Lastly, demonstrates practical applications recommendations future directions buildings.

Language: Английский

---

Analysis of Heat Transfer and Melting of PCM in Cavities with Bimetallic Flexible Fins

Iranian Journal of Science and Technology Transactions of Mechanical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Language: Английский

---

Novel cool roofing technology system with sustainable design for attic temperature reduction

Ain Shams Engineering Journal, Journal Year: 2024, Volume and Issue: 15(5), P. 102706 - 102706

Published: Feb. 24, 2024

The penetration of increasing solar gain towards the building deteriorates building's thermal quality and raises cooling demand. In particular, roof receives most gain. system reformation is urged to improve system's heat capacity conserve energy. This paper introduced a novel cool roofing replace traditional system. proposed applications merged: (i) lightweight foam concrete, (ii) hollow concrete slab, (iii) white paint (iv) active reflective insulation powered by discovery was evaluated with experimental chambers exposed outdoor environment. Under intense sunlight, internal surface 30.6 % cooler (50.5 °C 35.0 °C). mean attic temperature achieved 33.9 under field where daily maximum recorded surrounding 43.0 °C. contrast bare at 41.9 °C, design demonstrated 19.2 lower gain, achieving sub-ambient structure. Besides that, demand simulation generated similar savings (20 %). Significantly, this comprehensive exhibited considerable constructive outcome in buildings sustainable development create better more environmental future for all.

Language: Английский

---

Implementing Cool Roof and Bio-PCM in Portable Cabins to Create Low-Energy Buildings Suitable for Different Climates

Sustainability, Journal Year: 2023, Volume and Issue: 15(20), P. 14700 - 14700

Published: Oct. 10, 2023

The building sector’s energy consumption has significantly increased due to climate change, emphasizing the need develop sustainable low-energy buildings using experimental and computational tools. As a joint project between Kuwait Australia, two portable cabins with internal sizes of 2 m × 2.80 m, made from 75 mm thick sandwich panels metal frames, were built in investigate their thermal power characteristics under various energy-saving techniques different climates. This is first attempt analyze aspects for future cities. Each cabin an indoor air-quality-sensing device novel power-monitoring system measure characteristics. First, shingles finned cool roof (CR) experimentally investigated. Then, new multi-zone SketchUp model was created simulated TRNSYS. Next, saving data investigated by adding PCM on walls built-in models bio-phase change materials (Bio-PCMs) annual performance index (EPI) as important sustainability explored determining heating/cooling/total demands desert regions Australia. findings reveal that both roofs contributed higher consumption. Meanwhile, use Bio-PCMs demonstrates significant potential 30%, variations ranging 25% over 45% across

Language: Английский

---