Porous polypropylene produced by phase separation for high solar reflectivity and passive cooling DOI Creative Commons
Csenge Vámos, Tamás Bárány,

Botond Béla Marosfői

и другие.

Journal of Thermal Analysis and Calorimetry, Год журнала: 2024, Номер 149(19), С. 10851 - 10863

Опубликована: Фев. 24, 2024

Abstract Passive cooling techniques have gained widespread use in everyday life and various industries by utilizing sunlight reflection to cool objects without requiring additional energy input. Porous polymer materials possess the unique ability provide both thermal insulation solar due their inherent multiphase structure. In this study, we developed a porous polypropylene (PP) with hierarchically structured surface layer using simple efficient solvent treatment method based on recrystallization. As result, structure significantly increase reflectance from 11 86%. We found that manipulating recrystallization process reflective additives, reflectivity can be further improved. With of TiO 2 BaSO 4 90% was achieved, while 93% achieved nucleating agents. practical terms, these improvements result significant temperature reductions performance tests compared extruded PP sheets: 17, 19, 22 °C for PP, PP/TiO or PP/BaSO , nucleated respectively. The modification introduced could help offer new possibilities developing low-cost chemically resistant thermally insulating layers management applications.

Язык: Английский

Energy, economic and environmental benefits of integrating passive design strategies into buildings: A review DOI
Y. Elaouzy, A. El Fadar

Renewable and Sustainable Energy Reviews, Год журнала: 2022, Номер 167, С. 112828 - 112828

Опубликована: Авг. 9, 2022

Язык: Английский

Процитировано

112

Envelope design for low-energy buildings in the tropics: A review DOI Creative Commons
Vallary Gupta, Chirag Deb

Renewable and Sustainable Energy Reviews, Год журнала: 2023, Номер 186, С. 113650 - 113650

Опубликована: Авг. 24, 2023

The building sector accounts for over one-third of global energy consumption and a significant share carbon emissions. Improving efficiency, particularly in the tropics, where most future development is foreseen, thus crucial. One main factors that determine performance envelope. This paper presents comprehensive review impact several envelope design variables, such as thermal, optical, physical, geometrical, on buildings tropics. A correlational analysis elaborates effectiveness each these measures discussed detail. findings indicate insulation, glazing properties, Window-to-wall ratio (WWR) are promising solutions improving efficiency tropical buildings. Among these, insulating has savings. variables orientation thermal mass materials have least influence total consumption. latter exhibits complex effects regions characterized by hot-humid climates. An optimized cooling-dominated climates should large aspect ratio, higher WWR north south facades, an ideal shading system. With all combined appropriate ventilation, can save 35% annual up to 60% some cases. study further reveals available research effect shape context surrounding built environment remains limited.

Язык: Английский

Процитировано

49

A novel smart framework for optimal design of green roofs in buildings conforming with energy conservation and thermal comfort DOI Creative Commons
Seyedehniloufar Mousavi, Mohammad Gheibi, Stanisław Wacławek

и другие.

Energy and Buildings, Год журнала: 2023, Номер 291, С. 113111 - 113111

Опубликована: Апрель 27, 2023

The rise in greenhouse gas emissions cities and the excessive consumption of fossil energy resources has made development green spaces, such as roofs, an increasingly important focus urban areas. This study proposes a novel smart energy-comfort system for roofs housing estates that utilises integrated machine learning (ML), DesignBuilder (DB) software Taguchi design computations optimising roof operation buildings. optimisation process maximises conservation thermal comfort buildings effective parameters including Leaf Area Index (P1), leaf reflectivity (P2), emissivity (P3), stomatal resistance (P4). optimal solutions can result 12.8% increase hours 14% reduction compared to base case. ML analysis revealed adaptive network-based fuzzy inference is most appropriate method predicting Energy-Comfort functions based on parameters, with correlation coefficient greater than 97%. framework offers innovative approach achieving

Язык: Английский

Процитировано

48

Advancing sustainable building through passive cooling with phase change materials, a comprehensive literature review DOI Creative Commons
Mehrdad Ghamari, Chan Hwang See, David Hughes

и другие.

Energy and Buildings, Год журнала: 2024, Номер 312, С. 114164 - 114164

Опубликована: Апрель 16, 2024

Phase Change Materials (PCMs) present cutting-edge technology with substantial promise for advancing sustainable and energy-efficient cooling in buildings. These materials can absorb release latent heat during phase transitions, facilitating thermal energy storage temperature regulation. This comprehensive literature review explores various strategies methods implementing passive PCMs The integration of enhances multiple approaches, including solar control, ground cooling, ventilation-based dissipation, radiative mass-based modulation. analysis delves into PCM classifications, encapsulation techniques, melting enthalpies, diverse building envelopes, performance across different climates. findings from this indicated that walls introduce a 2-hour delay transfer mitigate external fluctuations. Windows equipped panels reduce by 66 %. Combining nocturnal leads to interior surface reductions exceeding 13 °C. Natural ventilation results notable savings up 90 % hot combination free reduces charging times 35 while enhancing transfer. Simulations performed the open suggested strategic placement lightweight flux overall consumption. Despite facing challenges related scalability, compatibility, reliability, recycling, solutions demonstrate robust potential. When integrated thoughtfully design, significantly improve efficiency. Experimental validations confirm ranging 14 %, underscoring adaptability techniques leveraging capabilities

Язык: Английский

Процитировано

29

Experimental study of indoor light/thermal environment with spectrally selective windows using ATO nanofluids in winter DOI
Chunxiao Zhang, Chao Shen, Yingbo Zhang

и другие.

Energy and Buildings, Год журнала: 2022, Номер 278, С. 112597 - 112597

Опубликована: Окт. 26, 2022

Язык: Английский

Процитировано

43

Numerical analysis on the energy performance of the PCMs-integrated thermochromic coating building envelopes DOI
Ru Ji, Xiang Li

Building and Environment, Год журнала: 2023, Номер 233, С. 110113 - 110113

Опубликована: Фев. 18, 2023

Язык: Английский

Процитировано

30

A novel method to evaluate phase change materials' impact on buildings' energy, economic, and environmental performance via controlled natural ventilation DOI
Abrar Ahmad, Shazim Ali Memon

Applied Energy, Год журнала: 2023, Номер 353, С. 122033 - 122033

Опубликована: Окт. 27, 2023

Язык: Английский

Процитировано

24

Multi-objective optimization of energy and daylight performance for school envelopes in desert, semi-arid, and mediterranean climates of Iran DOI
Maryam Talaei, Hamed Sangin

Building and Environment, Год журнала: 2024, Номер 255, С. 111424 - 111424

Опубликована: Март 19, 2024

Язык: Английский

Процитировано

16

Use of passive cooling techniques and super cool materials to minimize cooling energy and improve thermal comfort in Brazilian schools DOI Creative Commons

Camila Machado de Azevedo Correia,

Cláudia Naves David Amorim, M. Santamouris

и другие.

Energy and Buildings, Год журнала: 2024, Номер 312, С. 114125 - 114125

Опубликована: Апрель 26, 2024

Standardized replicable buildings can cause discomfort and increased air conditioning usage. Besides, super cool coatings are effective passive solutions. Therefore, this study evaluates thermal comfort in a standardized Brazilian public school 8 climates, verifies suitable identifies optimal additional techniques to meet regulatory requirements without active conditioning, topic worthy of investigation. Methods include pilot simulations with DesignBuilder, analysis considering ASHRAE 55 adaptive model; JEA Algorithm optimization simulations; identification most influential strategies by sensitivity analyses; evaluation the ideal opaque envelope through heat balance. Results showed that current model do not normative. Thus, different recommended: thermochromic for heating-dominated; spectrally selective cooling-dominated dry high broadband emissivity extreme-cooling-dominated humid zones. Regarding envelope, mass flat roofs insulated walls advised. In 7 roof was followed natural ventilation. Optimal combinations window shading ventilation 24 hours days week 95 % free-aperture zones; roofs, medium reflectivity 5 cooling-dominated; dark during occupancy heating-dominated.

Язык: Английский

Процитировано

14

Low-carbon urban–rural modern energy systems with energy resilience under climate change and extreme events in China—A state-of-the-art review DOI
Yuekuan Zhou

Energy and Buildings, Год журнала: 2024, Номер 321, С. 114661 - 114661

Опубликована: Авг. 10, 2024

Язык: Английский

Процитировано

14