Mohammed A. Almeshaal , R.Y. Sakr , Ismail M.M. Elsemary , Ahmed A. Altohamy
{"title":"采用相变材料集成在混凝土天花板上的建筑被动冷却:一项实验研究","authors":"Mohammed A. Almeshaal , R.Y. Sakr , Ismail M.M. Elsemary , Ahmed A. Altohamy","doi":"10.1016/j.est.2025.118762","DOIUrl":null,"url":null,"abstract":"<div><div>This innovative experimental study evaluated the thermal and mechanical performance of concrete ceilings enhanced with Phase Change Materials (PCMs) for passive cooling in a simulated desert climate. We tested nine concrete blocks, each incorporating three types of PCMs with varying melting points (31 °C, 35 °C, and 42 °C). The PCMs were integrated in different quantities (three or six capsules) and configurations, using custom acrylic supports for precise placement. These blocks were then compared against a control block.</div><div>The results demonstrated significant thermal benefits. Specific configurations with six RT-35 capsules placed at one-third of the block height reduced concrete surface temperatures by up to 5 °C under simulated solar radiation. Furthermore, PCM integration delayed the transmission of the peak heat load through the blocks, with delays of 40–55 min for RT-31, 32–49 min for RT-35, and 0–60 min for RT-42. This indicates the potential for substantial building energy savings. Notably, the RT-42 (Design-2, Position 1) configuration showed the most significant peak load reduction (4.2 °C PLS, 6.7 °C MTR) and the longest delay (60 min PLTL), though its overall effectiveness was highly dependent on its configuration.</div><div>While some configurations had a minimal impact on compressive strength, placing six capsules near the top surface led to an average reduction of up to 10 %. This research provides valuable quantitative data on the thermal and structural implications of integrating PCMs into concrete ceilings. The findings highlight the potential for substantial cooling benefits while also emphasizing the critical need for optimized configuration design to ensure structural integrity.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"138 ","pages":"Article 118762"},"PeriodicalIF":8.9000,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Passive cooling of buildings using phase change materials integrated in concrete ceilings: An experimental study\",\"authors\":\"Mohammed A. Almeshaal , R.Y. Sakr , Ismail M.M. Elsemary , Ahmed A. Altohamy\",\"doi\":\"10.1016/j.est.2025.118762\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This innovative experimental study evaluated the thermal and mechanical performance of concrete ceilings enhanced with Phase Change Materials (PCMs) for passive cooling in a simulated desert climate. We tested nine concrete blocks, each incorporating three types of PCMs with varying melting points (31 °C, 35 °C, and 42 °C). The PCMs were integrated in different quantities (three or six capsules) and configurations, using custom acrylic supports for precise placement. These blocks were then compared against a control block.</div><div>The results demonstrated significant thermal benefits. Specific configurations with six RT-35 capsules placed at one-third of the block height reduced concrete surface temperatures by up to 5 °C under simulated solar radiation. Furthermore, PCM integration delayed the transmission of the peak heat load through the blocks, with delays of 40–55 min for RT-31, 32–49 min for RT-35, and 0–60 min for RT-42. This indicates the potential for substantial building energy savings. Notably, the RT-42 (Design-2, Position 1) configuration showed the most significant peak load reduction (4.2 °C PLS, 6.7 °C MTR) and the longest delay (60 min PLTL), though its overall effectiveness was highly dependent on its configuration.</div><div>While some configurations had a minimal impact on compressive strength, placing six capsules near the top surface led to an average reduction of up to 10 %. This research provides valuable quantitative data on the thermal and structural implications of integrating PCMs into concrete ceilings. The findings highlight the potential for substantial cooling benefits while also emphasizing the critical need for optimized configuration design to ensure structural integrity.</div></div>\",\"PeriodicalId\":15942,\"journal\":{\"name\":\"Journal of energy storage\",\"volume\":\"138 \",\"pages\":\"Article 118762\"},\"PeriodicalIF\":8.9000,\"publicationDate\":\"2025-10-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of energy storage\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2352152X25034759\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of energy storage","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352152X25034759","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Passive cooling of buildings using phase change materials integrated in concrete ceilings: An experimental study
This innovative experimental study evaluated the thermal and mechanical performance of concrete ceilings enhanced with Phase Change Materials (PCMs) for passive cooling in a simulated desert climate. We tested nine concrete blocks, each incorporating three types of PCMs with varying melting points (31 °C, 35 °C, and 42 °C). The PCMs were integrated in different quantities (three or six capsules) and configurations, using custom acrylic supports for precise placement. These blocks were then compared against a control block.
The results demonstrated significant thermal benefits. Specific configurations with six RT-35 capsules placed at one-third of the block height reduced concrete surface temperatures by up to 5 °C under simulated solar radiation. Furthermore, PCM integration delayed the transmission of the peak heat load through the blocks, with delays of 40–55 min for RT-31, 32–49 min for RT-35, and 0–60 min for RT-42. This indicates the potential for substantial building energy savings. Notably, the RT-42 (Design-2, Position 1) configuration showed the most significant peak load reduction (4.2 °C PLS, 6.7 °C MTR) and the longest delay (60 min PLTL), though its overall effectiveness was highly dependent on its configuration.
While some configurations had a minimal impact on compressive strength, placing six capsules near the top surface led to an average reduction of up to 10 %. This research provides valuable quantitative data on the thermal and structural implications of integrating PCMs into concrete ceilings. The findings highlight the potential for substantial cooling benefits while also emphasizing the critical need for optimized configuration design to ensure structural integrity.
期刊介绍:
Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.