Multifunctional Radiative Cooling Geopolymer for Energy Saving in Buildings.
建築物の省エネのための多機能放射冷却ジオポリマー (AI 翻訳)
Yifan Zhou, Junwei Liu, Hailu Wei, Yan Liang, Weiyi Zhang, Yahui Du, Junying Lai, Jinyue Yan
🤖 gxceed AI 要約
日本語
本論文は、従来のセメントに代わる持続可能な建築材料として、断熱性と放射冷却を兼ね備えた多機能放射冷却ジオポリマー（MRCG）を提案。MRCGは熱伝導率0.31 W/(m·K)と高い日射反射率（>93%）および中赤外放射率（>95%）を実現し、昼間の室温低下約4°Cを達成。モデルシミュレーションにより、暑い気候で最大23%の省エネ効果を示し、建物のCO2排出削減に貢献する。
English
This paper proposes a multifunctional radiative cooling geopolymer (MRCG) as a sustainable building material combining thermal insulation and radiative cooling. MRCG achieves low thermal conductivity (0.31 W/(m·K)), high solar reflectance (>93%), and high mid-infrared emissivity (>95%), enabling daytime subambient cooling of ~4°C. Modeling shows energy savings up to 23% in hot climates, contributing to building decarbonization.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では、建築物の省エネ基準（ZEH、ZEB）の強化や2050年カーボンニュートラル目標に伴い、断熱性能と冷却負荷低減を両立する新素材への関心が高まっている。MRCGはセメント代替による製造段階のCO2削減と運用段階の空調エネルギー削減を同時に実現可能であり、日本の建設業界にとって有望な技術となる。
In the global GX context
Japan's building energy efficiency standards (ZEH/ZEB) are tightening toward 2050 carbon neutrality. MRCG offers a dual benefit: reducing embodied carbon from cement replacement and operational carbon from HVAC savings. This material innovation aligns with global radiative cooling research and could be scaled for Japanese climate zones (hot summers, humid).
👥 読者別の含意
🔬研究者:Provides a novel material design integrating radiative cooling and thermal insulation in a geopolymer matrix, with quantifiable energy savings in hot climates.
🏢実務担当者:MRCG could be used as a building envelope material to reduce cooling loads and improve energy efficiency, potentially lowering operational costs and carbon footprints.
🏛政策担当者:Supports building energy codes and material standards by demonstrating a low-embodied-carbon, high-performance alternative to conventional cement.
📄 Abstract（原文）
The construction industry, driven by the growing energy demands for heating, cooling, and lighting, accounts for nearly 40% of global energy consumption. It heavily relies on traditional materials such as Ordinary Portland Cement (OPC), whose production is energy-intensive and accounts for approximately 8% of global carbon dioxide (CO2) emissions. This study presents a multifunctional radiative cooling geopolymer (MRCG) as a promising and sustainable building material designed to address the aforementioned challenges. Prepared via an environmentally benign process, MRCG integrates thermal insulation and radiative cooling within a single material matrix. It exhibits a low thermal conductivity of 0.31 W/(m·K), significantly lower than that of conventional cement (1.13 W/(m·K)), while maintaining fire resistance and high compressive strength, supporting durable implementation in practical building applications. Meanwhile, MRCG delivers strong optical performance, with solar reflectance exceeding 93% and mid-infrared emissivity above 95%, enabling daytime subambient cooling of approximately 4.0 °C. Such cooling capability is expected to reduce HVAC electricity demand and thereby lower operational CO2 emissions in buildings. The modeling results demonstrate energy savings of up to 23% in hot climates when using MRCG, underscoring its regional adaptability and environmental benefits. By combining low thermal conductivity, high strength, and effective radiative cooling, MRCG provides a promising solution for future energy-efficient buildings, contributing to global carbon reduction goals.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1021/acsami.6c00679first seen 2026-06-29 07:12:37
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