A novel cement mortar comprising natural zeolite/dodecyl alcohol shape stable composite phase change material for energy effective buildings

被引：0

作者：

Sarı, Ahmet ^{[1
,2
]}

Nas, Memduh ^{[3
]}

Yeşilata, Bülent ^{[4
]}

Ustaoğlu, Abid ^{[5
]}

Erdoğmuş, Ertuğrul ^{[6
]}

Torlaklı, Hande ^{[5
]}

Hekimoğlu, Gökhan ^{[1
]}

Gencel, Osman ^{[7
]}

机构：

[1] Department of Metallurgical and Material Engineering, Karadeniz Technical University, Trabzon,61080, Turkey

[2] Interdisciplinary Research Center of Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum & Minerals, Dhahran,31261, Saudi Arabia

[3] Department of Civil Engineering, Karadeniz Technical University, Trabzon,61080, Turkey

[4] Department of Energy Systems Engineering, Faculty of Engineering and Natural Sciences, Ankara Yıldırım Beyazıt University, Ankara,06010, Turkey

[5] Department of Mechanical Engineering, Faculty of Engineering, Architecture and Design, Bartin University, Bartin,74100, Turkey

[6] Department of Environmental Engineering, Faculty of Engineering, Architecture and Design, Bartin University, Bartin,74100, Turkey

[7] Civil Engineering Department, Faculty of Engineering, Architecture and Design, Bartin University, Bartin,74100, Turkey

来源：

Journal of Energy Storage | 2024年 / 87卷

关键词：

Cements - Energy efficiency - Enthalpy - Heat storage - Hydration - Melting - Mortar - Storage (materials) - Thermal conductivity - Zeolites;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Investigations into Phase Change Materials (PCMs) for heat storage in facilities have gained significance, contributing to indoor temperature regulation, decreased energy usage, and improved building efficiency, thereby supporting sustainability initiatives. However, the issue of PCM leakage during the heating phase has constrained its thermal energy storage (TES) prospective at large scaled-practices. Addressing this concern, the present study emphases on elimination of the leakage problem of dodecyl alcohol (DA) as a PCM with appropriate melting temperature for building TES request by its impregnating into the natural zeolite (NZ) as a low cost host matrix. In the second stage of the work, using the developed shape stable-NZ/DA (SS-NZ/DA) composite PCM in cement mortar instead of sand, novel cementitious mortars with enhanced thermal properties were created by incorporating different weight percentages (25 %, 50 %, 75 %, and 100 %) compared to the mortar comprising NZ. Experimental works were carried out to analyze the shape-stability, TES features, cycling TES stability and thermal endurance of the SS-NZ/DA composite as well the physical properties, mechanical strength, and solar temperature regulation performance of the SS-NZ/DA included mortars. The SS-NZ/DA demonstrated the melting enthalpy of 107.5 J/g at 19.47 °C and a freezing enthalpy of 106.1 J/g at 19.86 °C. The performance test results obtained under real weather conditions indicated that the integration of SS-NZ/DA into mortar presented maximum drop of 10 % and 9.26 % in peak indoor temperature at the SS-CPCM slab surface and the center of SS-CPCM slab-cabin, respectively, accompanied by an approximate 3-hour time delay. Mortars with SS-NZ/DA composite PCM exhibited a decreased dry unit weight (1189 kg/m3) and thermal conductivity (0.394 W/mK) while experiencing a moderate strength loss (4.5 MPa). These favorable physico-mechanical properties, TES characteristics and thermal management capability make the novel cementitious mortar containing composite PCM as an energy-efficient material for creating thermo-regulative building components. In this study, the natural, economical, and environmentally friendly nature of the NZ material used for PCM impregnation, its ability to contain a high percentage of PCM (up to 45 %) without any leakage issues, is the most fundamental and important characteristic of the composite used. The most unique feature of this composite mortar is the ability to achieve sufficient mechanical and thermal properties in cementitious mortars produced using this composite material without any leakage problems. © 2024 Elsevier Ltd

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