Thermal properties of phase change thermal storage foam concrete

YIN Guansheng; ZHANG Jintao; SHI Minghui; CHEN Wenbo; ZHENG Xiaohai; WEI Pengfei; FENG Junjie; ZHENG Biyu

doi:10.13801/j.cnki.fhclxb.20221024.005

Volume 40 Issue 7

Apr. 2023

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YIN Guansheng, ZHANG Jintao, SHI Minghui, et al. Thermal properties of phase change thermal storage foam concrete[J]. Acta Materiae Compositae Sinica, 2023, 40(7): 4246-4259. doi: 10.13801/j.cnki.fhclxb.20221024.005

Citation:

YIN Guansheng, ZHANG Jintao, SHI Minghui, et al. Thermal properties of phase change thermal storage foam concrete[J]. Acta Materiae Compositae Sinica, 2023, 40(7): 4246-4259. doi: 10.13801/j.cnki.fhclxb.20221024.005

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Thermal properties of phase change thermal storage foam concrete

doi: 10.13801/j.cnki.fhclxb.20221024.005

1.
School of Science, Chang'an University, Xi'an 710064, China
2.
Operation Branch of Xi'an Rail Transit Group CO., LTD., Xi'an 710018, China
3.
School of Science, Xijing University, Xi'an 710123, China
4.
Shaanxi Controllable Neutron Source Engineering Technology Research Center, School of Science, Xijing University, Xi'an 710123, China

Funds: Xi'an City Construction Technology Project (SZJJ2019-18); Shaanxi Province Housing and Urban-Rural Construction Science and Technology Project (2015-k95)

Received Date: 2022-08-01
Accepted Date: 2022-10-16
Rev Recd Date: 2022-10-11

Available Online: 2022-10-24

Publish Date: 2023-07-15

Abstract

Abstract

In order to seek building materials with energy-saving effect, a phase change thermal storage foam concrete with thermal storage and temperature regulation capabilities was prepared by means of experimental design and numerical simulation. Its dry density grade is 700 kg/m³, the content of shaped composite phase change material accounted for 0%, 3%, 6%, 9%, 12% and 15% of the mass of the cementitious material, respectively. The influence of shaped composite phase change materials on the dry density, compressive strength and thermal properties of foam concrete was explored, and the finite element software ABAQUS was used to establish the wall model of phase change thermal storage foam concrete, and the heat storage and temperature regulating performance of phase change thermal storage foam concrete wall was studied. The experiment results show that the dry density, compressive strength and thermal conductivity of the phase change thermal storage foam concrete gradually decrease with the increase of the content of the shaped composite phase change material. When the content of the shaped composite phase change material is 15%, the dry density, compressive strength and thermal conductivity reach the minimum values, which are 661 kg/m³, 2.18 MPa and 0.144 W/(m·K), respectively. With the increase of the content of shaped composite phase change material, the phase change temperature, phase change latent heat and specific heat capacity of foam concrete also increase. When the content of shaped composite phase change material is 15%, the phase change temperature is 24.83℃, the phase change latent heat is 12.320 J/g, and the specific heat capacity is 1462 J/(kg·℃). The finite element simulation results show that when the content of the shaped composite phase change material is 15%, the temperature fluctuation range of the inner surface of the phase change thermal storage foam concrete wall is 25.37-26.57℃, and the maximum temperature difference is 1.20℃, which is 0.46℃ lower than that of pure foam concrete, the time to the highest temperature is delayed by 1.83 h, and the time to reach the lowest temperature is delayed by 1.16 h compared with the pure foam concrete wall. When the phase change thermal storage foam concrete is arranged inside the wall, its thermal storage and temperature regulation effect are the best.
- phase change thermal storage foam concrete,
- dry density,
- compressive strength,
- thermal conductivity,
- thermal storage capacity
Long Abstrsct
Innovation Points

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References(24)

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