EXPERIMENTAL AND SIMULATION RESEARCH OF DIFFERENT LINING MATERIALS FOR UNDERGROUND GRANARY

Chen Yan; Qiu Guanpeng; Zhang Ruiyuan; Zhang Wenzhen; Cui Weihua; Bi Wenfeng

doi:10.19912/j.0254-0096.tynxb.2022-0269

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 53-60. DOI: 10.19912/j.0254-0096.tynxb.2022-0269

EXPERIMENTAL AND SIMULATION RESEARCH OF DIFFERENT LINING MATERIALS FOR UNDERGROUND GRANARY

Chen Yan, Qiu Guanpeng, Zhang Ruiyuan, Zhang Wenzhen, Cui Weihua, Bi Wenfeng

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Abstract

An underground granary experiment system was set up to carry out a series of comparison tests on different lining waterproof materials. The experiments were conducted under three continuous seasonal conditions. Under the quasi-static non-manual working conditions, the effects of different lining waterproof materials on the condensation were researched for inner wall in the granary. The experimental results show that the ground air temperature has an obvious influence on the underground granary, especially when the burial depth is small. The temperature distribution of the grain bulk shows a phenomenon of "cold skin and hot core", which is common in building granaries during winter. Furthermore, it is observed that the temperature in the steel part is lower than that of the polypropylene part with a maximum difference of 1.5 ℃, and the maximum relative humidity difference is 7.1%. Also, the average temperature in the grain bulks drops by 0.5 ℃. Therefore, if condensation is considered, plastic has a priority over steel as underground waterproof material. Moreover, CFD simulation was conducted after being verified by the experimental data, which indicated that a sequence of steel, asphalt, polyethylene, FRP and polypropylene should be taken for cooling purpose. However, polypropylene lined granary has a slower temperature change compared with other waterproof materials, and thus less opportunity to condensation.

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grain storage / geothermal energy / condensation / simulation experiment / lining materials

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Chen Yan, Qiu Guanpeng, Zhang Ruiyuan, Zhang Wenzhen, Cui Weihua, Bi Wenfeng. EXPERIMENTAL AND SIMULATION RESEARCH OF DIFFERENT LINING MATERIALS FOR UNDERGROUND GRANARY[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 53-60 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0269

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