STUDY ON FLUID TEMPERATURE DISTRIBUTION OF BURIED TUBE HEAT EXCHANGER BASED ON p-ORDER LINER MODEL

Zhao Peng; Zhang Donghai; Li Xiaozhao; Zhang Gubin; Kou Yafei; Gao Penghui

doi:10.19912/j.0254-0096.tynxb.2023-0690

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (6) : 51-59. DOI: 10.19912/j.0254-0096.tynxb.2023-0690

STUDY ON FLUID TEMPERATURE DISTRIBUTION OF BURIED TUBE HEAT EXCHANGER BASED ON p-ORDER LINER MODEL

Zhao Peng^1,2, Zhang Donghai^1~3, Li Xiaozhao^1,2, Zhang Gubin⁴, Kou Yafei⁴, Gao Penghui^1~3

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Abstract

The self-developed stratified thermal response test system was used to obtain the data of fluid temperature in the pipe along the flow direction （vertical）, and then the calculation results of the p-order linear model were compared with the measured data to investigate the temperature distribution law and the optimal p-value of fluid in the pipe for stratification conditions under two typical working conditions. The results show that the p=-5 order linear model can accurately predict the temperature distribution in the pipe under constant heat flow condition. Under constant temperature condition, the optimal p-value varies with flow rate and the relationship is: | p |=7.361 lnV + 6.684.

Key words

geothermal energy / buried tube heat exchanger / rock and soil heat transfer / stratification of geological structure / parameter estimation

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Zhao Peng, Zhang Donghai, Li Xiaozhao, Zhang Gubin, Kou Yafei, Gao Penghui. STUDY ON FLUID TEMPERATURE DISTRIBUTION OF BURIED TUBE HEAT EXCHANGER BASED ON p-ORDER LINER MODEL[J]. Acta Energiae Solaris Sinica. 2024, 45(6): 51-59 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0690

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