Discussion on geothermal recovery process of deep borehole heat exchanger in layered stratum
DOI: 10.23977/jemm.2022.070105 | Downloads: 19 | Views: 465
Feilong Chen 1, Yujie Bai 1
1 School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
Corresponding AuthorFeilong Chen
To explore the characters of geothermal recovery process of deep borehole heat exchanger, a geothermal recovery process was simulated to explore the difference in stratum temperature distribution change under layered model and uniform model. The results indicated that the geothermal recovery rate is sharp at first and slow down then. The outlet temperature would be higher in the next heat extraction stage if the longer geothermal recovery period was adopted. Considering the time cost during the geothermal recovery period, the suggesting proportion of heat extraction and geothermal recovery could adopt 1:1. In addition, the uniform model cannot reveal the ground temperature variety of layered in geothermal recovery process accurately.
KEYWORDSdeep coaxial heat exchanger, finite element method, geothermal recovery
CITE THIS PAPER
Feilong Chen, Yujie Bai, Discussion on geothermal recovery process of deep borehole heat exchanger in layered stratum. Journal of Engineering Mechanics and Machinery (2022) Vol. 7: 32-37. DOI: http://dx.doi.org/10.23977/jemm.2022.070105.
 Yanlong Kong, Zhonghe Pang, Haibing Shao, et, al. (2014) Recent studies on hydrothermal systems in China: a review. Geothermal Energy 2: 19.
 Su Y, Yang F, Wang B, Jia Z, Duan Z. (2018) Reinjection of cooled water into sandstone geothermal reservoirs in China: a review. Geosciences Journal. 22 (1): 199-207.
 Sheng Pan, Yanlong Kong, Chaofan Chen, et al. (2020) Optimization of the utilization of deep borehole heat exchangers. Geothermal Energy, 8 (1): 1-20.
 Tan Manh Do, Hyeong-Ki Kim, Min-Jun Kim, et, al. (2020) Utilization of controlled low strength material (CLSM) as a novel grout for geothermal systems: Laboratory and field experiments. Journal of Building Engineering, 29: 101110.
 David Gordon, Tirupati Bolisetti, David S.-K. Ting, et, al. (2017) Short-term fluid temperature variations in either a coaxial or U-tube borehole heat exchanger. Geothermics, 67 29-39.
 Huai Li, Katsunori Nagano, Yuanxiang Lai. (2012) Heat transfer of a horizontal spiral heat exchanger under groundwater advection. International Journal of Heat and Mass Transfer, 55: 6819-6831.
 José Acuña, Björn Palm. (2013) Distributed thermal response tests on pipe-in-pipe borehole heat. Applied Energy, 109: 312-320.
 Christopher J. Wood, Hao Liu, Saffa B. Riffat. (2020) Multi-external-chamber coaxial borehole heat exchanger: Dynamic heat transfer and energy consumption analysis. Energy Conversion and Management, 207: 112519.
 Zhihua Wang, Fenghao Wang, Jun Liu, et, al. (2017) Field test and numerical investigation on the heat transfer characteristics and optimal design of the heat exchangers of a deep borehole ground source heat pump system. Energy Conversion and Management, 153: 603-615.
 Soleiman Iry, Roohollah Rafee. (2019) Transient numerical simulation of the coaxial borehole heat exchanger with the different diameters ratio. Geothermics, 77: 158-165.