Petroleum Reservoir Evaluation and Development >
2022 , Vol. 12 >Issue 6: 886 - 893
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2022.06.007
Influence of sustainable load imbalance ratio of heat exchanger of medium-shallow borehole
Received date: 2022-06-29
Online published: 2022-12-02
The heat exchanger of medium-shallow borehole which have a deeper depth than the traditional ground source heat pump system and can sustain a notable load imbalance ratio and widen the application scope of geothermal energy. In order to investigate the long-term performance of medium-shallow borehole heat exchanger in the area with unbalanced cooling and heating load of buildings and the sustainable load imbalance ratio under different design parameters, a comprehensive numerical model is established based on the OpenGeoSys. The results show that the sustainable load imbalance ratio of medium-shallow borehole heat exchangers change with different scales. The load imbalance ratio of a single heat exchanger is 56 %, while the load imbalance ratio of the heat exchanger located at the edge of the array is the largest of 60 %, and the load imbalance ratio of the heat exchanger located in the center of the array is the smallest of 45 %. This indicates that the cold accumulation phenomenon will reduce the load imbalance ratio of the medium-shallow borehole heat exchanger. Therefore, in the actual operation process, the overall operation performance of the array can be avoided by shutting down some medium-shallow borehole heat exchanger located in the center of the array. Under three different arrangements, the load imbalance ratio of the medium-shallow borehole heat exchangers also changes, ranging from 53 % to 58 %. The average load imbalance ratio of the medium-shallow borehole heat exchangers in staggered arrangement is the highest, so it is recommended to adopt staggered arrangement in practical application. The results show that the newly proposed medium-shallow borehole heat exchanger can sustain a notable load imbalance ratio, and provide a basis for the design of medium-shallow borehole heat exchangers.
Tian'an ZHANG , Ruifeng WANG , Fenghao WANG , Wanlong CAI , Cong ZHOU , Boyang LIU . Influence of sustainable load imbalance ratio of heat exchanger of medium-shallow borehole[J]. Petroleum Reservoir Evaluation and Development, 2022 , 12(6) : 886 -893 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.06.007
| [1] | VERMA P, KUMARI T, RAGHUBANSHI A S. Energy emissions, consumption and impact of urban households: A review[J]. Renewable and Sustainable Energy Reviews, 2021, 147: 111210. |
| [2] | ZHANG S C, FU Y J, YANG X Y, et al. Assessment of mid-to-long term energy saving impacts of nearly zero energy building incentive policies in cold region of China[J]. Energy and Buildings, 2021, 241: 110938. |
| [3] | AUSTIN A, BEHNAZ R. Geothermal technology: Trends and potential role in a sustainable future[J]. Applied Energy, 2019, 248: 18-34. |
| [4] | JOHN W L, ANIKO N T. Direct utilization of geothermal energy 2020 worldwide review[J]. Geothermics, 2021, 90: 101915. |
| [5] | 王沣浩, 蔡皖龙, 王铭, 等. 地热能供热技术研究现状及展望[J]. 制冷学报, 2021, 42(1): 14-22. |
| [5] | WANG Fenghao, CAI Wanlong, WANG Ming, et al. Status and outlook for research on geothermal heating technology[J]. Journal of Refrigeration, 2021, 42(1): 14-22. |
| [6] | 中国地质调查局. 中国地热能发展报告(2018)[R]. 北京: 中国石化出版社, 2018. |
| [6] | China Geological Survey. China geothermal energy development report(2018)[R]. Beijing: China Petrochemical Press, 2018. |
| [7] | YANG W B, CHEN Y P, SHI M H, et al. Numerical investigation on the underground thermal imbalance of ground-coupled heat pump operated in cooling-dominated district[J]. Applied Thermal Engineering, 2013, 58: 626-637. |
| [8] | QIAN H, WANG Y G. Modeling the interactions between the performance of ground source heat pumps and soil temperature variations[J]. Energy for Sustainable Development, 2014, 23: 115-121. |
| [9] | HOU G Y, HESSAM T, SONG Y, et al. A systematic review on optimal analysis of horizontal heat exchangers in ground source heat pump systems[J]. Renewable and Sustainable Energy Reviews, 2022, 154: 111830. |
| [10] | HU Z C, GENG S W, HUANG Y F, et al. Heat storage characteristics and application analysis of heat source tower in soil thermal balance of ground source heat pump[J]. Energy and Buildings, 2021, 235: 110752. |
| [11] | DENIS G, RUCHI C, KENICHI S. Risk based lifetime costs assessment of a ground source heat pump (GSHP) system design: Methodology and case study[J]. Building and Environment, 2013, 60: 66-80. |
| [12] | LUO J, JOACHIM R, MANFRED B, et al. Heating and cooling performance analysis of a ground source heat pump system in Southern Germany[J]. Geothermics, 2015, 53: 57-66. |
| [13] | CHEN F, MAO J F, ZHU G D, et al. Numerical assessment on the thermal imbalance of multiple ground heat exchangers connected in parallel[J]. Geothermics, 2021, 96: 102191. |
| [14] | MASSIMO C, PARHAM E N. A simulation model for solar assisted shallow ground heat exchangers in series arrangement[J]. Energy and Buildings, 2017, 157: 227-246. |
| [15] | YOU T, WANG B L, WU W, et al. A new solution for underground thermal imbalance of ground-coupled heat pump systems in cold regions: Heat compensation unit with thermosyphon[J]. Applied Thermal Engineering, 2014, 64(1): 283-292. |
| [16] | ZHAI X Q, CHENG X W, WANG R Z. Heating and cooling performance of a mini-type ground source heat pump system[J]. Applied Thermal Engineering, 2017, 111: 1366-1370. |
| [17] | CHEN S, FRANCESCO W, OLAF K, et al. Shifted thermal extraction rates in large borehole heat exchanger array: A numerical experiment[J]. Applied Thermal Engineering, 2020, 167: 114750. |
| [18] | PHILIPP H, OLAF K, UWE-JENS G, et al. A numerical study on the sustainability and efficiency of borehole heat exchanger coupled ground source heat pump systems[J]. Applied Thermal Engineering, 2016, 100: 421-433. |
| [19] | FRANCESCO W, ILJA T. TESPy: Thermal engineering systems in python[J]. Open Source Software, 2020, 5: 2178. |
| [20] | BELL I H, WRONSKI J, QUOILIN S, et al. Pure and pseudo-pure fluid thermophysical property evaluation and the open-source thermophysical property library coolprop[J]. Industrial and Engineering Chemistry Research, 2014, 53: 2498-2508. |
| [21] | CAI W L, WANG F H, CHEN S, et al. Analysis of heat extraction performance and long-term sustainability for multiple deep borehole heat exchanger array: A project-based study[J]. Applied Energy, 2021, 289: 116590. |
| [22] | 周阳, 穆根胥, 张卉, 等. 关中盆地地温场划分及其地质影响因素[J]. 中国地质, 2017, 44(5): 1017-1026. |
| [22] | ZHOU Yang, MU Genxu, ZHANG Hui, et al. Geothermal field division and its geological influencing factors in Guanzhong basin[J]. Geology in China, 2017, 44(5): 1017-1026. |
| [23] | CHEN S, CAI W L, FRANCESCO W, et al. Long-term thermal imbalance in large borehole heat exchangers array: A numerical study based on the Leicester project[J]. Energy and Buildings, 2021, 231: 110518. |
| [24] | JAKOB R, CHEN S, KATRIN L, et al. Modeling neighborhood scale shallow geothermal energy utilization: A case study in Berlin[J]. Geotherm Energy, 2022, 10: 1-26. |
| [25] | RICHARD A B. Thermal response tests on deep borehole heat exchangers with geothermal gradient[J]. Applied Thermal Engineering, 2020, 178: 115447. |
| [26] | 中华人民共和国建设部.地源热泵系统工程技术规范: GB 50366—2009[S]. 北京: 中国建筑工业出版社, 2009. |
| [26] | Ministry of Construction of the People's Republic of China.Technical code for ground-source heat pump system: GB 50366—2009[S]. Beijing, China Architecture and Building Press, 2009. |
/
| 〈 |
|
〉 |