Impact of soil model complexity on the long-term thermal performance prediction of a new shallow bore ground heat exchanger

Shi, Liang; Qu, Ming; Liu, Xiaobing; Zhang, Mingkan; Wang, Lingshi

doi:10.1080/23744731.2021.1908038

Impact of soil model complexity on the long-term thermal performance prediction of a new shallow bore ground heat exchanger

Journal Article · Thu Apr 22 00:00:00 EDT 2021 · Science and Technology for the Built Environment

DOI:https://doi.org/10.1080/23744731.2021.1908038· OSTI ID:1782040

Shi, Liang ^[1]; Qu, Ming ^[1]; ^[2]; ^[2]; ^[2]

Purdue Univ., West Lafayette, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Shallow bore ground heat exchangers have been investigated in recent years because they have the potential to reduce the initial cost of the ground source heat pump system. Correctly modeling the transient heat transfer between the ground heat exchanger and the surrounding soil is essential for predicting a ground heat exchanger's performance. Simplification of the soil model could increase computation speed but sacrifice accuracy. This study investigates the impact of the soil model complexity on the annual performance prediction of a new shallow bore ground heat exchanger, the underground thermal battery (UTB). A simple 1D soil model and a more detailed 2D soil model were implemented, and they were validated against a 3D soil model. Overall, the resulting predictions of the UTB’s response from the 1D and 2D models to a given thermal load in different climates were compared. The results show that the root mean square differences between the hourly temperatures of the UTB during a year predicted using the two soil models range from 1.17°C to 3.39°C. As a result, the difference in the annual power consumption of the heat pump was between 0.7% and 3.4%. Furthermore, the dimensions of the UTB affected its performance, and a longer UTB was less sensitive to the soil models.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1782040

Journal Information:: Science and Technology for the Built Environment, Journal Name: Science and Technology for the Built Environment Journal Issue: 6 Vol. 28; ISSN 2374-4731

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

References (11)

European project “Cheap-GSHPs”: installation and monitoring of newly designed helicoidal ground source heat exchanger on the German test site Bertermann, David; Bernardi, Adriana; Pockelé, Luc Environmental Earth Sciences, Vol. 77, Issue 5 https://doi.org/10.1007/s12665-018-7343-4	journal	February 2018
Heat transfer analysis of short helical borehole heat exchangers Zarrella, Angelo; De Carli, Michele Applied Energy, Vol. 102 https://doi.org/10.1016/j.apenergy.2012.09.012	journal	February 2013
Experimental study of a domestic solar-assisted ground source heat pump with seasonal underground thermal energy storage through shallow boreholes Naranjo-Mendoza, Carlos; Oyinlola, Muyiwa A.; Wright, Andrew J. Applied Thermal Engineering, Vol. 162 https://doi.org/10.1016/j.applthermaleng.2019.114218	journal	November 2019
A three-dimensional numerical investigation of a novel shallow bore ground heat exchanger integrated with phase change material Zhang, Mingkan; Liu, Xiaobing; Biswas, Kaushik Applied Thermal Engineering, Vol. 162 https://doi.org/10.1016/j.applthermaleng.2019.114297	journal	November 2019
A revised capacitance resistance model for large diameter shallow bore ground heat exchanger Najib, Antash; Zarrella, Angelo; Narayanan, Vinod Applied Thermal Engineering, Vol. 162 https://doi.org/10.1016/j.applthermaleng.2019.114305	journal	November 2019
A novel shallow bore ground heat exchanger for ground source heat pump applications—Model development and validation Warner, Joseph; Liu, Xiaobing; Shi, Liang Applied Thermal Engineering, Vol. 164 https://doi.org/10.1016/j.applthermaleng.2019.114460	journal	January 2020
Thermal performance of a conic basket heat exchanger coupled to a geothermal heat pump for greenhouse cooling under Tunisian climate Boughanmi, Hassen; Lazaar, Mariem; Bouadila, Salwa Energy and Buildings, Vol. 104 https://doi.org/10.1016/j.enbuild.2015.07.004	journal	October 2015
A simulation model for solar assisted shallow ground heat exchangers in series arrangement Cimmino, Massimo; Eslami-Nejad, Parham Energy and Buildings, Vol. 157 https://doi.org/10.1016/j.enbuild.2016.03.019	journal	December 2017
Techno-economic parametric analysis of large diameter shallow ground heat exchanger in California climates Najib, Antash; Zarrella, Angelo; Narayanan, Vinod Energy and Buildings, Vol. 228 https://doi.org/10.1016/j.enbuild.2020.110444	journal	December 2020
Simulation Model for Thermally Interacting heat Extraction Boreholes Eskilson, Per; Claesson, Johan Numerical Heat Transfer, Vol. 13, Issue 2 https://doi.org/10.1080/10407788808913609	journal	March 1988
Prediction of undisturbed ground temperature using analytical and numerical modeling. Part I: Model development and experimental validation Xing, Lu; Spitler, Jeffrey D. Science and Technology for the Built Environment, Vol. 23, Issue 5 https://doi.org/10.1080/23744731.2016.1258371	journal	December 2016

Similar Records

Development of New g-function Data for Simulating a Novel Shallow Bore Ground Heat Exchanger

Conference · Mon Aug 01 00:00:00 EDT 2022 · OSTI ID:1886451

A novel shallow bore ground heat exchanger for ground source heat pump applications—Model development and validation

Journal Article · Sat Jan 04 23:00:00 EST 2020 · Applied Thermal Engineering · OSTI ID:1570123

A Three-Dimensional Numerical Investigation of a Novel Shallow Bore Ground Heat Exchanger Integrated with Phase Change Material

Journal Article · Sat Aug 24 00:00:00 EDT 2019 · Applied Thermal Engineering · OSTI ID:1559656

Related Subjects

42 ENGINEERING
ground source heat pump
numerical solutions
shallow bore ground heat exchanger
soil model

Impact of soil model complexity on the long-term thermal performance prediction of a new shallow bore ground heat exchanger

Citation Formats

References (11)

Similar Records

Related Subjects