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Qian Jiang
School of Energy Safety Engineering, Tianjin Chengjian University, Tianjin, China
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8955-5499
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A coupling ground source heat pump system (CGSHP) is established in areas where groundwater is shallow but the seepage velocity is weak, which sets up pumping and injection wells on both sides of borehole heat exchangers (BHEs). A convection-dispersion analytical model of excess temperature in aquifer that considers groundwater forced seepage and axial effects and thermal dispersion effects is proposed. A controllable forced seepage sandbox is built by equation analysis method and similarity criteria. Through indoor test and the proposed analytical model, the correctness and accuracy of the numerical simulation software FEFLOW7.1 is verified. The influence of different pumping-injection flow rate on the heat transfer characteristic of BHEs is studied by numerical simulation. The results show that the average heat efficiency coefficient of BHEs increases and the heat influence range of downstream BHEs expands with the increasing of pumping-injection flow rate. The relation curve between Pe and the increment of heat transfer rate per unit depth of BHEs (Δ‾ q ) is distributed as Gaussian function. The pumping-injection flow rate that makes Darcy velocity reaches 0.6×10 -6 ~1.4×10 -6 m∙s -1 in the aquifer is the best reference range for CGSHP system,so 400~600 m 3 ∙d -1 is taken as the best pumping-injection flow rate in this paper.
Keywords
coupling ground source heat pump system, groundwater forced seepage, heat transfer, laboratory experiment, numerical simulation, analytical model
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View the published article at Geothermal Energy.
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Reviewer #2 agreed
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Reviewers invited
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Learn more about In Review
Research
Qian Jiang
School of Energy Safety Engineering, Tianjin Chengjian University, Tianjin, China
Corresponding Author
ORCiD: https://orcid.org/0000-0001-8955-5499
Badges
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Complete author information
Appropriate declaration statements
Potential risks to human health
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Peer Review Timeline
CURRENT STATUS: Published
View the published article at Geothermal Energy.
Version (no preprint)
Posted 01 Feb, 2021
Editorial decision: Minor revision
On 01 Feb, 2021
Review #1 received
Received 28 Jan, 2021
Reviewer #1 agreed
On 24 Jan, 2021
Reviewers invited
Invitations sent on 23 Jan, 2021
Editor assigned
On 21 Jan, 2021
Submission checks complete
On 21 Jan, 2021
Editor invited
On 21 Jan, 2021
First submitted
On 21 Jan, 2021
This version was not preprinted
No community comments so far
Editor assigned
On 21 Jan, 2021
Submission checks complete
On 21 Jan, 2021
Editor invited
On 21 Jan, 2021
No comments provided
Editorial decision: Minor revision
On 03 Jan, 2021
Editor assigned
On 01 Dec, 2020
Submission checks complete
On 01 Dec, 2020
Editor invited
On 01 Dec, 2020
Version 1
Posted 04 Aug, 2020
No comments provided
Editorial decision: Major revision
On 26 Oct, 2020
Review #2 received
Received 22 Oct, 2020
Review #1 received
Received 25 Sep, 2020
Reviewer #2 agreed
On 21 Sep, 2020
Reviewers invited
Invitations sent on 17 Sep, 2020
Reviewer #1 agreed
On 17 Sep, 2020
Editor assigned
On 03 Aug, 2020
Submission checks complete
On 02 Aug, 2020
Editor invited
On 02 Aug, 2020
First submitted
On 01 Aug, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Food Science & Technology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Geothermal Energy.
A coupling ground source heat pump system (CGSHP) is established in areas where groundwater is shallow but the seepage velocity is weak, which sets up pumping and injection wells on both sides of borehole heat exchangers (BHEs). A convection-dispersion analytical model of excess temperature in aquifer that considers groundwater forced seepage and axial effects and thermal dispersion effects is proposed. A controllable forced seepage sandbox is built by equation analysis method and similarity criteria. Through indoor test and the proposed analytical model, the correctness and accuracy of the numerical simulation software FEFLOW7.1 is verified. The influence of different pumping-injection flow rate on the heat transfer characteristic of BHEs is studied by numerical simulation. The results show that the average heat efficiency coefficient of BHEs increases and the heat influence range of downstream BHEs expands with the increasing of pumping-injection flow rate. The relation curve between Pe and the increment of heat transfer rate per unit depth of BHEs (Δ‾ q ) is distributed as Gaussian function. The pumping-injection flow rate that makes Darcy velocity reaches 0.6×10 -6 ~1.4×10 -6 m∙s -1 in the aquifer is the best reference range for CGSHP system,so 400~600 m 3 ∙d -1 is taken as the best pumping-injection flow rate in this paper.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
The full text of this article is available to read as a PDF.
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