THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Xin Wang

,

Qiang Fu

,

Changlong Wang

STUDY ON THE SIMPLIFIED MODEL OF VERTICAL DOUBLE U-PIPE GROUND HEAT EXCHANGER

ABSTRACT
A simplified semi-analytical model of vertical double U-pipe ground heat exchanger was established. The validity of the established model is examined by contrasting the figured outcomes with experiment data, emulation results of 3-D numerical model and calculation results of infinite line-source model for different inlet boundary conditions and configurations. After one hour, the semi-analytical model’s relative error is less than 0.32% under the boundary condition of given inlet fluid temperature. Under the boundary condition of given total heat input rate, the semi-analytical model’s relative error after ten hours is less than 0.11%, while the infinite line-source model’s relative error is less than 0.60%. The semi-analytical model is in good agreement with experiment and numerical model, and has higher calculation accuracy than infinite line-source model.
KEYWORDS
verticaldouble U-pipe ground heat exchanger (VDUGHE), semi-analytical model, heat transfer, temperature distribution
PAPER SUBMITTED: 2022-09-22
PAPER REVISED: 2022-12-15
PAPER ACCEPTED: 2022-12-22
PUBLISHED ONLINE: 2023-03-11
DOI REFERENCE: https://doi.org/10.2298/TSCI220922048W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [4035 - 4048]
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Study on the simplified model of vertical double U-pipe ground heat exchanger

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