THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Peifa Ma

,

Li Mo

,

Jie Zhang

,

Pengtao Wang

ENHANCED HEAT TRANSFER PERFORMANCE OF A NEW HORIZONTAL BURIED TUBE HEAT EXCHANGER

ABSTRACT
To reduce the land area of horizontal buried tube heat exchanger, a finned strengthened heat exchanger was designed, and shallow geothermal utilization system model was established. The effects of fin shape and arrangement, soil type, ambient temperature and intermittent operation on the system’s heat transfer performance were investigated. The soil utilization area of the heat exchanger is increased, and the heat exchange performance of the system is enhanced by adding fins on the smooth tube. The optimal shape of the fins is rectangular, and the optimal fin lay-out is horizontal. When the soil property is clay, the heat transfer is the smallest, and the heat transfer performance is improved compared with the smooth tube. Intermittent operation not only improves the heat exchange, but also enhances the effect of adding fins to improve the heat exchange performance of the system. Compared with the original smooth tube, the soil utilization range is increased by 20%, and the heat exchange is increased by 42%.
KEYWORDS
ground coupled heat pump, enhanced heat transfer, horizontal buried tube, intermittent operation
PAPER SUBMITTED: 2022-05-09
PAPER REVISED: 2022-07-22
PAPER ACCEPTED: 2022-07-27
PUBLISHED ONLINE: 2022-09-10
DOI REFERENCE: https://doi.org/10.2298/TSCI220509131M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 2, PAGES [1507 - 1516]
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Enhanced heat transfer performance of a new horizontal buried tube heat exchanger

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