Analysis of Temperature Profile Changes of Ground with Heat Pump Horizontal Heat Exchanger

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00368392" target="_blank" >RIV/68407700:21110/23:00368392 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1063/5.0173362" target="_blank" >https://doi.org/10.1063/5.0173362</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0173362" target="_blank" >10.1063/5.0173362</a>

Result language

angličtina

Original language name

Analysis of Temperature Profile Changes of Ground with Heat Pump Horizontal Heat Exchanger

Original language description

The aim of the article is the analysis of the ground temperature distribution to a depth of 2 m, and long term ground temperature changes in which horizontal heat exchanger is arranged. Moreover, the temperature changes of glycol, which is supplied to the heat pump connected to the ground exchanger, were analyzed. The horizontal heat exchanger is made of PE 32 mm pipes arranged at a depth of 1.5 m in the form of 4 meandering loops, each about 100 m long, arranged on an area of approximately 780 m2. The ground heat exchanger supplies a 10kW heat pump, which provides heat for central heating and hot tap water for a single-family building. The facility is located in transitional climate of Lublin province, Poland. The temperature profile was measured with 2 m long probes, each with 5 temperature sensors enabling to perform measurements at ground depths of 0, 50, 100, 150 and 200 cm. The temperature and mass flows of the glycol flowing through the ground exchanger were measured at the heat pump metering equipment. The research covered the heating season from November to March. The results showed a slow and systematic reduction in the temperature of the glycol supplied to the heating installations during the season on average from 10 °C to 4 °C, as well as the temperature of the ground at each analyzed depth. At a depth of 50, 100, 150 and 200 cm, the temperature reduction was 9.7-3.0 °C, 11.0-3.5 °C, 11.9-4.0 °C and 12.3-4.5 °C, respectively. There was no risk of ground freezing in the vicinity of the heat exchanger. The influence of the outside temperature to the ground temperature fluctuations is insignificant at a depth of 150 cm. Ground temperature changes on heat exchanger depth are proportional to the time of low outdoor temperatures during the season and the total energy derived from ground by the heat exchanger.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

AIP Conference Proceedings

ISBN

9780735446557

ISSN

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e-ISSN

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Number of pages

7

Pages from-to

"020005-1"-"020005-7"

Publisher name

AIP Publishing, APL, the American Institute of Physics

Place of publication

Melville, NY

Event location

Dalešice

Event date

Oct 4, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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