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Energies 2016, 9(8), 555; doi:10.3390/en9080555

Monitoring and Analysing Changes in Temperature and Energy in the Ground with Installed Horizontal Ground Heat Exchangers

Department of Mechanical Engineering, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, Prague-Suchdol 165 21, Czech Republic
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Author to whom correspondence should be addressed.
Academic Editor: Vincent Lemort
Received: 10 May 2016 / Revised: 14 June 2016 / Accepted: 1 July 2016 / Published: 28 July 2016
(This article belongs to the Special Issue Advanced Heating and Cooling Techniques)

Abstract

The objective of this work was to monitor and analyse temperature changes in the ground with installed linear and Slinky-type horizontal ground heat exchangers (HGHEs), used as low-potential heat pump energy sources. Specific heat flows and specific energies extracted from the ground during the heating season were also measured and compared. The verification results showed that the average daily ground temperatures with the two HGHEs are primarily affected by the temperature of the ambient environment. The ground temperatures were higher than ambient temperature during most of the heating season, were only seldom below zero, and were higher by an average 1.97 ± 0.77 K in the ground with the linear HGHE than in the ground with the Slinky-type HGHE. Additionally, the specific thermal output extracted from the ground by the HGHE was higher by 8.45 ± 16.57 W/m2 with the linear system than with the Slinky system. The specific energies extracted from the ground over the whole heating season were 110.15 kWh/m2 and 57.85 kWh/m2 for the linear and Slinky-type HGHEs, respectively.
Keywords: ground; ground source heat pumps systems; heat pump; horizontal ground heat exchangers; specific heat flows; specific energies; temperatures ground; ground source heat pumps systems; heat pump; horizontal ground heat exchangers; specific heat flows; specific energies; temperatures
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pauli, P.; Neuberger, P.; Adamovský, R. Monitoring and Analysing Changes in Temperature and Energy in the Ground with Installed Horizontal Ground Heat Exchangers. Energies 2016, 9, 555.

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