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Energies 2014, 7(2), 972-987; doi:10.3390/en7020972
Article

Temperatures and Heat Flows in a Soil Enclosing a Slinky Horizontal Heat Exchanger

* ,
 and
Department of Mechanical Engineering, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague-Suchdol, Czech Republic
* Author to whom correspondence should be addressed.
Received: 20 November 2013 / Revised: 22 January 2014 / Accepted: 12 February 2014 / Published: 24 February 2014
(This article belongs to the Special Issue Geothermal Energy: Delivering on the Global Potential)
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Abstract

Temperature changes and heat flows in soils that host “slinky”-type horizontal heat exchangers are complex, but need to be understood if robust quantification of the thermal energy available to a ground-source heat pump is to be achieved. Of particular interest is the capacity of the thermal energy content of the soil to regenerate when the heat exchangers are not operating. Analysis of specific heat flows and the specific thermal energy regime within the soil, including that captured by the heat-exchangers, has been characterised by meticulous measurements. These reveal that high concentrations of antifreeze mix in the heat-transfer fluid of the heat exchanger have an adverse impact on heat flows discharged into the soil.
Keywords: heat pump; heat-transfer fluid; ethanol; heating season; thermal characteristics; energy consumption; specific energy heat pump; heat-transfer fluid; ethanol; heating season; thermal characteristics; energy consumption; specific energy
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.

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MDPI and ACS Style

Neuberger, P.; Adamovský, R.; Šeďová, M. Temperatures and Heat Flows in a Soil Enclosing a Slinky Horizontal Heat Exchanger. Energies 2014, 7, 972-987.

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