Analysis of Fluid Velocity in Borehole Ground Heat Exchangers Connected in the Tichelmann System

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00372940" target="_blank" >RIV/68407700:21110/24:00372940 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/5.0200789" target="_blank" >https://doi.org/10.1063/5.0200789</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0200789" target="_blank" >10.1063/5.0200789</a>

Result language
angličtina
Original language name
Analysis of Fluid Velocity in Borehole Ground Heat Exchangers Connected in the Tichelmann System
Original language description
In this article, an analysis of the numerical results obtained during the design of ground heat exchangers (GHE) installation for a heat pump system, as well as the results of flow measurements in the installed system are presented. The GHE system consists of 24 vertical 100-meter U-tube probes made of PE-Xa material with a diameter of 40x3.7 mm. The system is connected in Tichelmann configuration. The correctly performed installation allows obtaining real operating parameters in accordance with the design assumptions. The Tichelmann connections of ground exchanger enable uniform glycol flows without the need for hydraulic balancing of the installation. The non-uniformity of the flow between the GHE loops is on average 18.8% in relation to the mean flow velocity of the glycol. The lack of throttling for control purposes translates into significantly lower hydraulic resistance of the ground heat exchanger installation, which in turn may translate into lower operating costs in the case of circulation pumps. Irrespective of the size of the stream pumped through the distribution lines, the flow of glycol through individual loops was also uniform.
Czech name
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Czech description
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Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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