Determining the actual temperature of the side of a borehole heat exchanger

• Autorzy: Złotkowski A. , Druzgała A.

Identyfikatory

DOI

10.7494/drill.2017.34.4.855

• Języki publikacji: EN

Abstrakty

EN

Borehole heat exchangers (BHE) are made as hydraulic systems consolidated by cement slurry in boreholes. They mediate in heat exchange between the receiver on the surface (heat pump), and the reservoir of thermal energy (rock mass). In the analytical description of temperature changes accompanying energy download and return to the rock mass, the temperature of the entire borehole heat exchanger is assumed to be the same. In fact, the exchanger temperature changes both in the vertical and horizontal cross-sectional view of the exchanger. Accordingly, the temperature of the interface of the hardened cement slurry and the rock mass differs from the one which was adopted for design calculations. The article shows the differences between the theoretical and actual state, when the temperature was measured with a thermal imaging camera. It also includes suggestions regarding the mathematical description of temperature changes on the side surface of the heat exchanger. Measurements were made by a model of a BHE equipped with a single U-tube.

Słowa kluczowe

EN

borehole heat exchangers; cement slurry

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: AGH Drilling, Oil, Gas
• Rocznik: 2017
• Tom: Vol. 34, no. 4
• Strony: 855--864
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Złotkowski A.

• AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland

autor

Druzgała A.

• AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Kraków, Poland

Bibliografia

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• [3] Gonet A., Śliwa T., Stryczek S., Sapińska-Śliwa A., Jaszczur M., Pająk L., Złotkowski A.: Methodology for the identification of potential heat of the rock mass along with technology implementation and operations of the borehole heat exchangers, Wydawnictwa AGH, Kraków 2010.
• [4] Rubik M.: Pompy ciepła. Wydawnictwo Instal, Warszawa 2006.
• [5] Śliwa T., Gonet A., Złotkowski A.: Górotwór jako rezerwat ciepła (Rockmass as heat reservoir). Nowoczesne Budownictwo Inżynieryjne, nr 6, 2007, pp. 12–14.
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• [8] Złotkowski A., Gonet A., Śliwa T.: Borehole heat exchangers field for heating-airconditioning installation in Spa Hotel OSSA. Drilling, Oil, Gas, no. 1–2, vol. 28, 2011, pp. 475–482.
• [9] Złotkowski A., Gonet A., Śliwa T.: Heating and cooling system with borehole heat exchangers in Ecological Education and Leisure Park OSSA, no. 7–8, vol. 42, 2011, pp. 291–301.
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).