Acta Mechanica Slovaca 2018, 22(2):48-53 | DOI: 10.21496/ams.2018.017

Heat loss Calculations of Underground Central Heating Pipelines

Pavel Sláma1, Jiří Nožička1
1 doplniť prosím

The article subject is the experimental temperatures measurements on the thermal areas surrounding the preinsulated district heating pipes, located below the ground surface. The heating pipes are located in to the sand filling. The results of the mentioned experiment are applied for supplementation and modification proposals of the equations used for determination of the heat losses from the heat pipelines. The article copes with the thermal conductivity of the pipe insulation material in dependence on the temperature, the thermal conductivity of the non-homogeneous surrounding filling material in the space around the pipe and the periodic function of the temperature at the specific depth of the semi-infinite space. The result is the design modifications of the conventional computational procedures and codes.

Keywords: District heating, Thermal conductivity, Heat loss, PUR, Insulation, Temperature measurement.

Published: June 15, 2018  Show citation

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Sláma, P., & Nožička, J. (2018). Heat loss Calculations of Underground Central Heating Pipelines. Acta Mechanica Slovaca, 22(2), 48-53. doi: 10.21496/ams.2018.017
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    References

    1. EN 489:2009. District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene. European Committee for Standardization. Brussels.
    2. Bohm, B., Kristjansson, H.: Single, twin and triple buried heating pipes: on potential savings in heat losses and costs. International Journal of Energy Research, page 1301-1312, July 18, 2005, Wiley InterScience, DOI: 10.1002/er.1118, Go to original source...
    3. EN 13941:2009+A1:2010. Design and installation of preinsulated bonded pipe systems for district heating. European Committee for Standardization. Brussels.
    4. EN ISO 12241:2008. Thermal insulation for building equipment and industrial installations - Calculation rules.
    5. Brož, K.: Zásobování teplem. ČVUT, Praha 1997, 217 p., ISBN 80-01-01587-4
    6. Claesson, J., Dunand, A.: Heat extraction from the ground by horizontal pipes - a mathematical analysis. Swedish Council for Building Research, Spangebergs Tryckerier AB, Stockholm 1983. 215 p., ISBN 91-540-3851-0
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