PT  - JOURNAL ARTICLE
AU  - Sláma, Pavel
AU  - Nožička, Jiří
TI  - Heat loss Calculations of Underground Central Heating Pipelines
DP  - 2018 Jun 15
TA  - Acta Mechanica Slovaca
PG  - 48--53
VI  - 22
IP  - 2
AID - 10.21496/ams.2018.017
IS  - 13352393
AB  - 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.