An analytical method for calculating the thermal conductivity of a twin pipe in district heating system

Vahid M. Nik, Bijan Adl-Zarrabi

Research output: Contribution to conferencePaper, not in proceedingpeer-review

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Abstract

In this paper a simple analytical method is introduced for calculating the overall thermal conductivity of a twin pipe in district heating network. The method is developed based on calculating the conductive and convective heat transfer around the casing pipe in different perimetral sections. Temperature inside the supply and return pipes and also over the heating pipe is measured on different points. These data are imported to a computer program which was written to calculate the heat loss and the total conductivity of the heating pipe. The method has shown good agreement with measurements and it is simple and quick enough in calculating the thermal conductivity of asymmetric- geometries and their temperature distribution. The method is capable to make calculations for more complicated geometries, such as heating pipes with heterogeneous insulating materials.
Original languageEnglish
Pages517-524
Number of pages8
Publication statusPublished - 2014
Event10th Nordic Symposium in Building Physics - Lund University, Lund, Sweden
Duration: 2014 Jun 152014 Jun 19
http://www.nsb2014.se/

Conference

Conference10th Nordic Symposium in Building Physics
Abbreviated titleNSB2014
Country/TerritorySweden
CityLund
Period2014/06/152014/06/19
Internet address

Subject classification (UKÄ)

  • Building Technologies
  • Energy Engineering

Keywords

  • Twin heating pipe
  • Heat Conductivity
  • Experimental Measurements
  • Analytical Solution

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