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

Nik, Vahid M. LU and Adl-Zarrabi, Bijan (2014) 10th Nordic Symposium in Building Physics p.517-524
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
Twin heating pipe, Heat Conductivity, Experimental Measurements, Analytical Solution
pages
8 pages
conference name
10th Nordic Symposium in Building Physics
language
English
LU publication?
yes
id
58731063-293c-4ddf-87ec-435de1b05175
date added to LUP
2017-03-07 19:01:13
date last changed
2017-05-16 14:20:58
@misc{58731063-293c-4ddf-87ec-435de1b05175,
  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.},
  author       = {Nik, Vahid M. and Adl-Zarrabi, Bijan},
  keyword      = {Twin heating pipe,Heat Conductivity,Experimental Measurements,Analytical Solution},
  language     = {eng},
  pages        = {517--524},
  title        = {An analytical method for calculating the thermal conductivity of a twin pipe in district heating system},
  year         = {2014},
}