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

• 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.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Husbyggnad (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Building Technologies (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

Twin heating pipe

Heat Conductivity

Experimental Measurements

Analytical Solution

Publikations- och innehållstyp

kon (ämneskategori)

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