A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Lower Operating Temperatures in District Heating Networks - Consequences on the Distribution System
This report shows that lowered operating temperatures has most important influence on district heating networks with cellular concrete as thermal insulation. Here the drying process after drowning of the culvert is substantially prolonged. The ventilation of these old types of culvert is very seldom in order. For other types of thermal insulation, as mineral wool and polyurethan, the chemical degradation in presence of water and heat is faster at high temperatures than at low temperatures. In this case a lower temperature is favorable and decreases the risk of chemical attack on the steelpipe. A lower operating temperature has not been found to have any negative influence on pipes with polyurethan as thermal insulation. This is the most frequently used type of insulation on pipes for district heating purposes in Sweden nowadays. (With 18 refs.).
Lower Operating Temperatures in District Heating Networks - Consequences on the Distribution System
This report shows that lowered operating temperatures has most important influence on district heating networks with cellular concrete as thermal insulation. Here the drying process after drowning of the culvert is substantially prolonged. The ventilation of these old types of culvert is very seldom in order. For other types of thermal insulation, as mineral wool and polyurethan, the chemical degradation in presence of water and heat is faster at high temperatures than at low temperatures. In this case a lower temperature is favorable and decreases the risk of chemical attack on the steelpipe. A lower operating temperature has not been found to have any negative influence on pipes with polyurethan as thermal insulation. This is the most frequently used type of insulation on pipes for district heating purposes in Sweden nowadays. (With 18 refs.).
Lower Operating Temperatures in District Heating Networks - Consequences on the Distribution System
J. Molin (author) / R. Nilsson (author) / H. Bergstroem (author)
1988
70 pages
Report
No indication
English
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