WIT Press


Drag Reducing Effects In District Heating Networks

Price

Free (open access)

Volume

39

Pages

9

Published

2000

Size

781 kb

Paper DOI

10.2495/URS000241

Copyright

WIT Press

Author(s)

A. Krope, J. Krope & L. Crepinsek

Abstract

In this paper the simulation of flow-pressure conditions in the pipe network by the transport of hot water only and hot water with added surfactant additive Dobon G / NaSal for a part of the district heating system of city Maribor is presented. With small amounts of cationic surfactants in district heating water the turbulence intensity in pipes is decreased and the pressure drop in pipelines is reduced significantly. Application of drag reducing additives in existing systems reduces pumping costs and increases the capacity. New district heating networks can be designed with smaller pipe diameters and pumps with reduced pump power or the maximum economic transmission length can be increased with the application of surfactants. The mathematical model is composed

Keywords