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Determination of optimum network layout for low-energy district heating systems with different substation types

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Determination of optimum network layout for low-energy district heating systems with different substation types

Publication Date: 28.10.2011 |   Pages: 7-12
Tol, H.İ.1, Svendsen, S.1
1 Technical University of Denmark, Department of Civil Engineering, Section of Building Physics and Services, Brovej, Bygning 118, DK-2800, Kgs. Lyngby, Denmark
e-mail: hatol@byg.dtu.dk, ss@byg.dtu.dk

DOI: -

Abstract

In this paper three different District Heating (DH) network types, which comprise substations with storage tank and with instantaneous heat exchanger (each for domestic hot water production); and booster pumps installed in the beginning section of each street at the latter network type, are pointed out with comparisons given in the point of dimensions and energy efficiency of the DH network. Also, two different network layouts –branched network with bypasses, installed at the end-users, and looped network without bypasses–, which are used to prevent the excessive temperature drop in the supply line during summer months are presented with the focus given to comparison of them in the point of energy efficiency. Results of dynamic simulations, carried out in the Termis software by use of randomly generated heat demand scenarios based on simultaneity factor effect in each pipe segment of the DH network are reported.

Keywords

District Heating System, Low-Energy, Network Layout, Substation, Dynamic Analyses

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