Selecting optimal pipeline diameters for a district heating network comprising branches and rings, using graph theory and cost minimization

• Autorzy: Murat J. , Smyk A. , Laskowski R.
• Języki publikacji: EN

Abstrakty

EN

Choosing the right pipeline diameter is essential for both newly designed district heating (DH) networks and existing ones undergoing upgrades. A multi-stage optimization algorithm was developed for the purpose of selecting optimal diameters of pipelines in a DH network that has a complex layout including branches and rings. The DH network was represented as a set of graphs and then as matrices, which made hydraulic and heat-and-flow calculations possible for any network layout. The optimization algorithm was developed as a Visual Basic program consisting of 37 macros. The program considers hydraulic resistances, heat-balance equations, capital expenditure for DH pipelines of 32 to 1,100 mm in diameter, and the operating cost, including the costs of heat transmission losses and DH water pumping. Microsoft Excel’s Solver tool was used to solve the non-linear optimization algorithm with constraints. To provide an example of the program’s application, the paper includes calculations used to verify the correctness of selected diameters for part of an existing DH network in a large DH system in Poland.

Słowa kluczowe

EN

district heating networks; heat cost; optimum pipe diameter; graph theory

PL

sieci ciepłownicze; koszty ogrzewania; średnica rury; teoria grafów

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2018
• Tom: Vol. 98, nr 1
• Strony: 30--44
• Opis fizyczny: Bibliogr. 55 poz., rys., tab., wykr.

Twórcy

autor

Murat J.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Poland

autor

Smyk A.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Poland

autor

Laskowski R.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).