mdh.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Decentralised heat supply in district heating systems: Implications of varying differential pressure
Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.ORCID-id: 0000-0003-1965-0532
Lunds universitet, Sverige.
Lunds universitet, Sverige.
2014 (Engelska)Ingår i: Proceedings from the 14th International Symposium on District Heating and Cooling September, 6-10, 2014 Stockholm, SWEDEN ISBN 978-91-85775-24-8 / [ed] Anna Land, Swedish District Heating Association, 2014Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

There is a rising interest for the integration of decentralised heat supply in district heating (DH) systems in the form of so-called prosumers, i.e., customers that both can withdraw and supply heat to the grid. The interest comes from a growing interest in local energy supply among owners of property as well as a growing awareness among DH companies about the need to view their customers more like partners rather than just consumers of heat.In a previous study, decentralised solar heat plants in Sweden were mapped out and their performance were evaluated. In general, the performance in terms of delivered heat was at least 20% lower than expected. The main reason for this is deficiencies regarding the feed-in of theheat to the grid, caused by an inability of the control system to handle the variation of the differential pressure between the supply and the return pipe in the DH network. These variations, caused mainly by the rapid load fluctuations caused by consumption of domestic hot water, has so far been overlooked when designing the control system.

This paper describes and pins down this problem with support from measurements and simulations of differential pressure.There are different ways to connect decentralised heat supply, where a primary return/supply connection is the most common, implying the heat being added to the DH water before the customer's substation or directly to the DH supply pipe. Although the field study-objects utilise solar energy, it must be emphasised that the results from the project will be of general interest for any type of decentralised heat supply, e.g. surplus heat from local cooling machines or industrial processes. Suggestions for improved control strategies is given in the paper and future work will aim to support them.Keywords: Prosumers, decentralised heat supply, differential pressure, return/supply connec

Ort, förlag, år, upplaga, sidor
2014.
Nyckelord [en]
Prosumers, decentralised heat supply, differential pressure, return/supply connection
Nationell ämneskategori
Energiteknik
Identifikatorer
URN: urn:nbn:se:mdh:diva-33966OAI: oai:DiVA.org:mdh-33966DiVA, id: diva2:1049661
Konferens
The 14th International Symposium on DH and Cooling, September 7th to September 9th, 2014, Stockholm, Sweden
Tillgänglig från: 2016-11-25 Skapad: 2016-11-25 Senast uppdaterad: 2016-12-12

Open Access i DiVA

fulltext(556 kB)214 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 556 kBChecksumma SHA-512
d5522f7bde737e83667b35634789ea735be320d2d825302eaeb86e72bf2ee5d0ad840b95c414a8fd5155a2fbc58e5fed216c429209965e4c33a23e3582a7b27a
Typ fulltextMimetyp application/pdf

Sök vidare i DiVA

Av författaren/redaktören
Lennermo, Gunnar
Av organisationen
Framtidens energi
Energiteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 214 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 1042 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf