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Essential Improvements in Future District Heating Systems
Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).ORCID iD: 0000-0003-2885-0923
Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.ORCID iD: 0000-0001-9069-0807
2016 (English)In: Proceedings of the 15th International Symposium on District Heating and Cooling: September 4th - 7th, 2016, Seoul, South Korea / [ed] Rolf Ulseth & Kyung Min Kim, 2016, 194-200 p.Conference paper, (Refereed)
Abstract [en]

The major common denominator for future efficient fourth generation district heating systems is lower temperature levels in the distribution networks. Higher efficiencies are then obtained in both heat supply and heat distribution. Heat supply becomes more efficient with respect to combined heat and power, flue gas condensation, heat pumps, geothermal extraction, low temperature excess heat, and heat storage. Heat distribution becomes more efficient from lower distribution losses, less pipe expansion, lower scalding risks, and plastic pipes. The lower temperature levels will be possible since future buildings will have lower temperature demands when requiring lower heat demands. This paper aims at providing seven essential recommendations concerning design and construction strategies for future fourth generation systems. The method used is based on a critical examination of the barriers for lower temperature levels and the origins of high return temperatures in contemporary third generation systems. The two main research questions applied are: Which parts of contemporary system design are undesirable? Which possible improvements are desirable? Key results and the corresponding recommendations include temperature levels for heat distribution, recirculation, metering, supervision, thermal lengths for heat exchangers and heat sinks, hydronic balancing, and legionella. The main conclusion is that it should be possible to construct new fourth generation district heating networks according to these seven essential recommendations presented in this paper.

Place, publisher, year, edition, pages
2016. 194-200 p.
Keyword [en]
Low-temperature, system design, recirculation, thermal lengths, hydronic balancing
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:hh:diva-32003OAI: oai:DiVA.org:hh-32003DiVA: diva2:970468
Conference
The 15th International Symposium on District Heating and Cooling, September 4-7, 2016, Seoul, Republic of Korea (South Korea)
Projects
Future District Heating Technology
Funder
Swedish Energy Agency, 41302-1
Available from: 2016-09-13 Created: 2016-09-13 Last updated: 2017-01-13Bibliographically approved

Open Access in DiVA

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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