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Control of decentralised solar district heating
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Energianalys AB, Alingsås, Sweden.
Lund university, Sweden.
Halmstad university, Sweden.
2019 (English)In: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 179, p. 307-315Article in journal (Refereed) Published
Abstract [en]

The purpose of decentralised solar district heating plants is to feed solar heat directly into district heating networks. This decentralised heat supply has to consider two major output conditions: a stable required feed-in supply temperature and a feed-in heat power equal to the heat output from the solar collectors. However, many installations cannot achieve the second output condition, since severe oscillations appear in the feed-in heat power. This problem can be solved by two different control concepts with either temperature- or flow-control. Detailed measurements from two reference plants are provided for these two different control concepts. One main conclusion is that a robust control system is characterized by the ability to provide required flows and temperatures. The major difference between robust and less robust control is that the supply temperatures and/or flows do not fluctuate even if the input conditions are unfavourable. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 179, p. 307-315
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-42298DOI: 10.1016/j.solener.2018.12.080ISI: 000458942300029Scopus ID: 2-s2.0-85059474876OAI: oai:DiVA.org:mdh-42298DiVA, id: diva2:1277480
Available from: 2019-01-10 Created: 2019-01-10 Last updated: 2019-03-07Bibliographically approved

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Lennermo, Gunnar

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