District heat network as a short-term energy storage

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-06-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
293-303
Series
Energy (the International Journal), Volume 177, issue June
Abstract
In this article, we show how a revised district heat network control strategy can be employed to utilize the storage capabilities of the network. An optimization problem is formulated, with minimum operating costs as the objective. Allowing the district heat supply temperature to vary freely within given boundaries results in approximately 2% reduction in annual heat provision costs, in comparison to a reference control scheme in a case study. The benefits of added heat storage functionality in the network are greatest when there is a large difference between district heat generation costs from the available heat sources. In general, supply temperature optimization results in increased operational hours of those plants, whose variable costs are the lowest. (C) 2019 Elsevier Ltd. All rights reserved.
Description
Keywords
District heat, Energy storage, Optimization, Combined heat and power, SYSTEM, THERMAL INERTIA, OPTIMAL OPERATION, POWER-TO-HEAT, PUMPS, FLEXIBILITY, TECHNOLOGIES, INTEGRATION, FACILITATE, OPTIMIZATION
Other note
Citation
Kouhia , M , Laukkanen , T , Holmberg , H & Ahtila , P 2019 , ' District heat network as a short-term energy storage ' , Energy (the International Journal) , vol. 177 , no. June , pp. 293-303 . https://doi.org/10.1016/j.energy.2019.04.082