Abstract
In the future energy system, it is likely that there is
more variation in the electricity prices due to higher
share of renewable energy sources in electricity
production. In this paper, the effects of more variable
electricity prices were analyzed in a district heating
(DH) system that includes both combined heat and power
(CHP) plant, fired mainly by biomass and heat only
boilers. The most cost optimal dimensioning and
combination of heat storages, heat pumps and solar
collectors are searched in three future electricity price
scenarios. When the impacts of different system
components were analyzed separately, it was found that
especially a larger heat storage (1% of annual DH energy)
is economical. In addition, the results indicate that the
most economical size for a heat pump is around 20% of
peak heat demand. Yet, the most profitable solution was
to include both a heat storage and a heat pump in the DH
system. According to our results, solar collector was not
a profitable investment in the studied DH system.
| Original language | English |
|---|---|
| Pages (from-to) | 775-788 |
| Number of pages | 14 |
| Journal | Energy |
| Volume | 137 |
| Issue number | May |
| DOIs | |
| Publication status | Published - 15 Oct 2017 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- district heat
- renewable energy
- thermal energy storage
- heat pump
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Cite this
Hast, A., Rinne, S., Syri, S., & Kiviluoma, J. (2017). The role of heat storages in facilitating the adaptation of district heating systems to large amount of variable renewable electricity. Energy, 137(May), 775-788. https://doi.org/10.1016/j.energy.2017.05.113