Abstract
| 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 |
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Keywords
- district heat
- renewable energy
- thermal energy storage
- heat pump
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The role of heat storages in facilitating the adaptation of district heating systems to large amount of variable renewable electricity. / Hast, Aira; Rinne, Samuli; Syri, Sanna; Kiviluoma, Juha.
In: Energy, Vol. 137, No. May, 15.10.2017, p. 775-788.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - The role of heat storages in facilitating the adaptation of district heating systems to large amount of variable renewable electricity
AU - Hast, Aira
AU - Rinne, Samuli
AU - Syri, Sanna
AU - Kiviluoma, Juha
PY - 2017/10/15
Y1 - 2017/10/15
N2 - 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.
AB - 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.
KW - district heat
KW - renewable energy
KW - thermal energy storage
KW - heat pump
UR - http://www.scopus.com/inward/record.url?scp=85020385015&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2017.05.113
DO - 10.1016/j.energy.2017.05.113
M3 - Article
VL - 137
SP - 775
EP - 788
JO - Energy
JF - Energy
SN - 0360-5442
IS - May
ER -