The role of heat storages in facilitating the adaptation of district heating systems to large amount of variable renewable electricity

Aira Hast, Samuli Rinne, Sanna Syri, Juha Kiviluoma

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

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 languageEnglish
Pages (from-to)775-788
Number of pages14
JournalEnergy
Volume137
Issue numberMay
DOIs
Publication statusPublished - 15 Oct 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Heat storage
District heating
Electricity
Solar collectors
Pumps
Cogeneration plants
Boilers
Biomass
Hot Temperature
Costs

Keywords

  • district heat
  • renewable energy
  • thermal energy storage
  • heat pump

Cite this

@article{7e813ce74fbc458e9137d397e5b922e1,
title = "The role of heat storages in facilitating the adaptation of district heating systems to large amount of variable renewable electricity",
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.",
keywords = "district heat, renewable energy, thermal energy storage, heat pump",
author = "Aira Hast and Samuli Rinne and Sanna Syri and Juha Kiviluoma",
year = "2017",
month = "10",
day = "15",
doi = "10.1016/j.energy.2017.05.113",
language = "English",
volume = "137",
pages = "775--788",
journal = "Energy",
issn = "0360-5442",
publisher = "Elsevier",
number = "May",

}

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 journalArticleScientificpeer-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 -