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Article

EU Emission Targets of 2050: Costs and CO2 Emissions Comparison of Three Different Solar and Heat Pump-Based Community-Level District Heating Systems in Nordic Conditions

1
VTT Technical Research Centre of Finland Ltd., Vuorimiehentie 3, 02150 Espoo, Finland
2
Department of Mechanical Engineering, School of Engineering, Aalto University, 02150 Espoo, Finland
3
College of Urban Construction, Nanjing Tech University, Nanjing 211816, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(16), 4167; https://doi.org/10.3390/en13164167
Received: 20 July 2020 / Revised: 6 August 2020 / Accepted: 10 August 2020 / Published: 12 August 2020
(This article belongs to the Special Issue Energy Performance and Indoor Climate in Buildings)
In Finland, old apartments (1980s) contribute toward emissions. The objective is to reduce CO2 emissions to reach Europe’s targets of 2050. Three different centralized solar-based district heating systems integrated either with non-renovated or renovated old buildings in the community were simulated and compared against the reference city-level district heating system. The three proposed centralized systems were: Case 1: photovoltaic (PV) with a ground source heat pump (GSHP); Case 2: PV with an air-water heat pump (A2WHP); and Case 3: PV with A2WHPs, seasonal storage, and GSHPs. TRNSYS simulation software was used for dynamic simulation of the systems. Life cycle cost (LCC), CO2 emissions and purchased electricity were calculated and compared. The results show that the community-level district heating system (Case 3) outperformed Case 1, Case 2, and the city-level district heating. With non-renovated buildings, the relative emissions reduction was 83% when the reference energy system was replaced with Case 3 and the emissions reduction cost was 3.74 €/kg.CO2/yr. The relative emissions reduction was 91% when the buildings were deep renovated and integrated with Case 3 when compared to the reference system with non-renovated buildings and the emission reduction cost was 11.9 €/kg.CO2/yr. Such district heating systems could help in meeting Europe’s emissions target for 2050. View Full-Text
Keywords: PV and heat pump-based centralized district heating system; district heating CO2 emissions; seasonal storage; community scale solutions; old apartment buildings renovation; Nordic conditions PV and heat pump-based centralized district heating system; district heating CO2 emissions; seasonal storage; community scale solutions; old apartment buildings renovation; Nordic conditions
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MDPI and ACS Style

Rehman, H.u.; Hirvonen, J.; Jokisalo, J.; Kosonen, R.; Sirén, K. EU Emission Targets of 2050: Costs and CO2 Emissions Comparison of Three Different Solar and Heat Pump-Based Community-Level District Heating Systems in Nordic Conditions. Energies 2020, 13, 4167. https://doi.org/10.3390/en13164167

AMA Style

Rehman Hu, Hirvonen J, Jokisalo J, Kosonen R, Sirén K. EU Emission Targets of 2050: Costs and CO2 Emissions Comparison of Three Different Solar and Heat Pump-Based Community-Level District Heating Systems in Nordic Conditions. Energies. 2020; 13(16):4167. https://doi.org/10.3390/en13164167

Chicago/Turabian Style

Rehman, Hassam u., Janne Hirvonen, Juha Jokisalo, Risto Kosonen, and Kai Sirén. 2020. "EU Emission Targets of 2050: Costs and CO2 Emissions Comparison of Three Different Solar and Heat Pump-Based Community-Level District Heating Systems in Nordic Conditions" Energies 13, no. 16: 4167. https://doi.org/10.3390/en13164167

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