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Techno-economic analysis of combined heat pump and solar PV system for multi-family houses: An Austrian case study
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-7354-6643
AIT Austrian Inst Technol, Sustainable Thermal Energy Syst, Vienna, Austria..
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0002-2603-7595
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2021 (English)In: Energy Strategy Reviews, ISSN 2211-467X, E-ISSN 2211-4688, Vol. 36, article id 100666Article in journal (Refereed) Published
Abstract [en]

With the increasing amount of building renovations in Austria, the potential increases for replacing conventional national gas heating systems with heat pumps (HP) and thereby reduce CO2 emissions particularly when combined with solar photovoltaics (PV). The Austrian subsidization scheme for HP and PV systems are different for every state, creating confusion and inconstancy for potential adopters. This study provides a parametric technoeconomic analysis of PV + HP systems to identify the critical economic parameters on profitability and make policy recommendations. A case study in Vienna is modelled using demand from the Building Model Generator and black box efficiency models for the HP and PV simulated with hourly time steps. The results show that both air-source and ground source heat pumps are currently profitable with PV under current subsidy schemes. The benefit-to-cost ratio (BCR) is highly influenced by capital costs and subsidies, however natural gas prices have the greatest influence. Increasing natural gas prices by 0.01 euro/kWh, or 17%, is enough to replace all other complicated subsidies for both HP and PV. This is equivalent to a carbon emissions price of 33 euro/ton and could result in a reduction of CO2 emissions in multi-family houses by approximately 45%-60%.

Place, publisher, year, edition, pages
Elsevier BV , 2021. Vol. 36, article id 100666
Keywords [en]
Solar energy, Heat pumps, Systems analysis, Sustainable subsidies
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-299695DOI: 10.1016/j.esr.2021.100666ISI: 000678404500011Scopus ID: 2-s2.0-85109458890OAI: oai:DiVA.org:kth-299695DiVA, id: diva2:1585852
Note

QC 20210818

Available from: 2021-08-18 Created: 2021-08-18 Last updated: 2022-06-25Bibliographically approved

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Schreurs, TwanMadani Larijani, HatefSommerfeldt, Nelson

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