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Techno-economic review of solar heat pump systems for residential heating applications
Dalarna University, School of Technology and Business Studies, Energy Technology. KTH.ORCID iD: 0000-0002-3201-8518
Dalarna University, School of Technology and Business Studies, Energy Technology.
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2018 (English)In: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 81, p. 22-32Article in journal (Refereed) Published
Abstract [en]

Solar heat pump systems (SHPs) have been investigated for several decades and have been proven to increase the share of renewable energy and reduce electric energy demand in residential heating applications. Many review articles have been published on the subject, however literature discussing the techno-economics of different solar technologies (thermal, photovoltaic and hybrid thermal/photovoltaic) in combination with heat pumps is lacking, and thus to directly compare the merits of different SHPs is not an easy task. The objectives of this study are: a) review the different system boundaries and the main performance indicators used for assessing energetic and economic performances; b) review techno-economic studies in the literature and identify which studies give enough information and are compatible enough for making an economic inter-comparison; c) present an economic inter-comparison based on the identified systems. The results show that there is a lack of studies including an economic assessment of solar photovoltaic and heat pump systems. Additionally, there are no consistent boundaries or approaches to the study structures, making comparisons between systems difficult. In conclusion, a standardized or broadly accepted definition of technical and economic performance for SHPs is needed. Despite this, the study has shown that there are clear trends for decreasing payback times for SHPs, both solar thermal (ST) and photovoltaic (PV), with decreasing heating degree-days and with increasing solar resource.

Place, publisher, year, edition, pages
2018. Vol. 81, p. 22-32
Keywords [en]
Performance indicators, Solar heat pump systems, System boundary, System configuration
National Category
Energy Engineering
Research subject
Energy, Forests and Built Environments
Identifiers
URN: urn:nbn:se:du-25649DOI: 10.1016/j.rser.2017.07.041ISI: 000417070500002Scopus ID: 2-s2.0-85024839540OAI: oai:DiVA.org:du-25649DiVA, id: diva2:1128866
Available from: 2017-07-31 Created: 2017-07-31 Last updated: 2018-03-26Bibliographically approved
In thesis
1. Solar heat pump systems for heating applications: Analysis of system performance and possible solutions for improving system performance
Open this publication in new window or tab >>Solar heat pump systems for heating applications: Analysis of system performance and possible solutions for improving system performance
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Solar heat pump systems (SHPs) are systems that combine solar energy and heat pumps. SHPs have been investigated for several decades and have been proven to increase the share of renewable energy and reduce electric energy demand in residential heating applications. Many solar thermal heat pump systems have become market-available in recent years; however these systems are still not widely employed in the residential sector. This is due mainly to the high initial costs (investment and installation costs) of solar thermal heat pump systems, which limits their cost-effectiveness. Enhancing cost-effectiveness of solar thermal heat pump systems is necessary for a more effective and broader market penetration.

In this thesis, solar thermal and photovoltaic systems combined with heat pumps for heating applications are treated. The overall aims of the thesis are to: 1) investigate techno-economics of SHPs and 2) investigate possible solutions for improving system performance of a reference solar thermal and heat pump system for residential heating applications.

In the first part of the thesis, the influence of climatic boundary conditions on economic performance of SHPs has been investigated by means of: a) an economic comparison of SHPs found in the relevant literature and b) system simulations of the reference solar thermal heat pump system.

In the second part of the thesis, potential solutions for improving system performance of the reference solar thermal heat pump system with limited change in system’ costs are investigated. A systematic approach was used for investigating cost-effectiveness of the system improvements in the reference system.

Based on results of the cost-effectiveness analysis, some of the investigated system improvements were chosen for being included in the design of a novel solar thermal and air source heat pump system concept. The novel system was designed for a house standard with relatively high operating temperatures (55°C/45°C) in the space heating distribution system and for high space heating demand (123 kWh/m2·year). Finally, the thesis ends with a cost-effectiveness analysis of the novel system.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017
National Category
Environmental Engineering
Research subject
Energy, Forests and Built Environments, MacSheep
Identifiers
urn:nbn:se:du-26498 (URN)978-91-7729-526-6 (ISBN)
Public defence
2017-10-09, 14:26
Opponent
Supervisors
Available from: 2017-11-06 Created: 2017-11-06 Last updated: 2017-11-06Bibliographically approved

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Poppi, StefanoBales, Chris

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