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Techno-economic analysis of a novel solar thermal and air-source heat pump system
Dalarna University, School of Technology and Business Studies, Energy Technology.ORCID iD: 0000-0002-3201-8518
Dalarna University, School of Technology and Business Studies, Energy Technology.
2016 (English)Conference paper, Oral presentation with published abstract (Other (popular science, discussion, etc.))
Abstract [en]

This paper presents a techno-economic analysis of a novel solar thermal and air source heat pump system. The system was designed for relatively high operating temperatures in the space heating circuit and included the use of a heat pump with vapor injection cycle and vacuum insulation on the storage tank. The system model was validated against measurements in laboratory and simulated in TRNSYS 17. Annual simulations were performed for the combination of two climates (Carcassonne and Zurich) and two house standards (SFH45 and SFH100) and the best results were achieved for the boundary conditions the system was designed for. For those conditions (Zurich and SFH100), the novel system showed potential for being cost-effective compared to state of art solar and heat pump system. The “additional investment limit”, i.e. the maximum extra investment cost for the novel system in comparison to a state of art benchmark system that gives a break even result for a period of 10 years, varied between 827 € and 2482 € depending on electricity price. The results of a sensitivity analysis showed that variations in electricity price affected the additional investment limit far more than the other economic parameters

Place, publisher, year, edition, pages
2016.
Keywords [en]
solar thermal, heat pump, vapour injection
National Category
Energy Engineering
Research subject
Energy, Forests and Built Environments
Identifiers
URN: urn:nbn:se:du-22548OAI: oai:DiVA.org:du-22548DiVA, id: diva2:945381
Conference
16th International Refrigeration and Air Conditioning Conference, 11-14 July 2016, West Lafayette, USA
Funder
EU, FP7, Seventh Framework ProgrammeAvailable from: 2016-07-01 Created: 2016-07-01 Last updated: 2017-11-06Bibliographically 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, Stefano

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