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Swedish solar heated residentialarea with seasonal storage in rock: Initial evaluation
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
CIT Energy Management AB.
2008 (English)In: Renewable energy, ISSN 0960-1481, Vol. 33, no 4, 703-711 p.Article in journal (Refereed) Published
Abstract [en]

A partly solar heated building area comprising 50 residential units has been built in Anneberg, Sweden. The system includes low-temperature space heating with seasonal ground storage of solar heat. Heating is supplied by 2400 m(2) solar collectors and individual electrical heaters for supplementary heating. The ground storage comprises about 60,000 m(3) of crystalline rock with 100 boreholes drilled to 65 m depth and fitted with double U-pipes. The collectors will have favourable working conditions but the store is rather small, the estimated heat loss from the beat store is about 40% of stored solar heat and the average solar fraction is estimated to 70% after 3-5 years of operation. An initial evaluation after 2 years of operation shows that, although problems have occurred and several parts seem to work less efficient than expected, the overall system idea works as intended.

Place, publisher, year, edition, pages
2008. Vol. 33, no 4, 703-711 p.
Keyword [en]
Solar thermal, Solar collector, Borehole storage, Seasonal storage, Low-temperature heating
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-101283DOI: 10.1016/j.renene.2007.03.024ISI: 000252997100018OAI: oai:DiVA.org:uu-101283DiVA: diva2:212439
Available from: 2009-04-22 Created: 2009-04-22 Last updated: 2010-01-16Bibliographically approved
In thesis
1. Domestic Heating with Solar Thermal: Studies of Technology in a Social Context and Social Components in Technical Studies
Open this publication in new window or tab >>Domestic Heating with Solar Thermal: Studies of Technology in a Social Context and Social Components in Technical Studies
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Research in solar heating has traditionally focused solely on increasing the system efficiency by improving the technical components. In this thesis the technical methodology and system boundaries are widened to connect the technical aspects with market actors that are highly influential on the implementation of solar technology.

The research was focused on how social aspects can be brought into technical studies to improve the understanding of solar heating, and how solar thermal technology can be optimized in a larger energy system. Both heat storage and different system solutions have been investigated. The thesis is built on a number of sub-projects exploring different aspects of solar heating.

Improved components and system configurations may result in higher fractional energy savings and thereby make solar energy go from a marginal contribution to be the main energy supplier. Both components and systems are considered in this thesis. The solar heating technology has been shown to work well, also in unique system solutions. Technical possibilities with medium-sized stores for single-family houses and seasonal stores for residential areas are presented. Methods to bring studies of technology and actor studies together are also proposed; domestic hot water use has been modelled based on time-use data, while a multifaceted market situation, in which new system solutions must find their way, has been described by the solar and pellet industries. The complexity of assessing installation and use of a particular heating system in relation to the overall energy system is also discussed.

Overall, this thesis shows that successful use of solar heating does not only come down to proper technical solutions, but also depends on the interaction between technology and market actors. A widened perspective, including the social context in which the heating system appears, is then essential. This thesis constitutes a step in that direction.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2009. 101 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 645
solar heating, solar energy, heating system, social components, market actors, interdisciplinary, heat storage, system solution, energy system, hot water, load profiles, socio-technical
National Category
Other Engineering and Technologies
Research subject
engineering science with specialization in microsystems technology
urn:nbn:se:uu:diva-101325 (URN)978-91-554-7531-4 (ISBN)
Public defence
2009-06-05, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:15 (English)
Available from: 2009-05-13 Created: 2009-04-22 Last updated: 2009-05-13Bibliographically approved

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