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Influence of store dimensions and auxiliary volume configuration on the performance of medium-sized solar combisystems
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Institute of Thermal Engineering, University of Kassel.
Institute of Thermal Engineering, University of Kassel.
Institute of Thermal Engineering, University of Kassel.
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2010 (English)In: Solar Energy, ISSN 0038-092X, Vol. 84, no 7, 1095-1102 p.Article in journal (Refereed) Published
Abstract [en]

To increase the fractional energy savings achieved with solar thermal combisystems the store volume may be increased Installation of large stores in single-family houses is, however, often limited by space constraints In this article the influence of the store dimensions, as well as internal and external auxiliary volume configurations, are investigated for large solar water stores by annual dynamic TRNSYS simulations The results show that store sizes up to 4 m(3) may be used in solar heating systems with 30 m(2) collector area It is further shown that well-insulated stores are rather insensitive to the geometry Stores deviating from the conventional dimensions still yield high fractional energy savings Furthermore, the simulations show that the performance of an internal auxiliary volume configuration in most cases exceeds that of a solution with an external auxiliary unit The practical limitations of very thin auxiliary volumes must, however, be further investigated.

Place, publisher, year, edition, pages
2010. Vol. 84, no 7, 1095-1102 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-101291DOI: 10.1016/j.solener.2010.03.004ISI: 000279126500002OAI: oai:DiVA.org:uu-101291DiVA: diva2:212453
Available from: 2009-04-22 Created: 2009-04-22 Last updated: 2011-01-10Bibliographically 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.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 645
Series
Keyword
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
Identifiers
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)
Opponent
Supervisors
Available from: 2009-05-13 Created: 2009-04-22 Last updated: 2009-05-13Bibliographically approved

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