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Evaluation of a Parabolic Concentrating PVT System

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Author

Summary, in English

The purpose of this study was testing and performance simulation of an innovative tracking hybrid solar system being developed by the Swedish Company Arontis. The Solar8 collector produces both electrical and thermal energy in one system. Its performance was compared with conventional photovoltaic panels and solar thermal collectors working side-by-side which are already on the market. The solar8 sample tested in Lund is a prototype designed for small demonstration projects and further development is ongoing. The evaluation shows that the thermal collector has an overall heat loss coefficient of 3.1 W/(m2.ºC), an optical efficiency of 65% and an electrical efficiency at 25ºC of 8% per active glazed area. If we account the total glazed area instead, the thermal collector has an overall heat loss coefficient of 2.5 W/(m2.ºC), an optical efficiency of 52% and an electric efficiency at 25ºC of 6%. The electric efficiency of the bare cells is 16%. Annual performance simulations were carried out for the Swedish (Stockholm), Portuguese (Lisbon) and Zambian (Lusaka) climate. From the simulations one can conclude that: Solar8 can be replaced by a traditional PV-thermal collector side-by-side system using less space and producing the same electric and thermal outputs; tracking around one axis placed in North-South direction is considerably better then tracking around an axis set on East-West direction; the global irradiation on a static surface is always higher when compared with the beam irradiation towards a tracking concentrating surface; the ratio between electric and thermal output decreases when Solar8 is moved to the equator.

Publishing year

2008

Language

English

Publication/Series

Proceedings of the 7th EUROSUN Conference

Document type

Conference paper

Publisher

Curran Associates, Inc

Topic

  • Civil Engineering

Keywords

  • Solar8
  • Solar Hybrids
  • Photovoltaic Thermal Concentrators
  • PVT

Conference name

Eurosun, 2008

Conference date

2008-10-07 - 2008-10-10

Conference place

Lisbon, Portugal

Status

Published

Project

  • International Energy Agency. Solar Heating and Cooling Programme

Research group

  • Energy and Building Design

ISBN/ISSN/Other

  • ISBN: 9781617822285