Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems

Pedro M. L. P. Magalhães, João F. A. Martins, António L. M. Joyce

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)
1 Downloads (Pure)

Abstract

The stagnation temperatures experienced by glazed photovoltaic-thermal (PV-T) collectors pose a threat to their performance and longevity, in part due to the limited temperature stability of ethylene vinyl acetate (EVA) encapsulants. In order to identify suitable solutions for application in residential solar domestic hot water (SDHW) PV-T systems, a comparative analysis of known overheating prevention and stagnation handling measures was conducted and dynamic simulations were used to support the analysis. While no measure was found to comply with all desirable goals including reliability, implementation and operation costs, integral venting mechanisms were identified as the most promising among the control systems reviewed. Moreover, active collector heat dumping and automatic collector shading led to minimal electrical efficiency increases and decreases, respectively, while purging tank water when the collector overheats was found to be ineffective due to delays in the start of circulation.

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)
EditorsB. Yesilata
Place of PublicationAmsterdam, Netherlands
PublisherELSEVIER SCIENCE BV
Pages346-355
Number of pages10
DOIs
Publication statusPublished - 2016
Event4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015) - Istanbul, Turkey
Duration: 2 Dec 20154 Dec 2015
Conference number: 4th

Publication series

NameEnergy Procedia
PublisherElsevier Science B. V.
Volume91
ISSN (Print)1876-6102

Conference

Conference4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)
Abbreviated titleSHC 2015
CountryTurkey
CityIstanbul
Period2/12/154/12/15

Keywords

  • control
  • hybrid
  • photovoltaic
  • reliability
  • stagnation
  • thermal

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    Magalhães, P. M. L. P., Martins, J. F. A., & Joyce, A. L. M. (2016). Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems. In B. Yesilata (Ed.), Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015) (pp. 346-355). (Energy Procedia; Vol. 91). Amsterdam, Netherlands: ELSEVIER SCIENCE BV. https://doi.org/10.1016/j.egypro.2016.06.282