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

doi:10.1016/j.egypro.2016.06.282

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 proceeding › Conference contribution › peer-review

15 Citations (Scopus)

8 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 language	English
Title of host publication	Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)
Editors	B. Yesilata
Place of Publication	Amsterdam, Netherlands
Publisher	ELSEVIER SCIENCE BV
Pages	346-355
Number of pages	10
DOIs	https://doi.org/10.1016/j.egypro.2016.06.282
Publication status	Published - 2016
Event	4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015) - Istanbul, Turkey Duration: 2 Dec 2015 → 4 Dec 2015 Conference number: 4th

Publication series

Name	Energy Procedia
Publisher	Elsevier Science B. V.
Volume	91
ISSN (Print)	1876-6102

Conference

Conference	4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)
Abbreviated title	SHC 2015
Country/Territory	Turkey
City	Istanbul
Period	2/12/15 → 4/12/15

Keywords

control
hybrid
photovoltaic
reliability
stagnation
thermal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.egypro.2016.06.282Licence: CC BY-NC-ND

Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) SystemsFinal published version, 1.1 MBLicence: CC BY-NC-ND

Cite this

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). ELSEVIER SCIENCE BV. https://doi.org/10.1016/j.egypro.2016.06.282

Magalhães, Pedro M. L. P. ; Martins, João F. A. ; Joyce, António L. M. / Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems. Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015). editor / B. Yesilata. Amsterdam, Netherlands : ELSEVIER SCIENCE BV, 2016. pp. 346-355 (Energy Procedia).

@inproceedings{d3e7a8a4ad7446febf986e379e2e4dec,

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

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.",

keywords = "control, hybrid, photovoltaic, reliability, stagnation, thermal",

author = "Magalh{\~a}es, {Pedro M. L. P.} and Martins, {Jo{\~a}o F. A.} and Joyce, {Ant{\'o}nio L. M.}",

year = "2016",

doi = "10.1016/j.egypro.2016.06.282",

language = "English",

series = "Energy Procedia",

publisher = "ELSEVIER SCIENCE BV",

pages = "346--355",

editor = "B. Yesilata",

booktitle = "Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)",

note = "4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015), SHC 2015 ; Conference date: 02-12-2015 Through 04-12-2015",

}

Magalhães, PMLP, Martins, JFA & Joyce, ALM 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). Energy Procedia, vol. 91, ELSEVIER SCIENCE BV, Amsterdam, Netherlands, pp. 346-355, 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015), Istanbul, Turkey, 2/12/15. https://doi.org/10.1016/j.egypro.2016.06.282

Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems. / Magalhães, Pedro M. L. P.; Martins, João F. A.; Joyce, António L. M.

Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015). ed. / B. Yesilata. Amsterdam, Netherlands : ELSEVIER SCIENCE BV, 2016. p. 346-355 (Energy Procedia; Vol. 91).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems

AU - Magalhães, Pedro M. L. P.

AU - Martins, João F. A.

AU - Joyce, António L. M.

N1 - Conference code: 4th

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

KW - control

KW - hybrid

KW - photovoltaic

KW - reliability

KW - stagnation

KW - thermal

UR - http://www.scopus.com/inward/record.url?scp=85006014370&partnerID=8YFLogxK

U2 - 10.1016/j.egypro.2016.06.282

DO - 10.1016/j.egypro.2016.06.282

M3 - Conference contribution

AN - SCOPUS:85006014370

T3 - Energy Procedia

SP - 346

EP - 355

BT - Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)

A2 - Yesilata, B.

PB - ELSEVIER SCIENCE BV

CY - Amsterdam, Netherlands

T2 - 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015)

Y2 - 2 December 2015 through 4 December 2015

ER -

Magalhães PMLP, Martins JFA, Joyce ALM. Comparative Analysis of Overheating Prevention and Stagnation Handling Measures for Photovoltaic-thermal (PV-T) Systems. In Yesilata B, editor, Proceedings of the 4th International Conference on Solar Heating and Cooling for Buildings and Industry (SHC 2015). Amsterdam, Netherlands: ELSEVIER SCIENCE BV. 2016. p. 346-355. (Energy Procedia). https://doi.org/10.1016/j.egypro.2016.06.282

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

Abstract

Publication series

Conference

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this