Temperature of rooftop photovoltaic modules: Air gap effects

Bijay L. Shrestha, Ernie G. Palomino, G. TamizhMani

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

    7 Scopus citations

    Abstract

    Performance of photovoltaic (PV) modules decreases as the operating temperature increases. This performance drop is typically higher for the crystalline silicon technologies (∼0.5%/°C) as compared to thin film technologies (∼0.2%/°C). The temperature of rooftop modules in hot climatic locations like Arizona could be as high as 95°C depending on the air gap between the modules and roof surface. There are several thermal models existing to predict the temperatures of open-rack PV modules but no comprehensive thermal models have been reported for the rooftop PV modules/arrays based on an extended field monitoring. The primary goal of this work is to quantitatively model the influence of air gap on the temperature of rooftop modules so that the system integrators could improve their designs to maximize the overall energy output (kWh/kW) of the rooftop PV systems. To predict the temperature of rooftop PV modules/arrays based on irradiance, ambient temperature and wind speed conditions, this paper presents five thermal models for each of the five air gaps (0, 1, 2, 3 & 4 inches) investigated in this work.

    Original languageEnglish (US)
    Title of host publicationReliability of Photovoltaic Cells, Modules, Components, and Systems II
    DOIs
    StatePublished - Dec 1 2009
    EventReliability of Photovoltaic Cells, Modules, Components, and Systems II - San Diego, CA, United States
    Duration: Aug 3 2009Aug 6 2009

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume7412
    ISSN (Print)0277-786X

    Other

    OtherReliability of Photovoltaic Cells, Modules, Components, and Systems II
    CountryUnited States
    CitySan Diego, CA
    Period8/3/098/6/09

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • Cite this

    Shrestha, B. L., Palomino, E. G., & TamizhMani, G. (2009). Temperature of rooftop photovoltaic modules: Air gap effects. In Reliability of Photovoltaic Cells, Modules, Components, and Systems II [74120E] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7412). https://doi.org/10.1117/12.826413