Comparison of modeled and experimental PV array temperature profiles for accurate interpretation of module performance and degradation

Teri Elwood, Kelly Potter

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

1 Citation (Scopus)

Abstract

Quantification of the effect of temperature on photovoltaic (PV) module efficiency is vital to the correct interpretation of PV module performance under varied environmental conditions. However, previous work has demonstrated that PV module arrays in the field are subject to significant location-based temperature variations associated with, for example, local heating/cooling and array edge effects. Such thermal non-uniformity can potentially lead to under-prediction or over-prediction of PV array performance due to an incorrect interpretation of individual module temperature de-rating. In the current work, a simulated method for modeling the thermal profile of an extended PV array has been investigated through extensive computational modeling utilizing ANSYS, a high-performance computational fluid dynamics (CFD) software tool. Using the local wind speed as an input, simulations were run to determine the velocity at particular points along modular strings corresponding to the locations of temperature sensors along strings in the field. The point velocities were utilized along with laminar flow theories in order to calculate Nusselt's number for each point. These calculations produced a heat flux profile which, when combined with local thermal and solar radiation profiles, were used as inputs in an ANSYS Thermal Transient model that generated a solar string operating temperature profile. A comparison of the data collected during field testing, and the data fabricated by ANSYS simulations, will be discussed in order to authenticate the accuracy of the model.

Original languageEnglish (US)
Title of host publicationReliability of Photovoltaic Cells, Modules, Components, and Systems X
PublisherSPIE
Volume10370
ISBN (Electronic)9781510611979
DOIs
StatePublished - Jan 1 2017
EventReliability of Photovoltaic Cells, Modules, Components, and Systems X 2017 - San Diego, United States
Duration: Aug 6 2017Aug 7 2017

Other

OtherReliability of Photovoltaic Cells, Modules, Components, and Systems X 2017
CountryUnited States
CitySan Diego
Period8/6/178/7/17

Fingerprint

Temperature Profile
temperature profiles
Degradation
modules
degradation
ANSYS
Module
strings
Strings
profiles
flow theory
Temperature
software development tools
ratings
Heat radiation
thermal radiation
temperature sensors
Temperature sensors
solar radiation
Edge Effects

Keywords

  • Computational modeling
  • Heat flux profile
  • Photovoltaic
  • Photovoltaic array operating temperature
  • Solar string operating temperature
  • Temperature profile
  • Thermal flux model
  • Thermal transient model

ASJC Scopus subject areas

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

Cite this

Elwood, T., & Potter, K. (2017). Comparison of modeled and experimental PV array temperature profiles for accurate interpretation of module performance and degradation. In Reliability of Photovoltaic Cells, Modules, Components, and Systems X (Vol. 10370). [1037006] SPIE. https://doi.org/10.1117/12.2274146

Comparison of modeled and experimental PV array temperature profiles for accurate interpretation of module performance and degradation. / Elwood, Teri; Potter, Kelly.

Reliability of Photovoltaic Cells, Modules, Components, and Systems X. Vol. 10370 SPIE, 2017. 1037006.

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

Elwood, T & Potter, K 2017, Comparison of modeled and experimental PV array temperature profiles for accurate interpretation of module performance and degradation. in Reliability of Photovoltaic Cells, Modules, Components, and Systems X. vol. 10370, 1037006, SPIE, Reliability of Photovoltaic Cells, Modules, Components, and Systems X 2017, San Diego, United States, 8/6/17. https://doi.org/10.1117/12.2274146
Elwood, Teri ; Potter, Kelly. / Comparison of modeled and experimental PV array temperature profiles for accurate interpretation of module performance and degradation. Reliability of Photovoltaic Cells, Modules, Components, and Systems X. Vol. 10370 SPIE, 2017.
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