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Technical Briefs

A Coupled Electrical and Thermal Model for Photovoltaic Modules

[+] Author and Article Information
G. Tina

Dipartimento di Ingegneria Elettrica Elettronica e dei Sistemi, University of Catania, Viale A. Doria n.6, 95125 Catania, Italy

J. Sol. Energy Eng 132(2), 024501 (May 04, 2010) (5 pages) doi:10.1115/1.4001149 History: Received May 11, 2009; Revised December 06, 2009; Published May 04, 2010; Online May 04, 2010

A coupled electrical and thermal model for calculating the temperature of a photovoltaic (PV) module has been developed and implemented in a simulation tool. The input data for this model include both environmental parameters (ambient temperature, wind speed, wind direction, total irradiance, and relative humidity) and electrical variables (voltage and current). In particular, this paper discusses the impact of the electrical operating point on the PV module temperature. This information can be very useful, especially in optimizing hybrid PV/thermal system operation. Numerical and experimental results are presented.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Layers (1—glass, 2—EVA+PV cells, and 3—substrate) and temperature representation in the PV module

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Figure 2

Comparison between a measured I-V curve and I-V curves calculated using the proposed models (A, B, and C): error evaluations (measured current Im and calculated current Ic). Vmmp is the voltage measured at the maximum power point

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Figure 3

The solar irradiance behavior of the electrical parameters, which includes the series resistance Rs and the shunt resistance Rsh

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Figure 4

Measured and calculated temperatures in the PV module layers

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