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RESEARCH PAPERS

# A Two-Dimensional Model of a Double-Façade With Integrated Photovoltaic Panels

[+] Author and Article Information
R. Charron, A. K. Athienitis

Department of Building, Civil and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. West, Montreal, QC, H3G 1M8, Canada

J. Sol. Energy Eng 128(2), 160-167 (Dec 12, 2005) (8 pages) doi:10.1115/1.2188534 History: Received September 03, 2004; Revised December 12, 2005

## Abstract

Building integrated photovoltaic (PV) systems that include heat capture are more cost effective than PV systems that generate only electricity. This paper presents a two-dimensional control-volume model for a double-façade with integrated PV. The model may be employed to determine maximum PV temperature. Good agreement with a one-dimensional analytical model is obtained for air temperature rise. Experiments in Montreal showed that air temperatures could increase by $20°C$ when passing air through a $1m$ high façade section, and maximum PV temperatures of close to $50°C$ could be reached even in $−17°C$ weather for an air velocity of $0.6m∕s$. The highest uncertainty in PV temperature prediction is due to the values of convective heat transfer coefficients from the literature which are generally lower than observed values.

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## Figures

Figure 1

Two configurations of a double-façade with integrated PV

Figure 2

(a) Typical fluid control volume, (b) control volume of solid facing outside with solid element on the back side

Figure 3

Convective heat transfer coefficient in PV Section, calculated for Scenario 9 with 2D model

Figure 4

Air temperature profile in the front cavity, Scenario 6

Figure 5

(a) Temperature profiles in PV section from one- and two-dimensional models, Scenario 9, (b) temperature profiles in PV section from one- and two-dimensional models using the same average heat transfer coefficients in both models, Scenario 9

Figure 6

Calculated Spheral Solar PV temperatures using 1.9× calculated CHTC for Jan. 26th data

Figure 7

Calculated PV temperature using input CHTC

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