Abstract

Double Skin Façade (DSF) has been widely used in buildings to enhance energy efficiency and bring daylight and aesthetic benefits. Solar photovoltaic (PV) modules can be integrated in DSF to fully or partially meet the electricity demand. Therefore, in this study, the energy performance of a 3-storey PV-DSF building is analyzed for three cities of Iran with distinctive climates namely Tehran, Tabriz and Kish Island considering different orientations, cavity widths and different optical properties for the PV system. The results indicated that the south facing PV-DSF have the maximum electricity generation and the minimum net electricity consumption. With increase in cavity width from 0.4 to 1.2 m, the annual electricity consumption is reduced by 5.88, 5.19 and 7.49 MWh for Tehran, Tabriz and Kish, respectively. The cavity width tends to have negligible impact on electricity generation. The analysis of the outer PV skin showed that the glazing with lower Solar Heat Gain Coefficient (SHGC) offers more energy saving benefits for all the considered cities.

Highlights

  • Double Skin Facades (DSF) have been widely used in buildings to boost energy performance, maintain indoor thermal comfort and bring daylight and aesthetic benefits [1]

  • Peng et al investigated the energy saving potential of PV-DSF in Mediterranean climate using EnergyPlus software developed by US Department of Energy, and showed that nearly 65 kWh per unit area electricity can be annually produced by PV-DSF [3]

  • 58 MWh to 65 MWh for Tehran, from 52 MWh to 56 MWh for Tabriz and from 78 MWh to 85 MWh for Kish island according to PV-DSF orientation

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Summary

Introduction

Double Skin Facades (DSF) have been widely used in buildings to boost energy performance, maintain indoor thermal comfort and bring daylight and aesthetic benefits [1]. Photovoltaic materials can be integrated in DSFs to further enhance thermal performance and directly generate electricity [2]. The efficiency of PV-DSF is decided by climatic conditions and design parameters. A few studies are available on PV-DSF. Peng et al investigated the energy saving potential of PV-DSF in Mediterranean climate using EnergyPlus software developed by US Department of Energy, and showed that nearly 65 kWh per unit area electricity can be annually produced by PV-DSF [3]. The thermal performance of a PV-DSF was experimentally analyzed considering various ventilation modes [4]. It was revealed that non-ventilated PV-DSF minimizes the heat loss while the ventilated one has the minimum solar heat gain coefficient

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