Search documents

Browse topics

Document details

Energy Performance Evaluation of a Photovoltaic Window
F. Serrano-Casares, V. Navas
a-Si, Building Integrated Photovoltaic (BIPV), PV, Window
PV Systems - Performance, Applications and Integration
Subtopic: Building, Infrastructure, Landscape and Other Applications of PV
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 6BV.1.26
1785 - 1789
ISBN: 3-936338-50-7
Paper DOI: 10.4229/35thEUPVSEC20182018-6BV.1.26
0,00 EUR
Document(s): paper, poster


The energy sector is in a process of radical and unstoppable transformation, motivated by two reasons: the fight against climate change and renewable energies. The two factors are decisive and go hand in hand, in line with the social demands and decisions of the European Union to comply with the emission reduction agreements. The growing increase in energy consumption in developed and developing countries is an important task that must be addressed by the economic policies of these countries. The percentage of energy consumption of buildings relative to the overall energy use has grown in the last years due to the increasing amount of electrical devices. The photovoltaic windows as an integrated system in the building façades can contribute to generate clean energy to meet needs of the inhabitants of these buildings. A photovoltaic window specially built by a manufacturer has been studied. An amorphous silicon photovoltaic module encapsulated between two transparent glass sheets, an air chamber and a second double glass sheet with an air chamber forms the photovoltaic window. Everything is framed in a PVC structure. The effective dimensions of the a-Si photovoltaic module are 0.57 m x 1.17 m, equivalent to a standard measurement of 0.60 m x 1.20 m. To know the electrical characteristics of PV window in standard test conditions, a test in accordance with IEC standard 61646 it was carried out. A peak power of 50.74 Wp was obtained. Measurements of energy production in real sunlight were carried out. The window was placed vertically facing south on a test bench. Measurements of the energy produced by the photovoltaic window were made in several sunny days of August and September 2016 from sunrise to sunset. On average, the irradiance received on the plane of the photovoltaic window was 4114 Wh/m2 and the energy produced 71.2 Wh each day. These results match those obtained using the Malaga radiation databases. For one square meter of the window studied, 79868 Wh/m2/year are obtained, when an overall efficiency of 0.8 is considered. Integrating this PV window in a building in Malaga (Spain), an annual electric production of 345030 kWh is obtained when a glazing surface of 4320 m2 is considered. This energy is enough to meet the annual electricity needs of the 68 household of the building. Furthermore, the saving in electricity bill of the houses of the building would be 59279 €/year and the BIPV system would avoid the emission of 240278 kg of CO2 into the atmosphere per year.