empowered by: ku leuven, vito, imec & uhasselt
TRANSCRIPT
Empowered by: KU Leuven, VITO, imec & UHasselt
Presentation of the Façade BIPV Set-Ups Solsthore – Activity 5 - PV Systems for Large Roof Surfaces and Façade Integration
Description• Building Integrated PV (BIPV): solar photovoltaic cells/modules integrated in the building envelope, replacing conventional building materials
• Integrating PV causes higher temperature that can lead to an efficiency drop & reliability failures -> Needs layout providing ventilation
• Three façade BIPV set-ups were installed on a south-west façade of a test building • Thermal, electrical and weather measurements for in-depth characterisation were performed• Aim: impact of ventilation, encapsulant colour, cell technology (mono-facial vs bifacial, advanced metallisation & passivation), validation of electrical and thermal modelling
• Future façades installed in Energyville 2: over 50m² of façades oriented East, South or West
ResultsFaçade 1 & Façade 2: • Ventilated modules perform better due to reduced module temperature
• White encapsulant perform better than black encapsulant due to increased light absorption
• Bifacial cells with advanced metallisation & passivation have an improved power production
• Transparent bifacial modules have a higher energy production• Only a small effect of glass thickness on dynamic thermal response was noted
Façade 3: • Efficient cooling leads to a limited degradation of the performances
• Working on the integration of a micro-inverter in the frame
• Façade 1: 9-cells mini modules: impact of ventilation, encapsulant colour, glass thickness
• Facade 2: 9-cells mini modules: impact of ventilation, encapsulant colour, cell technology (bifacial cells with advanced metallization & passivation)
• Façade 3: fully integrated BIPV ventilated curtain wall façade combining a commercially available 60 cells PV module with an industrial frame
• The façades are used to validate multi-physics BIPV models (electrical and thermal behaviour)
• All façades are based on monocrystalline Si and glass-glass modules
• Data available: over 1,5 yr. for façade 1, 0.5 yr. for façades 2 & 3
Picture of the three façades installed in Leuven
Comparison of energy production for façade 1 & 2 on 5 months
Façade 3 Façade 2 Façade 1