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Appreciating Performance of a BIPV Lab in Bangalore (India)
M. Mani, G. Aaditya, N.C. Balaji
Thermal Performance, Ventilation, Energy Performance, Building Integrated PV
PV Applications and Integration
Subtopic: PV in Buildings and the Environment
Event: 32nd European Photovoltaic Solar Energy Conference and Exhibition
Session: 6AV.5.24
2769 - 2774
ISBN: 3-936338-41-8
Paper DOI: 10.4229/EUPVSEC20162016-6AV.5.24
0,00 EUR
Document(s): paper, poster


A BIPV (Building Integrated Photovoltaic) is essentially PV integrated as a building envelope (roof, wall, façade, and fenestration) regulating indoor thermal comfort and generating on-site energy. Tropical regions are solar rich (>4 kWH/m2/day) and generally warmer (20~30°C) and impose a specific need for preventing indoor heat build-up and increased natural ventilation. Roofs have been found to be the single largest contributor of indoor heat gain, and with PV integration this gain is amplified due to low thermal mass and higher radiation. This results in a stratified temperature gradient between the (PV) roof and the floor below in conjunction with a higher natural buoyancy of warm air below the PV panel. In tropical conditions, PV performance is characterized by higher a higher operating temperature that is generally detrimental to its efficiency and aggravates indoor heat buildup when integrated as the roof. The interplay between indoor thermal comfort and PV performance needs to be carefully investigated particularly the influence of stratified indoor temperature on thermal comfort and the natural buoyancy induced ventilation on PV performance. The current study is an experimental investigation into a 5.25 kWp roof integrated BIPV lab (see Figure 1) located at the campus of the Indian Institute of Science, Bangalore (India).