EFFICIENCY CHARACTERISTICS OF A BIPV SYSTEM IN HOT HUMID CLIMATIC CONDITIONS

摘要

The present paper deals with some studies on the efficiency performance of solar PV modules due toraise in temperature in hot and humid ambience in India. India is generally a hot country with various climaticconditions, except in few hilly areas. Coastal belts of the country are normally very hot and humid. Thus, due tochange in climatic condition the PV system efficiency varies from place to place to a considerable extent. Thisinfluences the power generation as well as storage mechanism of the BIPV system. In this paper a performanceevaluation have been carried out for a full year on a 450 WP PV power BIPV system placed on the north side windowfa?ade of a building. As a part of the system design, considerations have been taken in account on aesthetic, safety and cost aspects. The modules are mounted on the north side of the building, thus occasional shading occurred on the PV modules. This made the efficiency of the PV system lower that the peak rating of the cells and the modules. The rated efficiency of the modules was 14% as marked by the manufacturer. The yearly average system efficiency came of the order of 8.88% at an average ambient temperature of 26.88°C and module surface temperature of 27.96°C and at a relative humidity (RH) of 86.8%. The minimum efficiency observed was around 4.9% at the module surface of temperature of 35.4°C and at RH 90% in April-May. The maximum efficiency observed around 11.8% at the averagesurface temperature of 11.3°C and at RH of 70% in December-January. The studies have been made on the northside, which can be considered, as the worse situation. This can also be integrated to the other faces of the building to have a detailed power out put from the building throughout the year and indicate the design methodologies. The power generated from the building and power consumed by the building are the guiding parameter for the pay back period for the additional investment for the BIPV system. These studies justified on the implementation of BIPV system in urban areas of developing countries where peak load demand is very high.