PYRAMID-SHAPED PV SYSTEM ON THE ROOF OF HIGH BUILDING - WITH OBSERVATIONS ON THE NORTH FACE -

摘要

To develop a new site for PV system in the center of big city, the roof floor of high-rise building is examined. To share this space with building machines, innovative Pyramid-shaped PV array, which cover building machines working as a "shed", allowing the multi-use of the roof floor, is developed. Its feature includes Development of new site for PV system in the city center, Exterior improvement of the roof floor, Durability improvement of the machines. Field test system of 80kWp is established and now in operation in the center of Tokyo. Observations have continued for 3 seasons. Some data from its 4-surfaces of different directions, east, south, west and north, are presented. Solar radiation on each face, compared with the one on horizontal plane, is illustrated, where, on the north face, it decreases considerably in spring and autumn. Conversion efficiency of sub-array on each face is compared to each other, where the north face shows distinctive and low value.