Abstract
In recent years, buildings have tended to be taller, and their energy potential is expected be used effectively . Photovoltaics is considered one of technologies affected by air temperature, outside air velocity, and solar radiation from the aerological climate of supertall buildings with a height of 390 m. The energy potential of the “height” of photovoltaic power generation systems is affected by two factors: aerological climate and shadows cast by surrounding buildings. Taking these effects into account, the predicted annual power generation amount was calculated. At 390 m above ground, it was confirmed that the power generation amount was greater than that on the ground, when considering the effectiveness of photovoltaic systems. Then, we calculated the predicted annual power generation amount on each wall and roof surface of a tall building with a height of 390 m above the ground. By evaluating the energy-saving effect of adopting photovoltaic systems, we evaluated the photovoltaic system using the wall surface from the viewpoint of the primary energy reduction and primary energy consumption of the building.
Highlights
In recent years, buildings have become taller, and are expected to effectively utilize the potential energy possessed by the "height" of a supertall building. [1]
For photovoltaic power generation systems in a supertall building, efficient power generation can be achieved by increasing the power generation amount according to the influence of aerological climate and shadows cast by surrounding buildings
The annual power generation amount in each direction of the wall surface and roof surface of a supertall building 390 m above ground, taking into account the improvement in photovoltaic power generation efficiency owing to both aerological climate and shadow effects, is calculated to determine the energy-saving effect of adopting photovoltaic systems as the primary energy source of buildings
Summary
Buildings have become taller, and are expected to effectively utilize the potential energy possessed by the "height" of a supertall building. [1]. Buildings have become taller, and are expected to effectively utilize the potential energy possessed by the "height" of a supertall building. It is thought that a tall building and a supertall building can function as a vertical city, but their usefulness, efficiency, etc., are unknown. In a previous report [2], we calculated the energysaving effect when adopting small wind power generation, free cooling, and a cooling system utilizing outside air. We evaluate the possibility of adopting a photovoltaic system by comparing a supertall building with a height of 390 m that is expected to be completed in 2027 and a tall building with a height of 60 m, in which applications for structural performance evaluation of tall buildings are required (in Japan).
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