Features of equipment, system and facilities

The “versatile design protocol” was invented and developed for calculating power output based on solar radiation conditions where the system is to be installed. Emergency signs and lights were designed and installed in areas such as Showa Kinen Park.

Calculating available solar irradiation and power output

•	Direct solar radiation is measured by placing a (computer graphic) image of the sun’s path on to a fish-eye lens image of the sky at the place where the system is to be installed.
•	The amount of dispersed light is measured by placing the cobweb-shaped mesh on to the image and reading the number of meshes open to the sky.
•	The amount of direct and dispersed light and accordingly the power output based on this are calculated using regional meteorological data and the above-mentioned solar radiation conditions.
•	It is possible to calculate power output at any time or day throughout the year using meteorological data.

Design flexibility

•	The sign in Showa Kinen Park was designed using the versatile design protocol, and as a result, the solar cells were arranged facing alternate directions so that the total power output does not depend on the direction in which the system is installed.

Optimum design for office buildings and residential areas

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The versatile design protocol enables design of shape and system that quantitatively assesses the impact of sunlight obstructions. It exhibits its strength in the design and installation of solar cell structures in the urban environment where there are many sunlight obstructions, and also of medium and large solar cell structures of complex shapes.

Fish-eye lens image and solar radiation conditions