Energy generation properties of PV arrays installed on side walls of a building located in Hokuriku region

摘要

This paper deals with two kinds of PV systems for a location along the coast of the Japan sea and discusses their feasibility by simulating yearly generated energies and comparing them with measured data. The two kinds of PV systems were instailed as the NEDO field test project in 1999 at Shirouma Science Co. Ltd., located in Toyama. One system is a 10kWp PV array installed on the north, south, east and west walls of a building and the other is a 10kWp PV array installed on a roof of a parking lot Both of them are composed of light - weighted PV modules without glass cover. Firstly, simulation of the yearly generated energy on the building walls and parking lot is carried out using meteorological data for Toyama and Tokyo. There is almost not difference in yearly generated energies for the two kinds of PV systems between Tokyo and Toyama. Secondly, the snow effect on generated energy in winter season is simulated. The generated energy is considerably increased by snow effect for the PV arrays installed on the building walls. Especially, the generated energy is increased near to 3 times for the PV array installed on the north wall. This suggests that the PV array n the north wall in a snowy country is practical compared to that in Tokyo.