抄録
Recently, the global environmental problem is one of the most imminent subjects. Useful application of solar energy systems, especially for residences, is expected from the viewpoint of environmental protection.
In this study, on the basis of exergy theory, evaluation is made of a photovoltaic/thermal hybrid panel, which can be applied to household use. In this panel photovoltaic modules are set on a flat-plate type solar collector.
In the first analysis, instantanious exergy characteristics are treated for three types of panels, a solar collector panel, a photovoltaic panel and the hybrid panel. Exergy efficiency of each panel is compared. As a result, it is found that the hybrid panel keeps high exergy efficiency in the range of from low to high intensity of solar radiation. Also optimum conditions of use are examined to get electricity and heat.
In the second analysis, yearly exergy characteristics are treated for them. In the countries where climate changes by season, like Japan, it is necessary to evaluate how much exergy output is got throughout the year. Using HASP climate data (new Tokyo), exergy analysis is made in considering monthly distribution of intensity of solar radiation and atomospheric temperature. As a result, it is clearly shown that the hybrid panel is superior to others in yearly exergy output.
