Kozo Takase

STUDY ON DIRECT SOLAR GAIN SYSTEM IN HOUSES CONSIDERING SPECTRAL PROPERTIES OF SOLAR RADIATION

Direct solar gain system to get solar heat directly from the windows is often adopted in houses. On the other hand, if the amount of solar heat gain and thermal mass is not proportionate, this system will not work well. We proposed the blind which reflects near-infrared range upward and transmits visible light. It can distribute acquired solar heat to indoor thermal mass adequately. We evaluated the direct gain system using this blind by experiment and simulation. It is confirmed that the system could improve indoor thermal environment and contribute to energy saving.

THE RESULT OF EXPERIMENTAL RESIDENCE IN LCCM DEMONSTRATION HOUSE

Recently, not only running CO2 consumption but also initial CO2 reduction has been important. In Japan, LCCM (Life cycle carbon minus) is a keyword of sustainable buildings. In LCCM buildings, many efforts to reduce CO2 (such as high thermal insulation, high efficient equipment, and so on) are adopted and Photovoltaic system can return more amount of CO2 than CO2 which is consumed in buildings. According to such principal, LCCM demonstration house were built in 2011. We have checking the performance of this house by experimental residence.