抄録
We have ivestigated numerically the effect of thermal insulation on the thermal environment of vehicle cabin to reduce the air conditioning load of vehicle in summer time. Double insulation structure is considered using thin insulator (phenolic foam) at the roof of the vehicle in the present study. Thickness of the insulator we have investigated is 10 to 50 mm. At the insulation thickness of 30 mm, temperature increase in vehicle cabin is reduced by 85.7% compared with normal case (no insulation). In addition, at the insulation thickness of 10mm, temperature increase compared with normal case is reduced by 78.3% when thermal conductivity of the insulator is reduced by 5%.
