JAUE2012-037: Research of Thermal Environment in the Japanese Traditional Style Eco House

Abstract

Context: "Tashibu house" is designed to permit the residents to live without using air conditioner in summer having "dirt floor" and "clay wall". These are one of Japanese traditional constructions and have large heat capacity but don't have sufficient heat insulating properties.
Approach: We searched thermal environment of Tashibu house in summer 2010 year. We set data loggers in the house and analyzed. Additionally we conducted a night purge experiment from 13 to 15 September.
Result & Conclusion: In Tashibu house, the interior temperature was lower more than 5 degrees than outside in the daytime summer. In adittion, the night purge experience shows the lifestyle to live in the housing which is insulated and has large heat capacity. That is the combination of 3 devices. The first is cooling down interior temperature which rose in the day in night by night purge. The second is long eaves sufficiently to cut off radiation and keep low temperature to the next day. The third is Japanese "sudare" and "yosizu" to cut off reflected radiation heat by outside concrete surface and first floor's roof.