抄録
In order to obtain the fundamental data on the thermal performance of semi-underground house, long-term field measurement using a twin-type test house constructed in the campus of Tohoku University in September, 1984 was made in two situations, one in which the rooms had weather shutters from soon after the construction to October 8, 1985, and the other in which there were no such shutters from November 1, 1985 to March 31, 1987. The first-year measurement without solar incident and second-year measurement with solar incident are designated "Experiment #1" and "Experiment #2", respectively. Results of Experiment #1 were already reported, and this paper describes results of Experiment #2. The results of measurement in the case of Experiment #2 are summarized as follows: (1) The amplitude of yearly fluctuation of room temperature is 0.5-0.6 times as large as that of outdoor temperature. The amplitude of one room with horizontal insulation in the earth was about 10 % smaller than that of the other room without such insulation. This reduction of the fluctuation was almost the same as that in case of Experiment #1. It implies that the reduction as the effect of horizontal insulation was not influenced so much by solar incident. (2) The mean room temperatures in the case of Experiment #2 were about 3℃ higher than those in the case of Experiment #1 due to the heat gain by solar incident.
