Multiple measurement methods of net air volume rate of heat exchangers defined in the previous paper were tested for five commercially available units. Significant differences of identified net air volume rate were observed among the tested units according to the fan position in each unit. Net air volume rate would be affected by the duct length and pressure balance, and airflow network model of total heat exchanger unit was then developed. Consequently, following results were obtained. ・Net air volume rate decreases due to the increase in the pressure loss of outdoor side in both supply air and exhaust air. ・Increase in the pressure loss on outdoor side especially in supply air significantly reduces net air volume rate and net air volume. ・Decrease of the net air volume rate caused by the decrease of pressure loss of indoor side in supply air is compensated and results in the increase of net air volume.

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This paper describes field experiments concerning development of a hybrid energy system using a micro cogeneration and renewable energy in cold regions. First, a PC energy pile system with a built-in U-tube was developed in order to reduce the cost of underground thermal system. Second, the operating results of actual measurements of the underground thermal energy system with an auxiliary boiler showed that the average fluid return temperature from the ground was 8.7℃, and that the stable performance could be obtained. In addition, the field experiment of the electric power, hot-water supply and snow melting using a micro cogeneration and underground thermal energy system was carried out. It was found that freezing of a road surface was prevented by the only underground thermal energy except severe climatic conditions. It is confirmed that the ground temperature at the depth of 8m was maintained 10℃ and over, and that the stable amount of heat was obtained. By adding the exhaust heat from the cogeneration system, the fluid supply temperature to the roadbed rose 1-2℃, and the percentage of the exhaust heat was approximately 60%.

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The monthly energy consumption in the residential sector of nine cities in Kyushu and Okinawa regions were estimated by using statistical data on family income and expenditures and by using retail price surveys provided by the Statistical Bureau of Japan. By using the estimated values of energy consumption, the authors studied on the influence of the weather variables on the residential energy consumption. Based on the results of regression analyses, the authors presented simple models that use the monthly mean air temperature as input data for predicting monthly electricity and gas consumption per household. Additionally the authors studied on the influence of population density on the gas consumption and presented a multi-regression model of gas consumption rate, which uses the monthly mean air temperature and population density as explanatory variables.

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A glass is used as a baseplate material of the Liquid Crystal Display (LCD). In the next generation, the measures for both the particles and the organic contaminants are necessary for the high-density of LCD devices. The surface moisture has an influence on the adsorption of the organic contaminant. In this study, Amount of adsorbed water on the surface of a glass for the high temperature Poli-Silicon TFT were investigated by using atmospheric pressure ionization mass spectroscopy (APIMS). The samples of glass were exposed to the argon gas atmosphere which adds the moisture in the clean space. We decided BET adsorption isotherm by analysis of the results which was experimented in low humidity environment (14-1000ppb). It was shown that the amount of water adsorbed onto the glass surface in low humidity environment at 10ppb level was under 1ng/cm^2. In addition, we investigated the state of the glass surface with the Atomic Force Microscope (AFM), estimated the unevenness of the surface.

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