A computer simulation is performed on the effect of reducing the annual heating and cooling load by pasting films on the glass of the opening. Energy-saving standard area division 2 areas: Sapporo, 6 areas: Tokyo, 8 areas: Naha. Three types of films with high transmittance0.781、 medium transmittance0.418、 and small transmittance0.249 is pasted, A heat load calculation program(LESCOM-mint) is performed to reduce the annual load. Although the heating load increased slightly when the film is applied, the cooling load is greatly reduced. The following conclusion are obtained. 1. The effect of reducing the cooling load is in the order of low, medium, and high solar transmittance of the film. 2. In the region, only the cooling load in Naha has a large reduction effect. 3. Tokyo has a cooling load and heating load. Applying the film increases the heating load, but reduces the total cooling and heating load. 4. Sapporo also has a similar tendency to Tokyo, The total heating load is reduced, and there is an energy saving effect by attaching the film.

This study is based on the concept of dynamic steady-state concentration applied to an air recirculating system that treats the exhaust and return air and supplies it back into the room. We aimed to develop a tracer gas experimental method to determine the ventilation efficiency of the air supplied to the target room. In this report (Part 3), we show the procedure for age of air measurement using dynamic steady-state concentration. We confirmed in laboratory experiments that the dynamic steady-state concentration obtained when data collection is performed at an appropriate timing is equivalent to the age of air of the corresponding open-air system. Furthermore, a method for calculating the age of air distribution for multiple air recirculation systems is presented. Experimental verification and CFD analysis of the age of air distribution of the air supplied from two multi-split building air conditioners were performed in a real space where multiple multi-split building air conditioners are in operation. As a result, we confirmed that accurate age of air measurement is possible if data are collected at a timing of 1.0 to 1.5 times the nominal time constant associated to recirculating air flow rate. Furthermore, accurate age of air measurement is possible by manipulating the observed age of air distribution of each air recirculation system when performing age of air measurement for multiple air recirculating systems in real spaces.