We propose a method to estimate floor temperatures from a few surrounding sensors using neural networks. It is difficult for VAV air-conditioning control systems to measure the temperatures in residential areas. They usually control air temperatures at spurting according to the temperatures of ceilings only. However, the comfort is reduced when the difference in temperature between a VAV and the residential area is large. This comfort can be improved if the floor temperature near a living area is available. In this study, we achieved sufficient prediction accuracies without using many sensors, indicating that only a few sensors are sufficient for the highly accurate estimation of floor temperatures. We also examined the significance of each measurement. For instance, solar radiation was shown to have significant effect on improving the estimation accuracy. Finally, we clarified the optimal network structure.

We observed the summer temperature, humidity, and wind in the Handa canal area, located at the coastal city of the Aichi Prefecture. We studied the climatic environment of the Handa canal area by means of a comparison between Handa and AMeDAS data and evaluated thermal comfort in the summer. The results indicated that the climatic environment tends in the Handa canal area were low temperature and high humidity with a sea breeze. Compared with the number of hours in the indoor environmental standard for temperature and humidity, the values for the Handa canal area became lower than those for Nagoya as summer approached. Regarding thermal comfort on sunny summer days, Handa canal area was found to provide a higher level of comfort than Nagoya because Handa canal area had stronger winds than Nagoya. In addition, we compared the temperature, humidity, and wind between places in a building with outside air intake and representative regional points. According to the results, the wind direction and velocity at the place with outside air intake were greatly affected by the shape of the building, but the temperature and humidity were not so different.

This study aimed to develop a numerical method to analyze fluid and heat transfer for heat supply to buildings, and to evaluate the control characteristics of valve opening control, which is a variable water volume control method that does not use differential pressure proposed by the authors in a previous study. Numerical analysis was conducted for three buildings with different heat load patterns, assuming heat supply for heating. The analysis results clarified the appropriate operational range of valve opening control. Valve opening control was also shown to be more effective in reducing the conveyance power than the conventional variable water volume control method using differential pressure.

In this study, to investigate the applicability of slightly acidic hypochlorous acid water for deodorization , methanethiol (CH₃SH) and trimethylamine ((CH₃)₃N) removal carried out using slightly acidic hypochlorous acid water. First, in order to investigate the effect of slightly acidic hypochlorous acid water on a small scale, a gas removal experiment using a washing bottle was conducted. By comparing the results with the cases of hydrochloric acid, sodium hydroxide, and sodium hypochlorite, slightly acidic hypochlorous acid water was confirmed to be most effective. Next, to examine the applicability of slightly acidic hypochlorous acid water on a real scale, a deodorizing system was constructed using a slightly acidic hypochlorous acid water production device and a packed bed scrubber with an air volume of 3 m³/min. One-pass gas removal efficiencies of 80% for CH₃SH and 90% for (CH₃)₃N were obtained. Thus, a pplicability of slightly acidic hypochlorous acid water for deodorization was confirmed.

This paper analyzes the design specifications of air conditioning heat source and conveyance systems by collecting information inputted into a calculation program to confirm compliance with building energy codes (Web program) for non-residential buildings that were evaluated using the "standard input method," which is a detailed evaluation method. Specifically, this paper clarifies the average values and distributions of the following: air transfer efficiency of air handling units, adoption rate of variable air volume control and minimum air volume ratio, design temperature difference, water transfer efficiency, adoption rate of number control and variable flow control of the secondary pump system, water transfer efficiency of primary pumps, air transfer efficiency of cooling tower fans, and water transfer efficiency of cooling water pumps.

In order to reduce the energy consumption of air conditioners in commercial buildings, we developed a water heat source network system consisting of a multi-split type air-conditioning system separating latent and sensible heat. We first developed a water heat source makeup air unit that applied a low-temperature desorption-type desiccant rotor. In our first report, we confirmed high performance through unit tests. In this report, we constructed an air-conditioning system that treats latent and sensible heat separately by combining the water heat source makeup air units and the high-sensible heat treatment units. We then performed system performance evaluation tests and system simulations. As a result, we experimentally confirmed that the system COP can improve by approximately 25% in the summer. In addition, simulation results confirmed that it is necessary to perform a system linked operation of the water heat source makeup air units and the high-sensible heat treatment units and control the number of devices to extract the potential of the system.