The aim of the present study is to clarify an evaluation structure for privacy that takes both visual and auditory senses into account. First, the perceptions of visual privacy that is the feeling of being watched regardless of whether or not someone is looking at you, were examined, followed by a similar examination of auditory privacy, to further clarify the evaluation structure of privacy perceptions that take both visual and auditory privacy into account. The final goal is to obtain insight into a broader definition of privacy that can be applied to combined visual and auditory privacy.
Spectral calculation is required in the design of high-quality lighting environments. Therefore, we showed the measurement results of the spectral directional reflection characteristics of building materials, and modeled them mathematically, which are the necessary input data for the spectral calculation. It was a heavy load to handle a huge amount of data for each wavelength obtained by spectral radiance measurement. Thus, we proposed a simplified method to estimate the spectral directional reflection characteristics of building materials by a simplified method to measure the overall directional reflection characteristics was extended to spectral measurements.
Assuming the use of excess daytime electricity, we built and verified a model that can predict, using neural network, how to control a floor heating system with PCM installed during the daytime to reduce nighttime electricity consumption while still providing a comfortable temperature range. The results confirmed the effectiveness of PCM in reducing floor surface temperature and room temperature, and showed that it can be predicted more accurately than multiple regression analysis by ANN. In addition, it was suggested that excess electricity during the daytime could be utilized to reduce CO2 emissions.
In this paper, a method for estimating thermal resistance applicable to various shapes, thermal conductivities, and specimen thicknesses in complicated shape insulation foam was investigated. Thermal resistance was calculated by CFD simulations that reproduced the conditions measured by calibrated hot box method for specimen models with different volume loss, thermal conductivity, and specimen thickness. Based on the results, a calculation formula for estimating thermal resistance was discussed. It was confirmed that the estimated value by the calculation formula corresponds to the measured value in JIS A 1420 and the calculated value in JIS A 9521.
When air-conditioning for cooling is used in room with hygroscopic material, humidity control due to the hygroscopic material affects heat load. Indoor humidity conditions and energy conservations to air-conditioning are thereby variable. To calculate an efficient range of using cooling and hygroscopic material, this study examined influence of air-conditioning temperature and environmental condition on moisture control and energy conservation effects based on numerical calculation. As the result, range of effects based on every condition and causes of their variations were obtained.
In this paper, capture efficiency of range hoods is measured for boiling water and non-boiling salad oil at 100℃ . The influence of difference in thermal updraft over a pot with and without boiling at the same temperature on capture efficiency is discussed. Analytical conditions for CFD using RANS to consider effect of boiling water on thermal updraft are studied.
The difference of capture efficiency between experiments and CFD is 7.5 to 14.6 points for CFD model without considering effect of boiling, and 1.4 to 7.3 points for CFD model proposed in this paper.
The applicability of the Momentum method in unsteady CFD analysis linked with real time measurement is verified based on indoor analysis. Reflecting the time change of the total air volume of the air conditioning and correcting the IoT-compatible wind speed sensor and setting it as a boundary condition are a major factor in matching the analysis results with the actual measurement results. As a result of comparing the unsteady CFD analysis applying the Momentum method with the normal unsteady CFD analysis, the overall room temperature change over time and the vertical temperature distribution are almost the same.