Shizuo Iwamoto

Simulation study on energy conservation performance for integrated external louver facades

The authors previously proposed integrated-facade-systems comprising different types of external louvers integrated with buckling restraint braces. The systems can be applied to both new and existing buildings, paying attention to the building’s appearance, upgraded structural performance and indoor environment. The authors have studied indoor daylight conditions with louver facades and a research paper was published in this journal (Misawa, Hikone, Nakamura, Iwamoto, Iwata, 2014). This research study reports on the energy conservation performance of louver facades and proposes an External Shading Coefficient (ESC) for external louver systems. Situations with five external louver facades and no louvers, facing three facade orientations (East, South and West) are examined. The year-round ESC is simulated every hour using Radiance software for transient solar radiation calculations. Furthermore, by using the proposed ESC, case studies for typical Japanese offices are carried out to verify reduction effects on the annual thermal load and electrical energy consumption of an air source heat pump for each louver set-up. Simulation results are calculated in hourly increments using TRNSYS software; the results show that both thermal loads and electrical energy consumption are reduced regardless of louver types and facade orientations when integrated external louver facades are installed.

RELATION BETWEEN FEELINGS AND PHYSICAL PROPERTIES AND EFFECT OF WATER SAVING SHOWER HEAD IN ACTUAL BATHING: Study on physical properties and feeling of use of hot water saving shower head Part2@@@節湯型シャワーヘッドの物理特性と使用感に関する研究 第2報

The objective of this research is to grasp the relation of hot water saving shower head among optimum flow rate, feelings of use and physical properties through some experiments. As a result, the followings were obtained; 1) The feelings of volume and momentum were high relation with satisfaction. Also, low volume and high momentum can be dissatisfied factors. 2) It was indicated that hot water consumption was reduced with a flow quantity reduction effect in the actual bathing without spreading use time by the use of water saving shower head. 3) It was suggested that we need at least 7.0L/min flow rate if we use the shower head not to harm feeling of satisfaction.

A Study on the Convective Heat Transfer Coefficient and Thermal Resistance of Clothing under Cross Ventilation

Abstract The convective heat transfer coefficient around the human body is important for evaluating the effects that airflows exert on thermal comfort. However measuring it is generally difficult. Therefore, in this research, a thermal manikin was set up inside a wind tunnel simulating a ventilation environment. This was used to measure the convective heat transfer coefficient around the human body and the relationship between the effects of airflows and the thermal resistance of clothing under various clothing conditions. The results showed that the convective heat transfer coefficient near the thermal manikin was somewhat lower than the value obtained with the calculation formula used in the PMV calculation. It was also confirmed that the thermal resistance of clothing decreases due to the effects of airflows in the case of clothing with high permeability, as has been described in previous research.