Masayuki Mae

Data on experiments result of three identical huts with shape-stabilized phase change materials in Japanese temperate climate

The data in this article are the experimental results of three identical huts (Hut A, B and C), which were examined by using varying shape-stabilized PCMs (SSPCMs) sheet levels under natural and heating conditions in winter of Chiba prefecture where Japanese temperate climate. The SSPCMs sheet established the melting and solidification-temperature ranged at 19–26 °C were used. In Hut A, no SSPCM sheets were applied; in Hut B, four layers of SSPCM sheets were applied to the floor; in Hut C, one layer of SSPCM was applied to the floor, walls, and ceilings. The data provide information on the application of SSPCM sheets to improve indoor stabilization and the heating load reduction effects.

Experiments of three identical huts with shape-stabilized phase change materials and simulation of detached house in Japanese climate classification

The data in this article are the experiment and simulation results of three identical huts were examined using by using varying shape-stabilized PCMs (SSPCMs) sheet levels in winter of Chiba prefecture where Japanese temperate climate. A shape-stabilized phase-change material (SSPCM) established the melting- and solidification-temperature ranges at 19–26 °C was installed on the floor, walls, and ceiling of various buildings, and its effects on indoor room temperature stabilization and heating load reduction were examined using experiments and simulations. The PCM model was developed based on the specific heat capacity measured using a thermostatic chamber and simulations results were obtained using EnergyPlus. The validity of the PCM model was examined by comparing the simulation and experimental results. The model was then examined to determine the applicability of PCM to the various climates in Japan through annual heating load simulations. The target buildings were classified as Type A (no PCM, reference), Type B (only the floor contained PCM), and Type C (the floor, walls, and ceiling contained PCM) using a standard Japanese house. Types B and C had the same amount of PCM. The simulation was run for 21 cases, with one being run for each type of building in seven Japanese climates.

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.

STUDY ON DIRECT SOLAR GAIN SYSTEM IN HOUSES CONSIDERING SPECTRAL PROPERTIES OF SOLAR RADIATION

Direct solar gain system to get solar heat directly from the windows is often adopted in houses. On the other hand, if the amount of solar heat gain and thermal mass is not proportionate, this system will not work well. We proposed the blind which reflects near-infrared range upward and transmits visible light. It can distribute acquired solar heat to indoor thermal mass adequately. We evaluated the direct gain system using this blind by experiment and simulation. It is confirmed that the system could improve indoor thermal environment and contribute to energy saving.

THE RESULT OF EXPERIMENTAL RESIDENCE IN LCCM DEMONSTRATION HOUSE

Recently, not only running CO2 consumption but also initial CO2 reduction has been important. In Japan, LCCM (Life cycle carbon minus) is a keyword of sustainable buildings. In LCCM buildings, many efforts to reduce CO2 (such as high thermal insulation, high efficient equipment, and so on) are adopted and Photovoltaic system can return more amount of CO2 than CO2 which is consumed in buildings. According to such principal, LCCM demonstration house were built in 2011. We have checking the performance of this house by experimental residence.

Water Management in Sustainable Buildings

In Japan, since World War II, better water systems have been developed and the amount of water used has increased rapidly. Nationally, rainfall is relatively plentiful and the cost of water service is not expensive in many regions. So people are not very sensitive about water conservation in regards to buildings. In that context, the main interest of designing the water system in a building has been to assure comfort by determining the proper number of fixtures and the system capacity.

COOLING ELECTRICITY CONSUMPTION OF RESIDENTIAL AIR-CONDITIONER

The energy consumption of residential sector in Japan has been continuing to increase. It is necessary to grasp the usage and the catalog of home electric appliances. The energy-efficiency performance of air-conditioner has been improved recently. It is said, however, the relationship between the performance of the catalog and of actual usage of air-conditioner is different. In this paper, we grasp the electricity if air-conditioner in 14 houses in Kanto district, and study the relationship between actual and expected usage of air-conditioner.