Masamichi Enai

Sustainable Design for the Residences in Gaza City

Abstract It has been understood that the environmental impact of housing design, construction and operation has lower priority in research studies as compared to the conventional interests in cost, size, form, location and aesthetics. Gaza′s climatic data indicates that both cold and warm percentages are in the extreme values such as finding a flexible design tool that can satisfy human comfort is an important requirement in a predominantly sustainable architecture concept. Using this new concept to improve the thermal environment and ventilation of buildings through identifying, developing, and testing innovative concepts that can have potential for achieving human satisfaction in homes. Herein, basic principles of Successive Integration Method have been utilized on some materials and varying passive elements to achieve an adequate module′s elements. An integrated design with floor cooling and heating, natural ventilation and some additional passive techniques found that indoor temperature could be properly maintained.

Improving the efficiency of cooling systems in data centers considering equipment characteristics

Internet data centers are helping to expand the network society throughout the world. These data centers require air conditioning to operate, and raising the efficiency of their cooling systems can have significant benefits such as the prevention of equipment failure and the saving of energy as well as improved cost performance. A data center in which much heat-generating equipment has been installed produces a large amount of heat, and achieving a balance between cooling power and fan driving power holds the key to greater efficiency. This study consisted of: 1) full-scale mockup experiments that consider the ventilation of even heat-generating equipment installed in racks; and 2) efficiency evaluation and intake-temperature evaluation based on measurement results for fixed heat-generating equipment using ventilation volume and interequipment gap area as parameters. The results of these evaluations revealed that intake temperature could be predicted when varying these two parameters.

Estimation of the solar radiation load at every floor in skylighted void space

Recently, buildings that adopted the external insulation method that is possible to take the thick insulation are widely prevalent in cold regions. While the reduction of heating load in winter is generally expected, the increase of cooling load in summer is concerned. So, it is necessary to devise the buildings and facilities like natural ventilation and solar control. The aim of this paper is to estimate the solar radiation load at every floor caused by incident light in skylighted void space. Therefore, we calculate the solar irradiance using ideas of luminous efficacy about the illuminance from the illumination distribution to every floor, and show details of solar radiation load at every floor by model experiment and numerical analysis.

INFLUENCE OF EAVE LENGTH AND DIFFUSION ON WINDOW IN THE SCHOOL CLASSROOM ONTO AN ANNUAL HEAT LOAD AND A DAYLIGHT ILLUMINATION

It is important to know how to balance the energy saving and the illumination environment in classroom for improving the condition of learning. This paper shows the influence of the eaves length and the diffusion of the window to heat load and the indoor illumination distribution in a school classroom.As results of numerical calculation, we show a possibility that illumination environment could be improved although the heat load slightly increased by establishing the eaves and addition of the diffusion instrument.