研究発表

The energy consumption in building sector is extending rapidly in recent years. It makes the promotion of energy conservation technologies urgent issue to be discussed. In this study, the authors have developed the evaluation method for Energy Benefit and Non Energy Benefits of energy conservation technologies. As a conclusion, by making the benefits clear, we show people useful information about applying the energy conservation technologies.

Sustainable buildings with low environmental impact have attracted great social concern. The purpose of this study is to evaluate the environmental impact of a sustainable building which utilizes local timbers and energy-saving systems quantitatively with life cycle assessment (LCA) method. In this study, the database for LCA is developed based on field survey. This paper describes the out line of the environmental impact assessment of government offce with low environmental impact based on the performance values. The effect of environmental burden reduction is evaluated quantitatively with Life-Cycle Impact assessment Method of Endpoint modeling (LIME).

The purpose of this study is to simulate the emission of life cycle greenhouse gas (GHG) from foamed insulations of houses including the increase of thermal conductivity called as "Ageing". The simulation results are as follows; 1) If foamed insulations put in fluorocarbon are not used, GHG emission of detached houses is reduced by 50% in Sapporo, 70% in Tokyo. 2) In addition, GHG emission of apartments is reduced by 30% in Sapporo and 60% in Tokyo.

Sustainable buildings with low environmental impact have attracted great social concern. The purpose of this study is to evaluate the environmental impact of a sustainable building which utilizes local timbers quantitatively with life cycle assessment (LCA) method. In this study, the database for LCA of local building material is developed based on field survey and Input-Output tables. This paper describes the out line of the combined method for development of database for LCA by summation method and input-output analysis method.

The purpose of this study is to show the effect of the increase of the external cost from environmental impacts. The results of simulation are as follows. 1) Influence of external cost on Life Cycle Cost (LCC) is not so large. 2) However, in case of adopting HCFC for foamed insulation, the percentage of external cost in LCC is about 10%. 3) External cost when adopting CFC for the foaming insulation is four times larger than the one when adopting HCFC.

This paper (Part21) reports the effects of refresh on academic performance and fatigue for students. In this paper, the academic performance and fatigue are evaluated by using the quiz and the questionnaire as self-assessment form. As an investigation result, improvement was observed in the academic performance by effect of refreshment. T-score of the quiz was improved by 4.3 on average (p<0.03) in case of stretching.

In recent years, increased energy consumption in Middle East's urban areas is an urgent issue. For energy consumption reduction, effects of cooling by urban planning using evaporation at areas on artificial island and desert planted trees attract attentions. In this study, these planned urban areas are measured on the spot and analyzed green and water coverage rations by using satellite photograph. Based on these analyses, reduction of cooling degree day is calculated and effectiveness of artificial island and desert planted trees are confirmed.

The number of domestic existing houses has been increasing; over 46 million in 2003. However, all those insulation levels are not high enough. Therefore in the household section, the renovation of thermal insulation is expected for the effective reduction of greenhouse gas. This research describes comparison of effect of injecting rigid poly-urethane foam into walls and doubling glazing/sash as simple renovation methods for houses, according to the estimation of CO_2 emission by heating/cooling and LC GHG (Life Cycle Greenhouse Gas).

In this study, a new scale for assessing the variations of indoor environment such as thermal comfort and energy conservation due to changes of outdoor environment beyond assumed situation is defined as robustness of indoor environment. And, it aims to evaluate the of robustness of environmentally symbiotic housing by measurement. As a result, relation between a passive technique and robustness was shown.

In recent years, increased energy consumption in Middle East caused owing to increase of the air conditioner demand by advancement of urbanization. For energy consumption reduction, effects of cooling by evaporation at urban areas on artificial island and desert planted trees attract attentions. In this study, these urban areas are measured on the spot and analyzed by CFD. Based on it, effectiveness of artificial island and desert planted trees are confirmed.

Nowadays, the number of people need to be cared in special nursing home are increasing by falling birthrate and aging population. But there are few researches about thermal environment and productivity in a facility. So the purpose of this study is to measure thermal environment and effect on productivity. Therefore, we measured and conducted questionnaire survey at the special nursing home for the aged that is introduced of radiant cooling and heating system.

Vernacular dwellings incorporate various effective techniques to improve the quality of the indoor environment by making full use of natural power. It is therefore expected to utilize their design concepts in making modern environmentally symbiotic housings. Water Housings in hot and humid areas, particularly in South East Asia are utilizing evaporative cooling effectively. In this paper, the Water Housing is measured on the spot and analyzed by CFD. Based on these data, effectiveness of the Water Housings are confirmed.

Vernacular dwellings incorporate various effective techniques to improve the quality of the indoor environment by making full use of natural power. It is therefore expected to utilize their design concepts in making modem environmentally symbiotic housings. Kasbah is one of Vernacular dwellings in hot-dry area, and utilizing thermal insulation and heat storage performance of adobe effectively. In this paper, the Kasbah in Morocco is measured on the spot. Based on these data, effectiveness of thermal insulation and heat storage performance of adobe is confirmed.

Demands among office buildings for workplace productivity and energy-saving benefit are increasing. This research aims to examine the influence upon thermal sensation and workplace productivity by fluctuation of the indoor temperature and the airflow. Subject experiments in a climate chamber were conducted. The decrease of the indoor temperature at the middle of a task was effective for maintenance or improvement of work performance. The fluctuation of temperature consumed less energy than a constant control of 25℃. In the indoor temperature of 28℃, the improvements of subjects' thermal sensation, thermal satisfaction and work performance by the airflow were found.

Now as the environment problem aggravate, improving productivity cannot be the only problem we think about, energy conservation also should be considerate. Our research inspects the optimum HVAC control to improve productivity and energy conservation in office space, and aims to obtain an optimum way to operate HVAC which lead advantageous positions both on energy consumption and productivity, adapting outside environment well. We measure the energy consumption and productivity to achieve the optimum control of HVAC in office space. As the conclusion, the best room temperature would be 25.1℃.