Harunori YOSHIDA  
  Education: B.Eng.(1969), M.Eng.(1971), Dr.Eng. in Architecture (1990).  
  Field of Interest: Architectural Environment Engineering and Building Energy Management  

  1) Energy Conservation in Buildings and Urban Areas
 Optimal design of energy conservation in buildings and urban areas is the central issue. In particular finding new energy conservation strategies in operational stages is placed as the most urgent research under the activity of International Energy Association (IEA). Energy conservation in buildings was implemented vigorously after the energy crisis but the focal point was mostly in design aspect. However in the actual fields it is gradually getting importance that the design performance is not satisfied and many unpredictable problems arise, and it is expected that if these issues are solved 20 to 30 % energy conservation can be achieved. To achieve this research works in automatic fault detection in operation and commissioning stages and optimal operation of building systems are undertaken.
  2) Investigation and Mitigation of Urban Heat Island
 The energy consumed in a city is dissipated into the urban areas as heat and forms a heat island. This phenomenon increases cooling load of buildings in the city areas and multiplies the effect resulting in a vicious circle. Research in planning and designing of cities and urban areas is performed investigating the phenomenon by measuring and predicting it by simulation.
  3) Investigation of Trees Around Residential Buildings
 High density land use in many cities has caused an uncomfortable urban environment, which directly influences the thermal environment in outdoor space around residential buildings. In order to improve the urban thermal environment, utilization of cooling effect of green areas has been increasing is observed. The purposes of this study are 1) to investigate the effect of transpiration and evaporation of trees on the thermal environment in the areas around residential buildings surrounded by trees, 2) to compare the simulated and measured results about transpiration rate of trees with modeling stomatal conductance on leaves.
  4) Design of Green Buildings and Cities
 For the construction of sustainable society developing green buildings and cities is one of the key issues. At present research works are undertaken regarding reevaluation of traditional building performance and natural materials in terms of engineering conservation point of view, and coexisting design of building and cities with nature by profound understanding of local weather.
  5) Modeling of Weather Data
 For energy conservation weather data under which a building and a urban area is located is vital source. Weather changes stochastically and the global weather change seems to occur. Understanding weather phenomena properly and planning energy conservation and natural energy use the fundamental engineering research regarding how to provide weather data information is undertaken. A new approach to model the weather data based on time series analysis was proposed, and the generic method of regional weather data modeling was demonstrated. Recently a new research work providing detailed weather data by measuring the distribution of sky radiation has been started in 2000.

Proffesor YOSHIDA's Academic Achievements