Technical Section on Technologies for Comfortable Sound &
Vibration and New Evaluation Method of Sound & Vibration

Based on research results obtained until the FY 2008, the year up to which gTechnical Section on Comfortable Sound Environment of Machinesh was active for attaining human-centered comfortable environment. Our missions are follows;
1) Development of evaluation methods and research on measures to achieve comfortable sound and vibration environments for humans.
2) Technology succession through active exchange with young researchers/engineers.
3) Provision for a place of information exchange based on "Participatory Discussion Format" where the discussion involving professionals from different fields is promoted.

Technical Section on Numerical Environmental Engineering

The objective is to develop new numerical methods via research and information exchange for various problems related to computer simulation in the field of environmental engineering concentrating on thermal air flow phenomena. Moreover, the onsite requirements of businesses and offices are investigated and practical methods are established while elucidating the possibilities and limitations of numerical methods in actual application. Although specific research topics are diverse, a certain number of them are as follows.
1) Standardization of CFD technology for specific problems
2) Coupling of CFD (micro model) and macro model
3) Urban development using environmental adjustment function of nature
4) Control and ventilation of pollutants in street canyons
5) Support for optimum design in air conditioning fans
6) Investigation of turbulence model for natural convection field analysis in closed spaces
7) Development of numerical environmental test laboratory for energy save housing

Technical Section on Unified Mathematical Model for Total Energy Systems

Smartification and Zero Energy Building (ZEB) are familiar terms. The large-scale energy systems that those words describe demand optimum design and management. The operational behavior of these systems should further be grasped as an integrated composition of different physical phenomenon; however, finding an experimental approach to analyze this operational behavior is very difficult and an integrated numerical analysis can definitely be useful.
This numerical analysis does not need to be a detailed mathematical model that elucidates individual physical phenomenon based on hydrodynamics and thermodynamics, but a mathematical model matched to the scale of each system. In this case, if only simple mathematical models are used in system simulation, it leads to unreasonable results.
Therefore, considering the simulation accuracy required from integrated numerical analysis, this study group has tried to unify and generalize a mathematical model that covers each element as well as the entire system.

Technical Section on Advanced Environmental Control Technologies Using Sorption Phenomena

Absorption/adsorption chillers and desiccant air conditioning systems are major technologies that use absorption or adsorption phenomena for energy efficient and environmentally benign systems. To upgrade these technologies and to expand it in wider fields, it is important to build a framework of interdisciplinary research and development including fundamentals of absorption/adsorption phenomena, system design and control, etc. In this context, the research group aims to create the next generation  energy  and  environmental  control  technologies, which use absorption/adsorption as a key phenomenon. The activities include case studies, investigations on advanced technologies, discussion among engineers and researchers in material development and analysis, heat exchanger technologies, refrigeration and air conditioning systems, energy storage and transportation, system simulation and optimization.

Technical Section on Energy and Environment Working Fluids

The Technical Section on Energy and Environment Working Fluids focuses on analytical and experimental techniques to evaluate various fluids, such as refrigerants/working-fluids, CO2 absorbents, hydrogen, bio-fuels, and hydrates. Although these fluids are important in environmental engineering, it is difficult to include extensive research requirements for numerous substances and various applications. We aim to discuss and assemble these technologies to observe common technical concepts to enhance our research activities.