Air conditioning may have economic and health disadvantages, but it does provide protection against future change in functional requirements of buildings, says Professor Patrick O'Sullivan. It will continue to be essential in high density urban areas, but there will be many cases where there is no clear distinction as to the which mode of environmental control, natural or mechanical, should be adopted
The influence of wind is an important part of the bioclimatic town planning criteria. Ventilating and mechanical action of the wind towards reduction of air pollution in urban areas is becoming increasingly important and must be analyzed along with other factors such as · thermal losses, comfort etc.
The OM solar system is one of various passive systems. As is in the general passive system, the technique in the OM solar system works with the designing and architectural space as a unity. In other words, the technique is a part of the designing. Nowadays a lot of new technique have been developed and all kinds of related technology are born. During the past nine years, the system has been already employed in about eight thousand homes and sixty public buildings all over Japan.
This paper deals with the relationship between the characteristics of ventilation and the architectural features on three types of Japanese houses representative of the recent historical evolution in the building of dwellings: a traditional well ventilated house in a rural area, a typical postwar house with a central corridor and a multi-family house of high air-tightness in an urban area. The investigations were carried out based on 3-D numerical air flow simulations with realistic wind conditions.
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