Zoning is commonly accepted for air-conditioning in a large space. Indoor space is zoned so that each heat load and the corresponding AC system should hardly affect the room air temperature of the other zones. The AC system is controlled independently at each zone. It is desirable that the local heat load should be confined in the local space. Even if it is difficult, its effect on the entire space should be known for optimal operation of the AC system in a large space. Following the concept of zoning, the entire space of the grand opera theater (Fig.1) which was built in Tokyo 1997 is divided into two main zones, stage and audience zones. It is expected that the heat load from the stage could be handled by the stage AC system which controls and is controlled only by the stage zone temperature, and that the audience zone could be independently handled by the audience AC system (Fig.2 (1)). However, it is difficult to assume this kind of independent AC control for each zone, since there should be the cross-circulation of air between the stage and the audience zone (Fig.2 (2)) and both zone temperatures are affected greatly with one another. In this research, the cross-circulation is analyzed with CFD (Computational Fluid Dynamics) and cross-circulation effects on the temperature distributions are predicted in detail. The analysis is useful to optimally control each-zoned AC system. For precise control of air temperature of a zone in concern, it is desirable to know how the room air temperature in that zone is composed not only with the heat load and AC heat input into that zone but also with those of the other zones. However, the mere results of CFD, i.e. air velocity and temperature distributions in the space, do not reveal the effect of each heat load and AC heat input on the air temperature of the zone in concern. In this research, therefore, a newly developed method of indoor climate design of large enclosure is introduced. It is defined as CRI (Contribution Ratio for Indoor climate) evaluation (Kato et al 1994). This method is based on CFD, and is taking account of the influence of all AC heat inputs and heat loads on the temperature distribution at a zone in concern. The air temperature of each zone can be controlled precisely through the analysis of the CRI evaluation?

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{{Explor lien
   |wiki=    Wicri/Musique
   |area=    OperaV1
   |flux=    PascalFrancis
   |étape=   Corpus
   |type=    RBID
   |clé=     Pascal:99-0209934
   |texte=   Zonal climate design of grand opera theater based on contribution ratio of cooled air from supply openings
}}