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STUDY ON FLOW AND DIFFUSION FIELD OF CLEAN ROOMS WITH A LOCALLY AIR-BALANCED SUPPLY-EXHAUST VENTILATION SYSTEM INSTALLED AT THE CEILING. 1. NUMERICAL ANALYSIS OF FLOW AND DIFFUSION CHARACTERISTICS.

[In Japanese. / En japonais.]

Author(s) : MURAKAMI S.

Type of article: Article

Summary

THE INFLUENCES OF THE FLOW OBSTACLE UPON THE FLOW AND DIFFUSIO N FIELD ARE EXAMINED QUANTITATIVELY WITH ACCURACY. RESULTS ARE AS FOLLOWS: 1) THE VENTILATION EFFICIENCY IN THE CLEAN ROOM IS WELL EXPRESSED BY THE SCALE FOR VENTILATION EFFICIENCY PROPOSED BY THE AUTHORS ; 2) AN ARRANGEMENT OF A FLOW OBSTACLE BELOW A SUPPLY JET HAS A RATHER GREAT INFLUENCE UPON THE FLOW AND DIFFUSION FIELD OF THIS TYPE OF CLEAN ROOM ; AND 3) THE SLIGHT IMBALANCE (LESS THAN 10%) OF THE AIR VOLUME RATE IN THE LOCAL SUPPLY-EXHAUST SYSTEM HAS LITTLE INFLUENCE ON THE VENTILATION EFFICIENCY. THE LARGE IMBALANCE (50%) OF THE AIR-VOLUME RATE REDUCES THE VENTILATION EFFICIENCY OF THE CONTAMINANT.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1991-0807
  • Languages: Japanese
  • Source: Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 43
  • Publication date: 1990/06
  • Document available for consultation in the library of the IIR headquarters only.

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