A 400,000-dwt, 45,000-hp tanker now being built by Mitsubishi at Nagasaki has two large longitudinal bulkheads in the engine room. These form several enclosed compartments which could have caused ventilation problems. In anticipation of such problems, the Authors, of the Nagasaki yard, ascertained which compartments were particularly affected, and investigated the air flow throughout the engine-room spaces, with a 1:25 scale model of the engine room. The model, of transparent acrylic resin, allowed the direct observation of smoke blown into each compartment and measurement of the time that the smoke remained there, as well as giving general information on the air flow in the engine room as a whole. As a result of this model investigation, the initial ventilation plan was studied again and revised. The engine room in the completed ship will have 22 air changes an hour (the Marine Engineering Society in Japan standard is 20 to 25), with a mean temperature rise of 7.7 degrees C. The article, which includes tabulated particulars of this ventilation system, gives a detailed account of the model investigation and a list of the modifications that resulted from it. The effects of these latter will be examined during sea trials.

  • Corporate Authors:

    Marine Engineering Society in Japan

    Osaka Building, 1-2-2 Uchisaiwai-Cho, Chiyoda-Ku
    Tokyo 100,   Japan 
  • Authors:
    • Katakura, K
    • Araki, K
  • Publication Date: 1977-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00159914
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Sep 20 1977 12:00AM