NEW APPROACH TO GAS VENTING OF TANKERS

An analysis is made of the benefits which can be obtained by ejecting the gases, displaced when petroleum is loaded into cargo tanks, at a high velocity so that they reach a height well above the ships' working areas. It has now been established that a minimum efflux velocity of 100 fps will provide adequate dispersal and it is proposed that this velocity is achieved by installing a variable nozzle in each outlet in which tank pressure is used to provide a vent area proportional to the loading rate. The theory of mixing which takes place in turbulent jets in still air is considered and a study of previous experimental results relating efflux velocity to projection length and entrainment ratio is reviewed.

• Corporate Authors:

  Royal Institution of Naval Architects

  10 Upper Belgrave Street
  ,   United States 
• Authors:
  • Martin, W S
• Publication Date: 1970-7

Media Info

• Pagination: p. 307-318
• Serial:
  • Publication of: Royal Institution of Naval Architects
  • Volume: 112
  • Issue Number: 3
  • Publisher: Royal Institution of Naval Architects

Subject/Index Terms

• TRT Terms: Air entrainment; Marine safety; Tankers; Tanks (Containers); Ventilation systems
• Old TRIS Terms: Gas freeing; Jet entrainment; Tank venting; Tanker safety
• Subject Areas: Marine Transportation; Safety and Human Factors;

Filing Info

• Accession Number: 00019130
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 29 1971 12:00AM