An aircooled smokestack. The smokestack has passages within it for air or other cooling fluid. The fluid circulates through the smokestack, cooling off the internal and external surfaces. The cooling fluid is then aspirated into the stack gases near the top of the stack, thereby film cooling the upper portion of the interior of the stack. Cooling air is also aspirated into the flowing gases at the top of the stack, thereby cooling the gases as they leave the stack. Briefly, the present invention is a smokestack for a ship or fixed installations which is air cooled to reduce the infrared radiation emitted by the stack. Air or other cooling fluid is taken into a plenum chamber at the base of the stack and circulated through the stack. The cooling passages within the stack are directly beneath the interior and exterior surfaces of the stack. After being circulated through the cooling passages, the air is aspirated into the gas path within the stack; it then film cools the upper portion of the interior of the stack.

  • Supplemental Notes:
    • Filed 30 Oct 74 patented 19 Mar 91; Supersedes PAT-APPL-5-519 157.; This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, DC 20231 $1.50.; Patent
  • Corporate Authors:

    Department of the Navy

    Washington, DC  United States 
  • Authors:
    • Keimel, R W
    • Keimel, A C
    • Thomas, J F
  • Publication Date: 0


  • English

Media Info

  • Pagination: 5 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00666705
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-5-519 157; PATENT-5 000 161
  • Files: TRIS
  • Created Date: Oct 3 1994 12:00AM