Accession Number:

ADD008971

Title:

Fluidized Bed Heat Exchanger/Freezer.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1981-10-08

Pagination or Media Count:

15.0

Abstract:

This invention relates to heat exchangers and particularly to the use of a fluidized bed heat exchanger. Indirect contact heat exchangers of various types are used to transfer heat from one fluid to another where direct contact and mixing or contamination of the heating or cooling fluid and the heated or cooled fluid cannot be permitted. Indirect contact heat exchangers generally use metallic walls to separate the two fluids. In order to promote rapid transfer of heat the two fluids are pumped through the heat exchanger to attain forced convection with turbulent flow. Turbulent flow causes relatively rapid mixing of the cooled or heated layer of liquid at the interface between the metallic wall and the fluid. The fluid often contains material which adheres to the metallic wall and impedes heat flow andor forms a surface coating beneath which corrosive attack can occur. Enhancement of turbulence to promote rapid mixing is effected in some heat exchangers by pumping the fluid through tortuous passages of small diameter so that the distance between the boundary layer and the center of the fluid stream is small.

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating

Distribution Statement:

APPROVED FOR PUBLIC RELEASE