Convective heat transfer within an industrial heat treating furnace

Patent · Tue Dec 06 04:00:00 EST 1988

OSTI ID:6354909

Hemsath, K H

This patent describes an industrial heat treat furnace comprising: (a) an insulated furnace casing defining an enclosure; (b) a sealed, imperforate, generally thin walled, shell member having a closed end within the enclosure. The shell member containing an atmospheric gas initially at a first temperature; (c) at least one workpiece within the shell member; (d) source means remotely situated from the shell member for generating a fluid medium at a second temperature different than the first temperature; (e) heat transfer means in communication with the source means and situated within the enclosure relatively close to the shell member to effect heat transfer between the fluid medium at the second temperature and the exterior of the shell member's thin wall so that the temperature of the shell member's thin wall approaches the second temperature; and (f) jet pump means within the shell member producing an annular jet of atmosphere gas traveling the length of the shell member. The annular jet having an initial diameter when formed at a position remote from the closed end smaller than the inside diameter of the shell member.

• Assignee: Gas Research Institute, Chicago, IL
• Patent Number(s): US 4789333
• OSTI ID: 6354909
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
CONVECTION
DESIGN
ENERGY TRANSFER
FLUID FLOW
FLUIDS
FURNACES
HEAT EXCHANGERS
HEAT TRANSFER
HEAT TRANSFER FLUIDS
MASS TRANSFER
PUMPS
SEALS
THERMAL INSULATION