Acoustically enhanced heat exchange and drying apparatus

Patent · Fri Jul 10 04:00:00 EDT 1987

OSTI ID:6742338

Bramlette, T T; Keller, J O

A heat transfer drying apparatus includes an acoustically augmented heat transfer chamber for receiving material to be dried. The chamber includes a first heat transfer gas inlet, a second heat transfer gas inlet, a material inlet, and a gas outlet which also serves as a dried material and gas outlet. A non-pulsing first heat transfer gas source provides a first drying gas to the acoustically augmented heat transfer chamber through the first heat transfer gas inlet. A valveless, continuous second heat transfer gas source provides a second drying gas to the acoustically augmented heat transfer chamber through the second heat transfer gas inlet. The second drying gas also generates acoustic waves which bring about acoustical coupling with the gases in the acoustically augmented heat transfer chamber. The second drying gas itself oscillates at an acoustic frequency of approximately 180 Hz due to fluid mechanical motion in the gas. The oscillations of the second heat transfer gas coupled to the first heat transfer gas in the acoustically augmented heat transfer chamber enhance heat and mass transfer by convection within the chamber. 3 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• Assignee: SNL; ERA-14-001313; EDB-88-185753
• Patent Number(s): PATENTS-US-A6071953
• OSTI ID: 6742338
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ACOUSTICS
DATA
DESIGN
DRYERS
ENERGY TRANSFER
EXPERIMENTAL DATA
HEAT EXCHANGERS
HEAT TRANSFER
INFORMATION
INVENTIONS
MOISTURE
NUMERICAL DATA
PARTICLES
PARTICULATES