High velocity and high dilution exhaust system

Ventilation – Chimney or stack

Reexamination Certificate

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Details

C454S040000

Reexamination Certificate

active

07077739

ABSTRACT:
The high velocity and high dilution exhaust system uses a centrifugal fan provided with a tapered nozzle. The nozzle compresses the airstream exiting the fan to increase back pressure and velocity. The air flow from the fan enters a stack having a venturi further increasing the velocity and decreasing the pressure. The decrease in pressure causes a suction, allowing the introduction of ambient air to mix with and dilute the output of the fan. The total discharge from the exhaust stack has a high velocity resulting in a plume height and effective height of the exhaust before dispersion occurs.

REFERENCES:
patent: 94115 (1869-08-01), Hynes
patent: 126797 (1872-05-01), Freebom
patent: 1533898 (1925-04-01), Prat
patent: 1770986 (1930-07-01), Liagre
patent: 2561135 (1951-07-01), Resek
patent: 5439349 (1995-08-01), Kupferberg
patent: 6431974 (2002-08-01), Tetley et al.
patent: 2003/0114098 (2003-06-01), Hill et al.

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