High velocity and high dilution exhaust system

Details High velocity and high dilution exhaust system High velocity and high dilution exhaust system

2006-03-28

2006-03-28

Joyce, Harold (Department: 3749)

Ventilation

Chimney or stack

Chimneytop or stacktop structure

C110S162000, C415S212100, C454S040000

Reexamination Certificate

active

07018287

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), Freeborn
patent: 1770986 (1930-07-01), Liagre
patent: 2561135 (1951-07-01), Resek
patent: 3592122 (1971-07-01), Hughes
patent: 3841208 (1974-10-01), Knox
patent: 5439349 (1995-08-01), Kupferberg
patent: 2003/0114098 (2003-06-01), Hill et al.

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