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Wind Direction that influence the Plot plan

Posted by Antony Thomas at Friday, March 11, 2016

Wind Direction that influence the Plot plan

 Wind Direction

·         Prevailing wind conditions influence the design considerations for the location of the flare or vent stack.  It is important that reliable wind data is obtained for the proposed location of the facility.  In this respect, safe design requirements will typically require the following:

v  Metrological wind data is normally presented in the form of a “Wind Rose”.  The “Rose” defines the direction of winds and expected frequency of wind velocity from each wind direction in a typical year or identified seasonal periods.  Accompanying wind frequency tables provide data on expected wind speed occurrences from calm to extreme conditions.
v  Plant is safely ventilated.
v  Safe areas and locations are provided that are up-wind of any potential hazardous releases.
v  Any plumes of airborne gas and/or particulates are dissipated away from critical areas of the plant and other occupied/public areas as effectively as possible by the prevailing wind.
v  Radiant heat emission levels from flares and/or accidental ignition of vents, do not exceed the limits.
v  Prevailing wind conditions also influence the placement of uncovered stockpiles of bulk solids which can be a source of dust.
v  Below are the few examples to locate the facility/equipment with respect to wind direction.
ü Flare: Preferably cross wind direction; corner of plot. Area around flare should be paved to avoid growth of grass.
ü Gas Compressor: Downwind from heater so that leaked gases will not drift heater.
ü Heater: Upwind at the corner of the unit, space should be provided for removal and clearing of heater tubes besides approach for crane.
ü Waste disposal facility (Effluent treatment Plant) : Preferably located by the side of boundary wall but downstream of wind direction so that foul odor that may be present at times does not affect the plant personnel and neighborhood area.
ü Cooling Tower: Downstream direction of wind to avoid corrosion of the equipment’s in process area.

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