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Loss in a Tank in lbm/hr

Equation What is it units

Wp=(.097+.038)v*(Pw-Pa)*A Loss in a tank lbm/hr

Pw=.0082e^17.27*T/(T+237.3) Saturation vapor pressure of water at actual temp psia

Pa=.0082e^17.27*Tdp/(Tdp+237.3) Saturation vapor pressure of water at dew point psia

Tdp=(b*f(T,H))/(a-f(T,H)) Temp at dew point degrees C

f(T,H)=((a*T)/(b+T))+Ln(H)

H=chart relative humidity

v=chart wind velocity mph

A=chart area of tank ft^2

a=constant 17.27

b=constant 237.7





Average Temperature 22.22 degrees C

Average Dew Point 21.2 degrees C

Average Realative Humidity 84.25 %

Area of Tank(50 ft radius) 7850 ft^2

Wind Velocity 14.316 mph



Loss Equals 2.302956



http://www.bbc.co.uk/weather/world/city_guides/results.shtml?tt=TT001840

http://swera.unep.net/typo3conf/ext/metadata_tool/archive/download/camwindreport_R4_242.pdf

http://www.atlapedia.com/online/countries/elsalvad.htm

http://www.engineeringtoolbox.com/hazen-williams-water-d_797.html

Head loss in Pipes



500 Feet of Pipe

PVC piping (design coefficent of 150)

Flow Rate of 20 gal/min

Inside hydralic diameter=10 inch (2*r*2)

Pipe radius of 2.5 inches



Loss equal .002

http://www.engineeringtoolbox.com/evaporation-water-surface-d_690.html



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