At 01:13 PM 9/16/2011, Alan J Fletcher wrote:
I'm still looking for the 'orifice' needed to create 3 Bar internal pressure.
Napier's formula (accurate to about 3%) for steam going through an orifice in a flat plate, to atmospheric pressure.
W = p * a / 70 Where W is flow lbs/sec p is pressure lbs/in^2 a is area inches^2 or in reverse a = W * 70 / p p = W * 70 / a To get a 3 Bar drop at 11 kg/hr I calculate the radius as 0.15 cm. If we say half of that is water, (steam flow 5.5 kg/hr) we get 0.1 cm What's the estimated radius of the short length of outlet hose ... 0.5 cm ? The pressure drop at 5.5kg/hr through 0.5 cm radius is only 0.13 bar
