Thought Question

Unknown

All this talk of <i>hydrostatic pressure</i> got me thinking.<BR><BR>In a steam boiler, where is the pressure highest?<BR>At the lower drain,, or up-above in the steam?<BR>Thoughts.<BR><BR>Dave

jp_2

drain!

total pressure = hydro + any pressure above.

pressure is based on gravity/weight from above.

Unknown

Yes but,

what if this steam boiler is 12Ft round X 100 Ft. high(at waterline) & operating @ 60 PSI.
VS
Another @ 6Ft high, 4Ft round operating at 100.7 PSI?
Wouldn`t the higher boiler have more pressure at its drain? ;-)

Dave

scrook_2

at the bottom...

The pressure at the water/steam interface will be the steam pressure, as you go deeper into the water (ultimately to the lowest point -- say the drain valve -- the pressure will rise at 0.433 psi/ft of water depth.

scrook_2

diameter doesn't matter but...

height of water & steam pressure do...

100 ft water's 43.3 psi + 60 psi steam = 103.3 psi at the very bottom.

vs.

6 ft water's 2.6 psi + 100.7 psi steam = 103.3 psi at the very bottom.

STEVE PAUL_3

HEAD-HEIGHT-PRESSURE AND BEYOND

Dave is correct. The pressure at the bottom of the 100' tank would "TOTAL" 103PSI. The pressure at the bottom of the 65" tank would "TOTAL" 128PSI ooops! i THOUGHT THAT SAID 65' never mind

Unknown

2.6 psi?

C`mon,, I can almost hear the calculators tapping! ;-)

Dave

jp_2

how you figure

????????

Unknown

Did I miss

something jp?

Dave

jp_2

read too fast

i thought you were suggesting the pressure only 2.6 psi?

read your post too fast.