You might want to check out the NAIMA 3E Plus software. Its free and does heat loss calcs for insulated and bare pipes, etc. Did I mention its free?
http://www.pipeinsulation.org/pages/download.html
25362, et al
I'm struggling with much of this, but you say that for constant kinetic energy, delta H = 0. But there is a large velocity change, as denniskb mentions, the velocity is likely sonic at the restriction and perhaps again at the discharge on the expansion to atmosphere (for cases...
denniskb,
Cool, I am impressed with your work. FYI, I used a standard presta bicycle valve on the bottle which probably has an ID around 4 mm, but it has a valve stem which reduces the area of the exit.
I didn't time the blowdown, but it seemed to be about 2 or 3 sec, as well as I can...
denniskb:
You ask if I sensed the cold of the bottle or the gas.
The bottle was ambient (summer) temperature at pressure. I let it cool for a while for the heat of compression to dissipate before releasing the pressure. As the gas was released, the exiting gas was noticeably cool. The...
There may be a better way, but
exists = False
For Each wkSheet in Thisworkbook.Worksheets
if wkSheet.Name = "Sheet4" Then
exists = True
End If
Next
If exists = False then
Thisworkbook.Sheets.Add Before:= _
Worksheets(Worksheets.Count)...
I am having a problem removing modules via VBA code.
code snippet...
WkBook = "Book1.xls"
ModName = "Module1"
Workbooks(WkBook).VBProject.VBComponents.Remove _ Workbooks(WkBook).VBProject.VBComponents.(ModName)
This works sometimes (especially in single step mode), but other times it doesn't...
Thanks to all. While some of these posts help, I'm still a little confused. To answer Quarks question about the pressure capability of a Coke bottle, I pumped a standard 2 liter PET Coke bottle to nearly 150 psi, before I chickened out and quit pumping.
I see now that I really have 2...
In calculating downstream temperatures in a 50 psig compressed air system, I cane across an apparent puzzle. I know the Joule Thomson coefficient for air at my conditions is roughly 0.25 °C/atm so an expansion from 3 atm -> 1 atm should cool a little less than 1°C (correct?). I did an...
Can anyone give me the 'Babcock Formula' for steam pressure loss? I checked my copy of Babcock & Wilcox and Crane plus intternet searches, but no luck.
