Search results

The line for f=0.022 is partially missing.

After shitting on them so much, I figured it's time to throw them some love.  The Moody chart in the manual has a secondary horizontal axis for the product of the flow velocity in fps and the pipe ID in inches.  This is nice because with this you don't have to look up viscosity and calculate the...

So, this should be a "4" instead of a "2"

Definition of hydraulic radius, RH, and hydraulic diameter, DH, are wrong. They are saying RH = (1/2)*A/P where A=flow area and P=wetted perimeter. They are also saying DH, = RH/2)   But in reality, RH = A/P and RH, = DH/4 as shown in these 2 different sources:  1. MERM13: 2. Fluid...

Murder podcasts? Surely a fan of https://timesuckpodcast.com,  I presume.

of money, that is. Also, two of our last three former governors have been to federal prison.

They fixed this too.

Looks like in the new version 1.1, they fixed the efficiency of the Otto cycle and the COP of the gas refrigeration cycle.

LOL WHAT?!?!?!?!?!  OMG the mass flow rates in the two stages can never be the same. Energy conservation in the intercooler requires:  m6h6 + m4h4 = m1h1 + m7h7. (assuming a well-insulated chamber) Now let m_highP = m1 = m4 and m_lowP = m6 = m7. Put these in the energy balance to obtain...

FYI

Yes. I have reported most of the things in this thread to them. Not this latest set of findings, but I will get around to it probably this weekend.

LOL JFC

Thanks. I hadn't noticed the "mu" -- good catch. Yeah, what a sh*t show. That first chart is useless. In their defense, they do provide a reference to where the chart came from. Maybe it's messed up in the original source and they just copied it.  It shows, however, that nobody who is...

 That's the kicker with this manual. They use lb, lbf and lbm. Sometimes by "lb" they mean "lbm" and sometimes they mean "lbf". I mean, this thing is just a real hoot.

Ok, I welcome any clarification and pointing out what I'm doing wrong here. If I'm not making any dumb mistakes, then this is further proof that this handbook is an unmitigated disaster. Consider this simple question: What is the dynamic viscosity of SAE 50 oil at 50C? If we use the graph in...

The unit conversion table in page 2 erroneously has the viscosity unit "reyn" as equal to 1 lb-ft/s^2 where it should be 1 lbf-s/in^2. 

Top spam!

Insomnia spam