Thank you JBA for the answer. I have an additional question about your last comment:
"a coefficient curve based upon flow vs lift or opening position is required." If i understand well the C coefficient will change with the ratio of the valve. Do you have an idea why in the theory for the...
Hello,
I read something about the pressure drop across a valve and it was specified this is a singular pressure drop equivalent to K*U²/g (Borda formula). My question is, can we used the Bernouilli formula for a permanant incompressible flow to determine the flow rate function of the pressure...
Hello,
I'm looking for some books which can help me to learn about hydraulic, pneumatic and fluid mechanics. Can someone advise me a good one ?
Thank you !
Hello,
I have some questions regarding the nernst equation at open circuit voltage.
We know E(OCV) = E0+ ln (PH2*PO2^0.5 / PH2O)
I have some trouble with this:
If I have dry gas (both for O2 and H2), and my circuit is open at 25°C and 1 atm I have no water in the circuit so what become the...
There is something i don't really understand. I looked for the hydrogen's entropy at standard conditions, i found 130.7 J K-1mol-1
In this following link ...
So for the half reaction at anode side I have to take account only the entropy of H2 ? At 293.13 K, for the Anode : 2*ΔS H+ + 2*ΔS e- - ΔS H2 we have ΔS=130.68 J/K/mol ? I just read in a thesis the author make the assumption ΔS at anode side is null and ΔG too (for the same reason you have...
Hi everybody,
I have some troubles to define the enthalpy and entropy of a half reaction. If we consider the 2 following reactions :
Anode : H2 = 2H+ + 2e-
Cathode : 2H+ + 2e- + 1/2O2 = H2O
So the global reaction is :
H2 + 1/2O2 = H2O
We know the global reaction's entropy can...