Mathematics, Calculations and Supporting Data

by **EnviroEngr** » Tue 01 Mar 2005, 19:30:21

Engineering Equations:

Thermodynamics, enthalpy

h = enthalpy, Btu/lb
P = absolute pressure, psia
U = internal energy, Btu/lb
v = specific volume, ft3/lb

h = U + 0.185 P v

Thermodynamics, isobaric process: entropy change

Cp = specific heat, constant pressure, Btu/lb/Â°F
T = absolute temperature, Â°R
s = entropy, Btu/lb/Â°R

s2 - s1 = Cp*ln(T2/T1)

Thermodynamics, polytropic process, entropy change

Cv = specific heat at constant volume, Btu/lb/Â°F
k = adiabatic exponent for gas
n = polytropic constant for gas
s = entropy, Btu/lb/Â°R
T = absolute temperature, Â°R

s2 - s1 = Cv*((n-k)/(n-1))*ln(T2/T1)

by **nero** » Tue 08 Mar 2005, 01:12:19

How do you do all these fancy greek symbols?

by **EnviroEngr** » Tue 08 Mar 2005, 11:32:54

They're imported across DDE from COREL WordPerfect 8.0
I can PM them to you if you'd like to use them.

by **Sololeum** » Wed 09 Mar 2005, 18:28:09

When looking at the drastic figures of depletion rates for oil wells in over 600 metres of sea water - I began to wonder when people talk of percentage depletion, ie. 2.5% for the USA since 1973 etc. is it based on the peak flow rate or the annual flow rate -

Based on Peak Flow would give a steeper decline that that based on annual flows.

Can anyone help.

by **bodigami** » Fri 01 May 2009, 17:36:11

why is this a sticky? and why not change the title?

by **Aaron** » Sun 03 May 2009, 20:43:45

Whoa...

Posted: Wed Mar 09, 2005 6:28 pm... last response

by **bodigami** » Tue 05 May 2009, 16:08:10

Aaron wrote:Whoa...

Posted: Wed Mar 09, 2005 6:28 pm... last response

yeah, it has being a sticky for years with no more replies.

Mathematics, Calculations and Supporting Data

Equations

Greek

depletion percentages

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