Recent content by FreelandME

then i use the T2 and T1 to find enthalpies from ideal gas proprties of air table and solve Q12 - W 12 = m [ h2 - h1 + (V2- V1)/2+ g (z2-z1)] (1) where z2-z1=0 m=0.576 kg/s Q=0.1 W and h2-h1 the enthalpies from the table? Is that correct right?

So the m=pA2V2 => p=9.6 kg/m3 from ideal gas law p=MP/RT we get T2~367.78 K is that correct or do i miss something ?

So i find from the ideal gas law that the density of air is ~1.28 kg/m3 so with that i find the mass flow which is m=0.576 kg/s , but how can i find the temperature in outlet in order to find the h2 and finish the problem

There is no information about either , the only thing we can use are thermodynamic tables but i really have no idea how to use them in the current problem

Homework Statement Air enters a compressor at 100kPa and 20 oC in steady flow rate . Air is compressed to 1 Mpa. The heat loss is 10% of the power of the compressor . Air enters with speed of 50m/s in a surface of 0,009 m2 and leaves with speed 120 m/s from a surface of 0,0005 m2. Find the...

Nothing has been left out

I'm pretty sure we use the ideal gas law to find the density and then with multiplication of density with the volume flow rate we find the mass flow rate, now some questions as Q we use the heat that the refrigant absorbs so Q=-750KJ/min , the W we finally get is the axial work I am looking for...

Q12 - W 12 = m [ h2 - h1 + (V22- V21)/2+ g (z2-z1)] (1) and since we have kinetic and dynamic energies neglible Q12 = 0 E(mass in-mass out) = 0 aswell so we take from 1 W12= h2 - h1 after working out a bit with it that's what i finished to , i find enthalpies from tables with linear...

Homework Statement [/B] Thermodynamics problem Air enters a compressor at a temperature of 290 Kelvin and pressure 100 kPa with a stable volume flow of 2.5 m^3/s. The output temperature of the compressor is is 400 Kelvin and the velocity of the flow is 30 m/s. Air is implied to be an ideal gas...