1. The problem statement, all variables and given/known data A gas (treated as air) powered turbine provides power to a compressor which then sends the compressed air through an intercooler (heat exchanger). Turbine: Gas enters @ 0.03kg/s, 370 degrees Celsius Gas leaves @ 300 degrees Celsius and a "lower pressure" Compressor: Draws fresh air @ 0.015kg/s, 30 degrees Celsius, 100kPa Air leaves at a "higher pressure" Heat exchanger: The intercooler cools the compressed air down to 70 degrees celsius Ambient air flowing through/across the intercooler is @ 30 degrees Celsius, 100kPa Ambient air leaving the intercooler is @ 60 degrees Celsius Q1.) Calc Power output of turbine. Constant avg spec heats Cp=1.005 @ 300K Q2.) Calc temp of air leaving compressor. Const avg spec heats Cp = 1.005 @ 300K Q3.) Calc mass flow rate of the ambient air leaving the intercooler (not the compressed air going to the engine) - Use variable spec heats for extracted from tables 2. Relevant equations Q*-W*=m*[h2-h1+(V22-V12)/2+g(z2-z1] Δh=Cp(T2-T1) 3. The attempt at a solution Q1.) -W*=m*[h2-h1] First I found Cp at Tavg=335 Celsius or 608K..Cp=1.05324 So then -W=m*(Cp(T1-T2)) -W=0.03(1.05324(370-300) =2.2118Watts Q2.) -W*=m*[h2-h1] -W=m*(Cp(T2-T1)) 2.2118=0.015(1.005(T2-30C) T2= 176.72 Celsius Q3.) I'm absolutely stumped with this one..Ive gone to the "Ideal-gas properties of air" table in the book and picked the enthalpy values for T1 and T2...but don't know where to go from there. I know I'm lacking with units, just focusing on the method and will go back and straighten that out after.