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Homework Statement
Atmospheric air at 300K and 100kPa is to be delivered to a line at 600K, 200kPa. Two possible schemes for doing this are suggested. The first scheme involves reversible adiabatic compression and then internally reversible isobaric heating. .The second scheme involves internally reversible isobaric heating first and then reversible adiabatic compression. In both cases heat exchange takes place with a reservoir at 900K. Assume an ambient condition of 100 kPa, 300K.
a) Determine work and entropy generation for both of the suggested ways.
Homework Equations
Q=m.Tb(s2-s1)-Tb.sigma sigma= entropy
The Attempt at a Solution
heat transfer only occurs at Tb, ignore KE Pe, air is ideal gas
mass and energy balances at steady state W=Q+m(h1-h2)
entropy balance gives Q/Tb+m(s2-s1)+sigma
I don't understand the difference betwwen 1 and 2