Sonntag, Borgnakke and van Wylen
4.93 Air at a constant pressure in a piston cylinder is at 300 kPa, 300 K and a volume of 0.1 m3. It is heated to 600 K over 30 seconds in a process with constant piston velocity. Find the power delivered to the piston. Solution: . . Process: P = constant : dW = P dV => W = PV V2 = V1× (T2/T1) = 0.1 × (600/300) = 0.2 . W = P (∆V / ∆t) = 300 × (0.2-0.1)/30 = 1 kW