THE UNIVERSITY OF MICHIGAN
Department of Mechanical Engineering
ME 235 Thermodynamics I / Winter 2014 / Section 002
Due date: Feb. 27 2014
4.19 An airport ventilation system takes 2.5 m /s air a°C1into a furnace and heats i°Cto 52
and delivers the flow to a duct with cross-sectional area 0.4 m at 110 kPa. Find the mass flow rate and
the velocity in the duct?
4.22 A diffuser receives 0.1 kg/s steam at 500C. The exit is at 1 MPa, C with negligible
kinetic energy and the flow is adiabatic. Find the diffuser inlet velocity and the inlet area.
4.35 Carbon dioxide used as a natural refrigerant flows out of a coolerC after which it is
throttled to 1.4 MPa. Find the state (T, x) for the exit flow.
4.43 A windmill with rotor diameter of 20 m takes 40% of the kinetic energy out as shaft work on a day
with 20C and wind speed of 35 km/h. What