EX1-336-W07 - ME 336 EXAM 1 C BORGNAKKE ME Problem 1(30...

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ME 336 EXAM 1, FEBRUARY 19, 2007 C. BORGNAKKE, ME Problem 1 (30 Points) Superheated steam at 400 kPa, 250 o C is flowing at 2 kg/min into a desuperheater chamber where a flow of saturated liquid water at 400 kPa is added in another line so the output flow is exactly saturated water vapor at 400 kPa. a) Find the flow rate of the saturated liquid flow b) Find the total entropy generation rate in the process. Problem 2 (30 Points) A refrigerator receives 600 W of electrical power to the compressor driving the cycle flow. The refrigerator has a COP of 3.0 operating with an average high temperature of 45 o C and a low temperature of of -5 o C. a) Find the rate of heat transfer out of the cold space b) Find the rate of heat transfer into the warm space c) Find the rate of exergy destruction in the refrigeration cycle Problem 3 (30 Points) A harbor fire and rescue boat has a water cannon on deck. The smallest exit hole in the
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EX1-336-W07 - ME 336 EXAM 1 C BORGNAKKE ME Problem 1(30...

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