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A 45 MW turbine receives steam from 3 boilers. The first inlet has a mass flow rate of 10 kg/s at 4000 kPa and 800 deg C; the second inlet mass flow rate is 15 kg/s at 2000 kPa and 600 deg C; and the third boiler supplies steam at 1000 kPa and 500 deg C at a rate of 25 kg/s. The exit state is saturated mixture with a quality of 0.95 at 50 kPa. The temperature of the surroundings is 25 deg C.Determine:a) The rate of entropy generated for the turbine (answer: -25 kW/K)b) The rate of entropy change of the surroundings (answer: 41 kW/K)c) The total entropy generated, in kW/KIs this an irreversible, reversible, or impossible process?
a pure jet engine propels an aircraft at 250 ms through air at 45 kpa and -13 degc. the inlet diameter of this engine
consider the arrangement described in problem 1. a cable attached to the 100 lbm piston exerts a 200 lb force upward on
a loudspeaker is modeled with the following three equations.mx bx blittecoil blxldidt ri va - blxfind a transfer
the city of mcallen has a water filtration system that consists of a large rigid tank with a single 0.32 m diameter
what is the maximum constant speed in miles per hour a stock car can travel around the 1000 ft radius turns that are
some kg of ari is at an inital pressuuer aand temp of 1.73mnm2 and 175c it is expanded iso thermal to three volme and
a sugar mill in florida has been disposing of bagasse by open-air burning. by using the dried bagasse as boiler fuel in
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a geothermal vapor compression heat pump maintains the inside air supply of a building at 30 degc and operates with the
The piston is then move in,and heat is rejected bt the air reversibly at constant pressure until the volume is the same as it was initially.Calculate the net heat flow and the overall change of entropy.sketch the process of p-V and T-s diagram.
refrigerant 22 vapor enters the compressor of a refrigeration system at an absolute pressure of 20 lbfin.2. a pressure
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
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