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Steam enters a turbine at 12 MPa, 550°C, and 60 m/s and leaves at 20 kPa and 130 m/s with a moisture content of 5 percent. The turbine is not adequately insulated and it estimated that heat is lost from the turbine at a rate of 150 kW.The power output of the turbine is 2.5 MW. Assuming the surroundings to be at 25°C, determine (a) the reversible power output of the turbine, (b) the exergy destroyed within the turbine, and (c) the second-law efficiency of the turbine.
A pump station has been designed to lift water out of a 6 metre deep pit (vented to atmosphere) via a centrifigual pump mounted at ground level. Calculate the Net Positive Suction Head (NPSH) for the system ?
water flows through a horizontal pipe at a rate of 1gals. the pipe consists of two sections of diameters 4in and 2in
water is heated in an insulated chamber by combining it with steam. the water enters at a steady rate of 100 kgmin at
a cyclic steam power plant is to be designed for steam temperature at inlet of 360 and an exhaust pressure of 0.08 bar.
calculate the cost per piece of a milling operation that is used to machine a pocket of 2x3x0.5 lxwxd. the material
atank of 0.1-m3volume contains air at 298.15k 25degc and 101.33kpa.the tank is connected to a compressed-air line which
5 kg of air initially at 10oc and 100 kpa is in piston-cylinder device. initially the piston is resting on a set of
water flows in a circular pipe. at one section the diameter is 0.3 m the static pressure is 260 kpa gage the velocity
a power cycle operates between a lakes surface water at a temperature of 300 k and water at a depth whose temperature
in a carnot cycle heat is supplied at 350degc and rejected at 27degc. the working fluid is water which while receiving
the molar volume of al2o3 at 25 degrees celsius and 1 atm is 25.715 ccmol. its coefficient of thermal expansion is 26
the thermal conductivity parallel to continuous reinforcing fibers in a composite with e-glass in a matrix of polyester
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