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A 20 MW back-pressure steam turbine receives steam at stagnation pressure of 4 MPa and stagnation temperature of 300oC, exhausting from the last stage at stagnation pressure of 0.35 MPa. The turbine isentropic efficiency is 0.884, and mechanical losses are 2% of the actual enthalpy drop. Sketch the expansion process in Mollier diagram. Determine the rate of steam flow.
At the exit from the first stage nozzles the steam velocity is 244 m/s, specific volume 0.0686 m3 /kg, mean diameter 762 mm and steam angle 76o measured from the axial direction. Determine the nozzle height of this stage.
suppose we wish to test the hypotheses ho u15 h1 u does not 15 where we know that sigma2 9.0. if the true mean is
a small sphere of reference-grade iron with a specific heat of 447 jkgk and a mass of 0.515 kg is suddenly immersed in
steam enters an adiabatic turbine at 8 mpa and 520 degc with a volumetric flow rate of 0.8 m3s and exits at 30 kpa. the
the combustion products in an internal combustion engine undergo an expansion process from an initial volume of 0.007
2.51 a body whose surface area is 0.5 m2 emissivity is 0.8 and temperature is 150 is placed in a large evacuated
a 10 ft3 vessel contains steam at 200 psi and 500degf. a valve on top of the vessel is opened and steam is expelled to
a power plant is analyzed as a simple ideal rankine cycle with a boiler operating at 300 oc. steam leaves the boiler
Cylinder problem, Determine the strains in thick walled cylindrical vessel with inside diameter 1000 mm and outside diameter of 1400 mm
i derive an expression for the relation between heat loss and temperature difference across the inner and outer
a 200mm long 10mm dia. tensile sample experienced plastic deformation at a strain of 0.01. the applied load was 78.5
Model the earth as a sphere with a diameter of 8,000 miles. Using 14.7 psia as the average pressure at the earth's surface and ignoring variation in g with altitude, estimate the weight of the earth's atmosphere in lbf, and its mass in lbm.
the beam ab is subjected to the uniformly distributed load shown and to two unknown forces p and q. knowing that it has
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