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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.
a cylindrical tank is to contain gas at a pressure of 400 psi and for safety reasons the hoop stress in the tank wall
On a single graph, plot "Hardness" as the ordinate versus "Aging Time" as the abscissa for each aging temperature - Discuss the effect of aging time and temperature on the effect of material hardness.
Calculate the resultant force at each support, and the force in each member and find all the lengths and angles in your truss.
a belt driven machine has a moment of inertia 240 ft-lb-sec2. the belt tensions differ by 80 lb as the belt passes over
a four cylinder four stroke diesel engine has a bore of 212 mm and a stroke of 292 mm. at full load at 720 revmin the
a single acting air motor has a bore of 380mm and stroke of 610mm. the supply pressure and temperature is 6.2 bar and
should electric power plants reject energy by heat transfer to large blocks of ice that are maintained by a
the frictionless piston has a mass of 16 kg. heat added until the temperature reaches 400 celcius if the initial x is
the aluminum plate of thickness t 3.5 mm. is to be designed so the maximum stress remains below 100 mpa. the hole must
a well-insulated pump steadily delivers water at a volumetric flow rate of 0.05 m3s through an insulated pipe of a
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 ?
a steam plant uses 3.045 tonne of coalh. the steam is fed to a turbine the output of which is 4.1 mw. the calorific
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