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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 rankine cycle operating with ammonia is heated by some low temperature source so the highest t is 120oc at a pressure
wind is blowing on a 55-gallon drum. estimate the wind speed needed to tip the drum over. work in si units. the mass of
A project that will cost $750,000 will require payments as certain milestones are met. The initial payment is $50,000. When 30% of the work is complete an additional payment of $200,000 is due. When 70% of the work is complete another payment of $..
a gate is 0.5 m wide and 0.6 m tall and is hinged at the bottom. on one side the gate holds back a 0.5 m deep body of
steam enters a converging-diverging nozzle operating at steady state with p1 40 bar t1 400oc and a velocity of 10 ms.
three kg of air contained in a sealed deformable device at 150 deg c and 500 kpa is expanded to 150 kpa in an
at rockland steel we make steel coils that are ultimately used to form many common consumer products. one of our
liquid water enters a 25-kw pump at 100kpa pressure at a rate of 5kgs. determine the highest pressure the liquid water
a thin-walled closed-end cylindrical pressure vessel with spherical end caps is internally pressurized to 500 psi. if
a piston-cylinder assembly is fitted with stops. the assembly contains 0.1 kg of water initially at 1 mpa and 500degc.
two dimensional steady state conduction occurs in a hollow cylindrical solid of thermal conductivity k 16wmk outer r -
consider a sample of pure nickel in the shape of a coin. the area of the flat face is 1 cm2 and the initial thickness
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