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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.
consider a carnot refrigeration cycle with a working fluid of r-134a operating between temperatures of -10oc and 20oc.
the compressor mechanism shown in figure is driven clockwise by a dc electric motor at a constant rate of 800 rpm. in
i water vapor enters a turbine at p1 5 bar t1320oc and exits at p2 1 bar. the work generated is measure as 250 kj per
a in a short section of a channel carrying a steady discharge of 36 m3s the depth is seen to increase from 1.6 m to
a tank contains 1 m3 air at 100 kpa 300 k. a pipe flowing air at 1000 kpa 300 k is connected to the tank and it is
a hypersonic gun tunnel is used to generate short-duration high-speed flows and typically consists of two cylindrical
at the beginning of the compression stroke the volume of a certain diesel engine cylinder is 1 liter and it is filled
Evaluate thermal efficiency of the cycle
a material element experiences 50 mpa compression in the x-direction 10 mpa tension in the y-direction and a negative
strawberries contain about 15 wt solids and 85 wt water.nbspto make strawberry jam crushed strawberries and sugar are
two kilograms of air within a piston-cylinder assembly executes a carnot power cycle with maximum and minimum
A vertical plate of length L = 2m (in the vertical direction), width w = 1m (in the horizontal direction) and temperature T = 300K is in free convection with air at T\infty = 320K. Find the total heat transfer from both sides of the plate
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