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A cogeneration plant is to generate power and 8600 kJ/s of process heat. Consider an ideal cogeneration steam plant. Steam enters the turbine from the boiler at 7 MPa and 500°C. One-fourth of the steam is extracted from the turbine at 600-kPa pressure for process heating. The remainder of the steam continues to expand and exhausts to the condenser at 10 kPa. The steam extracted for the process heater is condensed in the heater and mixed with the feedwater at 600 kPa. The mixture is pumped to the boiler pressure of 7 MPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine
(a) The mass flow rate of steam that must be supplied by the boiler,
(b) The net power produced by the plant, and
(c) The utilization factor.
an insulatedthin walled pipe of 100mm diameter is used to transport water to equipment that operates outdoors and uses
The uniform slender bar AB has a mass of 8 kg and swings in a vertical plane about the pivot at A. If thett^ = 2 rad/s when theta = 30 degrees, compute the force suported by the pin at A at that instant
For integrated circuits, Al lines are commonly placed on Si to act as electrical conductors between different parts of the device. Assuming that the Al is deposited at a temperature of 300oC, determine the CTE (Coefficient of Thermal Expansion) misma..
a hot-wire anemometer is a temperature-based instrument for measuring velocities in a flowing gas. the key component of
A survey of industry representatives conducted by the National Society of Professional Engineers indicated the #1 area in which more coursework was called for was:
Air initially occupying a volume of 1 m3 at 100 kPa, 20°C undergoes two internally reversible processes in series.
Evaluate the shearing and normal stresses at points H and J located at the ends of the horizontal and vertical diameters of transverse section located 2.5 in. to the left of bearing B.
refrigerant 134a at -10degc 1.4 bar and a mass flow rate of 280 kghr enters an insulated compressor operating at steady
determine the smallest horizontal force required to pull out wedge a. the crate has a weight of 200 and the coefficient
steam enters an adiabatic turbine steadily at 8 mpa and 500 c through an inlet with cross-section area of 0.041767 m2
the thermal reservoirs for a carnot engine are two constant pressure steam lines one at th 300 c and one at tl of 25
water at inlet 1 to a heat exchanger enters the heat exchanger through a circular pipe at a temperature of 200 oc a
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