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Water is the working fluid in an ideal vapor power cycle with reheat. Superheated vapor enters the first turbine stage at 8 MPa, 500oC and expands to 2 MPa. Then, it is reheated to 500oC before entering the second turbine stage, where it expands to the condenser pressure of 7.5 kPa. The mass flow rate of steam entering the first turbine stage is 2630 kg/h. Assume a source temperature of 1500 K and a sink temperature of 300 K. Take T0 = 300 K. Sketch the cycle on a T-s diagram with respect to saturation lines and determine (a) the rate of the heat input to the working fluid, in kW, (b) the rate of the heat rejected from the working fluid, in kW, (c) the net power output, in kW, (d) the thermal efficiency of the cycle, (e) the exergy destruction associated with each of the processes, in kW, and (f) the second law efficiency.
calculate the largest semicircular surface flaw oriented along the axis of the bores that could withstand a fluid pressure of 50MPa.
A 4 m diameter sphere is embedded in insulation. The sphere contains a liquid-ice mixture maintained at 0 deg C. The ambient temperature surrounding the insulation is 25 deg C.
a heat exchanger is to be designed to condense 1100 kghr of steam ay 150 kpa. for this purpose cooling water at 50
tankless point-of-use water heaters are commercially available and are claimed to reduce energy usage since water is
a piston cylinder device contains 0.25 kg of air initially at 1.8 mpa and 360 degc. the air is first expanded
Determine the outlet temperature of the hot fluid.
observing plastic deformationthe aim of this demonstration is to make some observations of the surface relief produced
1. assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
a 1.5 ton crate is hoisted by three steel wires. each wire is 1/4 in. in diameter and each carries one-third of the load. determine the stress in the wires.
A rigid tank contains water vapor at 200 degrees celcius and unknown pressure. When the tank is cooled to 150 degrees celcius, the vapor starts condensing. Estimate the initial pressure in the tank.
the masses of the bar and the disk are 5 kg and 10 kg respectively. the coefficient of kinetic frictionnbspbetween the
an old-style wooden irrigation gate is opened by pulling on a steel cable that connects to the bottom of the gate. how
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