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Find the specific flow exergy into and out of the steam turbine in Example 7.1, assuming an ambient at 293 K. Use the exergy balance equation to find the reversible specific work. Does this calculation of specific work depend on T0?
Example 7.1
Steam enters a steam turbine at a pressure of 1 MPa, a temperature of 300?C, and a velocity of 50 m/s. The steam leaves the turbine at a pressure of 150 kPa and a velocity of 200 m/s. Determine the work per kilogram of steam flowing through the turbine, assuming the process to be reversible and adiabatic.
A rigid-walled cubical container is completely filled with water at 40F and sealed. The water is then heated to 100F. Determine the pressure that develops in the container when the water reaches this higher temperature.
A glass is cleaned in 45 0C hot water and placed onthe table bottom up. The room air at 20 0C thatwas trapped in the glass gets heated up to 40 0C andsome of it leaks out so the net resulting pressure inside is 2 kPaabove ambient pressure of 101 kPa...
A car with mass 1275 kg is driven at 60 km/h when the brakes are applied quickly to decrease its speed to 20 km/h. Assume that the brake pads have a 0.5-kg mass with a heat capacity of 1.1 kJ/kg K and that the brake disks/drums are 4.0 kg of steel..
(a) Use differentiation to find a general expression for the rocket's velocity as a function of time, (b) When is the velocity zero?
Knowing that portion AC of the rope lies in a plane parallel to the xy plane and that the magnitude of the tension T in the rope is 62 lb, determine the moment about O of the resultant force exerted on the pulley by the rope.
Describe how you analysed and defined a problem and identified the engineering knowledge and skills required for solving the problem?
calculate the depth of water in a stormwater pond resulting from a two hour rainfall event. the rainfall occurs over a 24-acre watershed at an average rate of 1 inch/hour. the runoff coefficient is 0.5.
Compute the area in acres of a triangular parcel of land whose sides measure 48.78 mm, 84.05 mm, and 69.36 mm on a vertical photograph taken from 6050 ft above average ground with a 152.4 mm focal length camera.
sled and rider with a total weight of 200 lb travel down smooth slope defined by equation y=x^2/20. At x=40 ft the sled's speed is 10 ft/s. At x=40 ft determine rate of increase of speed and the normal force which the slope exers on the sled.
If the elevation difference between the water surfaces is y = 25 + x/11 metres, what minimum pipeline diameter will be required to convey the design discharge? Once your design is complete, determine the actual discharge. The value of x equals 23.
What are the functions of the rectifier and the regenerator in an absorption refrigeration system?
a. Use algebra and linearity of the expectation operator to find the answer. b. Explain how the transformation affects the drawing of the scatterplot we used to develop our understanding of covariance, and therefore why the answer to part a. shoul..
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