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A closed feedwater heater for a steam power plant operates as shown in the figure below. High-pressure liquid water at 10 MPa and 300C enters a series of heating tubes. Steam at 1.5 MPa and 95% quality is sprayed over the tubes and allowed to condensate. The saturated liquid is subsequently allowed to leave the device at station 4. We assume that the high-pressure water is heated up to the saturation temperature of the condensing steam. We wish to calculate the mass of steam required per unit mass of incoming liquid. The heater is assumed to be well insulated.
An ideal vapor-compression refrigeration cycle uses R-134a as the working fluid in an air-conditioning system. The refrigerant enters the compressor as a saturated vapor at 40 °F
A circular shaft is subjected to a torque Ta and a bending moment Ma. Assuming that the diameter of the shaft is d, determine the expressions for the principal stresses and maximum shear stress in terms of Ma, Ta and d.
Calculations that show the material composition (fibre and matrix type and volume fractions) will meet the property specifications, and a justification of why this material composition is the cheapest option
a 825 mw electric power plant 36.2 efficient uses a coal with the following composition c 74.8 wt h 5.2 wt o 7.3
1 a barrel is rolled up an incline 20 ft along its length and 6 ft in vertical height by means of a rope that is
find the sum of two harmonic motions of equal amplitude but of slightly different frequencies. discuss the beating
what size unf bolt made from sae grade 5 steel is needed to carry a static tensile load of 3000lb with a safety factor
a machinist is making engine parts with axle diameter of 0.7 inch. a random sample of 15 parts shows mean diameter
the traveling crane consists of a 5-m-long beam having a uniform mass per unit length of 20kg/m. The chain hoist and its supported load exert a force of 8 kN on the beam when x=2m. draw the shear and moment diagrams for the beam.
calculate the critical heat flux on a large horizontal surface for the following fluids at 1 atm mercury ethanol and
a rigid tank contains 20 lbm of air at 50 psia and 80o f. the air is now heated until its pressure doubles. determine
using the compressibility chart determine the volume in m3 occupied by 20 kg of hydrogen h2 at 11.55 atm and -364 degf.
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