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It is proposed to build a one million kW electric power plant with steam as the working fluid. The condensers are to be cooled with river water at a flow rate of 5 x 108 lbm/hr. The maximum steam temperature will be 1000 F and the pressure in the condensers will be 1 psi. As an engineering consultant, you are asked to estimate the resulting temperature rise of the river far downstream of the plant. What is your estimate? In the Process of estimating this change in temperature, also calculate the heat transfer in the condensers. Assume a Cp for water of 1 Btu/lbm degree Rankin.
Load that can be lifted by aerostat balloon An aerostat balloon is filled with hydrogen. It has a volume of 1000m^3 at constant air temperature of 27 degree C and pressure of 0.98bar.
a thin 30 cm x 30 cm flat plate is pulled at 3 ms horizontally through a 3.6 mm think oil layer sandwiched between two
a 25d kg iron stove contains 5 kg wood and 1 kg of air. all the masses are at room temperature 20 degrees c and
a small household refrigerator is used to cool 20 liters of water initially at 22 degrees c. the cop of the
A piston-cylinder arrangement holds a thermally perfect gas at p1=100kPa and T1 = 300K. Assume that cp = 1.0035 kJ/kg-K, cv = 0.7165 kJ/kg-K, and R = 0.287 kJ/
a large supply line at 350 k and 0.5 mpa is connected to the inlet of a well-insulated 0.002 m3 tank. the tank has mass
the drag on a 2-m-diameter satellite dish due to an 80-kmhr wind is to be determined through a wind tunnel test using a
molecules that are of density row180 kgm3 and spe- cific heat cp 3000 jkg k have an initial relaxed length of l2nm.
Air at 40 °C, 1 bar, and 10% RH goes through an evaporative cooler, and the outlet air is cooled to 27 °C. Find (a) the relative humidity at the outlet, and (b) the amount of water added (kg H20 per kg of air).
Ammonia vapor in a piston-cylinder assembly undergoes a constant-pressure process from saturated vapor at 10 bars. The work is +16.5kJ/kg. Changes in kinetic and potential energy are negligible. Determine (a) the final temperature of the ammonia in d..
a tube with elastic modulus of 75 gpa is used to support a compressive load. it is required that this tube must not
Two fully annealed cylindrical specimens of an alloy are to be hardened by reducing their (always circular) cross-sections in an extrusion process. For one specimen, the initial and post-deformation radii are 15mm and 12 mm, respectively.
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