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1. A shell-and-tube exchanger (two shells, four tube passes) is used to heat 10,000 kg/h of pressurized water from 35 to 120°C with 5000 kg/h pressurized water entering the exchanger at 300°C. If the overall heat transfer coefficient is 1500 W/m2 · K, determine the required heat exchanger area.
2. Consider the heat exchanger of Problem 11.14. After several years of operation, it is observed that the outlet temperature of the cold water reaches only 95°C rather than the desired 120°C for the same flow rates and inlet temperatures of the fluids.
the diameter of a cylindrical water tank is d0 and its height is h. the tank is filled with water which is open to the
When a total amount of 125,000 joules of heat is transferred to a piece of 5 kg alloy, its temperature changes from 25 C to 60C, what is the specific heat capacity of this material?
Atomic radius and atomic weight of niobium are 0.143nm and 92.91 g/mol respectively. Calculate Nb density assuming (1) FCC, and (b) BCC crystal structures. Compare the values with t the available Nb density from the textbook (Materials Science and En..
a rigid tank whose volume is 0.5 m3 initially containing ammonia at 20oc 1.5 bar is connected by a valve to a large
a light truck weighs 3100 lb and is rated at 30 miles per gallon for a 60 mph highway driving on level ground. how much
One kilogram of nitrogen gas (N2) is undergoes an isothermal compression from 1 bar, 20C to a final pressure of 12 bar. During the process, the nitrogen transfers heat through a wall to a thermal reservoir with a temperature of 10C.
the bar rotates in the horizontal plane about a smooth pin at the origin. the 2 kg sleeve a slides on the smooth bar
a square-threaded power screw with single thread is used to raise a load of 25000lb. the screw has a mean diameter of 1
intake air to turbocharger for internal combustion engine is 100kpa at 300k. determine the turbocharger pressure ratio
Investigating A Dynamic Movement in Polar Coordinates
A rigid tank A of volume 0.6 m^3 contains 3 kg of water at 120 degrees C, and rigid tank B has a volume of 0.4 m^3 with water at 600kPa and 200 degrees C. The tanks are connected to a piston/cylinder initially empty with closed valves.
a frictionless piston is raised by slowly heating the gas contained in the cylinder. the initial pressure is 2 bar and
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