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In a chemical plant a solution of density 1100kg/m3 and specific heat capacity 4.6 kJ/kg-Kis to be heated from 65 OC to 100OC. The required flow rate of the solution is 11.8 kg/s. Atubular heat exchanger is used for this with the solution flowing about 1.2 m/s in 25 mmbore iron tubes and being heated by wet steam at 115OC. The length of the tubes is not toexceed 3.5m . Taking inside, and outside heat transfer coefficient as 5 and 10kW/m2 and neglecting the thermal resistance of the tube wall estimate the number of tubes and the number of tube passes required.
A piston-cylinder device contains 25 ft3 of nitrogen at 40 psia and 700°F. Nitrogen is now allowed to cool at constant pressure until the temperature drops to 200°F. Using specific heats at the average temperature, determine the amount of heat los..
methane at 1 mpa 300 k is throttled through a valve to 100 kpa. assume no change in kinetic energy and ideal gas
when a ball is released from rest at a height of 5 ft above the floor it bounces to a height of 3.5 ft. if it is thrown
as a first step towards analyzing oblique shock waves in hypersonic flow consider the limiting case of infinite mach
The asymmetric simple truss is loaded as shown. Determine the reactions at A and D. Neglect the weight of the structure compared with the applied loads. Is the knowledge of the size of the structure necessary?
counters a and b are non-paralyzable with dead times of 30 or 100 microseconds respectively. at what true event rate
a 2.5 m tall steel cylinder has a cross sectional area of 1.5 m2 . at the bottom with a height of 0.5 m is liquid water
Calculate the change in velocity required in changing the position of a satellite in an orbit by 90 degrees. The initial and final orbit is circular around the Earth with a 15000 km radius. Calculate the delta velocity, semi-major axis and period for..
wouldnt the initial pressure of a friction-less piston-cylinder assembly that contains a water-vapor mixture be 200 kpa
Determine the savings associated with application of a 10-mm-thick coating of urethane insulation (k = 0.026 W/m · K) to the outer surface of the pipe.
1 /2kg of a liquid-vapor water mixture in a rigid tank initially at 2 bar is heated by 120V heater for 5 minutes until it becomes a saturated vapor at 4 bar. Changes in kinetic and potential energies can be ignored.
an ice chest is constructed of 0.4 mm thick plain-carbon steel plate a 1.9 cm thick layer of styrofoam k0.033 wm c and
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