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Saturated steam condenses completely to liquid water at a rate of m1 = 2 kg/s at 40 bar pressure (saturation temperature ts=140 oC, heat of vapourisation hfg=2100 kJ/kg) in a heat exchanger with heat transfer surface area of 116 m2. The heat exchanger is employed to heat water (cw=4.2 kJ/kgK) from t2in=20 oC. The heat transfer coefficients by convection on the steam and water sides are h1 = 2200 W/m2K and h2 = 2200 W/m2K respectively. The thickness of the conductive surface is 0.005 m, and its thermal conductivity is 50 W/mK. Determine the logarithmic mean temperature, the water exit temperature t2out and the water mass flow.
a stream of refrigerant-134a at 1 mpa and 12 c is mixed with another stream at 1 mpa and 60 c. if the mass flow rate of
Design a bridge that will withstand 4 fully loaded semi-trailers
a disk has a mass of 4kg and a radius of 90mm it is at rest when it is placed in contact with the belt which moves with
An Industrial water shutoff valve is designed to operate with 30lbs of force and will encounter 200lbs of resistance force applied to a 1.5in diameter axle. What is the required actual mechanical advantage of the system?
the total pressure of air entering a single-stage centrifugal compressor is 1.013 bar and the total t is 288 k. the
air expands from 100kpa 40 degrees c with volume .75 m3 to 15kpa in a polytropic process with polytropic exponent n.
A large tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 13,300 N (3000 lbf). Determine the minimum required wire diameter, assuming a factor of safety of 2 and a yield strength of 860 MPa (12..
what two maintained tools will hurt an automotive technicians on the job performance?
a cylinder of radius a is balanced on top of a fixed cylinder of radius b b gt a . if the balance is slightly
a mass of 12 kg of saturated refrigerant-134a vapor is contained in a frictionless piston-cylinder device at 240 kpa.
problem 1 a 10-minute experimental run shows that 75 of liquid reactant is converted to product by a half-order rate.
1. a solid cube of copper with each side 1.0 ft is converted into metallic powders of spherical shape by water
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