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A counter-flow double pipe heat exchanger is heat water from 20 degrees Celsius to 80 degrees Celsius at the rate of 1.2 kg/s. The heating is to be accomplished by geothermal water available at 160 degrees Celsius at a mass flow rate of 2 kg/s. The inner tube is thin-walled and has a diameter of 1.5 cm. if the overall heat transfer coefficient of the heat exchanger is 649 W/m2K, determine the length of the heat exchanger required to achieve the desired heating.
an air-conditioning unit with a coefficient of performance of 2.93 provide 5000 btuh of cooling while operating during
two concentric helical compression springs made of steel and having the same length when loaded and when unloaded are
consider an air-standard brayton cycle. what is the efficiency of the brayton cycle if the pressure ratio is 20 and the
changes made to stainlees steel piping to reduce intergranular stress corrosion cracking describe four modifications
develop a vba program that can determine numericlly integral of any given set of data points using combination of
a material is sought for a high speed centrifuge. the objective is to acheive as high an angular velocity w of the
a 25 mm diameter uniform steel shaft is 600 mm long between bearings.a find the lowest critical speed of the shaftb if
a 0.075 kg ice cube at 0 degree c is dropped into an insulated styrofoam cup holding 0.33 kg of water at 25.0 degree c.
a cylindrical steel rod 0.5 in diameter is cold worked to reduce the area. the new diameters in 3 cases are 0.43in
find the equal annual payment series that would be equivalent to the following increasing series of payments if the
a 100 kva 3- phase star- connected transformer has a primary voltage of 11000 v and a secondary voltage of 440 v and it
If the bullets stick to the block and they move together find the velocity of the final system and find the total impulse of each bullet if the movement takes 0.5s before coming to a stop.
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