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A shell-and-tube heat exchanger with one shell pass and two tube passes is used as a regenerator, to pre- heat milk before it is pasteurized. Cold milk enters the regenerator at Tc,i 5°C, while hot milk, which has completed the pasteurization process, enters at Th,i 70°C. After leaving the regenerator, the heated milk enters a second heat exchanger, which raises its temperature from Tc,o to 70°C.
Gas and the burner has an efficiency of 90%, what would be the annual savings in energy and fuel costs associated with installation of the regenerator? The facility operates continuously throughout the year, and the cost of natural gas is Cng $0.02/MJ.
Refrigerant 134a enters a 28-cm diameter pipe steadily at 200 kPa and 200C with a velocity of 5 m/s. The refrigerant gains heat as it flows through the pipe and leaves the pipe at 180 kPa and 400C. Determine the volumetric flow rate of the refrigeran..
identical 9.00 microc charges are fixed to adjacent corners of a square. what charge magnitude and algebraic sign
a tie bars is to be made in two parts to facilitate adjustment in length during assembly. sketch the arrangements. draw
A copper ball with a diameter of 2 cm is removed from an oven at a uniform temperature of 200°C. Upon removal from the oven, it is subjected to a flow of air at 1 atm and 20°C with a velocity of 8 m/s for a certain period of time so the surface tempe..
Micro structural analysis of a slowly cooled Al-Si alloy indicates there is a 6 volume % silicon-rich proeutectic phase. Calculate the overall alloy composition (in weight percent).
consider the turbocharger of an internal combustion engine. the exhaust gases enter the turbine at 450 c at a rate of
A train car has a mass of 17500 kg and is travelling at 10 m/s to the right on a horizontal track. At the same time, another train car with a mass of 12500 kg is travelling on the same track at 6 m/s in the opposite direction. The coefficient of kine..
1) What do you think of a handheld vacuum? 2) How often do you use a handheld vacuum? 3) What do you like about handheld vacuum?
the yield stresses of several samples of a steel containing 0.12 carbon with different grain sizes were measured. the
Plot (or provide an animation) of the four bar mechanism in at least 3 positions throughout the motion (on one diagram). Describe how the mechanism is designed in order to maintain planar motion (i.e. how are constraints applied to limit motion).
A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3/s of water? What is the effect of the water temperature on the pump power that is required?
Which chromium plating is more eco-friendly - trivalent or Hexavalent? Justify your answer in the light of environmental issues caused.
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