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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 at 1mpa and 90 degrees c is to be cooled to 1 mpa and 30 degrees c in a condenser by air. the air
a reactor setpoint wasincreased from 160 psig to 190 psig. the reactor pressure transmitter was recalibrated from 0-200 psig to 0-300 psig. what is the percent span for the old and new setpoints?
the strength of titanium alloy is found to be 450 mpa when the grain size is 17 x 10-6 m and 565 mpa when the grain
heat is generated in a 2 mm diameter electric resistance wire k 10 wm-k uniformly at a rate of 5 kwm of length of
A process uses an oil of density 800 kg.m-3 and viscosity 80 mPa.s at a rate of 0.72 m3.h-1. Determine the rate of flow in each pipe
Saturated Steam is to be condensed on the shell side of a heat exchanger at 75°F. Cooling water enters the tubes at 50°F at a rate of 45 lbm/s and leaves at 65°F. Assuming the heat exchanger to be well-insulated, determine the rate of heat transfer i..
a schematic must show th tc qh qc wcycle. always show the hot reservoir at the top amp cold reservoir at the bottom.
Compared to cross-linked polymers, linear polymer chains:
the tensile strength of a copper sheet increases to 45 ksi by 25 cold work. we want to produce a 0.040 thick sheet of
a vertical cylinder containing air is fitted with a piston of 68lbm and cross sectional area of 35in2. the ambient
molesec of n2 is pressurized from 300 k and 10 bar to 100 bar. assume adiabatic. calculate the minimum power for this
you work for the city water department and need to pump 3400 litersmin of water from a tank at ground level into a
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