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1) Evaporation and Bypass in Orange Juice Concentration. In a process for concentrating 1000 kg of freshly extracted orange juice containing 12.5wt% solids, the juice is strained; yield 800kg of strained juice and200kg of pulpy juice. The strained juice is concentrated in a vacuum evaporator to give an evaporated juice of 58% solids.
The 200kg of pulpy juice is bypassed around the evaporator and mixed with the evaporated juice in a mixer to improve the falvor. This final concentrated juice contains 42wt% solids. Calculate the concentration of solids in the pulpy juice, the kg of final concentrated juice , and the concentration of solids in the pulpy juice bypassed. (Hint: First, make a total balance and then a solids balance on the overall process. Next, male a balance on the evaporator. Finally, make a balance on the mixer.)
2) Heating and vaporization using steam tables. A flow rate of 1000 kg/h of water at 21.2C is heated to 110C when the total pressure is 244.2KPA in the first stage of a process. In the second stage at the same pressure the water is heated further, until it is all vaporized at its boiling point. Calculate the total enthaply change in the first stage and in both stages.
An electric heater heats air. The temperature sensor has a time constant of 5 seconds. The air temperature output (in °C), as measured by the temperature probe is: T=200+cos(0.5t)
a two stage compressor with intercooling between the stages is used to compress air from 1 bar and 150c to 9bar in a
a regenerative steam power cycle has a closed feedwater heater that heats 20 kgs of water from 100degc 20 mpa to
train starts from rest and accelerates uniformly at 0.35g to reach its max speed of 150 mph. just before arriving to
a rocket motor is used to accelerate a kinetic energy weapon to a speed of 3500 mph in horizontal flight. the exit
A Cylinder of mass 20 lbs, radius 5in and height 10in is spinning about its axis of symmetry (central axis) at 200 rpms. What is torque required to stop it from spinning
the free convection heat transfer coefficient on a thin hot vertical plate suspended in still air can be determined
air at 1 atm and 20 deg c is flowing over the top surface of a 0.2 m x 0.5 m-long metal foil. the air stream velocity
at the instant the cable fails the 180 lb crate is traveling up the plane with a speed of 15 fts. determine the speed
A rock is thrown straight down from the top of a cliff overlooking a canyon with an initial velocity 60 ft/sec and it hits the bottom of the canyon in 9 seconds. Determine the height from which the rock was thrown
Find Stall Speed (KEAS) at 1 G, 0 deg AOB and find Stall Speed (KEAS), level flight 70 deg AOB (2.9 G)
the gas-turbine powered plymouth ion built in 1960 had a turbine inlet temperature of 926 c a pressure ratio of 4and
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