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Water at the rate of 230 kg/h at 35°C is available for use as a coolant in a double-pipe heat exchanger whose total surface area is 1.4 m2. The water [Cp = 4.2 kJ/kg · °C] is to be used to cool oil [Cp = 2.1 kJ/kg · °C] from an initial temperature of 120°C. Because of other circumstances, an exit water temperature greater than 99°C cannot be allowed. The exit temperature of the oil must not be below 60°C. The overall heat transfer coefficient is 280 W/ m2· °C. Estimate the maximum flow rate of oil that may be cooled, assuming the flow rate of water is fixed at 230 kg/h.
The tank air pressure above the water level is 300kPa(absolute) while the atmospheric pressure is 100kPA. Neglecting frictional effects, determine the initial discharge rate of water from the tank.(Density of water=1000kg/m^3)
A 782 pound 4WD vehicle is designed to clime a 16 degree ramp. What is the minimum acceptable coefficient of friction between its tires and the ramp surface?
a distillation column is separating phenol from p-cresol at 1 atm pressure. the distilshylate composition desired is
a storage tank is 40 feet above a river. water is pumped from the river to the storage tank at a rate of 0.095m3s. the
consider a cold canned drink left on a dinner table. would you model the heat transfer to the drink as one two or three
a 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat ready to dive each with a 16-fts
two sheets of a 1040 steel are joined together with an aluminum rivet. discuss the possible corrosion cells that might
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
a copper-clad steel sheet is produced by hot roll bonding. the cladding separated during deep drawing. what are some
an ideal gas at 300 k has a volume of 15 liters at a pressure of 15 atm. calculate 1 the final volume of the system 2
a brayton cycle is the same as the rankine cycle but it takes place in the ideal gas region of states. a large
you are offered a zero coupon bond worth 10000 in face value 20 years from now. assume that you believe inflation over
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