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Water exiting the condenser of a power plant at 38ºC enters a cooling tower with a mass flow rate of 4.5 x 107 kg/h. A stream of cooled water is returned to the condenser from a cooling tower with a temperature of 30ºC and the same flow rate. Makeup water is added in a separate stream at 20ºC. Atmospheric air enters the cooling tower at 25ºC and 35% relative humidity. Moist air exits the tower at 30ºC and 95% relative humidity.Determine the mass flow rates of the makeup water and dry air in kg/h. The cooling tower operates at steady state. Heat transfer with the surroundings can be neglected, as can changes in kinetic and potential energy. The pressure remains constant at 1.0 atm throughout.
a two-engine jet transport has a loaded weight of 90000 lb and a forward thrust of 9800 lb per engine during takeoff.
Niobium forms a substitutional solid solution with vanadium. Compute the weight percent of niobium that must be added to vanadium to yield an alloy that contains 1.55 x 1022 Nb atoms per cubic centimeter. The densities of pure Nb and V are 8.57 an..
an ideal gas is brought through an isothermal compression process. the 2.00 moles of gas go from having an initial
Use Lagrange"s equations to derive the EOM for the system. You have a function L of some What are Lagrange"s Equations?
Determine the turbine inlet temperature, the cycle thermal efficiency, and the back-work ratio of this cycle.
the coefficients of friction are ms0.40 and mk0.30 between all surfaces of contact. determine the smallest force p
an elevator moves downwards at a constant velocity v0. while descending at a particular height assuming t0 the velocity
What should the diameter of the nozzle outlet be in inches and what is the mass flow rate of steam through the nozzle in lbm/min?
an electric motor has a rotor with a mass moment of inertia of 30 ft-lb-s2. what torque is required to accelerate it
a tank of 50 ft3 volume contains saturated ammonia at a pressure of 200 lbfin2. initially the tank contains 50 liquid
the metal rhodium has a fcc crystal structure. if the angle of diffraction for the 311 set of planes occurs at 36.12deg
a 1000kg car is moving horizontally at a constant speed of 10kmhr on a straight path. what is the absolute minimum
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