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An exit air bulk average temperature, T b,o = 127 0C, is required. Determine the exit h, the uniform heat flux and the exit tube surface temperature.
Compare the heat transfer coefficient form water to air using just Reynolds number to determine hc and then with Nusselt number to determine hc. Nu for water drops is Nu= 2 + 0.6Re1/2Pr1/3.
A Rankine heat engine with a net power output of 85000 hp has a thermal efficiency of 35%. Determine the rate of heat added to the engine.solve this problem by CyclePad.
Compute the mass rate of cold water required, in kg/min, if the water undergoes a temperature change in the evaporator of 4 K and the heat pump has a capacity unit of 1200 kJ/min.
Assuming the turbine to be isentropic and the compressor to have an isentropic efficiency of 80 percent, determine the power output of the plant. Do not assume constant specific heats.
A particular road vehicle weighs 4000 lb. Using the quarter-car model, determine a suitable value for the suspension stiffness, assuming that the tire stiffness is 1300 lb/in.
A uniform cylinder with mass m = 13kg and radius r is pulled from rest along level ground by a constant force F that acts on its center at an angle (theta) = 42 degrees with respect to the horizonta
As a particle moves from the origin to (12i + 6j) m, it is acted upon by a force given by (4i + 8j) N. Calculate the work done by this force on the particle as it moves through the given displaceme
Why is this problem simpler than for the turbulent boundary layer at moderate and high Prandtle numbers? what closed=form solution already in hand should be a good approximation? Why?
Dry air having a mass flowrate of 2 kg/s and a temperature of 300K merges with dry air flowing at 3 kg/s and having a temperature of 400K. What is the maximum temperature of the resulting mixture?
Determine the time t required for the disk to acquire its steady state angiular speed. the belt drive pulley rotates with a constant counterclockwise velocity w.
If the velocity v of the load is 2m/s down and the angular velocity w of the pulley is 8 rad/s counterclockwise at the time t =0, determine v and w after the cable tensions have been applied for 5 s
The pipe temperature increase to 220 degree F when in use. Determine the elongation of the pipe. The coefficient of thermal expansion for steel is .0000065 in./degree F.
Determine exit temp of oil and heat transfer rate between oil and water. Consider water and liquid as incompressible liquids and heat exchanger as very well insulated.
Determine total change in enthalpy of the gas (of amount 22kg + 10kg), by considering both the parts as one system. Consider Cp = 1.007kJ/(kg*K) for the gas.
A pulley with diameter D = 27in weighs 80 lb. It is mounted on a diameter d = 2-in axle. A weight of 1000 lb is to be lifted. If the coefficient of friction f = 0.1, what vertical pull force P will
Water at a flow of m = .215 kg/s is cooled from 82 degrees C to 42 degrees C by passing it though a thin-walled tube. What is the tube lenght if the coolant is water and V=7m/s.
When the pressure in the tank reaches 700 kPa, the entire refrigerant in the tank exists in the vapour phase only. At this point the valve is closed. Determine the final temperature in the tank.
Assuming the velocity is a parabolic function of v0 [1-(t/t0)2]. Determine the displacement x of the mass m for t less than or equal to t0. Assuming z= x - u.
Assuming that the bypassed air produces no thrust, and ignoring fuel mass, will the engine with bypassed air produce more thrust?
The vapour then expands adiabatically to a pressure 1.5 bar while doing 491.5 kJ/kg of work. Sketch the cycle on P-v coordinates Evaluate the heat and work for each process, in kJ Evaluate the therm
Determine The final temperature in the tank The mass of refrigerant that has entered the tank The heat transfer between the system and the surroundings.
Assuming that the bolt will be allowed to cool until 21 days into the outage, find the following the primary radioisotopes and activities of each in the bolt.
Determine the final velocity of each car, after all impacts, assuming (a) cars A and C hit car B at the same time, (b) car A hits car B before car C does.
Determine the net power developed by the plant, in kW, if the compressor and turbine operate without internal irreversibilities.