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At the nozzle exit the pressure is 14.7lbf/in2 and the velocity is 4055ft/s. Determine the rate of entropy production in Btu/R per lb of steam flowing.
A turbine produces 2 MW of power while accepting steam at 3 MPa and 400 C and rejecting steam at 50 kPa and 100C.
Assuming that both the turbine and the pump are isentropic, find the thermal efficency of the cycle. (consider water enters the pump as saturated liquid).
Find the temperature of the combustion products of butane when burned in an adiabatic steady flow combustor at 1atm with 40 percent excess air preheated to 200c.
Calculate the required heat transfer to or from the reactor (state which it is) in kJ. Calculate the heat of this reaction at 400 degrees C and 1 atm.
If the initial temperature of the product is 7°C, compute the convective heat-transfer coefficient. The thermal properties of the product.
Calculate the maximum mass flow rate at the inlet condition that this compressor can handle without violating the second law of thermodynamics.
Helium at 810 R, 45 Ibf/in^2, and a velovity of 10 ft/s enters an insulated nozzle operating at steady state. Determine rate of entropy production (deltaS) within the nozzle in Btu/lbm.R
Air within a piston-cylinder assembly initially at 12bar, 327 degree celcius undergoes an isentropic expansion to 1.4bar. modeling air as an ideal, determine the final temerature.
A wellinsulated counterflow heat exehanger operates at steady state. Determine: the rate of entropy production within the heat exchanger in KW/K.
Calculate the fraction of the water that condenses and the rate at which heat must be removed to deliver 1000 cubic feet per minute of humid air at the final condition.
Find the free-fall velocity of an 8.5-in-diameter sphere (bowling ball) weighing 16 lbfalling through the following fluids under the action of gravity.
What is the outlet pressure if the inlet pressure is 100 mm Hg and the velocity of blood is 20 cm/s. State all assumptions clearly?
Determine the channel height that can be used to determine the wall shear stresses as high as 20 dyne/cm2 with flow rates less than 2 cm3/s.
Show the cycle on a T-s diagram with respect to the saturation lines and determine (a) the quality of the steam at the turbine exit, (b) the thermal efficiency of the cycle.
The mechanical effficiency of the system is 80%. What is the average power input in Watts necessary to accomplish this? Assume constant velocity.
An ideal carnot heat engine has an efficiency of 40%. If the high temperature is raised 15% what is the new efficiency keeping the same low temperature?
Determine the fraction of the prototype speed in air at which the model test should be made in water to ensure dynamically similar conditions.
Find i) The maximum pressure shown by a gauge on the cooker ii) The quantity of heat transferred to the water when it just starts to boil (ignore heat capacity of cooker).
Determine the shortest time possible for the rear wheel drive, 2 Mg truck to achieve a speed of 16 m/s with a constant acceleration starting from rest.
What is the Biot number of this cooling situation? Would lumped capacitance provide an accurate method for analyzing the cooling?
The sphere is cooled by 20oC air with a convection heat transfer coefficient of 100W/m^2*K?. What is the sphere's surface temperature?
At what true event rate will dead time losses (not to be confused with dead time) in counter B be twice as great as those for counter A?
Steam at 95 bar and 400 C is supplied in turbine. The condenser pressure is 0.035 bar. If the plant operates as a Rankine cycle, calculate: Heat transferred to the condenser cooling water.
Estimate the convective heat-transfer coefficient for natural convection from a horizontal steam pipe. The outside surface temperature of the insulated pipe is 80°C.