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Assuming that the compressor operates in a reversible manner, determine the exit pressure of the R-410a and the specific work required.
The pressure is held constant as the air cools to 50°C. Assuming that the rate of flow entering the compressor is 0.15 kg/s, determine the total rate of entropy generation.
A Stirling engine works on a cycle consisting ofthe following four internally reversible processes. Assume the working fluid to be Air as an ideal gas and determine the thermal efficiency of the cycle
Determine the power produced by this engine when it is operated at 1800 rpm. Use constant specific heats at room temperature.
Calculate the top speed (at sea level) of the vehicle if the only external forces on the vehicle are the friction between the tires and the road and the aerodynamic drag.
Calculate thermal efficiency and mean effective pressure for this cycle. Use constant specific heats at room temperature.
The tube has ans inside diameter 30mm and a bulk T of 20 C and a wall T of 30C. Determine the coefficient of heat transfer if a) the mass flow is 0.04 kg/s, b) if the mass flow is 0.4 kg/s.
If a spring is inserted in series with the damper, then what is the best value of the stiffness of this spring in order to have a TR <0.08 when the machine is at its operating speed?
This solution is pumped to various buildingsfor the purpose of air conditioning. The refrigerant evaporates at -10 C with a total mass flow rate of 7.23 kg/s, and condenses at 600 kPa. Determine the
The boiler is sized to provide a steam flow of 57.03 kg/s. Determine the power produced by the turbine and consumed by the pump.
The bi-fold hangar door is opened by cables that move upward at a constant speed. Determine the position theta of panel BC when the angular velocity of BC is equal but opposite to the angular veloci
For the same change in state of the air, is the mechanical-power requirement per mole of air greater or less for nonadiabatic than for adiabatic operation? Why?
Determine the local heat transfer coefficient at a distance 0.457 m from the leading edge, for a plate surface temperature of 127 C.
Find solution to second order ODE with constant coefficients. First solve for the homogeneous solution, and then solve the nonhomogeneous case by the method of undetermined coefficients.
Calculate an estimate of the average heat transfer coefficient on the outside of the pipe. Calculate the drag on the pipe caused by the cross-flow.
Model the exhaust as air at atmospheric pressure and assume the wall temperature of the pipe is 100oC. Neglect entrance effects. Calculate an estimate of the pressure drop in the pipe if the inside
Determine the Max shear developed on the web of this beam and the location where is acts. Beam is 10ft long. A is at 0, B is 8ft from A, C is 10 ft from A. 1.5kip/ft from A to B. 8 kip load at C. A
Compressor, air enters 100 kPa and 17C and exits compressor 600 kPa and 167C. Calculate the rate of entropy generation during the process?
If the exhaust temperature is desired to be no greater than 200 degrees Celsius, determine the mass flow rate of air required.
In the interest of minimizing heat transfer from the plate, which orientation, (A) or (B), is preferred? What is the convection heat transfer from the front surface of the plate when it is in the pr
The kinetic coefficient of friction between the package and the incline is 0.2. Determine the deformation of the spring in bringing the package to rest.
Stagnation pressure and stagnation temperature is 500 kpa and 1000k. Ae=0.02m^2. The exit pressure is 100 kpa. what is the mach number at the throat and the mass flow rate through the nozzle.
Assuming that the fluid (water) is at a temp of 80 F and flows along a plate of 2.5ft wide and 40 ft long paraellel to the long side, calculate the shear force.
Gear A accelerates clockwise from rest to 100 rpm in 2 seconds. Determine the angular acceleration of gear B and the linear acceleration of rack C.
Determine the change in the internal energy and enthalpy of water on the basis of the (a) compressed liquid tables, (b) incompressible substance approximation and property tables, and (c) specific-h