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High-performance aircraft increasingly feature electronics that assist flight crews in performing their duties and reducing their fatigue. While these electronic devices improve aircraft performance, they also add greatly to the thermal load that must be managed within the aircraft. Cooling technologies currently used on aircraft are approaching their limits and other means are being considered, including vapor-compression refrigeration systems. However, unlike cooling systems used on earth, systems employed on aircraft must meet rapidly changing conditions. For instance, as onboard electronic devices switch on and off, the energy they emit by heat transfer alters the thermal load; additionally, the temperature of the air outside the aircraft into which such waste heat is discarded changes with altitude and flight speed. Accordingly, for vapor-compression systems to be practical for aircraft use, engineers must determine if the systems can quickly adapt to rapidly changing thermal loads and temperatures. The object of this project is to develop the preliminary design of a bench-top laboratory set-up with which to evaluate the performance of a vapor-compression refrigeration system subject to broadly variable thermal inputs and changing ambient conditions. Document your design in a report having at least three references.
The angular speed of wheelA is increased from restat a constant rate of 1.6 rad/s2 . Find the time forwheel C to reach the rotational speed of 100rev/min assuming the belt doesn't slip.
a single degree of freedom translational vibrating system has a concentrated mass weighing 77.2 lbs a spring constant
the girl at C stands pulls the rope horizontally at a constant speed of 6 ft/s. determine how fast the boat approcahes the pier at the instant the rope lenght AB is 50 ft.
The USEIA reported that in 2011, the average American household consumed 11,280 kWh for the year. On the outskirts of a small city, an energy company has constructed a single, large wind turbine (blade diameter 30 m). A typical average wind speed ove..
the turning moment diagram for a petrol engine is drawn to the following scales turning moment 1 mm 5 n-m crank
Two kg water at 120C with a quality of 25% has its temperature raised 20C in a constant volume process. What are the heat transfer and work in the process?
a hollow shaft has an outsaid diameter of 35 mm and an insaid diameter of 25 mm complute the torsional shear stress in
the upper surface of a 50-cm-thick solid plate k237 wmk is being cooled by water with temperature of 20 degrees
Air enters an adiabatic nozzle steadily at 300 kPa, 200oC, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. Determine Mass flow rate of air through the nozzle.
a pison-cylinder contains 0.8 kg of steam of 300oc and 1 mpa. the steam is cooled at constant pressure until one-half
The ball is kicked from point A with the initial velocity vA=10m/s. Determine the range R, and the speed when the ball strikes the ground
Detemine if the ball bounces down the steps without skipping any step and if the ball bounces down the steps without bouncing twice on the same step.
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