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The technical literature contains discussions of ways for using tethered kite-mounted wind turbine systems to harvest power from high-altitude winds, including jet streams at elevations from 6 to 15 kilometers (4 to 9 miles). Analysts estimate that if such systems were deployed in sufficient numbers, they could meet a significant share of total U.S. demand for electricity. Critically evaluate the feasibility of such a kite system, selected from the existing literature, to be fully operational by 2025. Consider means for deploying the system to the proper altitude, how the power developed is transferred to earth, infrastructure requirements, environmental impact, cost, and other pertinent issues. Write a report including at least three references.
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
An iron-carbon alloy initially containing 0.55 wt% C is exposed to an oxygen-rich and virtually carbon-free environment at 1325 K. Under these conditions, the carbon diffuses from the alloy and reacts with oxygen at the surface.
a 150-lbm astronaut took his bathroom scale aspring scale and a beam scale compares masses to themoon where the local
Refrigerant-134a is throttled from saturated liquid state at 7 bar to a pressure of 1.4 bar. Determine the temperature drop during this process and the final specific volume.
At a point in a loaded body the stresses relative to an xyz coordinate system are given by the following stresses in MPa xx=xy=40, xz=30, yy=zz=20, xz=0. Determine the normal stress and shear stress on a plane whose outward normal is oriented at angl..
Assuming saturated properties out of the evaporator and condenser
a wellinsulated counterflow heat exehanger operates at steady state. in one stream liquid water enters at 10 degree
Air enters the evaporator at 14.7 psia and 90 F with a volumetric flow rate of 200 ft3/min. Refrigerant 134a at 20 psia with a quality of 30 % enters the evaporator at a rate of 4 lbm/min and leaves as saturated vapor at the same pressure. Assume ste..
a cantilevered bar is 500 mm long with square cross section 25mm x 25 mm. three perpendicular forces are applied to its
a carburizing process is carried out on a 0.10c steel by introducing 1.0c at the surface at 980degreesc where the iron
A 3 in. diameter low strength, stainless steel cylindrical part is to be turned on a lathe at six hundred rpm. With a depth of cut of .3 inches and a feed of .025 in/rev. what should be the minimum horsepower of the lathe?
air enters the compressor of an air-standard brayton cycle at 100kpa 300k with a volumetric flow rate of 5m3s. the
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