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Air enters the compressor of a regenerative gas-turbine engine at 300 K and 100 kPa, where it is compressed to 800 kPa and 580 K. The regenerator has an effectiveness of 72%, and the air enters the turbine at 1200 K. For a turbine efficiency of 86%, determine (a) the amount of heat transfer in the regenerator and (b) the thermal efficiency of the cycle.
a manometer is connected to a water pipe to measure the pressure at the center of the pipe. the manometer is
A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at..
natural gas methane flows from a 33-in diameter gas main through a 1-in-diameter pipe and into the burner of a furnace
An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter D=1 mm, L= 2m, electrical resistivity rho=10^-6 ohms, thermal conductivity k=25W/mK, and emiss..
air is compressed in a variable-load piston-cylinder device equipped with a paddle wheel. initially air is at 500kpa
compute the required diameter for a solid circular shaft if it is transmitting a maximum of 110hp at a speed of 560
find the stresses in a point of a rod that is fixed to a wall and have a load in the edge or better known as a cantilever.
consider two concentric thin wall steel tubes the larger one closed at the bottom and the inner one open. the tubes are
water is pumped from a lower reservoir to a higher reservoir by a pump that provides 21 kw of shaft power. the free
tankless point-of-use water heaters are commercially available and are claimed to reduce energy usage since water is
The heat transfer convection coefficient between the wall and the fluid is 500 W/m2.K. Find the maximum temperature in wall.
1.consider a room 3 m x 3m x 3m with one faccedilade made of glazing with diffuse transmittance 0.6 and reflectance
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