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Consider an ideal combined cycle with compression ratio of 7:1 in which air enters the compressor at 295 K, enters the turbine at 1200 K, and exits the heat exchanger at 400 K. In the steam cycle, steam in compressed to 8 MPa, heated to 400 °C in the heat exchanger, and then condensed at a pressure of 10kPa. Calculate the theoretical efficiency of this cycle, and compare to the differences of the two cycles separately.
a vapor-compression refregeration i.e. reverse rankine system circulates refrigerant 134a at a rate of 6kgmin. the
it is proposed that solar energy be used to warm a large collector plate. this energy would in turn be transferred as
determine the magitudes of the horizontal and vertical reactions of the chair on the man at the instant . At this instant he has a speed of 6 m/s, which is increasing at 0.5 m/s^2.
a ball of mass m is connected to a string of length l and orbiting in a vertical circle at speed v.a write an
a cross section of a rotating bearing is shown. the spherical member rotates with angular speed omega a small distance
air flows parallel to an isothermal 100c flat plate with a free stream velocity of 10ms and free stream temperature of
a catheter is a specialised needle intended for long-term insertion into a vein in a patients arm. engineers are
draw a schematic of band structure of a compound that has s and p orbitals occupied. show where is the fermi energy and
A block of metal has a 90 notch cut from its lower surface. The notched part rests on a circular cylinder of diameter 2.0 cm, as shown in Fig. 4.15. If the lower surface of the par is 1.3 cm above the base plane, how deep is the notch?
bananas are to be cooled from 24degc to 13degc at a rate of 215 kgh by a refrigeration system. the power input to the
for your sink at home the flow rate in is 5000 unitshr. accumulation is 2500 units. what is the accumulation rate if
using excel find the value of the 95 confidence interval for a single-sample using the z variable and the students
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