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A steel bottle V = 0.1 m3 contains R-134a at 20°C, 200 kPa. It is placed in a deep freezer where it is cooled to -20°C. The deep freezer sits in a room with ambient temperature of 20°C and has an inside temperature of -20°C. Find the amount of energy the freezer must remove from the R-134a and the extra amount of work input to the freezer to do the process.
Sketch a preliminary layout for the following heat exchanger systems. On the layout sketch indicate pipe work manifolds, access platforms, access for construction, operations and maintenance.
a fairing for an optically perfect window for an airborne telescope is being tested in a wind tunnel. a manometer is
a piston-cylinder device maintained at a constant pressure of 0.1mpa contains nitrogen gas. it is cooled from
Moist air at 45?C and relative humidity 30% (State 1) with another stream of moist air at 20?C and relative humidity 50% (State 2) in an adiabatic duct. Mass flow rate of dry air is 0.8 kg/s at section 1 and 1 kg/s at section 2. The mixed stream (Sta..
One side of a copper block 5 cm thick is maintained at 250*C. The other side is covered with a layer of fiberglass 2.5 cm thick. the outside of the fiberglass is maintained at 35*C, & the total heat flow through the copper-fiberglass combination is 5..
For the composite bar of Prob. 2.111, determine the residual stresses in the tempered-steel bars if P is gradually increased from zero to 98 kips and then decreased back to zero.
Determine the force in each member of the loaded truss. The forces are positive if in tension and negative if in compression. Discuss the effects of varying the angle of the 52 degree support surface at C.
The overall heat transfer coefficient based on the gas-side surface area is Uh 100 W/m2 · K. Determine the required gas-side surface area Ah using the NTU method.
how do you determine the thickness of a tapering barrel of a gun at the largest end using pressure temperature on the
how much heat in kj must be added to 2 kg of steam initially at t1 300oc contained within a rigid volume to increase
a mixture of methanol and methyl acetate contains 15.0wt methanol. using a single dimensional equation determine the
the following linear failure envelopes for a rock mass are givenintact rockfriction angle 350cohesion 900 psitension
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