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Ammonia is to be isothermally compressed in a specially designed flow turbine from 1 atm and 672 R to 50 atm. If the compression is done reversibly, compute the heat and work flows needed per lb-mole of ammonia by the following methods;
A. Assuming ideal gas behaviour
B. From the generalized compressibility factor and residual property charts
a steam power plant has high and low pressures of 20 mpa and 10 kpa respectively and one open fwh operating at 1 mpa
a desuperheater is a steady-flow adiabatic mixing process that mixes superheated water vapor with colder liquid water
A piston-cylinder device with a set of stops initially contains 0.6kg of steam at 0.8MPa and 500°C. The location of the stops corresponds to 60percent of the initial volume. Now the steam is cooled. Determine the compression work of the final state ..
Calculate the delta velocity required to change the inclination of a circular orbit at 32,000 km altitude from a 28.5 degree inclination to an inclination of 45 degrees. Compute the propellant used if the satellite weighs 1200 lbs after the manoeuvre..
A small fan moves air at a mass flow rate of 0.004 lbm/s. Upstream of the fan the pipe diameter is 2.5 in., the flow is laminar, the velocity distribution is parabolic, and the kinetic energy coefficient 1, is equal to 2.0. Downstream of the fan, the..
some engineers have suggested that air compressed into tanks can be used to propel personal transportation vehicles.
consider a vertical piston-cylinder assembly with a 50 kg piston attached to a spring and exposed to atmospheric
One component in a household refrigerator is the compressor where refrigerant 12 enters as saturated vapor at -24?F and is isentropic ally compressed to 29 psia. Determine the work required in kJ/kg and the exit temperature (in °C) of the refrigeran..
there are two thermal reservoirs the hot reservoir is at 1200 k and the cold reservoir is at 600 k. if you wanted to
Design a flat roof meeting certain mechanical performance criteria. The basic structure of the roof is a series of rectangular-section 'joists', made from softwood, that span the space to be covered by the roof.
R-134a enters the condenser of a refrigerator at 800kPa and 50oC at a rate of 0.018kg/s and leaves at 800kPa as a saturated liquid. It is known that the compressor consumes 1.2kW of electricity at this operating condition. Determine 1) heat rejection..
a spherical copper shell of inside radius 5cm and wall thickness 1cm loses heat to the surrounding air which is
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