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Physics, 22.06.2019 03:30
As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.
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Physics, 22.06.2019 23:30
Which system of units is used by only a small number of countries in the world, including the u.s.
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What is a possible explanation for a set of facts that can be tested by further investigations called
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Physics, 23.06.2019 08:10
Which of the following is most likely to be the best conductor of electricity? oxygen chlorine aluminum chromium
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When he has his yearly physiacl exam, his doctor charts a spike in physical and skeletal growth. wha...
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