Answers: 1
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.
Answers: 3
Physics, 22.06.2019 14:00
The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?
Answers: 2
Physics, 22.06.2019 17:30
Does heating a metal wire increase or decrease its electrical resistance? why?
Answers: 1
Physics, 23.06.2019 05:10
An object is placed in front of a concave mirror between the pole and the focus of the mirror, what is the nature of the image formed by the mirror
Answers: 2
If you hold a permanent magnet the wrong way in an extremely strong magnetic f eld, its magnetizatio...
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Health, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Biology, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
English, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Physics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Social Studies, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01
Mathematics, 12.09.2020 01:01