Unformatted text preview: out should both increase as T increases. 2. A vortex tube design with no supplied power or moving parts proposes to separate inlet air (10.0 bar, 25 C) into a stream of cold air (-10 C, 1.0 atm) and warm air (30 C, 1.0 atm). The warm air stream has a mass flowrate 5 times that of the cold air stream. Assume ideal gas operation, but do not assume that C p is constant. (a) Under which operating conditions (T ) can this design operate without violating the 2 nd Law of Thermodynamics? Hint: should be feasible at all T. (b) You should have found that the proposed design is economically feasible at all operating conditions. If the cold temperature is set at 10K and the operating temperature (T ) is fixed at 300K, what is the maximum possible hot temperature for a thermodynamically feasible design?...
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- Fall '13
- Thermodynamics, 300K, entropy generation rate, 10.0 bar