Figure P12.100 shows a device for conditioning moist air entering at 58C, 1 atm, 90% relative humidity, and a volumetric flow rate of 60 m3 /min. The incoming air is first heated at essentially constant pressure to 248C. Superheated steam at 1 atm is then injected, bringing the moist air stream to 258C, 1 atm, and 45% relative humidity. Determine for steady-state operation (a) the rate of heat transfer to the air passing through the heating section, in kJ/min. (b) the mass flow rate of the injected steam, in kg/min. (c) If the injected steam expands through a valve from a saturated vapor condition at the valve inlet, determine the inlet pressure, in bar. Neglect kinetic and potential energy effects.
Figure P12.100 shows a device for conditioning moist air
Problem 12.100 Chapter 12
Fundamentals of Engineering Thermodynamics | 8th Edition
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