A hygrometer, which measures the amount of moisture in a gas stream, is to be calibrated
Chapter 2, Problem 2.40(choose chapter or problem)
A hygrometer, which measures the amount of moisture in a gas stream, is to be calibrated using the apparatus shown here: 38 CHAPTER 2 Introduction to Engineering Calculations WEBC02 06/05/2015 0:5:11 Page 39 DRYER EVAPORATOR HYGROMETER Steam ROTAMETERS Air Water Steam and dry air are fed at known flow rates and mixed to form a gas stream with a known water content, and the hygrometer reading is recorded; the flow rate of either the water or the air is changed to produce a stream with a different water content and the new reading is recorded, and so on. The following data are taken: Mass Fraction of Water, y Hygrometer Reading, R 0.011 5 0.044 20 0.083 40 0.126 60 0.170 80 (a) Draw a calibration curve and determine an equation for yR. (b) Suppose a sample of a stack gas is inserted in the sample chamber of the hygrometer and a reading of R 43 is obtained. If the mass flow rate of the stack gas is 1200 kg/h, what is the mass flow rate of water vapor in the gas?
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