## Ar AT

Dp 1 V T 273 gt pJ pa SC 2 p 14.7 Consider, for example, the following Operating temperature 397 F Operating pressure 215 psia -78 x 100 - 5.2 percent error 1500 11.4 Heat-Flow Computations Example 2 As mentioned in Chapters 3 and 4, it is sometimes desirable to calculate heat flow, reflux rate, or boilup rate. Let us consider, for example, the heat exchanger of Figure 11.4. We wish to know the increase or decrease of enthalpy Heat flow computer for heat transfer Heat flow computer for heat...

## W

W We make no effort to cover all measurements and hardware here. We have selected, however, a number of items we think are important, or are worth emphasizing, or have not been covered adequately elsewhere. A glaring omission is that of flow metering. We are very suspicious of the accuracy of most inplant flow meters because only rarely do plants have facilities for their calibration, but we have nothing new or unique to offer for improvement. Considerable emphasis, on the other hand, has been...

## Devider 556 Fox Boro

And if the temperature difference is zero Equations 11.10 and 11.11a may now be solved to find This value of may be substituted into equations 11.12 and 11.13 to find 5 Example. Let us consider a case where the following conditions apply External reflux flow-meter span 0-50,000 pph Temperature transmitter spans 0-150 C cp 0.71 pcu lbm C T0 - T 100 C k 235 pcu lbm From equation 11.14 , 1.302, and from equation 11.18 , 5 1. As a check let p 0.348 x 12.22 from equation 11.2 11.3 Temperature and...