Chapter 7, Problem 7.22P

Interpretation Introduction

(a)

Interpretation:

The volumetric flowrate of the gas $\left(\frac{\text{L}}{\text{s}}\right)$ upstream of the heater $\text{at 30°C}\text{and 110kPa}$ needs to be determined.

Concept introduction:

The open-system energy balance equation is;

$\dot{Q}-{\dot{W}}_s=\Delta \dot{H}+\Delta {\dot{E}}_k+\Delta {\dot{E}}_p$

Here,

Interpretation Introduction

(b)

Interpretation:

Several assumptions made in the calculation for finding the volumetric flowrate of gas that could lead to errors in the calculated flowrate needs to be listed.

Concept introduction:

The volumetric flow rate can be calculated as the product of the cross sectional area $\left(\text{A}\right)$ for flow and the average flow velocity $\left(\text{v}\right)$. If area is measured in square meter and velocity in meters per second.