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An Applied Guide to Process and Plant Design by Sean Moran

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Chapter 8

How to Do a Mass and Energy Balance

Professional engineers usually produce their mass and energy balances in MS Excel. My approach, as described in this chapter, allows these spreadsheets to be easily checked and readily modified, to allow the engineer to carry out sensitivity analysis for different scenarios across the design envelope.

Keywords

Static; dynamic; mass; energy; balance

Introduction

Most universities teach students to carry out mass and energy balances in single steady state scenarios in order to simplify the process for beginners. In the real world there is, however, no such thing as steady state.

Real plants are dynamic, with variable flows, compositions, temperatures, pressures, and so on. They have to produce product(s) ...

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