4

Question 1

Shell and tube heat exchangers

Answer 1

Tube side: process stream
Shell side: cooling (utility stream)

Question 2

Simple end point HX model assumption

Answer 2

No phase change , constant U and constant Cp

Question 3

Simple weight HX model assumption

Answer 3

There is phase change

Question 4

Heat exchanger specs

Answer 4

Heat balance on specs tab of HX must be 0, minimum T difference between hot and cold streams common spec

Question 5

What is balance operation

Answer 5

Allows you to create a copy of a stream with the same flow rates/ composition without fixing vapour fraction/temperature/ pressure . Remember when dragging this out go to parameters tab salary component mole flow . IE USED FOR HMB

Question 6

Adjust operation

Answer 6

Used to manipulate one variable to meet a required value of another variable (dv) IE used to meet flowsheet/design specifications

Question 7

Issue to model assumption of separators

Answer 7

Does not reflect real life plant conditions. If liquid in vapour phase, compressor damages. If vapour in liquid stream, pump cavitation

Question 8

Pump characersitc curves

Answer 8

Allows to calculate outlet pressure and efficiency based on set compressor speed
Or efficiency and compressor speed based on set outlet pressure