A Maximum Energy Recovery Heat Exchanger Network

$($

MER HEN

$)$

$,$

$$using the Pinch

Design method, is to be designed for this chemical process using a minimum

approach temperature

$($

$\backslash$

Delta TMIN

$)$

$$of

$2$

$0$

$\backslash$

deg C

$.$

$$The MER HEN is to be designed in three

parts

$($

above the utility pinch, above the process pinch, and below the process

pinch

$)$

$.$

$$There are three utilities available to provide additional process heating and

cooling

$($

Table

$1$

$.$

$2$

$)$

$.$

$$The specific heat capacity of the hot oil is

$1$

$.$

$5$

$$kJ kg

$$

$1$

$$K

$$

$1$

$.$

$$The

final developed MER HEN and its component parts

$($

above the utility pinch, above

the process pinch, and below the process pinch

$)$

$$are required to be validated and

tested for feasibility, by comparing their features with targeted values.

Task

$1$

$($

Group Task

$$

$4$

$0$

$$marks

$)$

Using a minimum approach temperature

$($

$\backslash$

Delta TMIN

$)$

$$of

$2$

$0$

$\backslash$

deg C

$,$

$$determine the overall hot

utility requirement

$($

QHmin

$)$

$,$

$$overall cold utility requirement

$($

QCmin

$)$

$,$

$$and overall heat

recovery

$($

QREC

$)$

$$for the chemical process given in Table

$1$

$.$

$1$

$.$

$$These results should be

supported by the appropriate graphical and tabular information. In addition, and

making use of the utilities that are available for additional heating and cooling

$($

Table

$1$

$.$

$2$

$)$

$,$

$$determine the duty of the hot oil to be provided

$($

kW

$)$

$,$

$$the MP steam

$($

kW

$)$

$,$

$$and

the cooling water

$($

kW

$)$

$.$

$$The use of two hot utilities

$($

hot oil and MP steam

$)$

$$produces

a utility pinch at shifted temperature of

$2$

$3$

$1$

$\backslash$

deg C

$.$

$$Your results need to confirm this utility

pinch shifted temperature value.

$($

Note that MP steam will be used in preference to

hot oil due to its lower cost of supply

$)$

$.$

Task

$2$

$($

Individual Task

$$

$$Member

$1$

$$

$3$

$0$

$$marks

$)$

Produce a feasible, validated Maximum Energy Recovery Heat Exchanger Network

$($

MER HEN

$)$

$$for the Above Utility Pinch Design region using the Pinch Design

method for the chemical process

$($

Table

$1$

$.$

$1$

$)$

$,$

$$using a minimum approach

temperature

$($

$\backslash$

Delta TMIN

$)$

$$of

$2$

$0$

$\backslash$

deg C

$.$

$$In this design region you should be using only hot oil as

a utility.

The report should contain all the information required to demonstrate the Maximum

Energy Recovery Heat Exchanger Network

$($

MER HEN

$)$

$$for this design region using

is feasible and validated. The report should contain a table of all of the heat

exchangers used in this design region which includes the hot stream entry and exit

temperatures, the cold stream entry and exit temperatures, and the duty of the heat

exchangers.Introduction

Stream data for a chemical process are given in Table $1\mathrm{.}1.$

Table $1\mathrm{.}1$ Stream data

A Maximum Energy Recovery Heat Exchanger Network $($MER HEN$),$ using the Pinch

Design method, is to be designed for this chemical process using a minimum

approach temperature $(T_{MN})$ of $20C.$ The MER HEN is to be designed in three

parts $($above the utility pinch, above the process pinch, and below the process

pinch$).$ There are three utilities available to provide additional process heating and

cooling $($Table $1\mathrm{.}2).$ The specific heat capacity of the hot oil is $1\mathrm{.}5kJk{g}^{-1}{K}^{-1}.$ The

final developed MER HEN and its component parts $($above the utility pinch, above

the process pinch, and below the process pinch$)$ are required to be validated and

tested for feasibility, by comparing their features with targeted values.

Table $1\mathrm{.}2$ Utility data

Task $1($Group Task $-40$ marks$)$

Using a minimum approach temperature $(T_{\text{M}\text{I}\text{N}})$ of $20C,$ determine the overall hot

utility requirement $(\{$:$Q_H(min)),$ overall cold utility requirement $(Q_c(min)),$ and overall heat

recovery $(Q_{\text{A}\text{E}\text{C}})$ for the chemical process given in Table $1\mathrm{.}1.$ These results should be

supported by the appropriate graphical and tabular information. In addition, and

making use of the utilities that are available for additional heating and cooling $($Table

$1\mathrm{.}2),$ determine the duty of the hot oil to be provided $($kW$),$ the MP steam $($kW$),$ and

the cooling water $($kW$).$ The use of two hot utilities $($hot oil and MP steam$)$ produces

a utility pinch at shifted temperature of $231C.$ Your results need to confirm this utility

pinch shifted temperature value. $($Note that MP steam will be used in preference to

hot oil due to its lower cost of supply$).$

Task $2($Individual Task $-$ Member $1-30$ marks$)$

Produce a feasible, validated Maximum Energy Recovery Heat Exchanger Network

$($MER HEN$)$ for the Above Utility Pinch Design region using the Pinch Design

method for the chemical process $($Table $1\mathrm{.}1),$ using a minimum approach

temperature $(T_{\text{M}\text{i}\text{N}})$ of $20C.$ In this design region you should be using only hot oil as

a uti