$($a$)$ The problem table cascade for a process is given in Table Q$2($a$),$ with a minimum

temperature difference $(T_{\text{m}\text{i}\text{n}})$ of $10C.$

Table Q$2($a$)$: Problem table cascade.

i$.$ Construct a grand composite curve based on the given problem table cascade as

shown in Table Q$2($a$).$

$(5$ marks$)$

ii$.$ Based on the grand composite curve, determine how much steam $(kg*s^{-1})$ that can

be generated from the process at $120C,$ given that the enthalpy of the saturated

steam at $120C$ is $2202\mathrm{.}2kJk{g}^{-1}($assume sensible heat of water is negligible$).$

$(10$ marks$)$

iii. Hot utility is provided by a hot oil circuit with supply and return temperatures of

$400C$ and $380C$ respectively, with its heat capacity $(C_P)$ of $0\mathrm{.}201MJ*k{g}^{-1}.C^{-1}.$

Calculate the minimum flowrate of the required hot oil.

$(10$ marks$)$

$($b$)$ Table Q$2($b$)$ shows the stream data for a process that needs to undergo heat integration

study. Assume, temperature $(T_{\text{m}\text{i}\text{n}})$ of $10C.$

i$.$ Determine the pinch point and maximum energy recovery

$(10$ marks$)$

ii$.$ By using grid diagram, develop TWO alternative Heat Exchanger Network designs

for maximum energy recovery.

$(15$ marks$)$

Table Q$2($b$)$ : Stream data for a process