HE $355$ Problem Set # $3$ Due: February $3,2022$ @ $12$:$35$ pm $|$ Topic: Controllers & Equipment Sizing $$ Pipes and Circuits It is required to design and simulate $($rate$)$ a new piping run to provide boiler feed water $($BFW$)$ to a waste heat boiler $($WHB$)$ in a process unit. The set up for this problem is shown in Figure $1$ below. Figure $1$: Process Diagram for Waste Heat Boiler Problem The deaerator $($feed$)$ tank contains saturated liquid water at $105\backslash$deg C and the water level in the tank is $10$ ft above the pump inlet nozzle. The suction line $($i$.$e$.,$ feed line to pump$)$ comprises of $55$ ft of equivalent length of NPS $6$ Sch $40$ carbon steel pipe. The total equivalent length of pipe on the discharge side of the pump is $650$ ft of Sch $40$ NPS $4$ pipe. The design flowrate of BFW is $82,000$ kg$/$h$.$ The waste heat boiler will operate at $6\mathrm{.}5$ bar pressure and produce saturated steam at that temperature and the liquid level in the WHB will be $9$ ft above ground. In analogy to the pumps and circuits flowsheet used in class, please set up the flow circuit in CHEMCAD for the WHB problem $($shown in Fig. $1)$ using the following design parameters: $$ Use SRK for both the VLE and H thermo options $$ The pump is operated at a single speed of $3600$ RPM$.$ The performance curve for this operation is given as follows: Flow $($m$3/$h$)$ Efficiency $?$Ppump $($bar$)00\mathrm{.}619\mathrm{.}68210\mathrm{.}669\mathrm{.}68430\mathrm{.}719\mathrm{.}67640\mathrm{.}769\mathrm{.}57850\mathrm{.}818\mathrm{.}801050\mathrm{.}755\mathrm{.}371160\mathrm{.}711\mathrm{.}181190\mathrm{.}610\mathrm{.}02$ The pipe between pump and control valve is elevated to reach the height of WHB liquid level $2$ ft Created in Master PDF Editor $$ The control valve should be designed to be $60\%$ open $($valve position$)$ at the normal operating flow $(82,000$ kg$/$h of BFW$)$ The pressure in the exchanger shell should be regulated at $6\mathrm{.}5$ bar to allow the generated steam enough pressure to overcome frictional losses in the discharge piping leading to the lps header $($which operates at $6$ bar$)$ You should also model the pressure drop across the heat exchanger for the shell side as a length of $($NPS $4$ Sch $40)$ pipe that gives a $?$P $=0\mathrm{.}35$ bar at design flow $(82,000$ kg$/$h$).($a$)$ Report the flowsheet simulation set up in CHEMCAD.

Figure $1$: Process Diagram for Waste Heat Boiler Problem