Question $3(40\backslash \%)$

Assume that the first option using water$-$cooled chillers and cooling towers in Question $2$ is chosen. Develop a draft schematic line diagram including the chilled water and condenser water circuits. The chilled water circuit shall adopt a variable flow differential pressure bypass system with reverse return chilled water piping system. The condenser water circuit shall also adopt a variable flow system too.

For the chilled water system, determine:

i$)$ The chilled water flow rate $($in $\backslash (\backslash$mathrm$\{$L$\}/\backslash$mathrm$\{$s$\}\backslash ))$ at design load.

For the condenser water system, determine:

ii$)$ The amount of heat rejection $($in kW $)$ at design load.

iii$)$ The condenser water flow rate $($in $\backslash (\backslash$mathrm$\{$L$\}/\backslash$mathrm$\{$s$\}\backslash )).$

iv$)$ The water cooling tower coefficient $($make your own assumption of the cooling air flowrate$)$

You may consider your own number of chillers, pumps and cooling towers based on the selected $350$ TR chiller and $900$ TR cooling load.

Assume the system configuration as follows:

$-\backslash (\backslash$quad $\backslash )$ The building is measured from $\backslash (\backslash$mathrm$\{$G$\}/\backslash$mathrm$\{$F$\},1/\backslash$mathrm$\{$F$\}\backslash )$ to $\backslash (15/\backslash$mathrm$\{$F$\}\backslash )($floor height $\backslash (=4\backslash$mathrm$\{$~m$\}\backslash )).$ There is a basement $\backslash (($B $/$ F$)\backslash )$ with a height of $\backslash (4\mathrm{.}5\backslash$mathrm$\{$~m$\}.\backslash$quad R $/$ F $\backslash )$ is an open roof.

$-$ Chillers, chilled water pumps, condenser water pumps are installed at the basement of the building inside the central chiller plant room.

$-$ Cooling towers are installed on the roof of the building.

$-\backslash (\backslash$quad $\backslash )$ Each floor $\backslash ((\backslash$mathrm$\{$G$\}/\backslash$mathrm$\{$F$\},1/\backslash$mathrm$\{$F$\}\backslash )$ to $\backslash (15/\backslash$mathrm$\{$F$\}\backslash ))$ is equipped with $2$ AHUs and $1$ PAU $($for the purpose of presenting them in the schematic line diagram$).$

Attach with your answer the charts and$/$or diagrams that you have used in the calculation. State any engineering assumptions taken.

Grades will be given for each answered question for this assignment. The conversion of grades to marks is based on the following mapping table. Sub$-$grades like A$+,$ A$-$ will be given at an addition $/$ subtraction of $3$ marks respectively. The overall mark is calculated based on the weighing of each question.