Problem Based Learning Task:

Imagine you working as R&D Engineer at AirPure ${?}^{}$ Corporation. The CEO called a design task, which

wanted you to design special fragrance air freshener device for this coming Christmas holiday. Given

to you the basic design requirement of your air freshener device.

Inside your manufacturing factory, there are $3$ different types of chemicals that are used as

main ingredients for your special fragrance, which are stated in table below,

By assuming the device must have fragrance cylinder in gel form with constant density of $7$

$\frac{g}{c}{m}^3$ and by taking average surrounding air flow of $2\mathrm{.}7\frac{m}{s}$ at $25C,$

Design THE MOST FEASIBLE FRAGRANCE DEVICE that you can choose from $3$ different

chemicals that are available in for your company.

Your answer should consist of:

a$)$ Schematic diagram of your device system and its boundary space

b$)$ List of assumptions made for simplified your mass transfer equation

c$)$ Related mass transfer theory

d$)$ List of equations to be used

e$)$ Chosen chemical substance and its justification based on mass transfer fundamental $($includes

all calculation that you done to determine feasible chemical to be use$)-$

f$)$ Final design and your summary of findings

g$)$ List of reference $($website$,$ paper, etc$)$ used in this PBL task.