Question $2$

$($a$)$ A small factory with a $3$ m height ceiling is shown. The air change for office and shop are $0\mathrm{.}5$ and $1\mathrm{.}5$ air change per hour respectively. On a winter day when the outside temperature is $-8C,$ saturated, the office is maintained at $24C,35\%RH,$ and the shop is kept at $18C,50\%RH.$ The Determine for each

$($i$)$ Infiltration

$(4$ Marks$)$

ENGG S$206$F $(2304)$

Page $2$ of $7$

$($ii$)$ The sensible and latent heat gain in office and shop due to the infiltration, respectively.

$(8$ marks$)$

$($b$)$ Proposed on the designed humidity conditions to prevent static electricity.

$(3$ Marks$)$

$($c$)$ Suggest the advantages of modified bin method.

$(3$ Marks$)$

$($d$)$ Comment on why mechanical ventilation is better control of the exact amounts of air entering and leaving the building.

$(2$ Marks$)$