Consider an enclosed swimming pool. The pool area has a sensible heat loss of

$424,000Bt\frac{u}{h}$ and a latent heat gain of $530,000Bt\frac{u}{h}$ on a design day when the outdoor

air is at $35$ F and $20\%RH.$ The space is to be maintained at $75$ F and $50\%RH.$ Outdoor

air is heated to $60$F$,$ mixed with recirculated air from the conditioned space and the

mixed air heated to supply conditions. Draw the diagram of the HVAC system

Questions $-$

$($a$)$ At what rate in cfm$,$ is the air supplied to the space if the supply air temperature is

$95$ F$?-($ANSW $-20,714$ cfm$)$

$($b$)$ At what rate, in cfm$,$ is outdoor air flowing if recirculated air is $6,646$ cfm$?-$

$($ANSW $-12,922$ cfm$)$

$($c$)$ What is the heat transfer rate for the preheat process? $-($ANSW $-355,098$ Btu$/$h$)$

$($d$)$ What is the heat transfer for the mixed air heating process? $-($ANSW $-635,998$

Btu$/$h$)$