Control of Volatile Organic Compounds Emissions from Manufacturing

Table E-14. PROCEDURES TO CALCULATE HEAT TRANSFER
AREA OF A CONDENSATION SYSTEM OF STYRENE IN AIR
-. . . . -
Heat exchanger configuration Try 8" shell with 17 1-inch o.d.,
16 gage, 8-feet long brass tubes
on 1-1/4" square pitcha
Source Identification Identify the polymer industry and
the vent from Chapters 2 and 5
Coolant temperature, TCS0F Tout-10, rounded to next lower
multiple of 5.
She11-side heat transfer Cal culate usi ng procedure in
Coefficient (ho), Bsu Chemical Engi neers ' Handbook,
hr-ft' - OF pp. 10-25 thru 10-28
(Reference 28)
Coolant Select chi1 led water at Tc 2 35OF;
for Tout 2 45°F; ethylene glycol-
water brine solutions at Tc >_ -40°F,
for Tout 2 -30°F; and Freon-12 or
or other di rect expansion coolants
Tube-si de Reynol d ' s Number (NRe) d (12 x r,, x p) i p
at Tc 5-40°F, for Tout - 3 0 0 ~ ~ ~
Tube-side heat transfer
Coefficient (h,), Bzu Calculate using appropriate equations
hr-ftc - "t. for forced connection in pipes.e
Coolant flow ( ) 1b/hrf 757.9 x p
Temperature change of coolant
(AT,), OF
Coolant flow (V,), gpmg 94.5
Clean overall heat transf 5 r
coefficient (Uc), Btu/ft -hr-"~~
-