method to design air cooled condenser

[abbasi]

Hi there

sometime back i asked u people to tell me the way 2 design air cooled condenser . reply was not encouraging let me tell u how we design it

below is data given in MBH/sq.ft multiply it with Heat rejection ratio factor and multiply by face area u select.

u will get the capacity of coil.


note...all these data are experimental and are valuable in many ways as we do all designing based on it



if data below isnot clear then see the attachment


TOTAL HEAT REJECTION MBH/FT²

Following data is based on

Entering air temperature= 95°F
Condensing temperature= 125°F

Copper tube 3/8” Aluminum fins with plane tubes

2 ROW CONDENSER COIL PERFORMANCES

AIR VELOCITY @ COIL FPM
FPI 300 400 500 600 700
12 5.0 5.54 6.21 6.84 7.5
14 5.6 6.0 6.82 7.49 8.09
16 6.5 6.8 7.42 8.15 8.50

3 ROW CONDENSER COIL PERFORMANCES

AIR VELOCITY @ COIL FPM
FPI 300 400 500 600 700
12 6.6 7.5 8.5 9.4 10.12
14 7.5 8.0 8.93 9.86 10.90
16 8.2 8.6 9.36 10.32 11.68

4 ROW CONDENSER COIL PERFORMANCES

AIR VELOCITY @ COIL FPM
FPI 300 400 500 600 700
12 7.5 8.52 9.95 11.12 12.16
14 8.0 9.4 10.54 11.9 12.90
16 8.5 9.10 11.13 12.67 13.64