Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Sensible Cooling Capacity, BTUH/LF<br />
PRIMARY AIR COOLING SECONDARY (WATER) COOLING<br />
TOTAL SENSIBLE COOLING<br />
Cooling Performance (2-Pipe) DID302<br />
1500<br />
1400<br />
1300<br />
Chart is based on 6 ft. DID302-US-2 (2<br />
pipe) cooling with a 20˚F temperature<br />
differential between room and primary air<br />
and an 18˚F temperature differential<br />
between room and entering chilled water.<br />
For other beam lengths, see the<br />
correction factors table below.<br />
GPMCWS<br />
1200<br />
1100<br />
1.5<br />
1.0<br />
1000<br />
900<br />
GPMCWS<br />
0.8<br />
0.6<br />
0.4<br />
800<br />
1.5<br />
1.0<br />
0.3<br />
0.2<br />
GPMCWS<br />
700<br />
0.8<br />
0.6<br />
600<br />
1.5<br />
1.0<br />
0.4<br />
0.3<br />
500<br />
0.8<br />
0.6<br />
0.2<br />
0.4<br />
400<br />
0.3<br />
0.2<br />
300<br />
"C" NOZZLES<br />
200<br />
NC<br />
0.2"<br />
20<br />
25 30 35 39<br />
0.3" 0.4" 0.5" 0.6" 0.7" 0.8" 0.9" 1.0"<br />
100<br />
NC 15<br />
0.2"<br />
20<br />
0.3"<br />
25<br />
0.4"<br />
30<br />
0.5" 0.6"<br />
35<br />
37<br />
0.8" 1.0"<br />
"B" NOZZLES<br />
0<br />
NC 15 20 25 30 33<br />
0.3" 0.3" 0.4" 0.6" 0.8" 1.0"<br />
"A" NOZZLES<br />
4.0<br />
6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0<br />
Primary Airflow Rate, CFM/LF<br />
30.0<br />
Corrections for Other DID302-US-2 Lengths & T INDUCED AIR - T ENTERING WATER<br />
Performance Parameter<br />
Sensible Cooling (BTUH/LF)<br />
Max. Recommended GPM (DID302-US-2 models)<br />
Noise Level (NC)<br />
Primary Air Pressure Drop<br />
<strong>Beam</strong> Length (Nominal Length in Feet)<br />
4 Feet 6 Feet 8 Feet<br />
10 Feet<br />
Multiply by 1.02 No Correction Multiply by 0.97 Multiply by 0.95<br />
1.35 1.15 1.0<br />
0.9<br />
-1 No Correction +1<br />
+2<br />
Multiply by 0.74 No Correction Multiply by 1.03 Multiply by 1.07<br />
<strong>Chilled</strong> Water Pressure Loss See Figure 37 42<br />
TINDUCED AIR - TENTERING CHILLED WATER<br />
See table 6 (page 38)<br />
Figure 58: 53: Cooling (2 Pipe) Performance, DID302-US-2<br />
57