Chilled Beam Design Guide - TROX

PRIMARY AIR COOLING
Sensible Cooling Capacity, BTUH/LF
TOTAL SENSIBLE COOLING
SECONDARY (WATER) COOLING
Cooling Performance (4-Pipe) DID621
1120
1040
960
880
Chart is based on 6 ft. DID621-HC-4 (4
pipe) cooling with a 20˚F temperature
differential between room and primary air
and an 18˚F temperature differential
between room and entering chilled water.
For other beam lengths, see the
correction factors table below.
Performance at water flow rates > 1.5
GPM is only achievable with DID621-HC
models.
GPMCWS
800
720
640
3.0
2.5
2.0
GPMCWS
1.5
560
1.0
0.6
480
400
3.0
2.0
1.5
1.0
0.6
0.4
0.3
0.2
320
0.4
0.3
240
0.2
160
"G" NOZZLES
80
NC
15
20
25 30 35 37
0
NC
0.2" 0.3" 0.4" 0.5" 0.6" 0.7" 0.8" 0.9"
15 20 25 27
0.2" 0.3" 0.4" 0.6" 0.8" 1.0"
"M" NOZZLES
1.0"
1.0
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0
Primary Airflow Rate, CFM/LF
Corrections for Other DID621-US-4 or DID621-HC-4 Lengths & T INDUCED AIR - T ENTERING
WATER
Performance Parameter
Beam Length (Nominal Length in Feet)
4 feet 6 feet 8 feet
10 feet
Sensible Cooling (BTUH/LF)
Max. Recommended GPM (DID621-US-4 models)
Max. Recommended GPM (DID621-HC-4 models)
Noise Level (NC)
Primary Air Pressure Drop
Chilled Water Pressure Loss
Multiply by 1.02 No Correction Multiply by 0.98 Multiply by 0.90
1.5 1.35 1.2
1.1
3.0 2.65 2.35
2.1
-5 No Correction +3
+6
Multiply by 1.03 No Correction Multiply by .98 Multiply by .97
See Figure 38 33 (DID621-US-4) or Figure 40 35 (DID621-HC-4)
TINDUCED AIR - TENTERING CHILLED WATER See Table 6 (page 38)
Figure 48: 53: Cooling (4 Pipe) Performance, DID621-US-4 and DID621-HC-4
52