Chilled Beam Design Guide - TROX

PRIMARY AIR COOLING
Net Sensible Heating Capacity, BTUH/LF
WATER SIDE HEATING
NET SENSIBLE HEATING
Heating Performance (4-Pipe) DID622
1000
900
800
Chart is based on 6 ft. DID622-US-4 or
DID622-HC-4 (4 pipe) heating with a 20˚F
temperature differential between room
and primary air and an 50˚F temperature
differential between room and entering
hot water. For other beam lengths, see
the correction factors table below.
GPMHWS
700
GPMHWS
1.5
1.0
600
1.5
0.8
500
400
1.0
0.8
0.6
0.6
0.4
300
0.4
0.3
0.3
200
0.2
100
0.2
0
-100
-200
-300
NC
15 20 25 27
-400
0.2" 0.3" 0.4" 0.6" 0.8" 1.0"
"M" NOZZLES
-500
"G" NOZZLES
NC
15
20
25 30 35 37
0.2"
0.3" 0.4" 0.5" 0.6" 0.7" 0.8" 0.9"
1.0"
2.0
4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0
Primary Airflow Rate, CFM/LF
Corrections for Other DID622-US-4 or DID622-HC-4 Lengths & T ENTERING WATER - T INDUCED AIR
Performance Parameter
Water Side Heating (BTUH/LF)
Max. Recommended GPM (DID622-US-4 models)
Max. Recommended GPM (DID622-HC-4 models)
Noise Level (NC)
Primary Air Pressure Drop
Beam Length (Nominal Length in Feet)
4 Feet 6 Feet 8 Feet
10 Feet
Multiply by 1.03 No Correction Multiply by 0.96 Multiply by 0.92
1.5 1.5 1.5
1.5
1.5 1.5 1.5
1.5
-5 No Correction +3
+6
Multiply by 1.02 No Correction Multiply by 0.98 Multiply by 0.97
Hot Water Pressure Loss See Figure 41 36
TENTERING HOT WATER - TINDUCED AIR
See Table 7 (page 38)
Figure 56: 51: Heating (4 Pipe) Performance, DID622-US-4 and DID622-HC-4
55