Chilled Beam Design Guide - TROX

Net Sensible Heating Capacity, BTUH/LF
PRIMARY AIR COOLING NET SENSIBLE HEATING
WATERSIDE HEATING
Heating Performance (4-Pipe) DID301
450 Chart is based on 6 ft. DID301-US-4 (4
pipe) heating with a 20˚F temperature
differential between room and primary air
and an 50˚F temperature differential
400 between room and entering hot water.
For other beam lengths, see the
correction factors table below.
350
GPM HWS
300
250
200
150
GPM HWS
0.3
1.5
1.0
GPM HWS
1.5
1.0
0.8
0.5
0.8
0.5
0.3
1.5
1.0
0.8
0.5
100
0.3
50
0
-50
-150
-200
NC 15 20 25 30 33
0.3" 0.3" 0.4" 0.6" 0.8" 1.0"
"A" NOZZLES
-250
NC 15
0.2"
20
0.3"
25
0.4"
30
0.5" 0.6"
35
37
0.8" 1.0"
"B" NOZZLES
"C" NOZZLES
NC
25 30 35 39
0.3" 0.4" 0.5"
0.6" 0.7" 0.8" 0.9" 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 14.0
Primary Airflow Rate, CFM/LF
Corrections for Other DID301-US-4 Lengths & T ENTERING WATER - T INDUCED AIR
Performance Parameter
Water Side Heating (BTUH/LF)
Max. Recommended GPM (DID301-US-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 No Correction +1
+2
Multiply by 1.02 No Correction Multiply by 0.98 Multiply by 0.97
Hot Water Pressure Loss See Figure 39 44
T ENTERING HOT WATER - T INDUCED AIR
See table 7 (page 38)
Figure 61: 56: Heating (4 Pipe) Performance, DID301-US-4
60