Air Flow Rate Determination For Fans With Overhung Impeller; Connection Of Individual Sections - Complementary Set Xpsssxxdr - Remak AERO MASTER XP Series Installation And Operating Instructions Manual

Air Flow Rate Determination for Fans with Overhung Impeller

After installing and commissioning the equipment air flow may be checked or possibly adjusted using simple method for measuring at diffuser. This
method eliminates to some extent errors in results determined by speed measurements in a wind tunnel, which are caused mainly by turbulent and
non-linear air flow. For the diagram of the measurement determination of the difference in the static pressures in front of the inlet fan diffuser and
in the fan diffuser, refer to figure # 1 (2).
Figure 1
Figure 2
Connection of individual sections – complementary set XPSSSxxDR
If the installation does not allow disassembly of the side panels on the non-serviceable side, it is possible to order a complementary connecting
set, XPSSSxxDR (internal). When ordering this set, it is necessary to specify its type XPSSSxxDR (xx - specifies size of XP product) and number of
conections, e.g. XPSSS06DR - 2 pcs.
The connecting set is installed on the inner side of the vertical profiles of the XP connecting frame.
If ordered, the complementary assembly set will be installed in the factory in the corresponding sections on the vertical profiles of the connecting
set XPSSSxxMR.
Figure 1
Side panel
Air Handling units AeroMaster XP
Impeller k
type factor
RH 25 C 60
RH 28 C 75
RH 31 C 95
RH 35 C 121
RH 40 C 154
RH 45 C 197
RH 50 C 262
RH 56 C 308
RH 63 C 381
RH 71 C 490
qv – air flow rate
k – fan factor (provided
ρ
by the fan
&
= V 20 ⋅ k
manufacturer)
ρ
op
Δpw – static pressure
difference (measured
value)
ρ
op
– air density
at operating
temperature
The (fan) air flow rate can be calculated according to the following
relationship:
If the fan is operated at temperatures higher than 20°C, the air
flow rate will be calculated using the following relationship:
Figure 2
Connection set Connecting
XPSSSxxDR frame profile
Impeller type k
factor
ADH-E_0160 137
ADH-E_0180 178
ADH-E_0200 203
ADH-E_0225 246
ADH-E_0250 282
ADH-E_0280 353
ADH-E_0315 441
ADH-E_0355 504
ADH-E_0400 684
ADH-E_0450 811
ADH-E_0500 1090
ADH-E_0560 1283
ADH 630 1568
⋅ Δ p
.
ADH 710 1776
20 w
ADH 800 2443
ADH 900 2939
ADH 1000 4182
. . . . .
V = k √Δ √Δ √Δ √Δ √Δ p
.
ρ
&
= V 20 ⋅ k ⋅
20
ρ
op
ρ
op
Figure 3
Fixing screw M6
Riveting matrix
Connecting screw M8
Impeller type k
factor
RDH-E_0180 112
RDH-E_0200 64.8
RDH-E_0225 86.2
RDH-E_0250 123
RDH-E_0280 157
RDH-E_0315 207
RDH-E_0355 277
RDH-E_0400 379
RDH-E_0450 505
RDH-E_0500 634
RDH-E_0560 875
RDH 630 1091
RDH 710 1306
RDH 800 1571
RDH 900 1904
RDH 1000 2542
RDH 1120 3367
RDH 1250 4193
RDH 1400 5260
w
Δ p
.
w
41