610 Indal Metals 5 HP Centrifugal Aeration Fan (1989)

610 Indal Metals 5 HP Centrifugal Aeration Fan (1989)
Alberta Farm Machinery
Research Centre
Printed: July 1989
Tested at: Lethbridge
ISSN 0383-3445
Group 1e
Evaluation Report
610
Indal Metals 5 HP Centrifugal Aeration Fan
A Co-operative Program Between
ALBERTA
FARM
MACHINERY
RESEARCH
CENTRE
PAMI
PRAIRIE AGRICULTURAL MACHINERY INSTITUTE
INDAL METALS 5 HP SINGLE PHASE 3450 RPM
CENTRIFUGAL FAN
MANUFACTURER AND DISTRIBUTOR:
Indal Metals
Division of Indal Limited
P.O. Box 3041
Saskatoon, Saskatchewan
S7K 3S9
RETAIL PRICE: $1295.00 (July 1989, f.o.b., Lethbridge, Alberta)
SUMMARY OF RESULTS
TABLE 1. Indal Metals 5 hp Single Phase 3450 RPM Centrifugal Fan Performance at
Typical Levels of Operation.
Static Pressure
Air Flow Rate
Input Power
Total Efficiency
in wg
(Pa)
cfm
(L/s)
kW
%
Fan Speed
rpm
0.51
1.00
2.00
3.00
4.60
5.00
6.00
7.00
8.00
9.00
9.98
(127)
(249)
(498)
(747)
(996)
(1250)
(1490)
(1740)
(1990)
(2240)
(2490)
4400
4310
4140
3986
3600
3420
3220
3010
2750
2440
1520
(2080)
(2030)
(1950)
(1880)
(1700)
(1610)
(1520)
(1420)
(1300)
(1150)
(718)
3.66
3.78
4.08
4.32
4.32
4.47
4.54
4.52
4.47
4.32
3.47
23
27
35
42
46
50
55
58
60
61
51
3517
3511
3499
3488
3484
3477
3474
3471
3471
3475
3518
FIGURE 1. Indal Metals 5 hp Centrifugal Fan: (1) Fan Housing, (2) Motor Control,
(3) Motor Mount.
RECOMMENDATIONS
It is recommended that the manufacturer consider:
1. Supplying fan performance data over a complete range of
static pressures.
2. Supplying detailed operating instructions containing
illustrations and information on general operation, installation,
maintenance, safety aspects and troubleshooting.
Station Manager: R. P. Atkins
Project Engineer: R. C. Maze
THE MANUFACTURER STATES THAT
With regard to recommendation number:
1. Fan performance data will be supplied with each fan.
2. A detailed operating and instruction manual will be supplied
with each fan.
GENERAL DESCRIPTION
The Indal Metals 5 hp 3450 rpm centrifugal fan is a 14.5 in
(368 mm) diameter, single speed, direct drive, centrifugal flow fan. It
is primarily used for grain aeration or grain drying systems.
The Indal Metals 5 hp centrifugal fan is equipped with a wire
mesh guard grill, an inlet bell, duct mounting flange, and motor control
switch. The steel impeller consists of a hub backplate, 9 backward
straight blades and a flange. The impeller is directly mounted on
the 5 hp (3.73 kW), single phase, 230 volt electric motor. The fan
housing, motor mounts, and supports are of steel construction with
a painted finish for corrosion protection.
FIGURE 1 shows the location of major components while
detailed specifications are given in APPENDIX 1.
SCOPE OF TEST
The Indal Metals 5 hp Centrifugal fan was tested in the outlet chamber setup (FIGURE 2) in accordance with test procedures
developed by the Prairie Agricultural Machinery Institute and adopted
by the Alberta Farm Machinery Research Centre. The intent was to
determine the performance of the fan in terms of air flow rate, static
pressure, input power and total efficiency.
Fan performance was determined at 230 V. The fan was also
evaluated for ease of operation, maintenance, operator safety and
suitability of the operator’s manual.
FIGURE 2. Schematic Fan Test Apparatus - Outlet Chamber Setup.
RESULTS AND DISCUSSION
All fan performance results in this report are given at standard
air1 conditions so that direct comparisons can be made with other
fan test reports. Fan performance under actual operating conditions
could differ from these results by up to 10%, depending on such
things as temperature, barometric pressure, humidity and elevation
above sea level.
Air Flow Rate: Fan output at typical levels of operation (i.e.
static pressure2) are given in TABLE 1. The air flow rate ranged
from 1520 cfm (718 L/s) at 9.98 in wg (2490 Pa) to 4400 cfm
(2080 L/s) at 0.511 in wg (127 Pa). FIGURE 3 illustrates the fan
performance curves for the Indal Metals 5 hp centrifugal fan. The
manufacturer did not provide any information on rated performance.
It is recommended that for fan selection purposes, the manufacturer
consider supplying a table or curve of air flow rates over a complete
range of static pressures.
Power Consumption: The power consumption numbers given
in TABLE 1 can be used to calculate the cost of operating the fan. To
calculate the cost of fan operation, multiply the power consumption
(kW) by the number of hours of fan operation times the cost per
kilowatt hour.
The power consumed by the fan depended upon the point of
operation of the fan. The power consumption varied from 3.47 kW
at maximum static pressure and minimum air flow to 4.54 kW at
6.0 in wg (1490 Pa) static pressure and an air flow rate of 3220 cfm
(1520 L/s). The maximum amperage drawn by the motor was
18.9 amps, which was less than the rated motor amperage of
19.5 amps.
Total Efficiency: Total efficiency is the ratio of air horsepower
over the input power. Air horsepower is dependent upon the air
flow rate and corresponding total pressure. For typical levels
of operation, the total efficiency (TABLE 1), ranged from 23 to
61%. The maximum total efficiency of 61% occurred at 2440 cfm
(1150 L/s) at a static pressure of 9 in wg (2240 Pa).
EASE OF OPERATION
Maintenance: No maintenance instructions were supplied.
1
Standard air is air with a density of 0.075 lbm/ft³ (1.2 kg/m³), 50% relative humidity and a
barometric pressure of 29.92 in Hg (101.325 kPa).
2
Static pressure is a measure of the pressure difference between the pressure inside
the building and the pressure on the outside of the building. Static pressure is usually
expressed in inches of water gauge (in wg) or Pascals (Pa).
Page
2
The inlet screen was easily removed which allowed for cleaning of
the wheel and fan housing. Regularly scheduled maintenance will
ensure longer motor life and optimum performance.
APPENDIX I
SPECIFICATIONS
MAKE:
MODEL:
SERIAL NUMBER:
MANUFACTURER:
Indal Metals
5 hp Centrifugal Aeration Fan
588001
Indal Metals - Division of Indal Ltd.
P.O. Box 3041
Saskatoon, Saskatchewan
S7K 3S9
OVERALL DIMENSIONS:
-- housing width
-- housing depth
-- housing height
-- inlet bell diameter
-- guard grill diameter
-- grill opening
25.5 in (648 mm)
26.5 in (673 mm)
31.5 in (800 mm)
10.3 in (260 mm)
13.0 in (330 mm)
0.13 in (3 mm) diameter wire spaced at 0.5 in
(13 mm)
9.25 in (235 mm) by 16.8 in (425 mm)
-- discharge opening
IMPELLER:
-- diameter
-- inside flange diameter
-- number of blades
-- blade angle
-- blade width
14.5 in (368 mm)
12.5 in (318 mm)
9
28°
3.5 in (89 mm)
WEIGHT:
215 lb (98 kg)
MOTOR NAMEPLATE DATA:
-- make
-- specifications
-- frame
-- class
-- series
-- design
-- code
-- rpm
-- service factor
-- ambient temperature rise
-- volts
-- amps
-- phase
-- cycles
-- horsepower
Baldor
36F500W957
184T
F
F588
L
F
3450
1.0
40° C
230 V
19.5 A
single
60 Hz
5 hp (3.73 kW)
FIGURE 3. Indal Metals 5 hp Fan Performance Curves.
OPERATOR SAFETY
The guard grill provided adequate protection from the fan
blades. The motor was a totally enclosed unit and presented no
safety hazards. The Indal Metals 5 hp, single phase, 230 volt fan
was CSA approved.
The noise level for the Indal Metals 5 hp Centrifugal fan, at
a distance of 4.9 ft (1.5 m) from the centre of the fan inlet, while
operating at a 1 in wg (249 Pa) static pressure, was 92 dB(A). Higher
noise levels could be expected if the fan was operated in the vicinity
of other buildings. The Indal Metals 5 hp Centrifugal fan falls within
range 4 of the Alberta Farm Machinery Research Centre noise level
range classification (APPENDIX II).
The noise level produced could damage hearing, depending on
exposure time. Ear protection is definitely recommended.
OPERATOR’S MANUAL
No operator’s manual was supplied. It is recommended
that the manufacturer consider supplying a detailed operator’s
manual containing information on maintenance, installation, rated
performance, safety aspects and trouble shooting.
Range
1
2
3
4
APPENDIX II
NOISE LEVEL RANGES
SOUND LEVEL
(dBA)
Comments
up to 45
Tolerable, low level background noise.
45 to 60
Dominating background noise that would interfere with
normal conversation.
60 to 85
Could be annoying and be detrimental to hearing and
operator performance under long-term continuous
exposure. Ear protection should be considered.
over 85
Could damage hearing, depending on level and
exposure time. Ear protection is definitely recommended.
SUMMARY CHART
INDAL METALS 5 HP CENTRIFUGAL AERATION FAN
RETAIL PRICE:
FAN DESCRIPTION:
FAN PERFORMANCE:
Air Flow Rate:
-range
-at maximum efficiency
Power Consumption:
Total Efficiency:
OPERATOR SAFETY:
OPERATOR’S MANUAL:
$1295.00 (July, 1989, f.o.b. Lethbridge)
14.5 in (368 mm) single speed, direct drive, 5 hp
(3.73 kW), single phase, 230 volt electric motor
1520 to 4400 cfm (718 to 2080 L/s)
2440 cfm (1150 L/s) at a 9 in wg (2240 Pa) static
pressure
3.47 to 4.54 kW
maximum 61%
guard grill provided, CSA approved motor noise level
= 92 dB(A) at 4.9 ft (1.5 m) from fan inlet
none supplied
Prairie Agricultural Machinery Institute
Head Office: P.O. Box 1900, Humboldt, Saskatchewan, Canada S0K 2A0
Telephone: (306) 682-2555
3000 College Drive South
Lethbridge, Alberta, Canada T1K 1L6
Telephone: (403) 329-1212
FAX: (403) 329-5562
http://www.agric.gov.ab.ca/navigation/engineering/
afmrc/index.html
Test Stations:
P.O. Box 1060
Portage la Prairie, Manitoba, Canada R1N 3C5
Telephone: (204) 239-5445
Fax: (204) 239-7124
P.O. Box 1150
Humboldt, Saskatchewan, Canada S0K 2A0
Telephone: (306) 682-5033
Fax: (306) 682-5080
This report is published under the authority of the minister of Agriculture for the Provinces of Alberta, Saskatchewan and Manitoba and may not be reproduced in whole or in part without the prior
approval of the Alberta Farm Machinery Research Centre or The Prairie Agricultural Machinery Institute.
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