BS 848-3(2001) : 2001
Current
The latest, up-to-date edition.
FANS FOR GENERAL PURPOSE - PART 3: PERFORMANCE TESTING IN SITU
Hardcopy , PDF
English
01-01-2001
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Quantities to be measured
5 General conditions and procedures
concerning in situ tests
5.1 General recommendations
5.2 Selection of test point when only the
system resistance to be varied
5.3 Fans fitted with adjustment devices
5.4 System throttling devices allowing the system
resistance to be altered
5.5 Selection of the test point when the system
resistance cannot be varied
5.6 When correction of the coefficient deduced from
the test is not necessary
6 Instrumentation
6.1 Instrumentation for measurement of pressure
6.2 Measurement of air velocity
6.3 Measurement of temperature
6.4 Determination of density
6.5 Measurement of rotational speed
7 Determination of fan pressure
7.1 Location of pressure measurement plane
7.2 Measurement of fan pressure
8 Determination of flow rate
8.1 Choice of measuring method
8.2 Choice of measuring section
8.3 Determination of flowrate using differential pressure
devices
8.4 Determination of flowrate by velocity area methods
9 Determination of power
9.1 Definition of performance characteristics
relating to the power of a fan
9.2 Losses during transmission of power from
the motor to the impeller
9.3 Methods for determination of power
9.4 Measuring instruments
9.5 Precautions to be taken during in situ tests
10 Uncertainty associated with the determination of
fan performance
10.1 General
10.2 Performance errors
10.3 Uncertainty of measurement
10.4 Specified uncertainties
10.5 Analysis of uncertainty
Annex A (normative) - Position of exploration lines for
a marginal wall profile compatible with a general
power law
Annex B (normative) - Determination of the position of the
marginal exploration lines in cases not covered
by Annex A
Annex C (normative) - Minimum straight lengths required
upstream and downstream of the differential
pressure devices (DP device) used for flow measurement
Annex D (normative) - Loss allowance for straight, smooth ducts
and standardized airways
Annex E (normative) - Rotating vane anemometer calibration
Bibliography
Describes tests for determining one or more performance characteristics of fans installed in an operational circuit when handling a monophase fluid.
| Committee |
MCE/17
|
| DevelopmentNote |
Supersedes 98/718875 DC. (05/2005) Also numbered as BS EN ISO 5802. (05/2009)
|
| DocumentType |
Standard
|
| Pages |
96
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| ISO 5802:2001 | Identical |
| ISO 7145:1982 | Determination of flowrate of fluids in closed conduits of circular cross-section Method of velocity measurement at one point of the cross-section |
| IEC 60034-2A:1974 | Rotating electrical machines - Part 2: Methods for determining losses and efficiency of rotating electrical machinery form tests (excluding machines for traction vehicles) - Measurement of losses by the calorimetric method |
| IEC 60051-8:1984 | Direct acting indicating analogue electrical measuring instruments and their accessories. Part 8: Special requirements for accessories |
| ISO 5801:2017 | Fans — Performance testing using standardized airways |
| ISO/TR 5168:1998 | Measurement of fluid flow Evaluation of uncertainties |
| ISO 5167-1:2003 | Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements |
| IEC 60034-1:2017 | Rotating electrical machines - Part 1: Rating and performance |
| IEC 60034-2:1972 | Rotating electrical machines. Part 2: Methods for determining losses and efficiency of rotating electrical machinery from tests (excluding machines for traction vehicles) |
| ISO 7194:2008 | Measurement of fluid flow in closed conduits — Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes |
| ISO 5221:1984 | Air distribution and air diffusion Rules to methods of measuring air flow rate in an air handling duct |
| ISO 3966:2008 | Measurement of fluid flow in closed conduits Velocity area method using Pitot static tubes |
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