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1、BRITISH STANDARD BS ISO 5801:2007 BS 848-1:2007 Industrial fans Performance testing using standardized airways ICS 23.120 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo repro
2、duction or networking permitted without license from IHS -,-,- BS ISO 5801:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 BSI 2008 ISBN 978 0 580 56174 0 National foreword This British Standard is the UK implementation
3、of ISO 5801:2007. It supersedes BS 848-1:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/17, Fans for general purposes. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does n
4、ot purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Copyright British Standards Institution P
5、rovided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from IHS -,-,- Reference number ISO 5801:2007(E) INTERNATIONAL STANDARD ISO 5801 Second edition 2007-12-15 Industrial
6、 fans Performance testing using standardized airways Ventilateurs industriels Essais arauliques sur circuits normaliss BS ISO 5801:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45
7、 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without licens
8、e from IHS -,-,- iii Contents Page Foreword. vii Introduction. viii 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Symbols and units 16 4.1 Symbols. 16 4.2 Subscripts . 19 5 General. 19 6 Instruments for pressure measurement. 20 6.1 Barometers 20 6.2 Manometers. 21 6.3 Damping of
9、 manometers 21 6.4 Checking of manometers. 21 6.5 Position of manometers. 22 7 Determination of average pressure in an airway. 22 7.1 Methods of measurement 22 7.2 Use of wall tappings. 22 7.3 Construction of tappings. 22 7.4 Position and connections 23 7.5 Checks for compliance. 23 7.6 Use of Pitot
10、-static tube. 23 8 Measurement of temperature 24 8.1 Thermometers. 24 8.2 Thermometer location 24 8.3 Humidity. 24 9 Measurement of rotational speed . 25 9.1 Fan shaft speed. 25 9.2 Acceptable instruments. 25 10 Determination of power input 25 10.1 Measurement accuracy 25 10.2 Fan shaft power 25 10.
11、3 Determination of fan shaft power by electrical measurement. 25 10.4 Impeller power. 26 10.5 Transmission systems. 26 11 Measurement of dimensions and determination of areas 26 11.1 Flow-measurement devices. 26 11.2 Tolerance on dimensions 26 11.3 Determination of cross-sectional area . 27 12 Deter
12、mination of air density, humid gas constant and viscosity 27 12.1 Density of air in the test enclosure at section x 27 12.2 Determination of vapour pressure 28 12.3 Determination of air viscosity . 30 13 Determination of flow rate . 31 13.1 General. 31 BS ISO 5801:2007 Copyright British Standards In
13、stitution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from IHS -,-,- iv 13.2 In-line flowmeters (standard primary devices)31 13.3 Traverse methods .32 14 Calcul
14、ation of test results34 14.1 General.34 14.2 Units .34 14.3 Temperature.34 14.4 Mach number and reference conditions.36 14.5 Fan pressure40 14.6 Calculation of stagnation pressure at a reference section of the fan from gauge pressure, pex, measured at a section x of the test duct43 14.7 Inlet volume
15、 flow rate .44 14.8 Fan air power and efficiency44 15 Rules for conversion of test results52 15.1 Laws on fan similarity.52 15.2 Conversion rules.54 16 Fan characteristic curves.57 16.1 General.57 16.2 Methods of plotting.58 16.3 Characteristic curves at constant speed58 16.4 Characteristic curves a
16、t inherent speed.58 16.5 Characteristic curves for adjustable-duty fan59 16.6 Complete fan characteristic curve 60 16.7 Test for a specified duty.61 17 Uncertainty analysis .62 17.1 Principle.62 17.2 Pre-test and post-test analysis62 17.3 Analysis procedure.62 17.4 Propagation of uncertainties .62 1
17、7.5 Reporting uncertainties63 17.6 Maximum allowable uncertainties measurement 63 17.7 Maximum allowable uncertainty of results.64 18 Selection of test method 65 18.1 Classification.65 18.2 Installation categories 65 18.3 Test report65 18.4 User installations 66 18.5 Alternative methods66 18.6 Duct
18、simulation .66 19 Installation of fan and test airways .66 19.1 Inlets and outlets.66 19.2 Airways.66 19.3 Test enclosure.67 19.4 Matching fan and airway 67 19.5 Outlet area67 20 Carrying out the test.67 20.1 Working fluid .67 20.2 Rotational speed .67 20.3 Steady operation.67 20.4 Ambient condition
19、s.68 20.5 Pressure readings.68 20.6 Tests for a specified duty.68 20.7 Tests for a fan characteristic curve 68 20.8 Operating range 68 21 Determination of flow rate68 21.1 Multiple nozzle.68 21.2 Conical or bellmouth inlet68 BS ISO 5801:2007 Copyright British Standards Institution Provided by IHS un
20、der license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from IHS -,-,- v 21.3 Orifice plate . 68 21.4 Pilot-static tube traverse (see ISO 3966 and ISO 5221). 69 22 Determination of flow rate
21、 using multiple nozzles 69 22.1 Installation. 69 22.2 Geometric form. 69 22.3 Inlet zone . 70 22.4 Multiple-nozzle characteristics 70 22.5 Uncertainty 72 23 Determination of flow rate using a conical or bellmouth inlet. 73 23.1 Geometric form. 73 23.2 Screen loading 74 23.3 Inlet zone . 75 23.4 Coni
22、cal inlet performance 75 23.5 Bellmouth inlet performance. 75 23.6 Uncertainties . 77 24 Determination of flow rate using an orifice plate 77 24.1 Installation. 77 24.2 Orifice plate . 77 24.3 Ducts 81 24.4 Pressure tappings. 81 24.5 Calculation of mass flow rate 81 24.6 Reynolds number 82 24.7 In-d
23、uct orifice with D and D/2 taps see Figure 20 a) and ISO 5167-1 82 24.8 Outlet orifice with wall tappings see Figure 20 c) and e). 86 25 Determination of flow rate using a Pitot-static tube traverse 88 25.1 General. 88 25.2 Pitot-static tube. 88 25.3 Limits of air velocity. 93 25.4 Location of measu
24、rement points 93 25.5 Determination of flow rate . 94 25.6 Flow rate coefficient. 94 25.7 Uncertainty of measurement . 95 26 Installation and setup categories 95 26.1 Category A: free inlet and free outlet 95 26.2 Category B: free inlet and ducted outlet 95 26.3 Category C: ducted inlet and free out
25、let 96 26.4 Category D: ducted inlet and ducted outlet. 96 26.5 Test installation type 96 27 Flow straighteners 96 27.1 Types of straightener . 97 27.2 Rules for use of a straightener 98 28 Common-segment airways for ducted fan installations. 99 28.1 Common segments. 99 28.2 Common segment at fan ou
26、tlet. 99 28.3 Common segment at fan inlet . 101 28.4 Outlet duct simulation 103 28.5 Inlet duct simulation. 103 28.6 Loss allowances for standardized airways 104 29 Standardized test chambers 107 29.1 Test chamber. 107 29.2 Variable supply and exhaust systems 112 29.3 Standardized inlet test chamber
27、s . 112 29.4 Standardized outlet test chambers. 115 30 Standard methods with test chambers Category A installations . 118 30.1 Types of fan setup 118 BS ISO 5801:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not
28、for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from IHS -,-,- vi 30.2 Inlet-side test chambers.118 30.3 Outlet-side test chambers131 31 Standard test methods with outlet-side test ducts Category B installations 136 31.1 Types of fan setup 136 31.2 Outlet-s
29、ide test ducts with antiswirl device.137 31.3 Outlet chamber test ducts without antiswirl device149 32 Standard test methods with inlet-side test ducts or chambers Category C installations156 32.1 Types of fan setup 156 32.2 Inlet-side test ducts 157 32.3 Inlet-side test chambers.170 33 Standard met
30、hods with inlet- and outlet-side test ducts Category D installations.180 33.1 Types of fan setup 180 33.2 Installation category B with outlet antiswirl device and with an additional inlet duct or inlet-duct simulation.184 33.3 Installation category B without outlet antiswirl device nor common segmen
31、t, modified with addition of an inlet duct or inlet-duct simulation 190 33.4 Installation category C with common inlet duct, modified with the addition of an outlet common segment with antiswirl device .193 33.5 Installation category C, modified with the addition of an outlet-duct simulation without
32、 antiswirl device .197 Annex A (normative) Fan pressure and fan installation category.205 Annex B (normative) Fan-powered roof exhaust ventilators.209 Annex C (informative) Chamber leakage test procedure .211 Annex D (informative) Fan outlet elbow in the case of a non-horizontal discharge axis217 An
33、nex E (informative) Electrical input power consumed by a fan installation 220 Annex F (informative) Preferred methods of performance testing227 Bibliography .228 BS ISO 5801:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/591
34、0770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from IHS -,-,- vii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International
35、Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, al
36、so take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committ
37、ees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the poss
38、ibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 5801 was prepared by Technical Committee ISO/TC 117, Industrial fans. This second edition cancels and replaces the first editio
39、n (ISO 5801:1997), which has been technically revised. BS ISO 5801:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:04:45 MDTNo reproduction or networking permitted without license from
40、 IHS -,-,- viii Introduction This International Standard is the result of almost 30 years of discussion, comparative testing and detailed analyses by leading specialists from the fan industry and research organizations throughout the world. It was demonstrated many years ago that the codes for fan p
41、erformance testing established in different countries do not always lead to the same results. The need for an International Standard has been evident for some time and Technical Committee ISO/TC 117 started its work in 1963. Important progress has been achieved over the years and, although the Inter
42、national Standard itself was not yet published, the successive revisions of various national standards led to much better agreement among them. It has now become possible to complete this International Standard by agreement on certain essential points. It must be borne in mind that the test equipmen
43、t, especially for large fans, is very expensive and it was necessary to include in this International Standard many setups from various national codes in order to authorize their future use. This explains the sheer volume of this document. Essential features of this International Standard are as fol
44、lows: a) Categories of installation Since the connection of a duct to a fan outlet and/or inlet modifies its performance, it has been agreed that four standard installation categories should be recognized (see 18.2). A fan adaptable to more than one installation category will have more than one stan
45、dardized performance characteristic. Users should select the installation category closest to their application. b) Common parts The differences obtained by testing the same fan according to various test codes depend chiefly on the flow pattern at the fan outlet and, while often minor, can be of sub
46、stantial significance. There is general agreement that it is essential that all standardized test airways to be used with fans have portions in common adjacent to the fan inlet and/or outlet sufficient to ensure consistent determination of fan pressure. Geometric variations of these common segments
47、are strictly limited. However, conventional agreement has been achieved for some particular situations: 1) For fans where the outlet swirl is less than 15, i.e. centrifugal, cross-flow or vane-axial fans, it is possible to use a simplified outlet duct without straightener when discharging to the atm
48、osphere or to a measuring chamber. If there is any doubt about the degree of swirl, then a test should be performed to establish how much is present. 2) For large fans (outlet diameter exceeding 800 mm), it may be difficult to carry out the tests with standardized common airways at the outlet including a straightener. In this case, by mutual agreement between the parties concerned, the fan performan