1、 Reference number ISO 29042-5:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 29042-5 First edition 2010-03-15 Safety of machinery Evaluation of the emission of airborne hazardous substances Part 5: Test bench method for the measurement of the separation efficiency by mass of air cleaning systems with un
2、ducted outlet Scurit des machines valuation de lmission de substances dangereuses vhicules par lair Partie 5: Mthode sur banc dessai pour le mesurage de lefficacit de sparation massique des systmes dpuration dair avec sortie libre ISO 29042-5:2010(E) PDF disclaimer This PDF file may contain embedded
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7、r. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedISO 29042-5:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for
8、Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International 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 r
9、ight to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internation
10、al Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
11、 an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility 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. IS
12、O 29042-5 was prepared by Technical Committee ISO/TC 199, Safety of machinery. ISO 29042 consists of the following parts, under the general title Safety of machinery Evaluation of the emission of airborne hazardous substances: Part 1: Selection of test methods Part 2: Tracer gas method for the measu
13、rement of the emission rate of a given pollutant Part 3: Test bench method for the measurement of the emission rate of a given pollutant Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system Part 5: Test bench method for the measurement of the separation efficiency
14、 by mass of air cleaning systems with unducted outlet Part 6: Test bench method for the measurement of the separation efficiency by mass of air cleaning systems with ducted outlet Part 7: Test bench method for the measurement of the pollutant concentration parameter A room method for the measurement
15、 of the pollutant concentration parameter and a decontamination index are to form the subjects of future parts 8 and 9. ISO 29042-5:2010(E) iv ISO 2010 All rights reservedIntroduction The structure of safety standards in the field of machinery is as follows: a) type-A standards (basic safety standar
16、ds) giving basic concepts, principles for design, and general aspects that can be applied to all machinery; b) type-B standards (generic safety standards) dealing with one safety aspect or one type of safeguard that can be used across a wide range of machinery: type-B1 standards on particular safety
17、 aspects (e.g. safety distances, surface temperature, noise); type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure sensitive devices, guards); c) type-C standards (machine safety standards) dealing with detailed safety requirements for a particular machine or group
18、 of machines. This part of ISO 29042 is a type-B standard as stated in ISO 12100. The requirements of this document can be supplemented or modified by a type-C standard. For machines which are covered by the scope of a type-C standard and which have been designed and built according to the requireme
19、nts of that standard, the requirements of that type-C standard take precedence. ISO/TC 199 has a mandate in this area to produce type-A and type-B standards, which will allow verification of conformity with the essential safety requirements. ISO 29042-5 is based on EN 1093-6:1998, amended by Amendme
20、nt 1:2008, published by the European Committee for Standardization (CEN). INTERNATIONAL STANDARD ISO 29042-5:2010(E) ISO 2010 All rights reserved 1Safety of machinery Evaluation of the emission of airborne hazardous substances Part 5: Test bench method for the measurement of the separation efficienc
21、y by mass of air cleaning systems with unducted outlet 1 Scope This part of ISO 29042 specifies a test bench method for the measurement of the separation efficiency by mass of an air cleaning system with an unducted outlet, operating under defined conditions. The method is applicable to those system
22、s that clean the air of aerosols (smoke, dust, fume, mist), vapour or gas. Measurement of the separation efficiency by mass of an air cleaning system for an intended use can serve for the a) evaluation of the performance of the air cleaning system, b) evaluation of the improvement of the air cleanin
23、g system, c) comparison of air cleaning systems, d) ranking of air cleaning systems according to their separation efficiency by mass, and e) determination of the state of the art of air cleaning systems of the same intended use with respect to their separation efficiency by mass. 2 Normative referen
24、ces The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 12100, Safety of machinery General princi
25、ples for design Risk assessment and risk reduction ISO 29042-5:2010(E) 2 ISO 2010 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 12100 and the following apply. 3.1 separation efficiency by mass sair cleaning system for a given pol
26、lutant, the ratio of the mass of pollutant retained by the air cleaning system (m 3 ) to the mass of pollutant entering the air cleaning system (m 1 ) during a given period NOTE The separation efficiency of an air cleaning system as a percentage is expressed as follows: 3 s 1 100 m m = (1) 4 Princip
27、le The principle of the measurement method is to operate the air cleaning system under defined conditions in a test bench and to determine the mass of the test substance in the air upstream and downstream of the air cleaning system. The test substance, which can be the real pollutant or a surrogate,
28、 should preferably be of low toxicity and compatible with the objectives of the method. 5 Description of the test bench The test bench consists of a cabin symmetrically connected to a measurement duct through which air is drawn (see Figures 1 and 2). Key 1 inlet duct 6 outlet duct 2 injection point(
29、s) of test substance 7 measurement plane 2 3 measurement plane 1 8 air mover 4 test cabin 9 air cleaning system under test 5 funnel d 1 diameter of inlet d 2 diameter of outlet aSecondary air inlet. Figure 1 Test bench with secondary air inlet ISO 29042-5:2010(E) ISO 2010 All rights reserved 3Key 1
30、inlet duct 6 outlet duct 2 injection point(s) of test substance 7 measurement plane 2 3 measurement plane 1 8 air mover 4 test cabin 9 air cleaning system under test 5 funnel d 1 diameter of inlet d 2 diameter of outlet Figure 2 Test bench without secondary air inlet For measurement of the concentra
31、tion in the inlet duct, an even distribution of the test substance shall be achieved. The air volume flow rate of the air cleaning system, Q 1 , and the exhaust air flow rate, Q 2 , shall remain constant during the test within stated limits. The cross-section of the test cabin shall be chosen accord
32、ing to the requirements of the air cleaning system. 6 Position and operation of the air cleaning system To optimize the transport of any pollutant emitted from the air cleaning system to measurement plane 2 (see Figures 1 and 2) in the outlet duct, the air cleaning system should normally be position
33、ed in the test cabin such that the emission from the air cleaning system is in the region of the vertical plane of the longitudinal axis of the outlet duct. Attention shall be given to the aerodynamic conditions in the test cabin and duct to ensure that there is no significant deposition of pollutan
34、t between the air cleaning system and measurement plane 2. The air cleaning system shall be operated according to its intended use and with a specified test substance. For given categories of air cleaning systems, properties of the test substance (e.g. nature, particle size distribution) and its ups
35、tream concentration shall be defined in appropriate type-C standards (see Introduction). The air cleaning system shall be operated in accordance with the manufacturers instructions for use. ISO 29042-5:2010(E) 4 ISO 2010 All rights reserved7 Procedure The mass flow rate of the test substance shall b
36、e determined in the inlet duct from times t 1to t 2and in the outlet duct from times t 1to t 3 . In the inlet duct this mass flow rate can be determined from the mass of test substance feed and the air flow rate. Time t 3shall be later than time t 2and shall take into account the time constants of a
37、ir cleaning system, test cabin and outlet duct. In practical terms the difference between times t 2and t 3may be very short in comparison with the measurement time and may have no effect on the measurement result. The measurement procedures used shall comply with appropriate International Standards.
38、 For the measurement of the air flow rate, see ISO 3966, ISO 4006, ISO 5167-1 and ISO 5168 1) . The same type of instrument should be used both upstream and downstream of the air cleaning system. If this is not possible, the relationship between the two instruments shall be established for each test
39、 substance used. For certain applications it is useful to determine the separation efficiency according to particle size distribution (see ISO 7708). The separation efficiency of some air cleaning systems changes with time, e.g. filters. The sampling procedure shall take into account these changing
40、efficiencies in order to obtain valid information about the efficiency of the separator in use. The measurement time shall be of sufficient duration to allow collection of samples of the test substance emitted during the representative use of the air cleaning system, including, for example, several
41、cycles of the operations of a filter cleaning mechanism. In general, the separation efficiency of a system is dependent on the amount of retained pollutant and the air volume flow rate. Tests shall therefore be carried out with the various combinations of pollutant amounts and air flow rates which a
42、re expected in operation. Detailed test conditions and statistical analysis of the results shall be specified in appropriate type-C standards. 8 Expression of results The separation efficiency, s , of an air cleaning system is calculated as a percentage according to Equation (2): 3 1 2 1 22 3 2 s 11
43、 11 d 100 1 100 1 100 d t t t t QCt m m mm QCt = (2) where m 1 is the mass of the test substance entering the air cleaning system; m 2 is the mass of the test substance not retained by the air cleaning system; 1) In EN 1093-6, on which this part of ISO 29042 is based, reference was made to ISO 4053-
44、1:1977 and ISO 7145:1982. Both International Standards have since been withdrawn and are no longer publicly available; at the time of publication of this part of ISO 29042, they had not been replaced by other International Standards. ISO 29042-5:2010(E) ISO 2010 All rights reserved 5m 3 is the mass
45、of the test substance retained by the air cleaning system; C 1 is the mass concentration of the test substance entering the air cleaning system; C 2 is the mass concentration of the test substance at measurement plane 2; Q 1 is the air volume flow rate in the inlet duct; Q 2 is the air volume flow r
46、ate in the outlet duct. When the separation efficiency is required as a function of particle size distribution, m 1and m 2are measured for each particle size range of interest. 9 Test report The test report shall include at least the following information: a) reference to this part of ISO 29042 (“IS
47、O 29042-5:2010”) and any associated type-C standards; b) description of the air cleaning system tested (manufacturer, model, type, version, design, size, year of manufacture, serial number, etc.); c) operational data during tests, including air flow rates; d) test substance (nature, concentration an
48、d, for dusts, particle size distribution, moisture content, etc.); e) description of measurement procedures, including type of test bench used; f) measuring instruments used and their most recent calibration dates; g) environmental data (temperature, humidity, atmospheric pressure); h) description o
49、f the procedures used (e.g. list of standards) for concentration and flow rate measurements; i) test results; j) any comments on deviations from any relevant standards; k) test laboratory; l) name of the person responsible for carrying out the test; m) date of testing; n) any additional comments. ISO 29042-5:2010(E) 6 ISO 2010 All rights reservedBibliography 1 ISO 3966, Measurement of fluid flow in closed conduits Velocity area
