1、BS ISO11155-2:2009ICS 43.040.60NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRoad vehicles Airfilters for passengercompartmentsPart 2: Test for gaseous filtrationThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee
2、 on 28 February2009 BSI 2009ISBN 978 0 580 59292 8Amendments/corrigenda issued since publicationDate CommentsBS ISO 11155-2:2009National forewordThis British Standard is the UK implementation of ISO 11155-2:2009. Itsupersedes DD ISO/TS 11155-2:2002 which is withdrawn.The UK participation in its prep
3、aration was entrusted to TechnicalCommittee MCE/21/2, Air filters for air supply to I.C. engines andcompressors - Not on aircraft.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions
4、of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 11155-2:2009Reference numberISO 11155-2:2009(E)ISO 2009INTERNATIONAL STANDARD ISO11155-2First edition2009-01-15Road vehicles Air filters for passeng
5、er compartments Part 2: Test for gaseous filtration Vhicules routiers Filtres air pour lhabitacle Partie 2: Essai pour le filtrage des gaz BS ISO 11155-2:2009ISO 11155-2:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be
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8、e is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reprod
9、uced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 74
10、9 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedBS ISO 11155-2:2009ISO 11155-2:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Measureme
11、nt accuracy 4 4.1 Flow rate 4 4.2 Pressure. 4 4.3 Temperature 4 4.4 Relative humidity 4 4.5 Challenge gas 4 5 General conditions . 4 5.1 Conditioning of challenge gas 4 5.2 Cleanliness of influent air 4 5.3 Challenge gas concentration stability 4 6 Test contaminants 5 6.1 Mandatory contaminants . 5
12、6.2 Optional contaminants. 5 6.3 Other contaminants 5 7 Test equipment . 6 7.1 General layout . 6 7.2 Test stand performance . 6 7.3 Air supply 6 7.4 Test duct 6 7.5 Contaminant generation and supply 6 7.6 Sampling and analysis of challenge gas 7 7.7 Test equipment constituents. 7 8 Experimental det
13、ermination of t0, using tlag. 8 9 Preparation of filter/filter element for testing 8 10 Test methods. 8 10.1 Purpose 8 10.2 Air pressure loss. 8 10.3 Preparation of challenge gases. 9 10.4 Determination of efficiency/breakthrough . 9 10.5 Determination of capacity 9 10.6 Data and analysis 9 10.7 Det
14、ermination of desorption (optional) 10 11 System validation . 10 11.1 Air flow uniformity 10 11.2 Verification challenge gas stability (without test filter) 10 12 Test report . 11 Annex A (normative) Test stand configuration. 12 Annex B (normative) Detailed definition and calculation of t0and tlag.
15、13 Annex C (normative) Capacity determination . 15 Annex D (informative) Conversion of test contaminant concentration units 16 Bibliography . 17 BS ISO 11155-2:2009ISO 11155-2:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide fede
16、ration 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 right to be represented on that commi
17、ttee. 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. International Standards are drafted in accordan
18、ce 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 an International Standard requires
19、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. ISO 11155-2 was prepared by Technical
20、Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection equipment and filters for use on road vehicles. This first edition of ISO 11155-2 cancels and replaces the ISO/TS 11155-2:2002, which has been technically revised. ISO 11155 consists of the following parts, under the general title Road
21、 vehicles Air filters for passenger compartments: Part 1: Test for particulate filtration Technical Specification Part 2: Test for gaseous filtration BS ISO 11155-2:2009INTERNATIONAL STANDARD ISO 11155-2:2009(E) ISO 2009 All rights reserved 1Road vehicles Air filters for passenger compartments Part
22、2: Test for gaseous filtration 1 Scope This part of ISO 11155 specifies a test comprising several methods for measuring the dynamic gas adsorption of air filters in the passenger compartments of road vehicles. These laboratory test methods are applicable to air filters that improve air quality by re
23、ducing concentrations of gaseous, odorous or hazardous components from ambient or re-circulated air, or both, in the vehicle cabin. They provide a means of measuring air pressure loss, as well as gas and vapour removal characteristics. 2 Normative references The following referenced documents are in
24、dispensable 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/TS 11155-1, Road vehicles Air filters for passenger compartments Part 1: Test for part
25、iculate filtration ISO 11841-1, Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitions of filters and filter components ISO 11841-2, Road vehicles and internal combustion engines Filter vocabulary Part 2: Definitions of characteristics of filters and their components 3 T
26、erms and definitions For the purposes of this document, the terms and definitions given in ISO 11841-1 and ISO 11841-2 and the following apply. 3.1 test flow rate volume of air passing through the test duct per unit time NOTE It is expressed in actual cubic metres per hour. 3.2 pressure loss differe
27、nce in static pressure measured upstream and downstream of the filter at a specified flow rate NOTE It is expressed in pascals. BS ISO 11155-2:2009ISO 11155-2:2009(E) 2 ISO 2009 All rights reserved3.3 contaminant unwanted constituent dispersed in air 3.4 concentration quantity of one constituent dis
28、persed in another NOTE Contaminant concentrations are generally expressed as mass concentrations, i.e. mass of contaminant in milligrams per cubic metre of air. However, when the contaminant is measured as a volume fraction, i.e. volume of contaminant per volume of air (often in parts per million),
29、it is necessary to convert the volume of contaminant into a mass. Conversion factors are given in Annex D. 3.5 influent air cleaned air used to dilute contaminants and produce the challenge gas 3.6 challenge gas homogeneous mixture of influent air and contaminant used to challenge the filter 3.7 cha
30、llenge gas concentration ratio of the mass (or volume) of test contaminant per volume of influent air measured under specified conditions NOTE Contaminant concentrations are generally expressed as mass concentrations, i.e. mass of contaminant in milligrams per cubic metre of air. However, when the c
31、ontaminant is measured as a volume fraction, i.e. volume of contaminant per volume of air (often in parts per million), it is necessary to convert the volume of contaminant into a mass. Conversion factors are given in Annex D. 3.8 test contaminant mass mTtotal mass of test contaminant to which the f
32、ilter is exposed NOTE It is expressed in milligrams. 3.9 influent concentration C1homogeneous challenge gas concentration measured before (upstream of) the filter NOTE Contaminant concentrations are generally expressed as mass concentrations, i.e. mass of contaminant in milligrams per cubic metre of
33、 air. However, when the contaminant is measured as a volume fraction, i.e. volume of contaminant per volume of air (often in parts per million), it is necessary to convert the volume of contaminant into a mass. Conversion factors are given in Annex D. 3.10 effluent concentration C2homogeneous challe
34、nge gas concentration measured after (downstream of) the filter NOTE Contaminant concentrations are generally expressed as mass concentrations, i.e. mass of contaminant in milligrams per cubic metre of air. However, when the contaminant is measured as a volume fraction, i.e. volume of contaminant pe
35、r volume of air (often in parts per million), it is necessary to convert the volume of contaminant into a mass. Conversion factors are given in Annex D. BS ISO 11155-2:2009ISO 11155-2:2009(E) ISO 2009 All rights reserved 33.11 efficiency ratio of the amount of contaminant removed or reduced by the f
36、ilter relative to the amount exposed to it, calculated as a percentage by ()121100 CCEC= (1) where E is efficiency, C1is the influent concentration, C2is the effluent concentration 3.11.1 1 min efficiency efficiency measurement 1 min after time zero, t03.11.2 2 min efficiency efficiency measurement
37、2 min after t03.11.3 5 min efficiency efficiency measurement 5 min after t03.12 time zero t0calculated zero point based on the shape of the ramp-up curve of challenge gas breakthrough versus time NOTE 1 See Clause 8 and Annex B. NOTE 2 Once this curve is obtained, the t0point can be found by calcula
38、tion. All efficiency or penetration data are calculated from the designated t0. 3.13 start of test time tstarttime at which the challenge gas is introduced into the test system 3.14 lag time tlagtime difference between tstartand t0NOTE See Annex B. 3.15 end of test time tftime at which a user-specif
39、ied efficiency (typically 5 %) or user-specified time is reached 3.16 total test time duration of exposure of the filter to the challenge gas, beginning at t0BS ISO 11155-2:2009ISO 11155-2:2009(E) 4 ISO 2009 All rights reserved3.17 capacity mcmass of contaminant removed from the challenge gas stream
40、 by the filter during the total test time NOTE It is normally expressed in milligrams. 3.18 desorption release of previously trapped contaminants from a test filter 4 Measurement accuracy 4.1 Flow rate The measurement devices shall be calibrated relative to the respective challenge or contaminant ga
41、ses. Their accuracy shall be within 3 % of the specified value. 4.2 Pressure Differential pressure accuracy shall be within 2 % of the measured value. 4.3 Temperature Temperature shall be monitored to within 0,5 C accuracy. 4.4 Relative humidity Relative humidity shall be monitored to within 2 %. 4.
42、5 Challenge gas Challenge gas measurement accuracy for n-butane, toluene and SO2shall be 3 % of the measured value. 5 General conditions 5.1 Conditioning of challenge gas The temperature of the challenge gas shall be (23 3) C and the relative humidity shall be (50 2) %. 5.2 Cleanliness of influent a
43、ir The content of organic contaminants in the influent air shall not exceed the equivalent of a volume fraction of 2 106 of total hydrocarbon. High efficiency particulate air (HEPA) filtration (see EN 779) is recommended for the removal of particulate contaminants. 5.3 Challenge gas concentration st
44、ability Influent concentration shall be maintained to within 3 % of the set point concentration for the duration of the test. BS ISO 11155-2:2009ISO 11155-2:2009(E) ISO 2009 All rights reserved 56 Test contaminants 6.1 Mandatory contaminants Mandatory test contaminants are chosen either because thei
45、r presence at high levels signifies deterioration in air quality or because they provide useful indications of performance for certain types of purification systems. Mandatory contaminants, purities and concentrations are specified in Table 1. Table 1 Test contaminants Concentration Test contaminant
46、 Minimum purity % Set point Volume fraction in parts per millionbConversion factorcn-butanea99,5 80 8 2,39 Toluene 99,5 80 8 3,79 aIncluded because it provides a useful and facile test for activated carbon-based adsorption systems. Butane could be of limited value for systems that do not rely on act
47、ivated carbon adsorption. In these cases, another test contaminant may be substituted. bSee Annex D for calculation of conversion factors. cAllows conversion to milligrams per cubic metre at 23 C and a barometric pressure of 101 kPa. 6.2 Optional contaminants Tests using the optional contaminant are
48、 subject to agreement between customer and manufacturer. Recommended contaminants, purities and concentrations are given in Table 2. Table 2 Optional test contaminant Concentration Test contaminant Minimum purity % Set point Volume fraction in parts per millionbConversion factorcSO2a99,5 30 3 2,64 a
49、Included because it can be used to represent the family of acid gases in determining the performance of carbon-based adsorption systems. bSee Annex D for calculation of conversion factors. cAllows conversion to milligrams per cubic metre at 23 C and a barometric pressure of 101 kPa. 6.3 Other contaminants See Annex D for other contaminants. The use of other gases could be of interest for dedicated applications. Gases of interest shall be agreed between customer and manufacturer.BS
