BS EN ISO 9785-2002 Ship and marine technology - Ventilation of cargo spaces where vehicles with internal combustion engines are driven - Calculation of theoretical total airflow r.pdf

1、BRITISH STANDARD BS EN ISO 9785:2002 Incorporating Corrigendum No. 1 Ship and marine technology Ventilation of cargo spaces where vehicles with internal combustion engines are driven Calculation of theoretical total airflow required The European Standard EN ISO 9785:2002 has the status of a British

2、Standard ICS 47.020.90 BS EN ISO 9785:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 9 August 2002 BSI 10 October 2002 ISBN 0 580 40206 1

3、 National foreword This British Standard is the official English language version of EN ISO 9785:2002. It is identical with ISO 9785:2002. The UK participation in its preparation was entrusted by Technical Committee SME/32, Ships and marine technology, to Subcommittee SME/32/3, Piping and machinery,

4、 which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under t

5、he section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct appli

6、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mo

7、nitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 10, an inside back cover an

8、d a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14127 Corrigendum No.1 10 October 2002 Correction to EN ISO foreword pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO9785

9、July2002 ICS47.020.90 Englishversion ShipsandmarinetechnologyVentilationofcargospaces wherevehicleswithinternalcombustionenginesaredriven Calculationoftheoreticaltotalairflowrequired(ISO9785:2002) NaviresettechnologiemaritimeVentilationdesespaces cargaisondesnaviresdanslesquelsdesvhicules moteurcomb

10、ustioninternesontutilissCalculdudbit dairtotalthoriqueexig(ISO9785:2002) SchiffeundMeerestechnikLftungvonLaderumen,in denenKraftfahrzeugemitVerbrennungsmotorenbetrieben werdendrfenBerechnungdestheoretischbentigten GesamtLuftvolumenstroms(ISO9785:2002) ThisEuropeanStandardwasapprovedbyCENon30May2002.

11、 CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyC

12、ENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustri

13、a,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B10

14、50Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO9785:2002EINESO79:5802(20E) 2 CORRECTED20020918 Foreword Thisdocument(ENISO9785:2002)hasbeenpreparedbyTechnicalCommitteeISO/TC8 “Shipsandmarinetechnology“incollaborationwithTechnicalC

15、ommitteeCEN/TC300“Sea goingvesselsandmarinetechnology“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyJanuary2003,andconflictingnational standardsshallbewithdrawnatthelatestbyJanuary2003

16、. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switze

17、rlandandthe UnitedKingdom. Endorsementnotice ThetextofISO9785:2002hasbeenapprovedbyCENasENISO9785:2002withoutany modifications. ENISO9785:2002 INTERNATIONAL STANDARD ISO 9785 Second edition 2002-07-15 Reference number ISO 9785:2002(E) Ships and marine technology Ventilation of cargo spaces where veh

18、icles with internal combustion engines are driven Calculation of theoretical total airflow required Navires et technologie maritime Ventilation des espaces cargaison des navires dans lesquels des vhicules moteur combustion interne sont utiliss Calcul du dbit dair total thorique exigENISO9785:2002 ii

19、 ENISO9785:2002 iii Contents Page 1 Scope . 1 2 Terms and definitions 1 3 Airflow calculation . 1 4 Pollution from vehicles 3 5 Factors of dilution . 3 Annexes A Pollutants from vehicles in cargo spaces in ships. 4 B General information and guidance as to good practice 8 ENISO9785:2002 iv Foreword I

20、SO (the International Organization for 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 c

21、ommittee has been established has the right 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 electr

22、otechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires ap

23、proval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO

24、 9785 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 3, Piping and machinery. This second edition cancels and replaces the first edition (ISO 9785:1990), which was revised for continued consistency with International Marine Organization provisions for calc

25、ulating required ventilation in cargo spaces where vehicles with internal combustion engines may be driven. Annex A forms a normative part of this International Standard. Annex B is for information only. ENISO9785:2002 v Introduction The purpose of this International Standard is to ensure that expos

26、ure to substances hazardous to health should be kept as low as is reasonably practicable in work areas in cargo spaces in ships. This can, as a rule, be achieved by limiting exhaust gas emissions as far as possible (by controlling the traffic) and by providing a high flow of air in the cargo spaces.

27、 For further information and guidance regarding good practice, please refer to recent guidelines developed by the International Maritime Organization which are contained in the IMO Maritime Safety Committee Circular 729 (MSC Circ. 729), Guidelines and Operational Recommendations for Ventilation Syst

28、ems in RO-RO Cargo Spaces. ENISO9785:2002 1 Ships and marine technology Ventilation of cargo spaces where vehicles with internal combustion engines are driven Calculation of theoretical total airflow required 1 Scope This International Standard specifies methods of calculating the theoretical quanti

29、ty of outdoor air required in cargo spaces of ships where vehicles with internal combustion engines are driven, in order to dilute the polluted air to within the permitted occupational exposure limits. Annex A specifies average values of the amounts of pollutants in exhaust gases from vehicles with

30、internal combustion engines driven in cargo spaces in ships. Annex B gives general information and guidance as to good practice for the ventilation of cargo spaces in ships where vehicles with internal combustion engines may be driven. Users of this International Standard should note that, while obs

31、erving the requirements of the standard, they should at the same time ensure compliance with such statutory requirements, rules, and regulations as may be applicable to the individual ship concerned. Users should also refer to guidelines developed by the International Maritime Organization (IMO) con

32、tained in the Maritime Safety Committee Circular 729 (MSC Circ. 729), Guidelines and Recommendations for Ventilation systems in RO-RO Cargo Spaces. 2 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 2.1 cargo space space used for cargo

33、 where vehicles may be driven 2.2 occupational exposure limit highest airborne concentrations averaged over a specified period of time (time-weighted average or TWA) of substances hazardous to health for employees at work NOTE An occupational exposure limit refers either to a long-term exposure limi

34、t or to a short-term exposure limit as determined by the appropriate authority. 2.3 working area area occupied by employees at work 3 Airflow calculation 3.1 Volume of space The volume of total cargo spaces shall be the gross volume with no deduction for the cargoes or for frames, webs, pillars, duc

35、ts, etc. In the case of lining or insulation of cargo spaces, the volume shall be calculated from the inside of the lining or insulation. ENISO9785:2002 2 3.2 Supply airflow 3.2.1 General The outdoor-supply airflow to the cargo spaces shall be calculated using whichever of the following criteria giv

36、es the highest value: minimum number of air changes according to applicable statutory requirements; required outdoor-supply airflow to maintain the occupational-exposure limit-value. 3.2.2 Supply airflow to maintain the occupational-exposure-limit value 3.2.2.1 Introduction The sum of the required o

37、utdoor-supply airflows per vehicle in operation to maintain the occupational-exposure-limit value is calculated in accordance with 3.2.2.2 or 3.2.2.3 for normally polluted outdoor air or highly polluted outdoor air, respectively. 3.2.2.2 Normally polluted outdoor air The required outdoor-supply airf

38、low, , per vehicle in operation for normally polluted outdoor air, in cubic metres per second ( ), is given by the equation where is the pollution per vehicle in operation, in milligrams per second (see clause 4); is the factor of dilution (see clause 5); is the occupational-exposure-limit value, in

39、 milligrams per cubic metre. (See typical examples of application in B.2.) NOTE The pollution contents of normally polluted outdoor air can be taken to be less than 1/40 of the occupational-exposure- limit value. 3.2.2.3 Highly polluted outdoor air The required outdoor-supply airflow, , per vehicle

40、in operation for highly polluted outdoor air, in cubic metres per second, is given by the equation: where , and are as defined in 3.2.2.2; is the content of the pollutant in question in outdoor air, in milligrams per cubic metre. q p m 3 /s q p = q m ac q m a c q p q p = q m a(cc ) q m ac c ENISO978

41、5:2002 3 4 Pollution from vehicles The purchaser shall specify the type of engine in the vehicles, the engine size, operation cycles (activity on board) and the anticipated number of vehicles normally in operation simultaneously in each working area. Where specific data on the amount of pollutants (

42、substances hazardous to health) generated by these vehicles are not available, the data according to A.1 shall be used. If the operation cycles are not the same as in A.1, quantities calculated according to A.2 shall apply. 5 Factors of dilution The factor of dilution indicates the degree of estimat

43、ed or possible dilution of the air pollution in the cargo spaces. The purchaser shall specify the factor of dilution taking into account any legal requirements. In the absence of such a specification, the following factors shall apply: 0,8 in general cargo spaces; 0,4 in cargo spaces in car carriers

44、; 0,8 in cargo spaces in ferries with a ventilation system in which the air is supplied at one end and exhausted at the opposite end of the space. NOTE Guidelines for factors of dilution are given in B.4. ENISO9785:2002 4 Annex A (normative) Pollutants from vehicles in cargo spaces in ships A.1 Asse

45、ssment of pollutants in exhaust gases generated by vehicles on board ships A.1.1 Average values of pollutants Average values of the amount of pollutants in question in exhaust gases generated by vehicles with internal combustion engines running in ships cargo holds are given in A.1.2 to A.1.6. A.1.2

46、 Larger trucks These are used for loading and unloading of Ro/Ro cargo ships. A.1.3 Smaller trucks These are used for local cargo handling on board ships. A.1.4 Larger ferries and coaches These may be driven on board ferries and Ro/Ro ships. Normal operating cycle: lift ( ), transport, and some idli

47、ng Average amount of NO 2generated: Type of motor : turbo-charged compression-ignition (diesel) engine power Normal operating cycle: lift, transport, and idling Average amount of NO 2generated: Average amount of CO generated: Type of motor : suction-fed compression-ignition engine power Normal opera

48、ting cycle: charging the compressed air systems for the brakes, acceleration and running at low speed Average amount of NO 2generated: at cold start Type of motor : turbo-charged compression-ignition engine power 45 s 36 mg/s 150 kW 3 mg/s 50 mg/s 74 kW 45 mg/s 150 kW ENISO9785:2002 5 A.1.5 Passenger cars (low speed)