1、BRITISH STANDARD BS EN ISO 8861:1998 Shipbuilding Engine-room ventilation in diesel-engined ships Design requirements and basis of calculations The European Standard EN ISO8861:1998 has the status of a British Standard ICS 47.020.90BSENISO8861:1998 This British Standard, having been prepared under t
2、he directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 July1998 BSI 04-1999 ISBN 0 580 29618 0 National foreword This British Standard is the English language version of EN ISO8861:1998. It is identical with ISO8861:1998. The UK
3、 participation in its preparation was entrusted to Technical Committee SME/32, Steering committee for shipbuilding and marine standards, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretat
4、ion, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact
5、that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under
6、 the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct app
7、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page, page 2, the ISO title page, page ii, pages1 to11 and aback cover. This standard
8、 has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO8861:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Forewo
9、rd 2 Foreword ii Text of ISO8861 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8861 May 1998 ICS 47.020.90 Descriptors: See ISO document English version Shipbuilding Engine-room ventilation in diesel-engined ships Design requirements and basis of calculations (ISO8861:1998) Const
10、ruction navale Ventilation du compartiment machines des navires moteurs diesels Exigences de conception et bases de calcul (ISO8861:1998) Schiffbau Maschinennraum-Lftung auf Schiffen mit Dieselmotoren-Antrieb Grundlagen fr Entwurf und Auslegung (ISO8861:1998) This European Standard was approved by C
11、EN on25 January1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards
12、 may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the
13、Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kin
14、gdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8861:1
15、998EENISO8861:1998 BSI 04-1999 2 Foreword The text of the International Standard ISO8861:1998 has been prepared by Technical Committee ISO/TC8 “Ships and marine technology” in collaboration with Technical Committee CEN/TC300 “Sea-going vessels and marine technology”, the secretariat of which is held
16、 by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November1998, and conflicting national standards shall be withdrawn at the latest by November1998. According to the CEN/CENELEC Internal Re
17、gulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
18、 United Kingdom. Endorsement notice The text of the International Standard ISO8861:1998 was approved by CEN as a European Standard without any modification. Contents Page 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Design conditions 1 5 Airflow calculation 2 6 Calculation of heat emission 4
19、 7 Graphs 7 Annex A (informative) Guidance and good practice 11 Table 1 Heat emission, from hot tanks 6ENISO8861:1998 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Int
20、ernational 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 w
21、ith ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
22、an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO8861 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC3, Piping and machinery. This second edition cancels and replaces the first edition
23、 (ISO8861:1988), of which it constitutes a technical revision. Annex A of this International Standard is for information only. Descriptors: Shipbuilding, ships, propulsion engines, diesel engines, machine rooms, ventilation, air flow, specifications, design, rules of calculation.ENISO8861:1998 BSI 0
24、4-1999 1 1 Scope This International Standard specifies design requirements and suitable calculation methods for the ventilation of the engine room in diesel-engined ships, for normal conditions in all waters. Annex A provides guidance and good practice in the design of ventilation systems for ships
25、engine rooms. NOTEUsers of this International Standard should note that, while observing 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. 2 Normative referen
26、ces The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Stan
27、dard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO31-1:1992, Quantities and units Part1: Space and time. ISO31-3:1992, Quantities and units Pa
28、rt3: Mechanics. ISO31-4:1992, Quantities and units Part4: Heat. ISO3046-1:1995, Reciprocating internal combustion engines Performance Part1: Standard reference conditions, declarations of power, fuel and lubricating oil consumptions, and test methods. ISO3258:1976, Air distribution and air diffusion
29、 Vocabulary. 3 Definitions For the purposes of this International Standard, the definitions given below, together with those in ISO31-1, ISO31-3, ISO31-4, ISO3046-1and ISO3258, apply. 3.1 engine room space containing main propulsion machinery, boiler(s), diesel generator(s) and major electrical mach
30、inery, etc. 3.2 ventilation provision of air to an enclosed space to meet the needs of the occupants and/or the requirements of the equipment therein 3.3 service standard power the continuous brake power which the engine manufacturer declares that an engine is capable of delivering, using only the e
31、ssential dependent auxiliaries, between the normal maintenance intervals stated by the manufacturer and under the following conditions: a) at a stated speed at the ambient and operating conditions of the engine application; b) with the declared power adjusted or corrected as determined by the manufa
32、cturer to the stated ambient and operating conditions of the engine application; c) with the maintenance prescribed by the engine manufacturer being carried out. ISO3046-1:1995 seeA.1 in Annex A of ISO3046-1:1995. 4 Design conditions The outside ambient air temperature shall be taken as +35C. Temper
33、ature rise from air intake to air passing from the engine room up to the casing entrance shall be max.12,5K. The capacity of the ventilation plant should be such as to provide comfortable working conditions in the engine room, to supply the necessary combustion air to the diesel engine(s) and boiler
34、(s), and to prevent heat-sensitive apparatus from overheating.ENISO8861:1998 2 BSI 04-1999 In order to meet these requirements, the air should be distributed to all parts of the engine room, so that pockets of stagnant hot air are avoided. Special considerations should be given to areas with great h
35、eat emission and to all normal working areas, where reasonably fresh and clean outdoor air should be provided through adjustable inlet devices. When arranging the air distribution, all normal conditions at sea and in harbour for in-service machinery shall be taken into account. 5 Airflow calculation
36、 5.1 Total airflow The total airflow Q to the engine room shall be at least the larger value of the two following calculations. Combustion air to, and heat emission from, all equipment installed within the casing and funnel shall not be taken into account. The calculations shall be based on simultan
37、eous maximum rating of main propulsion diesel engine(s), diesel generator engine(s), boiler(s) and other machinery under normal sea conditions, and on a temperature increase of12,5K. The calculations should, to the greatest possible extent, be based on information from the manufacturers. Guidance va
38、lues given in this International Standard should be used only when manufacturers information is not available. In order to ensure satisfactory air distribution, combustion air to, and heat emission from, main propulsion diesel engine(s), diesel generator engine(s), generator(s), boiler(s), and possi
39、bly other machinery with considerable heat emission, shall be calculated separately including other conditions as necessary. Spaces separated from the main engine room, such as individual auxiliary engine rooms, boiler rooms and separator rooms, shall also be calculated separately. 5.2 Airflow for c
40、ombustion 5.2.1 Sum of airflow for combustion The sum of the airflow for combustion, q c , shall be calculated, in cubic metres per second, as follows: q c = q dp + q dg + q b where 5.2.2 Airflow for combustion for main propulsion diesel engine(s) The airflow for combustion for the main propulsion d
41、iesel engine(s), q dp , shall be calculated, in cubic metres per second, as follows: where a: Q = q c+ q has calculated according to5.2 and5.3 respectively. b: Q =1,5 q c , i.e.the airflow for combustion +50%. The total airflow to the engine room shall not be less than the airflow for combustion eng
42、ine(s) and boiler(s) plus50%. q dp is the airflow for combustion for main propulsion diesel engine(s), in cubic metres per second (see5.2.2); q dg is the airflow for combustion for diesel generator engine(s), in cubic metres per second (see5.2.3); q b is the airflow for combustion for boiler(s), in
43、cubic metres per second (see5.2.4), if relevant under normal sea conditions. P dp is the service standard power of the main propulsion diesel engine(s) at maximum continuous power output, in kilowatts; m ad is the air requirement for combustion for diesel engine(s), in kilograms per kilowatt second;
44、 q dp P dp m ad - =ENISO8861:1998 BSI 04-1999 3 NOTEWhere specific data for m adare not available, the following values may be used for calculation: = 1,13kg/m 3(i.e.the density of air, at +35C,70RH and101,3kPa). 5.2.3 Airflow for combustion for diesel generator engine(s) The airflow for combustion
45、for diesel generator engine(s), q dg , shall be calculated, in cubic metres per second, as follows: where NOTEWhere specific data for m adare not available, the following values may be used for calculation: = 1,13kg/m 3(i.e.the density of air, at +35C,70% RH and101,3kPa). 5.2.4 Airflow for combustio
46、n for boilers and thermal fluid heaters The airflow for combustion for boiler(s), q b , shall be calculated, in cubic metres per second, as follows: In a case where the total steam capacity of a boiler is known, the following formula is used: In a case where the capacity of a boiler or a thermal flu
47、id heater is known in kilowatts, the following formula is used: where m ad = 0,0023kg/(kWs) for2-stroke engines, 0,0020kg/(kWs) for4-stroke engines. P dg is the service standard power of the diesel generator engine(s) at maximum power output, in kilowatts; m ad is the air requirement for diesel engi
48、ne combustion, in kilograms per kilowatt second; m ad = 0,0023kg/(kWs) for2-stroke engines, 0,0020kg/(kWs) for4-stroke engines. Q is the maximum continuous rating of the boiler(s), in kilowatts; m s is the total steam capacity (maximum continuous rating) of the boiler(s), in kilograms per second; m
49、fs is the fuel consumption, in kilograms of fuel per kilogram of steam, or in kilograms of fuel per second per kilowatt of thermal capacity; NOTEWhere specific data are not available, m fs =0,077kg/kg may be used for the calculation if the steam capacity is known. If the thermal capacity is known, m fs =0,11kg s 1kW 1may be used. m af is the air requirement for combustion, in kilograms of air per kilogram of fuel; NOTEWhere specific data are not available, m af =15,7kg/kg may be use
