BS-5775-4-1993 ISO-31-4-1992.pdf
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1、BRITISH STANDARD BS 5775-4: 1993 ISO 31-4:1992 Specification for Quantities, units and symbols Part 4: Heat UDC 389.15/.16:536:006.72 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-4:1993 This British Standard, having been prepared
2、under the direction of the Systems Department Steering Committee, was published under the authority of the Standards Board and comes into effect on 15 March 1993 BSI 05-1999 First published September 1979 Second edition March 1993 The following BSI references relate to the work on this standard: Com
3、mittee reference S/1 Draft for comment 90/53415 DC ISBN 0 580 21998 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Systems Department Steering Committee (S/-) to Technical Committee S/1, upon which the following bodies were represente
4、d: Chartered Institution of Building Services Engineers Department of Trade and Industry (National Physical Laboratory) Department of Trade and Industry (National Weights and Measures Laboratory) EEA (the Association of Electronics, Telecommunications and Business Equipment Industries) Institute of
5、Physics Institute of Trading Standards Administration Institution of Chemical Engineers Institution of Electrical Engineers Institution of Mechanical Engineers Institution of Structural Engineers Royal Society Royal Society of Chemistry Schools Mathematics Project Society of Chemical Industry Amendm
6、ents issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-4:1993 BSI 05-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope2 2Normative refere
7、nces2 3Names and symbols2 Annex A (informative) Units based on the foot, pound and second and some other units12 Annex B (informative) Other units given for information, especially regarding the conversion factor14 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri D
8、ec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-4:1993 ii BSI 05-1999 National foreword This Part of BS 5775 has been prepared under the direction of the Systems Department Steering Committee. It is identical with ISO 31-4:1992 Quantities and units Part 4: Heat, published by the In
9、ternational Organization for Standardization (ISO). ISO 31-4 was prepared by Technical Committee ISO/TC 12 “Quantities, units, symbols, conversion factors” with the active participation and approval of the UK. This Part of BS 5775 supersedes BS 5775-4:1979, which is withdrawn. The principal changes
10、made in this revised version are as follows: a) the decision by the International Committee for Weights and Measures (Comit International des Poids et Mesures, CIPM) in 1980 concerning the status of supplementary units has been incorporated; b) the International Practical Temperature Scale 1968, IPT
11、S-68, has been replaced by the International Temperature Scale 1990, ITS-90; c) a number of new items have been added. BS 5775 comprises the following Parts, each of which is identical with the corresponding Part of ISO 31. Part 0: General principles; Part 1: Space and time; Part 2: Periodic and rel
12、ated phenomena; Part 3: Mechanics; Part 4: Heat; Part 5: Electricity and magnetism; Part 6: Light and related electromagnetic radiations; Part 7: Acoustics; Part 8: Physical chemistry and molecular physics; Part 9: Atomic and nuclear physics; Part 10: Nuclear reactions and ionizing radiations; Part
13、11: Mathematical signs and symbols for use in the physical sciences and technology; Part 12: Characteristic numbers; Part 13: Solid state physics. The reference to Metrologia, 27 (1990), No. 1 is given in the remarks to items 4-1.a and 4-2.a for information only and does not affect the use of this s
14、tandard. Cross-references International standardCorresponding British Standard BS 5775 Specification for quantities, units and symbols ISO 31-0:1992Part 0:1993 General principles (Identical) ISO 31-8:1992Part 8:1993 Physical chemistry and molecular physics (Identical) Licensed Copy: sheffieldun shef
15、fieldun, na, Fri Dec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5775-4:1993 BSI 05-1999iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Sta
16、ndard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpo
17、rated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:58:55 GMT+00:00 2006, Uncontrolled Copy, (c) B
18、SI ISO 31-4:1992(E) BSI 05-19991 Introduction 0.1 Arrangement of the tables The tables of quantities and units in ISO 31 are arranged so that the quantities are presented on the left-hand pages and the units on the corresponding right-hand pages. All units between two full lines belong to the quanti
19、ties between the corresponding full lines on the left-hand pages. Where the numbering of an item has been changed in the revision of a part of ISO 31, the number in the preceding edition is shown in parentheses on the left-hand page under the new number for the quantity; a dash is used to indicate t
20、hat the item in question did not appear in the preceding edition. 0.2 Tables of quantities The most important quantities within the field of this document are given together with their symbols and, in most cases, definitions. These definitions are given merely for identification; they are not intend
21、ed to be complete. The vectorial character of some quantities is pointed out, especially when this is needed for the definitions, but no attempt is made to be complete or consistent. In most cases only one name and only one symbol for the quantity are given; where two or more names or two or more sy
22、mbols are given for one quantity and no special distinction is made, they are on an equal footing. When two types of italic (sloping) letter exist (for example as with , ; ; ; g, g) only one of these is given. This does not mean that the other is not equally acceptable. In general it is recommended
23、that such variants should not be given different meanings. A symbol within parentheses implies that it is a “reserve symbol”, to be used when, in a particular context, the main symbol is in use with a different meaning. 0.3 Tables of units 0.3.1 General Units for the corresponding quantities are giv
24、en together with the international symbols and the definitions. For further information, see ISO 31-0. The units are arranged in the following way: a) The names of the SI units are given in large print (larger than text size). The SI units have been adopted by the General Conference on Weights and M
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