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1、BRITISH STANDARD BS ISO 7183:2007 Compressed-air dryers Specifications and testing ICS 23.140 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permit
2、ted without license from IHS -,-,- BS ISO 7183:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 BSI 2008 ISBN 978 0 580 53867 4 National foreword This British Standard is the UK implementation of ISO 7183:2007. It superse
3、des BS 6754:1986 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/8, Compressors, pneumatic tools, pneumatic machines and vacuum technology. A list of organizations represented on this committee can be obtained on request to its secretary. This pub
4、lication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments Copyright British Standard
5、s Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Reference number ISO 7183:2007(E) INTERNATIONAL STANDARD ISO 7183 Second edition 2007-1
6、2-15 Compressed-air dryers Specifications and testing Scheurs air comprim Spcifications et essais BS ISO 7183:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction o
7、r networking permitted without license from IHS -,-,- ii Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- iii
8、Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 2 3 Terms and definitions. 2 4 Symbols. 4 4.1 Figure symbols . 4 4.2 Symbols and units 4 4.3 Subscripts . 5 5 Reference conditions . 5 6 Standard rating parameters. 5 7 Performance tests. 6 7.1 Key performance parameters 6
9、7.2 Pressure dew point, flow rate and outlet temperature 6 7.3 Differential pressure drop 8 7.4 Power consumption 8 7.5 System air loss 9 7.6 Dealing with in-cycle variations 12 7.7 Noise 13 7.8 Tests for energy saving devices. 13 7.9 Instrument accuracy. 13 8 Uncertainties . 14 9 Test report . 14 9
10、.1 Statement. 14 9.2 Technical data. 15 Annex A (informative) Types of compressed-air dryers 16 Annex B (informative) Report form for dryer performance 17 Annex C (normative) Noise measurement. 18 Annex D (informative) Pressure-measuring tubes 19 Bibliography. 21 BS ISO 7183:2007 Copyright British S
11、tandards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- iv Foreword ISO (the International Organization for Standardization) is a worldw
12、ide 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 right to be represented on th
13、at 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. International Standards are drafted in
14、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 an International Standard r
15、equires 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 7183 was prepared by Techn
16、ical Committee ISO/TC 118, Compressors and pneumatic tools, machines and equipment, Subcommittee SC 4, Quality of compressed air. This second edition of ISO 7183 revises and replaces the first edition (ISO 7183:1986), together with ISO 7183-2:1996, which have been technically revised. BS ISO 7183:20
17、07 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- v Introduction The scope has been expanded to cover most c
18、urrent types of dryers but also to allow the use of this International Standard and its test methods for any emerging technologies. Any new technologies can then be incorporated at a later revision. Exclusions to this International Standard are generally identified by reference to the definition of
19、a dryer. Specific exclusions have been identified, however, for absorption dryers and dryer processes involving “over- compression” as the means of removing water from compressed air. The process of over-compression employs the principle that water can be removed by compressing the air to a pressure
20、 higher than the intended working pressure thereby forcing out the water from the compressed air and then subsequently expanding the air back to the working pressure. Absorption dryers are now considered to be of minor importance as a drying technique and are, therefore, not considered in this Inter
21、national Standard. BS ISO 7183:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- blank Copyright British S
22、tandards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 Compressed-air dryers Specifications and testing 1 Scope This International St
23、andard specifies the performance data that are necessary to state and applicable test methods for different types of compressed air dryers. It is applicable to compressed air dryers working with an effective (gauge) pressure of more than 50 kPa (0,5 bar), but less than or equal to 1 600 kPa (16 bar)
24、 and include the following: adsorption dryers; membrane dryers; refrigeration dryers (including drying by cooling); or a combination of these. NOTE A description of the principles of operation of the dryers within the Scope of this International Standard is given in Annex A. This International Stand
25、ard identifies test methods for measuring dryer parameters that include the following: pressure dew point; flow rate; pressure drop; compressed-air loss; power consumption; noise emission. This International Standard also provides partial-load tests for determining the performance of energy saving d
26、evices or measures. The mounting, operating and loading conditions of dryers for the measurement of noise are given in Annex C. This International Standard is not applicable to the following types of dryers or drying processes: absorption dryers; drying by over-compression; integral dryers. BS ISO 7
27、183:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 2 Normative references The following referenced do
28、cuments are indispensable for the application of this International Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 261, ISO general purpose metric screw threads General plan
29、 ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation ISO 1179 (all parts), Connections for general use and fluid power Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing ISO 1219-1, Fluid po
30、wer systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols for conventional use and data-processing applications ISO 2602, Statistical interpretation of test results Estimation of the mean Confidence interval ISO 2854, Statistical interpretation of data Techniques of est
31、imation and tests relating to means and variances ISO 3744, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering method for an essentially free field over a reflecting plane 1) ISO 8573-1:2001, Compressed air Part 1: Contaminants and
32、 purity classes ISO 8573-3, Compressed air Part 3: Test methods for measurement of humidity ISO 9614-2, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Measurement by scanning 3 Terms and definitions For the purposes of this document, the following terms
33、and definitions apply. 3.1 absorption chemical process of attracting one substance into the mass of another, so that the absorbed substance combines with the absorbent 3.2 actual vapour pressure partial pressure exerted by the water vapour under the actual temperature condition of the environment 3.
34、3 adsorption physical process in which the molecules of a gas or a vapour adhere to the surface of a solid 3.4 ambient area surrounding the dryer under test 1) To be published. Revision of ISO 3744:1994 BS ISO 7183:2007 Copyright British Standards Institution Provided by IHS under license with BSI -
35、 Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 3.5 integral equipment which is either physically integrated and/or functionally interlinked with the compressor NOTE 1 Interlinking can be
36、 in terms of energy exchange, controls or sharing of other components. NOTE 2 Typically, some of the performance characteristics, such as energy consumption or pressure drop, deviate substantially from those of free-standing air-treatment equipment. 3.6 desiccant adsorbent substance with the ability
37、 to retain water without change of state EXAMPLES Silica gel, activated alumina or molecular sieves. NOTE The term excludes deliquescent substances. 3.7 dew point temperature at which the vapour pressure of the vapour in a humid gas is equal to the saturation vapour pressure over the pure liquid and
38、 at which condensate forms as a liquid on cooling the gas 3.7.1 pressure dew point pdp dew point measured at the actual pressure 3.8 dryer device which lowers absolute moisture content of compressed air by reducing water vapour content such that the exit relative humidity is lower than 100 % NOTE “S
39、eparating” devices that remove only bulk water, such as a cyclone separator, are not dryers. 3.9 peak point at which the measured parameter takes its highest, instantaneous value 3.10 permeate compressed air and water vapour that diffuses through a membrane NOTE The greater the selectivity of the me
40、mbrane for moisture, the lower the permeate loss. 3.11 purge air flow volume-flow of compressed air entering the dryer minus the compressed air leaving the dryer during regeneration cycle NOTE 1 Typically, purge air is expanded to atmospheric pressure. NOTE 2 For membrane dryers, purge air flow is t
41、he sum of “sweep-gas” plus permeate. 3.12 regeneration process of preparation of drying media to enable it to enter a new period of operation BS ISO 7183:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resa
42、le, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 3.13 relative humidity ratio of the actual vapour pressure to the saturation vapour pressure over a plane liquid water surface at the same temperature 3.14 saturation vapour pressure partial pressure
43、of water vapour that is in neutral equilibrium with a plane surface of pure, condensed-phase water or ice at a given temperature 3.15 sweep gas compressed air used in a membrane dryer to carry away moisture from the region outside the membrane 3.16 stabilization period time taken to reach a steady s
44、tate condition of an average value 3.17 test time time taken after the stabilization period to record dryer performance 4 Symbols 4.1 Figure symbols The symbols used in Figures 1 to 3 are in accordance with ISO 1219-1. 4.2 Symbols and units Symbol Term SI unit Other practical units d actual internal
45、 diameter of the tube millimetres l thread length millimetres m mass kilogram gram, milligram P power watt megawatt, kilowatt p pressure kilopascal bar q flow rate cubic metres per second cubic metres per hour cubic metres per minute litres per second L latent heat joules megajoules, kilojoules n nu
46、mber (dimensionless) t time second minute, hour, day V volume cubic metre cubic decimetre, cubic centimetre, cubic millimetre W work joule megajoule, kilojoule, kilowatt-hour X average of a series of measured values, xi of a parameter BS ISO 7183:2007 Copyright British Standards Institution Provided
47、 by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001 Not for Resale, 08/14/2008 22:07:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 4.3 Subscripts Subscript Term AL air loss Av average BL blow-down loss sum sum DC dryer cycle i interval number PF purge flow PL purge air loss E electrical energy v vessel ref reference regn regeneration S steam energy s system TOT total 5 Reference conditions Reference conditions for volume statements shall be as