ISO-11520-2-2001.pdf
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1、Reference number ISO 11520-2:2001(E) ISO 2001 INTERNATIONAL STANDARD ISO 11520-2 First edition 2001-02-01 Agricultural grain driers Determination of drying performance Part 2: Additional procedures and crop-specific requirements Schoirs grains agricoles Dtermination des performances de schage Partie
2、 2: Modes opratoires supplmentaires et exigences spcifiques la rcolte Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted wi
3、thout license from IHS -,-,- ISO 11520-2:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer p
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6、al Secretariat at the address given below. ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at
7、 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 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2001 All rights reserved Copyright International Organizat
8、ion for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11520-2:2001(E) ISO 2001 All rights reservediii ContentsPage Foreword.
9、iv Introduction.v 1Scope 1 2Normative reference1 3Terms and definitions .1 4Symbols and abbreviated terms 4 5Test procedure.5 5.1General5 5.2Test period5 5.3Frequency of sampling grain5 5.4Moisture removal.6 5.5Grain dampening .7 5.6Procedure for a multi-pass test7 6Grain quality.8 6.1General8 6.2In
10、put grain 8 6.3Output grain .9 7Methods of correction of test results 10 7.1General10 7.2Evaporation rate.10 7.3Mass flow rate of grain13 7.4Corrected drying time .13 7.5Specific thermal energy, total energy and fuel consumption.13 8Test report14 Annex A (informative) Grain moisture content and samp
11、ling15 Annex B (informative) Moisture removal in specific crops.19 Annex C (normative) Testing reduction in grain germination20 Annex D (normative) Tables for correction of drier performance21 Annex E (informative) Airflow calculations 99 Bibliography102 Copyright International Organization for Stan
12、dardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11520-2:2001(E) iv ISO 2001 All rights reserved Foreword ISO (the International Or
13、ganization 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 committee has been establ
14、ished 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 electrotechnical standardizati
15、on. 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 approval by at least 75 %
16、of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 11520 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 11520-2 was prepared by Tech
17、nical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 7, Equipment for harvesting and conservation. ISO 11520 consists of the following parts, under the general title Agricultural grain driers Determination of drying performance: ?Part 1: General ?Part 2: Ad
18、ditional procedures and crop-specific requirements Annexes C and D form a normative part of this part of ISO 11520. Annexes A, B and E are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Win
19、g, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 11520-2:2001(E) ISO 2001 All rights reservedv Introduction ISO 11520-1 covers only those methods for evaluating the drying performance of continuous-flow and batch grain driers
20、 to be used when drying rewetted wheat with a moisture content in the range 20 % to 15 % wet basis. The methods specified in this part of ISO 11520 take account of the following factors: ?a greater range in input and output moisture contents; ?other crops apart from wheat; ?the impracticality of rew
21、etting (dampening) some grains and of differing thermal characteristics. For correcting the observed evaporation rates to those to be expected at different reference ambient and specified grain conditions, the correction formulae given in ISO 11520-1 are augmented by a series of tables from which co
22、rrection factors are found by interpolation. The methods specified are for determining the water evaporation rate which the machines concerned are able to achieve when drying wheat and other grains under the steady-state conditions prevailing during the tests. Methods for correcting observed perform
23、ance to other input and reference ambient conditions are also specified. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted
24、 without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:25:37 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATI
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