AS 1731-12-2003 Refrigerated display cabinets Part 12 Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet.pdf
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1、 AS 1731.122003 Australian Standard Refrigerated display cabinets Part 12: Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet AS 1731.12 This Australian Standard was prepared by Committee ME-008, Refrigerated Display Cabinets. It was approved
2、on behalf of the Council of Standards Australia on 26 September 2003 and published on 1 October 2003. The following are represented on Committee ME-008: Australian Greenhouse Office Australian Retailers Association Commercial Refrigeration Manufacturers Association of Australia Food Science Australi
3、a Institution of Engineers Australia Refrigeration Air Conditioning Companies Association Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are p
4、ublished. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about Stan
5、dards can be found by visiting the Standards Australia web site at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisio
6、ns and amendments published each month. We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at .au, or write to the Chief Executive, Standards Australia International
7、 Ltd, GPO Box 5420, Sydney, NSW 2001. This Standard was issued in draft form for comment as DR 03217. The Standard is downloaded from Standard Sharing AS 1731.122003 Australian Standard Refrigerated display cabinets Part 12: Measurement of the heat extraction rate of the cabinets when the condensin
8、g unit is remote from the cabinet Originated as AS B2201966. Previous edition AS 1731.122000. Second edition 2003. COPYRIGHT Standards Australia International All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including ph
9、otocopying, without the written permission of the publisher. Published by Standards Australia International Ltd GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0 7337 5536 4 AS 1731.122003 2 PREFACE This Standard was prepared by the Australian members of the Joint Standards Australia/Standard New Zea
10、land Committee ME-008, Refrigerated Display Cabinets, to supersede AS 1731.122000, Refrigerated display cabinets, Part 12: Measurement of the heat extraction rate of cabinets when the condensing unit is remote from the cabinet. After consultation with stakeholders in both countries, Standards Austra
11、lia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. This Standard is based on International Standard prEN ISO 23953-2:2003, Refrigerated display cabinets, Part 2: Classification, requirements and test conditions. This Stand
12、ard is Part 12 of a series of Standards for refrigerated display cabinets, as follows: AS 1731 Refrigerated display cabinets 1731.1 Part 1: Terms and definitions 1731.2 Part 2: General mechanical and physical requirements 1731.3 Part 3: Linear dimensions, areas and volumes 1731.4 Part 4: General tes
13、t conditions 1731.5 Part 5: Temperature test 1731.6 Part 6: Classification according to temperatures 1731.7 Part 7: Defrosting test 1731.8 Part 8: Water vapour condensation test 1731.9 Part 9: Electrical energy consumption test 1731.10 Part 10: Test for absence of odour and taste 1731.11 Part 11: In
14、stallation, maintenance and user guide 1731.12 Part 12: Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet (this Standard) 1731.13 Part 13: Test report 1731.14 Part 14: Minimum energy performance standard (MEPS) requirements The Standard is do
15、wnloaded from Standard Sharing 3 AS 1731.122003 CONTENTS Page 1 SCOPE4 2 REFERENCED DOCUMENTS4 3 OBJECTIVE .4 4 TEST PROCEDURE.4 5 DETERMINATION OF HEAT EXTRACTION RATE6 6 METHOD .11 7 TEST REPORT.17 AS 1731.122003 4 Standards Australia .au STANDARDS AUSTRALIA Australian Standard Refrigerated displ
16、ay cabinets Part 12: Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet 1 SCOPE 1.1 Scope of Standard This Standard specifies terminology, general mechanical and physical requirements, test conditions as well as installation and maintenance, i
17、ncluding a users guide, for refrigerated display cabinets for the sale or display, or both, of food products. This Standard does not cover refrigerated vending machines, cabinets intended for use in catering and similar non-retail applications or food service cabinets. 1.2 Scope of Part 12 This Part
18、 of AS 1731 specifies heat extraction rate measurements and conditions for refrigerated display cabinets when the condensing unit is remote from the cabinet and used with compression-type or indirect-type refrigerating system. 2 REFERENCED DOCUMENTS The following documents are referred to in this St
19、andard: AS 1731 Refrigerated display cabinets 1731.4 Part 4: General test conditions 1731.5 Part 5: Temperature test 1731.13 Part 13: Test report AS/NZS 1677 Refrigerating systems 1677.1 Part 1: Refrigerant classification 3 OBJECTIVE The objective of this Standard is to establish a procedure for the
20、 measurement of the heat extraction rate of remote and indirect refrigerating systems for use by manufacturers, suppliers, purchasers, operators and regulators of these systems. 4 TEST PROCEDURE 4.1 General test conditions The cabinet shall be installed in the test room and the test shall be prepare
21、d and carried out during the temperature test, in accordance with AS 1731.4 and AS 1731.5. The condensing unit shall be connected to the cabinet in accordance with Clauses 4.2 or 4.3 and the operating controls set to the manufacturers instructions. The Standard is downloaded from Standard Sharing 5
22、 AS 1731.122003 .au Standards Australia The refrigerant inlet and outlet temperatures shall be measured using temperature sensors. The sensors shall be directly inserted into the pipe or pockets, or clamped between the piping and a copper recovery half-sleeve on the inlet and outlet pipelines positi
23、oned no further than 150 mm from the cabinet exterior (see Figures 1 and 3). Where thermocouples or similar devices are utilized, the sensor cables shall be arranged such that external influences on the connection cables are eliminated by the use of insulation. Temperature sensors, connecting wires
24、and pipelines shall be insulated from the outlet of the cabinet up to at least 150 mm beyond the measuring points. A flow measuring device (flow meter) shall be installed in the liquid inlet supply line to the cabinet, in order to measure the liquid mass flow or volume flow rate of refrigerant. A li
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