1、 ETSI EN 300 119-5 V1.2.2 (2004-12)European Standard (Telecommunications series) Environmental Engineering (EE);European telecommunication standardfor equipment practice;Part 5: Thermal managementETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 2 Reference DEN/EE-TMG002 Keywords environment, management, equi
2、pment practice, rack ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the p
3、resent document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In ca
4、se of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this a
5、nd other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authori
6、zed by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2004. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIP
7、HON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 3 Contents Intellectual Property Rights4 Foreword.4 In
8、troduction 4 1 Scope 5 2 References 5 3 Definitions and abbreviations.5 3.1 Definitions5 3.2 Abbreviations .6 4 General requirements .6 4.1 Thermal performance .6 4.2 Temperature of touchable parts 6 4.3 Temperature of issuing air6 5 Thermal management.6 5.1 Subrack air flow paths6 5.2 ARCM air flow
9、 paths .7 Annex A (normative): Equipment characterization data to be provided by the manufacturer8 A.1 General identification.8 A.1.1 Identification 8 A.1.2 Physical geometry 8 A.2 Equipment in natural convection9 A.2.1 Temperature measurements9 A.3 Equipment with built-in fans - forced convection9
10、A.3.1 Temperature and air velocity measurements 10 A.4 Additional data for an MRC and ancillary components.10 A.4.1 MRC.10 A.4.2 Fan tray.11 A.4.3 Fan tray flow and heat transfer.11 A.4.4 Air filter11 Annex B (informative): Bibliography.12 History 13 ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 4 Intelle
11、ctual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights
12、 (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR
13、searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications se
14、ries) has been produced by ETSI Technical Committee Environmental Engineering (EE). The present document is part 5 of a multi-part deliverable. Full details of the entire series can be found in part 1 3. The present document applies to all telecommunications rack/cabinet; miscellaneous rack/cabinets
15、 and subracks forming part of the public telecommunications network. National transposition dates Date of adoption of this EN: 10 December 2004 Date of latest announcement of this EN (doa): 31 March 2005 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 30 Septem
16、ber 2005 Date of withdrawal of any conflicting National Standard (dow): 30 September 2005 Introduction The power density of equipment has been rising and will continue to do so for the foreseeable future. Equipment suppliers have tried to overcome their thermal issues in isolation resulting in diffe
17、rent solutions being developed. When different racks from various suppliers are co-located they can have a detrimental effect on each other. The present document specifies the thermal management requirements to prevent equipment having a detrimental thermal influence on surrounding equipment. ETSI E
18、TSI EN 300 119-5 V1.2.2 (2004-12) 5 1 Scope The present document specifies the preferred thermal management solutions for subracks, racks/cabinets and miscellaneous racks/cabinets (as described in EN 300 119 series 5) installed indoors in restricted access locations (as defined in EN 60950-1 2), for
19、 the removal of heat dissipated by one or more subracks in an ETSI rack. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition numb
20、er or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference.
21、1 ETSI EN 300 019: “Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment“. 2 CENELEC EN 60950-1: “Information technology equipment - Safety - Part 1: General requirements“. 3 ETSI EN 300 119-1: “Environmental Engineering (EE); European tel
22、ecommunication standard for equipment practice; Part 1: Introduction and terminology“. 4 ETSI EN 300 019-1-3: “Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1-3: Classification of environmental conditions; Stationary use at we
23、atherprotected locations“. 5 ETSI EN 300 119: “Environmental Engineering (EE); European telecommunication standard for equipment practice“. 6 ETSI TR 102 489: “Environmental Engineering (EE); European telecommunications standard for equipment practice; Thermal Management Guidance for equipment and i
24、ts deployment“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: ambient: spatial maximal temperature of the air entering the rack/cabinet cabinet: free-standing and self-supporting enclosure for housing electrical a
25、nd/or electronic equipment NOTE: It is usually fitted with doors and/or panels, which may or may not be removable. equipment: for the purposes of EN 300 119-5, the term equipment shall mean equipped subracks, racks/cabinets and miscellaneous racks/cabinets integrator: end user/operator of telecommun
26、ication or IT equipment or their agent (for example, an equipment manufacturer could be an operators agent) ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 6 micro-climate: conditions found within the rack/cabinet creating a local ambient for the subrack NOTE: In practice this will typically result in eleva
27、ted temperatures and reduced relative humidities to those quoted in EN 300 019-1-3 4. miscellaneous rack/cabinet: accommodates subracks of several different types of equipment and suppliers and shall be freely configurable by the end user or their agent rack: free-standing or fixed structure for hou
28、sing electrical and/or electronic equipment 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ARCM Any Rack/Cabinet and Miscellaneous Rack/Cabinet MRC Miscellaneous Rack/Cabinet 4 General requirements 4.1 Thermal performance The supplier of the equipment
29、shall design the equipment so that the product fulfils the indoor environments as detailed in EN 300 019-1-3 4. On request, the supplier shall be able to provide, as a minimum, the information included in annex A. 4.2 Temperature of touchable parts Requirements for safety are outside the scope of th
30、e present document. For safety reasons it is important that the temperature rise of touchable parts are within guidelines to ensure the safety of personnel. Safety standards are published by CENELEC, for example a CENELEC product safety standard is EN 60950-1 2. Specifically see clause 4.5 “Thermal
31、Requirements“. 4.3 Temperature of issuing air If the air issuing from the equipment racks/cabinets under worst case conditions (maximum ambient temperature) can come into contact with equipment cables, the temperature of the air shall not exceed 75C. See CENELEC product safety standard EN 60950-1 2,
32、 specifically clause 4.5 “Thermal Requirements“, table 4b. 5 Thermal management It is a primary requirement for all equipment to be cooled by natural convection. The mechanical architecture of the ARCM shall be designed to promote natural convection. Assisted cooling methods should be employed only
33、when natural convection methods are unable to deal with the relevant heat dissipation. The terms left and right used in this clause are viewed from the front of the ARCM. 5.1 Subrack air flow paths The preferred air flow route into a subrack is in at the left, front or bottom and out at the right, b
34、ack or top. ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 7 5.2 ARCM air flow paths The preferred air flow route for an ARCM is air in at the front and air out of the top. If ventilated floor exists, the air inlet can be at the bottom. NOTE 1: The mixing of parallel and serial air flows within the same AR
35、CM is not preferred but may be implemented, see TR 102 489 6. NOTE 2: For subrack parallel air flows, methods shall be provided to prevent air mixing between subracks. NOTE 3: The performance of the various options may be compromised by removal/omission of ARCM covers and panels. NOTE 4: Care should
36、 be taken to ensure that the cabling does not adversely affect (restrict) the air flow. ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 8 Annex A (normative): Equipment characterization data to be provided by the manufacturer In many applications power dissipation from telecommunication systems has increase
37、d and it has become increasingly important that integrators have information available that enables them to predict the performance of the room ventilation system in delivering cooling to the equipment. In fact, the thermal performance of the facility is now becoming as critical as the thermal perfo
38、rmance of the ARCM and subrack. The data required by annex A should enable the integrator to review and revise the configuration of the facility and, where MRCs are used, review and revise the configuration within the MRC. To allow analysis of the likely performance, the following data shall be prov
39、ided to the integrators. The data required varies depending on the configuration being supplied/installed. Two configuration options are: a) equipment in natural convection; b) equipment in forced convection. Any thermal modelling to be undertaken using this data will require geometric information a
40、s well as airflow and thermal data. Therefore the data includes geometric information identified elsewhere in the mechanical standard so that this represents a complete list. This duplicate geometric information is shown in italics in recognition of the duplication. The recommended environmental tes
41、t conditions should be within the range as specified for the EN 300 019 series 1. The actual environmental test conditions used for collection of data shall be provided with the characterization data. A.1 General identification All ARCMs and rack mounted equipment characterized for thermal managemen
42、t purposes shall have the following identification and physical geometry characteristics specified. A.1.1 Identification Manufacturer. Model. A.1.2 Physical geometry The size and geometry of the equipment: Size: - height; - width; - depth. In addition to the general identification and physical size,
43、 described in this clause, equipment should have the following information defined such that its effect on airflow and heat transfer can be determined. Equipment can be considered as a rectangular volume containing elements that restrict airflow and dissipate heat. The data supplied will characteriz
44、e the airflow rate and consequent temperature rise for the equipment in free space. ETSI ETSI EN 300 119-5 V1.2.2 (2004-12) 9 A.2 Equipment in natural convection For equipment in natural convection the following data shall be provided to the operators or their agents: The total power dissipation for
45、 the maximum load configuration. The temperature rise for the maximum load configuration. Where the airflow or temperature is substantially non-uniform from one outlet to another then the supplier shall provide the temperature rise for each outlet. The size, position and porosity of the vents/grids.
46、 If the faces of the equipment are essentially open, then the vent size will be the size of that face of the equipment with the porosity being 100 % or a free area ratio of 1,0. A description of the vent type shall also be given from the following list: Open. Perforated. Slotted. Grille. Mesh. An ai
47、rflow characterization capturing the generic nature of the flow regime shall be given to generically identify faces of the equipment that can have inflow or outflow. For example, for a piece of equipment that complies with the present document this shall be “Front in, top out“. Where the equipment i
48、s sealed so that heat is lost only by surface convection, conduction and radiation then the type shall be “None“. NOTE 1: Where an operator/end user wishes to use a model of the equipment for thermal simulation a model may be calibrated (the resistance to flow adjusted) to match the temperature and
49、power data provided. NOTE 2: Where there is no power dissipation then the porosity of the equipment shall be given. A.2.1 Temperature measurements The air temperature leaving the equipment shall be quoted for a measurement in the centre of the face 10 mm away from each open face. NOTE: It is not necessary to provide the air velocity for natural convection; however, the data may be quoted in order to give greater understanding of the performance. A.3 Equipment with built-in fans - forced convection An item of equipmen
