1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T L.1302 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2015) SERIES L: ENVIRONMENT AND ICTS, CLIMATE CHANGE, E-WASTE, ENERGY EFFICIENCY; CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE
2、PLANT Assessment of energy efficiency on infrastructure in data centres and telecom centres Recommendation ITU-T L.1302 Rec. ITU-T L.1302 (11/2015) i Recommendation ITU-T L.1302 Assessment of energy efficiency on infrastructure in data centres and telecom centres Summary Recommendation ITU-T L.1302
3、specifies an energy efficiency assessment methodology for data centres and telecom centres, test equipment accuracy requirements, assessment period, assessment conditions and calculation methods. Concerning the data centres and telecom centres, the Recommendation considers assessment methods for the
4、 efficiency of the whole data centre/telecom centre and of a part of the data centre/telecom centre. As the main energy-consuming infrastructure in data centres and telecom centres are the power feeding system (power supply system) and the cooling system, this Recommendation covers energy efficiency
5、 measurement methodologies for both types of systems. The Recommendation takes into account methodologies and best practices currently in use or under development in networks, and data centres and telecom centres. This Recommendation is aimed at reducing the negative impact of data centres and telec
6、om centres through by providing methodologies for energy efficiency assessment. It is commonly recognized that data centres and telecom centres will have an ever-increasing impact on the environment in the future. The application of the assessment methods defined in this Recommendation can help owne
7、rs and managers to build future data centres and telecom centres, or improve existing ones, that will operate in an environmentally responsible manner. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T L.1302 2015-11-29 5 11.1002/1000/12630 Keywords Cooling system, data centre
8、, energy efficiency, power feeding system, telecom centre. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T L.1302 (11/2015) F
9、OREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for study
10、ing technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study group
11、s which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS
12、O and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provision
13、s (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such
14、words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position c
15、oncerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected b
16、y patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this
17、 publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T L.1302 (11/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acr
18、onyms 2 5 Conventions 2 6 Architecture of data centre or telecom centre energy consumption . 2 7 Whole data centre and telecom centre energy efficiency measurement methodology . 3 7.1 Test instrument requirements . 3 7.2 Assessment period and frequency 3 7.3 Assessment conditions 4 7.4 Measurement m
19、ethods 4 7.5 Energy efficiency measurement points and calculation methods . 4 7.6 Partial data centre and telecom centre energy efficiency . 6 8 Power feeding system energy efficiency measurement methodology 8 8.1 Test instrument requirements . 8 8.2 Assessment period and frequency 9 8.3 Assessment
20、conditions 9 8.4 Measurement methods 9 8.5 Energy efficiency measurement points and calculation methods . 9 9 Cooling system energy efficiency measurement methodology 10 9.1 Test instrument requirements . 10 9.2 Assessment period and frequency 10 9.3 Assessment conditions 11 9.4 Measurement methods
21、11 9.5 Energy efficiency measurement points and calculation methods . 11 Bibliography. 13 Rec. ITU-T L.1302 (11/2015) 1 Recommendation ITU-T L.1302 Assessment of energy efficiency on infrastructure in data centre and telecom centre 1 Scope This Recommendation specifies an energy efficiency assessmen
22、t methodology of the infrastructure of data centres and telecom centres under running conditions. The assessment methodology includes an assessment methodology of the energy efficiency for the whole data centre/telecom centre infrastructure (or facility), for a partial data centre/telecom centre inf
23、rastructure (or facility), for the power feeding system and for the cooling system. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions i
24、ndicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-
25、T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T L.1200 Recommendation ITU-T L.1200 (2012), Direct current power feeding interface up to 400 V at the input to telecommun
26、ication and ICT equipment. ITU-T L.1201 Recommendation ITU-T L.1201 (2014), Architecture of power feeding systems of up to 400 VDC. ITU-T L.1202 Recommendation ITU-T L.1202 (2015), Methodologies for evaluating the performance of up to 400 VDC power feeding system and its environmental impact. ITU-T
27、L.1300 Recommendation ITU-T L.1300 (2014), Best practices for green data centres. ITU-T L.1320 Recommendation ITU-T L.1320 (2014), Energy efficiency metrics and measurement for power and cooling equipment for telecommunications and data centres. IEC 60038 IEC 60038:2009, IEC Standard Voltages. 3 Def
28、initions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 energy b-ISO 16818: Capacity for doing work; having several forms that may be transformed from one to another, such as thermal (heat), mechanical (work), electrical or chemical, and is expresse
29、d in Joule. For the purpose of this Recommendation, energy will be expressed in Watt-hours (Wh) or kilo Watt-hours (kWh). 3.1.2 power b-ISO 16818: Rate at which energy is transmitted. 2 Rec. ITU-T L.1302 (11/2015) 3.1.3 PUE b-ISO/IEC 30134-2: Ratio of the data centre total energy consumption to info
30、rmation technology equipment energy consumption, calculated, measured or assessed across the same period. 3.1.4 pPUE b-ISO/IEC 30134-2: Derivative of PUE, which is the ratio of the total energy consumption within a defined boundary to the information technology equipment energy consumption 3.2 Terms
31、 defined in this Recommendation This Recommendation defines the following terms: 3.2.1 infrastructure (facility): Equipment that supports information and communication technology (ICT) equipment, e.g., power delivery components and cooling system components. 3.2.2 ICT equipment: Information and comm
32、unication equipment (e.g., computing, storage and network equipment) used in data centres. 3.2.3 power feeding system: Power source to which information and communication technology (ICT) equipment and facilities are intended to be connected, such as an UPS, a backup generator, etc. 4 Abbreviations
33、and acronyms This Recommendation uses the following abbreviations and acronyms: AC Alternating Current CLF Cooling Load Factor DC Direct Current EER Energy Efficiency Ratio HV High Voltage IT Information Technology LV Low Voltage MV Medium Voltage pCLF partial Cooling Load Factor PDU Power Distribut
34、ion Unit PLF Power Load Factor PUE Power Usage Effectiveness UPS Uninterruptible Power Supply 5 Conventions None. 6 Architecture of data centre or telecom centre energy consumption The architecture of data centres and telecom centres is illustrated in Figure 1. Rec. ITU-T L.1302 (11/2015) 3 Figure 1
35、 Example of the architecture of a data centre energy consumption Input energy: Grid, generator or any other source of energy. AC power distribution system: High voltage or medium voltage distribution, transformer, power distribution cabinet, distribution cable, cooling system power distribution, saf
36、ety power distribution, illumination power distribution, array cabinet, IT equipment cabinet power distribution, etc. Uninterruptible Power Supply (UPS) system: UPS equipment and battery strings, etc. Up to 400 V DC system: Up to 400 V DC equipment and battery strings, etc. Cooling system: Air condi
37、tioner (including indoor and outdoor equipment), cooling tower, pump, outdoor air equipment, heat exchanging equipment, etc. Other equipment: illumination equipment, safety equipment, anti-fire equipment, sensors, monitoring system, etc. The energy saving scheme mentioned in ITU-T L.1300 should be a
38、pplied as much as possible in data centres and telecom centres to reduce the negative impact of data centres and telecom centres on climate. 7 Whole data centre and telecom centre energy efficiency measurement methodology 7.1 Test instrument requirements The accuracy of the testing equipment shall c
39、omply with the following requirements: Item Accuracy Temperature 0.5C +0.5C Humidity 5.0% +5.0% Voltage 1.0% +1.0% Current 1.0% +1.0% Power 3.0% +3.0% Energy Class 1 NOTE Class 1 is for energy measurement accuracy and should refer to IEC 62053-21 class 1. 7.2 Assessment period and frequency 1) Asses
40、sment period The assessment period should be of twelve months, considering that the cooling system energy efficiency varies according to the outside temperature. The power feeding system energy efficiency also differs depending on the load rate. 4 Rec. ITU-T L.1302 (11/2015) If the assessment period
41、 is not of twelve months, a justification of the assessment period used is required and should be documented in the final report. 2) Assessment frequency Continuous measurement is needed, and energy consumption is required to be measured at least every 30 minutes. Given the conditions, if assessment
42、 is done in a discontinuous way, it should be done in accordance with the following requirements: In the case of discontinuous measurement, energy consumption should be measured at least every 30 minutes, and assessment should be done at least once every hour. In addition, assessment should be done
43、at least twice per day at least three days in one month. If discontinuous measurement is being applied, justification of assessment frequency needs to be provided. 7.3 Assessment conditions The assessment should cover whole year running conditions. If using discontinuous methods, it should be in acc
44、ordance with following requirements: 1) Load conditions The assessment should cover busy hours and idle hours, so that it is done on different load conditions. 2) Environmental conditions The assessment should cover all seasons, so that it is done under different environmental conditions. 7.4 Measur
45、ement methods Measurements of energy consumption and energy efficiency should be carried out once the whole data centre/telecom centre has reached a stable operation state. The normal operation of the data centre or telecom centre should not be affected by the energy efficiency assessment activities
46、. The power meter should be installed after data centre/telecom centre has been put in operation. Measuring voltage clamps and current probes should be used to avoid affecting the operation. The power meter used should comply with clause 7.1. The assessment period and frequency should be in accordan
47、ce with clause 7.2. The assessment conditions should be in accordance with clause 7.3. As energy consumption and energy efficiency in the data centre/telecom centre are affected by environmental and load conditions, including room and outside temperature, room and outside humidity and load rate, the
48、se conditions and parameters need to be documented in the energy efficiency report. The measurement points and calculation of energy efficiency should be accordance with clause 7.5 of this Recommendation. 7.5 Energy efficiency measurement points and calculation methods The power input of data centre
49、s and telecom centres can be high voltage (HV), medium voltage (MV) or low voltage (LV). Different types of data centre and telecom centre for the measurement of the whole energy efficiency are shown in Figure 2 and Figure 3. 1) High voltage/medium voltage input data centre and telecom centre structure Rec. ITU-T L.1302 (11/2015) 5 NOTE 1 Dotted lines indicate that the connection is optional. NOTE 2 Definition of HV/MV should be in accordance with IEC 60038. Figure 2 Example of HV/MV input data centre/telecom centre energy
