IEC 62966-2:2020 is dedicated to aisle containment techniques for information technology (IT) equipment typically used in data centres, describes the quantification of its air tightness, in particular the air loss ratio that describes the content of the volumetric flow not used for cooling the IT equipment. This ratio provides an index of efficiency, being inversely proportional to efficiency (the lower this ratio, the higher the efficiency). This document provides methods to measure an aisle containment air leakage rate and defines a classification system for aisle containment leakage. This document defines: – the measurement of the air leakage of the individual components of an aisle containment; – a method for calculating the air leakage of an aisle containment based on its individual components; – a method for calculating the air leakage rate of an aisle containment in relation to the utilised IT equipment; – a classification system for aisle containment leakage.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Determination of the air leak rate 4.1 Determination of the air leak rate of the individual components of an aisle containment Figures Figure 1 \u2013 Example of the components \u2013 Roof <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.2 Components and system characteristic curves 4.2.1 General Figure 2 \u2013 Example of the components \u2013 Door Figure 3 \u2013 Example of the components \u2013 Enclosures <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.2.2 Equipment requirements 4.3 Measurement procedure 4.3.1 Measurement conditions 4.3.2 Preparing the elements of the test housing for measurement <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Figure 4 \u2013 Sealing the installation level Figure 5 \u2013 Example of a connecting design to the neighbouring enclosure <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.3.3 Measurement of the air leak rate Figure 6 \u2013 Example of a connecting design to the roof Figure 7 \u2013 Example of a connecting design to the end door <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.4 Test report 4.5 Measurement precision Figure 8 \u2013 Example of component and system characteristic curves <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5 Air leakage rate of the aisle containment \u2013 Creation of an overall system characteristic curve for the aisle containment 6 Determination of the air leak rate \u2013 Determination of the air leak rate of the overall system in operation, including the IT equipment Figure 9 \u2013 Example of a hydraulic addition of individual characteristic curves <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure 10 \u2013 Classification of aisle containment by class factors <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Annex A (informative)Aisle containments according to operation mode A.1 Allocation of the aisle containments according to operation mode A.1.1 General A.1.2 Types of climate control A.1.3 Closed-circuit climate control A.1.4 In-line climate control Figure A.1 \u2013 Example of an in-line climate control <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | A.2 Cold aisle containment A.2.1 Principle of the cold aisle containment A.2.2 Objective of the cold aisle A.2.3 Climate control A.3 Hot aisle containment A.3.1 Principle of the hot aisle containment Figure A.2 \u2013 Example of a cold aisle containment <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | A.3.2 Objective of the hot aisle A.3.3 Climate control A.4 Cold and hot aisle containment A.4.1 Principle of the cold and hot aisle containment Figure A.3 \u2013 Example of a hot aisle containment <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | A.4.2 Objective of the cold aisle in a cold and hot aisle containment A.4.3 Climate control Figure A.4 \u2013 Example of a cold and hot aisle containment <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Annex B (informative)Thermodynamic variables within aisle containments B.1 Air pressure B.1.1 General B.1.2 Minimum differential pressure B.1.3 Overpressure in hot aisle containments B.1.4 Negative pressure in hot aisle containments B.1.5 Overpressure in cold aisle containments B.1.6 Negative pressure in cold aisle containments <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | B.2 Directions of flow B.2.1 Directions of flow “from the front to the back” B.2.2 Direction of flow “to the side” B.3 Flow velocities B.3.1 Closed-circuit climate control B.3.2 In-line climate control B.3.3 Design of the aisle containments <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | B.4 Temperatures and humidity B.4.1 General B.4.2 Temperatures B.4.3 Humidity <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Mechanical structures for electrical and electronic equipment. Aisle containment for IT cabinets – Details of air flow, air separation and air cooling requirements<\/b><\/p>\n |