BS EN 50600-4-7:2020 pdf free.Information technology – Data centre facilities and infrastructures.Cooling Efficiency Ratio.
BS EN 50600-4-7 This document specifies the Cooling Efficiency Ratio (CER) as a Key Performance Indicator (KPI) to quantify the efficient use of energy to control the temperature of the spaces within the data centre. This document: a) defines the Cooling Efficiency Ratio (CER) of a data centre; b) describes the relationship of this KPI to a data centre’s infrastructure, information technology equipment and information technology operations;c) defines the measurement, the calculation and the reporting of the parameter; d) provides information on the correct interpretation of the CER.Annex A describes the correlation of CER and other KPIs.Annex B provides examples of the application of CER.Annex C introduces the parameters that affect CER. Annex D describes requirements and recommendations for derivatives of KPIs associated with CER.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.EN 50600-1, Information technology – Data centre facilities and infrastructures – Part 1: General concepts EN 50600-4-1, Information technology – Data centre facilities and infrastructures – Part 4-1: Overview of and general requirements for key performance indicators.Calculation of PUE for data centres located in multi-purpose can be a challenge, when parts of the infrastructure are shared between the data centre and e.g. the office building. Separating electrical energy use can be easily arranged with sub-meters in the power trail. When the offices are equipped with UPS secured sockets, UPS losses need to be split up for offices and data centre. This can be accomplished by determination of the UPS loss with a meter before the UPS and meters on every line behind the UPS. For a large data centre in a small office building the loss attributed to the offices may even be ignored.The major challenge is to account for the electrical energy for cooling when the cooling infrastructure is shared between data centre and offices as shown schematically in Figure 2. In most cases, the piping system is not separated between data centre and offices. Therefore, the heat loads of data centre and offices cannot be separated and measured. In addition, the heat load in offices strongly depends on the weather conditions and thus is much more variable than the heat load of the data centre.BS EN 50600-4-7 pdf download.