{"id":19702,"date":"2024-06-18T12:44:32","date_gmt":"2024-06-18T10:44:32","guid":{"rendered":"https:\/\/mag.ebmpapst.com\/en\/?p=19702"},"modified":"2025-08-19T14:36:55","modified_gmt":"2025-08-19T12:36:55","slug":"fans-for-data-centers-air-conditioning-cooling","status":"publish","type":"post","link":"https:\/\/mag.ebmpapst.com\/en\/industries\/refrigeration-ventilation\/fans-for-data-centers-air-conditioning-cooling_19702\/","title":{"rendered":"Fans for data centers: cool servers mean secure data"},"content":{"rendered":"\n<p>One of the most impor\u00adtant tasks of any data center oper\u00adator is to monitor and control climatic condi\u00adtions in server rooms, as high temper\u00ada\u00adtures and humidity damage the IT devices and result in fail\u00adures. Air condi\u00adtioning concepts have to coun\u00adteract this. Different solu\u00adtions are used here, as no two data centers are the same in terms of the way they are constructed (Fig. 1). <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"378\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-660x378.jpg\" alt class=\"wp-image-19707\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-660x378.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-960x550.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-260x149.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-1536x880.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-450x258.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances-300x172.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Fig_1_Datacenter-appliances.jpg 1920w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\"><figcaption class=\"wp-element-caption\">Fig. 1: One of the most impor\u00adtant tasks of any data center oper\u00adator is to monitor and control the indoor climate. Different solu\u00adtions are used here, as no two data centers are the same in terms of the way they are constructed. (Graphic | ebm-papst)<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Typical cooling appli\u00adca\u00adtions range from in-row cooling of the server racks to chillers, preci\u00adsion air-condi\u00adtioning units and other air handling units (AHUs). ebm-papst has a number of suit\u00adable EC axial and centrifugal fans designed to meet the require\u00adments in data centers for these different air-condi\u00adtioning solu\u00adtions.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull mgznkr-cta-retrofit-banner\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<style>\n.mgznkr-cta-retrofit-banner .alignwide.banner-width {\n  max-width: 100%;\n  width: 1240px;\n  margin: 0 auto;\n--mark-bgcolor: #00a633;\n--mark-color: white;\n}\n@media (max-width: 781px) {\n.mgznkr-cta-retrofit-banner .wp-block-cover .wp-block-cover__image-background {\nobject-position: 17% 50%!important;\n}\n\n.mgznkr-column-spacer p {display: none; }\n}\n@media (min-width: 782px) {\n.mgznkr-column-spacer p a {\n  min-height: 290px;\n  min-width: 100%;\n  display: block;\n  border-radius: 50px;\nfont-size: 0;\n}\n}\n\n.mgznkr-cta-retrofit-banner .wp-block-columns .wp-block-column:first-of-type{\n    position:relative;\n}\n.mgznkr-cta-retrofit-banner .wp-block-columns .wp-block-column:first-of-type::before {\n    content: \"\";\n    position: absolute;\n    width: 170%;\n    height: 100%;\n    background: #a2b91e;\n    z-index: 0;\n    top: 0;\n    left: 0;\n}\n.mgznkr-cta-retrofit-banner .wp-block-column{\n    z-index: 10;\n    &:first-of-type{\n        padding-left: 4rem;\n    }\n}\n.mgznkr-cta-retrofit-banner .wp-block-column *{\nposition: relative;\nz-index: 10;\n}\n.mgznkr-cta-retrofit-banner .wp-block-column figure.wp-block-image{\n    margin-bottom: 0;\n}\n@media (width < 782px){\n.mgznkr-cta-retrofit-banner .mgznkr-mobile-hidden{\ndisplay: none;\n}\n.mgznkr-cta-retrofit-banner .wp-block-columns .wp-block-column:first-of-type{\n  padding-right: 4rem;\n}\n.mgznkr-cta-retrofit-banner .wp-block-columns .wp-block-column:first-of-type::before {\n  width: 100%;\n}\n}\n\n<\/style>\n\n\n\n<div style=\"height:32px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-cover\" style=\"min-height:350px;aspect-ratio:unset;\"><img decoding=\"async\" class=\"wp-block-cover__image-background wp-image-38370 size-large\" alt src=\"https:\/\/ebmpapst-7237.kxcdn.com\/de\/files\/2025\/08\/L2A-Awareness-Campaign-960x400.webp\" data-object-fit=\"cover\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-0 has-background-dim\" style=\"background-color:#e0e6e6\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div class=\"wp-block-columns alignwide banner-width is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<h2 class=\"wp-block-heading mgznkr-click has-white-color has-text-color has-link-color wp-elements-9c437f00d7951dd60554c7a2708cd1c5\" id=\"retrofit-banner-head\" style=\"font-size:1.6em;text-transform:uppercase\"><a href=\"https:\/\/www.ebmpapst.com\/de\/en\/campaigns\/industry-campaigns\/data-center.html#cooling-solutions\" target=\"_blank\" rel=\"noreferrer noopener\">High perfor\u00admance, low carbon:<\/a><\/h2>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>ebm-papst reimag\u00adines data center cooling. Our effi\u00adcient cooling solu\u00adtions combine energy effi\u00adciency with high power density.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill mgznkr-click\" id=\"retrofit-banner-button\"><a class=\"wp-block-button__link has-background has-custom-font-size wp-element-button\" href=\"https:\/\/www.ebmpapst.com\/de\/en\/campaigns\/industry-campaigns\/data-center.html#cooling-solutions\" style=\"background-color:#0072bb;font-size:18px\" target=\"_blank\" rel=\"noreferrer noopener\">Ensure reli\u00adable cooling now <i class=\"mgznkr-icon fa fa-chevron-right fas\"><\/i><\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-bottom mgznkr-column-spacer mgznkr-mobile-hidden is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/de\/files\/2025\/08\/L2A-Awareness-Campaign-00-scaled.webp\" alt class=\"wp-image-38386\" style=\"object-fit:cover\"><\/figure>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:36px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group mgznkr-elements mgznkr-box\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">A real-life example: NTT Global Data Center<\/h3>\n\n\n\n<p>NTT Global Data Centers EMEA GmbH is one of the <strong>world\u2019s leading IT service providers <\/strong>with four data center loca\u00adtions in Frank\u00adfurt alone. The <strong>Frank\u00adfurt 1 data center campus<\/strong>, for example, is one of the largest data center sites in Europe, with around 50,000 square meters of IT space (Fig. 6) featuring preci\u00adsion air-condi\u00adtioning units providing cooling. The units draw in exhaust air at a temper\u00ada\u00adture of around 36 to 39\u00b0C, filter, cool, and humidify it, then direct the air, which has been cooled to 23 to 24\u00b0C, through a raised floor and outlets directly to the server racks. <strong>Three EC centrifugal fans<\/strong> from the ebm-papst RadiPac series are respon\u00adsible for contin\u00adu\u00adously conveying air in each air condi\u00adtioner<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"371\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-660x371.jpg\" alt class=\"wp-image-19710\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-660x371.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-960x540.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-260x146.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-1536x864.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-450x253.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080-300x169.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/NTT-DataCenter_outside_1920x1080.jpg 1920w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\"><figcaption class=\"wp-element-caption\">Foto: NTT Global Data Center EMEA GmbH<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n\n\n<p>In total, these fans have been in oper\u00ada\u00adtion in Frank\u00adfurt 1 for almost 10 years. There is one special thing to note here, though: the standby preci\u00adsion air-condi\u00adtioning units are not only provided for redun\u00addancy reasons, they also always run at low speed in parallel. This increases both the service life of the fans and their effi\u00adciency. <\/p>\n\n\n\n<p>Thanks to precise differ\u00aden\u00adtial pres\u00adsure control in the range of four to six pascals, the fan speed of all air condi\u00adtioners auto\u00admat\u00adi\u00adcally adjusts when a preci\u00adsion air-condi\u00adtioning unit fails or if the server perfor\u00admance changes dynam\u00adi\u00adcally. As a result, all the fans consume an impres\u00adsive 30 percent less power, thereby playing their role in ensuring a good EER value, which indi\u00adcates the cooling capacity of an air condi\u00adtioner compared to the current consump\u00adtion.<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Axial fans: quiet and suit\u00adable for high back pres\u00adsure<\/h2>\n\n\n\n<p>Data centers are increas\u00adingly moving closer to both indus\u00adtrial and resi\u00adden\u00adtial areas in order to keep data cables short and there\u00adfore as inter\u00adfer\u00adence-free as possible. This has conse\u00adquences for the oper\u00ada\u00adtors, as the large chillers, dry coolers, or condensers have to comply with the applic\u00adable noise protec\u00adtion regu\u00adla\u00adtions in the rele\u00advant area. For the fans used, this means two things. Firstly, they them\u00adselves must operate as quietly as possible and not cause any unpleasant noise. And secondly, they must also cope with higher back pres\u00adsure if the air condi\u00adtioners require addi\u00adtional noise protec\u00adtion measures, for example because the compressor would other\u00adwise be too loud. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"334\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-660x334.jpg\" alt class=\"wp-image-19714\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-660x334.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-960x486.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-260x131.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-1536x777.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-450x228.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1-300x152.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_2_AxiEco-AxiBlade-Kennlinie-1.jpg 1920w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\"><figcaption class=\"wp-element-caption\">Fig. 2: The AxiEco (A and B) series is primarily used in appli\u00adca\u00adtions where a high pres\u00adsure increase is required, while the AxiBlade (C and D) axial fans offer an impres\u00adsive combi\u00adna\u00adtion of high power density and low noise emis\u00adsions. (Graphic | ebm-papst)<\/figcaption><\/figure>\n<\/div>\n\n\n<p>AxiBlade and AxiEco are two axial fan series that cover the different require\u00adments here (Fig. 2). The first boasts a high power density with low noise emis\u00adsions, while the second series is partic\u00adu\u00adlarly suit\u00adable for appli\u00adca\u00adtions requiring an espe\u00adcially high pres\u00adsure increase, for example due to addi\u00adtional noise protec\u00adtion measures or special exchanger geome\u00adtries.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Centrifugal fans: high power density and wide optimum effi\u00adciency range<\/h2>\n\n\n\n<p>Centrifugal fans are also typi\u00adcally used in data centers. During the devel\u00adop\u00adment of RadiPac centrifugal fans, for example, the actual instal\u00adla\u00adtion situ\u00ada\u00adtion in computer room air handlers (CRAH) and AHUs was taken into account. Specif\u00adi\u00adcally, the outflow char\u00adac\u00adter\u00adis\u00adtics of the impeller were opti\u00admized and both deflec\u00adtion losses in the air handling unit and outlet losses were reduced thanks to a special design. As a result, the fans can run at a lower speed at the same oper\u00adating point, which in turn enables energy savings (Fig. 3). Thanks to a wide optimum effi\u00adciency range and a high static overall effi\u00adciency level, the fans operate with low power consump\u00adtion in a broad range of oper\u00adating condi\u00adtions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"484\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-960x484.jpg\" alt class=\"wp-image-19713\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-960x484.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-660x332.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-260x131.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-1536x774.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-450x227.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1-300x151.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_3_Industriedach_RadiPac-1.jpg 1920w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\"><figcaption class=\"wp-element-caption\">Fig. 3: The actual instal\u00adla\u00adtion situ\u00ada\u00adtion in computer room air handlers (CRAH) and air handling units (AHUs) was taken into account when devel\u00adoping RadiPac centrifugal fans. (Graphic | ebm-papst)<\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-group article-sidebox\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<figure class=\"wp-block-image size-full img-border\"><a href=\"https:\/\/mag.ebmpapst.com\/en\/industries\/refrigeration-ventilation\/what-the-tech-how-do-you-keep-data-centers-cool_16673\/\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/de\/files\/2022\/12\/wtt-16.jpg\" alt class=\"wp-image-26482\"><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">How do you keep data centers cool?<\/h3>\n\n\n\n<p>Learn more in our What The Tech?! video.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-custom-font-size wp-element-button\" href=\"https:\/\/mag.ebmpapst.com\/en\/industries\/refrigeration-ventilation\/what-the-tech-how-do-you-keep-data-centers-cool_16673\/\" style=\"font-size:18px\" target=\"_blank\" rel=\"noreferrer noopener\">Watch it here <i class=\"mgznkr-icon fa fa-chevron-right fas\"><\/i><\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Increased oper\u00ada\u00adtional reli\u00ada\u00adbility thanks to reso\u00adnance detec\u00adtion<\/h2>\n\n\n\n<p>Fans are used in a wide range of appli\u00adca\u00adtions in data centers. Depending on the instal\u00adla\u00adtion situ\u00ada\u00adtion, reso\u00adnance can occur in unpre\u00addictable speed ranges. If the fan is often oper\u00adated in such crit\u00adical ranges, the bearing system may be damaged, leading to prema\u00adture fan failure. Although these vibra\u00adtions can be measured by system oper\u00ada\u00adtors, they cannot simply be elim\u00adi\u00adnated. ebm-papst solves this problem with auto\u00admatic reso\u00adnance detec\u00adtion, which prevents fans from oper\u00adating at crit\u00adical speeds, increasing their service life and oper\u00ada\u00adtional reli\u00ada\u00adbility. <\/p>\n\n\n\n<p>For this purpose, a test start-up can be performed during commis\u00adsioning in which the vibra\u00adtion speed is analyzed over the entire speed progres\u00adsion from stand\u00adstill to nominal speed. If exces\u00adsive vibra\u00adtion speeds are detected in certain ranges, the control soft\u00adware adjusts itself after acti\u00adva\u00adtion by the customer so that these speed ranges are \"passed over\" in the future. This means that the ranges are passed through, but contin\u00aduous oper\u00ada\u00adtion in them is avoided (Fig. 4). <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"660\" height=\"291\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-660x291.jpg\" alt class=\"wp-image-19715\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-660x291.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-960x424.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-260x115.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-1536x678.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-450x199.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN-300x132.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_4_Schwingschnelle_300EN.jpg 1920w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\"><figcaption class=\"wp-element-caption\">Fig. 4: Auto\u00admatic reso\u00adnance detec\u00adtion prevents fans from oper\u00adating at crit\u00adical speeds, thereby increasing their service life and oper\u00ada\u00adtional reli\u00ada\u00adbility. (Graphic | ebm-papst)<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Oper\u00ada\u00adtors can manu\u00adally edit the soft\u00adware settings at any time, meaning that they always have full control.&nbsp;The inte\u00adgrated vibra\u00adtion sensor can also be used for condi\u00adtion moni\u00adtoring, which enables preven\u00adtive main\u00adte\u00adnance and service assign\u00adments to be better planned.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Active \u201cPower Factor Correc\u00adtion\u201d mini\u00admizes circuit feed\u00adback<\/h2>\n\n\n\n<p>Speed control is manda\u00adtory for demand-based air condi\u00adtioning. However, the oper\u00ada\u00adtion of speed-controlled drives always gener\u00adates current harmonics, which can become prob\u00adlem\u00adatic in crit\u00adical infra\u00adstruc\u00adtures when combined with an inad\u00ade\u00adquately dimen\u00adsioned power supply. The resulting harmonics lead to an increased load on the supply network and to losses due to reac\u00adtive power. There may also be a nega\u00adtive impact on other devices in the system network. In the past this used to mean that oper\u00ada\u00adtors had to fit external filters, ensure adequate power factor correc\u00adtion, and possibly make use of larger cable cross-sections.<\/p>\n\n\n\n<p>These kinds of external measures are now no longer required. To mini\u00admize the problem of harmonics with the parallel oper\u00ada\u00adtion of EC fans, ebm-papst has come up with a solu\u00adtion where the harmonic filter is already inte\u00adgrated: namely, active PFC (Power Factor Correc\u00adtion (fig. 5)). <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"550\" src=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-960x550.jpg\" alt class=\"wp-image-19705\" srcset=\"https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-960x550.jpg 960w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-660x378.jpg 660w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-260x149.jpg 260w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-1536x880.jpg 1536w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-450x258.jpg 450w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC-300x172.jpg 300w, https:\/\/ebmpapst-7237.kxcdn.com\/en\/files\/2024\/05\/ebm-papst_datacenter_Bild_5_Aktiv_PFC.jpg 1920w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\"><figcaption class=\"wp-element-caption\">Fig. 5: Active PFC (Power Factor Correc\u00adtion) takes the approach of preventing current harmonics from occur\u00adring at all instead of labo\u00adri\u00adously filtering them out after\u00adwards with addi\u00adtional compo\u00adnents. (Graphic | ebm-papst)<\/figcaption><\/figure>\n\n\n\n<p>The approach is to prevent current harmonics from occur\u00adring at all instead of labo\u00adri\u00adously filtering them out after\u00adwards with addi\u00adtional compo\u00adnents. This allows infra\u00adstruc\u00adture compo\u00adnents for energy and emer\u00adgency power supply, such as trans\u00adformers and emer\u00adgency power gener\u00ada\u00adtors, to be designed to be smaller, making them more cost-effec\u00adtive. The results that can be achieved with active PFC are remark\u00adable: with a power factor of over 0.99, the THD(I) is typi\u00adcally approx. 2% at rated output, and remains below 5% all the way down to 10% of the rated output. THD(I) stands for Total Harmonic Distor\u00adtion of Current.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Equipped for natural refrig\u00ader\u00adants<\/h2>\n\n\n\n<p>The use of natural and flam\u00admable refrig\u00ader\u00adants is another issue that data center oper\u00ada\u00adtors have to deal with and the fans described can also be equipped for this purpose. Their elec\u00adtronics circuits would then be designed to comply with EN 60335-2-40 for air condi\u00adtioners with flam\u00admable refrig\u00ader\u00adants, i.e. the maximum surface temper\u00ada\u00adture in the event of a fault must be at least 100 kelvins below the igni\u00adtion temper\u00ada\u00adture of the refrig\u00aderant used. Propane, which is very well suited to many appli\u00adca\u00adtions due to its good heat transfer capacity and its low GWP value, has an igni\u00adtion temper\u00ada\u00adture of 470\u00b0C. The elec\u00adtronic assem\u00adblies, which have been tested and certi\u00adfied accord\u00adingly, ensure that their maximum surface temper\u00ada\u00adture always remains below 370\u00b0C, even if a fault occurs, and as a result they do not become an igni\u00adtion source.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most impor\u00adtant tasks of any data center oper\u00adator is to monitor and control climatic condi\u00adtions in server rooms, as high temper\u00ada\u00adtures and humidity damage the IT devices and result in fail\u00adures. Air condi\u00adtioning concepts have to coun\u00adteract this. Different solu\u00adtions are used here, as no two data centers are the same in [\u2026]<\/p>\n","protected":false},"author":36,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[16,9],"tags":[],"class_list":["post-19702","post","type-post","status-publish","format-standard","hentry","category-fans","category-refrigeration-ventilation"],"acf":[],"_links":{"self":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/19702","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/users\/36"}],"replies":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/comments?post=19702"}],"version-history":[{"count":7,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/19702\/revisions"}],"predecessor-version":[{"id":21796,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/19702\/revisions\/21796"}],"wp:attachment":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/media?parent=19702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/categories?post=19702"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/tags?post=19702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}