{"id":14805,"date":"2021-02-01T09:00:31","date_gmt":"2021-02-01T08:00:31","guid":{"rendered":"https:\/\/mag.ebmpapst.com\/en\/?p=14805"},"modified":"2024-03-12T17:53:43","modified_gmt":"2024-03-12T16:53:43","slug":"keeping-it-fresh","status":"publish","type":"post","link":"https:\/\/mag.ebmpapst.com\/en\/industries\/refrigeration-ventilation\/keeping-it-fresh_14805\/","title":{"rendered":"Keeping it fresh"},"content":{"rendered":"

Quark, yogurt and vinai\u00adgrettes line Joachim M\u00fcller\u2019s path as he walks through the high-bay ware\u00adhouse of Elsdorfer Molk\u00aderei und Feinkost GmbH, located 70 kilo\u00adme\u00adters south\u00adwest of Hamburg. The building was constructed in 2011, and stores the company\u2019s finished dairy prod\u00aducts on an impres\u00adsive 4,500 pallets at a constant temper\u00ada\u00adture of 5 degrees Celsius. M\u00fcller is the tech\u00adnical director there. \u201cWe store perish\u00adable goods here. That means that oper\u00ada\u00adtional reli\u00ada\u00adbility is very impor\u00adtant to us. The ware\u00adhouse must always be kept at a suit\u00adable temper\u00ada\u00adture, and there must not be any major fail\u00adures,\u201d he says.<\/p>\n

Room for improve\u00adment?<\/h2>\n

The previous venti\u00adlation system completed this task reli\u00adably. Four large, direct drive fans each gener\u00adated an air flow of 62,500 m3<\/sup>\/h while consuming 23 kW in power. This meant that the 1,000-square-meter building was always at a suit\u00adable temper\u00ada\u00adture. But at the begin\u00adning of this year, the energy manage\u00adment system was due for certi\u00adfi\u00adca\u00adtion according to DIN EN ISO 50001. The energy team at Elsdorfer is always looking out for the poten\u00adtial for savings, but the venti\u00adlation system was a sticking point for them. \u201cOf course, the system is a major consumer, as it runs throughout the entire year.<\/p>\n

The fans run for 24 hours, seven days a week,\u201d says M\u00fcller. But at first, the parties involved were skep\u00adtical as to whether replacing the fans would actu\u00adally bring about the desired energy savings. \u201cThe system was only nine years old, we couldn\u2019t imagine that the tech\u00adnology had devel\u00adoped so much in that time frame,\u201d says the tech\u00adnical director.<\/p>\n

From one to four<\/h2>\n

However, the company decided to try it out. After a consul\u00adta\u00adtion with Dieter Hilde\u00adbrandt from Breuell & Hilgen\u00adfeldt GmbH, the deci\u00adsion was made to replace one of the four fans first. M\u00fcller recalls: \u201cTo begin with, we wanted to see whether we could actu\u00adally make the antic\u00adi\u00adpated energy savings. For reasons of oper\u00ada\u00adtional reli\u00ada\u00adbility, we can only ever convert one venti\u00adlation compo\u00adnent at a time anyway, as the high-bay ware\u00adhouse still has to be cooled in the mean\u00adtime.\u201d With the aims of maxi\u00admizing reli\u00ada\u00adbility, improving air perfor\u00admance, and reducing the noise level, Dieter and his team devel\u00adoped a FanGrid-based concept. This means that multiple fans are screwed into one wall. In the case of Elsdorfer Molk\u00aderei, four RadiPac EC centrifugal fans were to replace the first of the four large fans.<\/p>\n

\n
<\/div>

In Elsdorfer Molk\u00aderei und Feinkost GmbH\u2019s high-bay ware\u00adhouse, finished dairy prod\u00aducts are stored on up to 4,500 pallets. (Foto: Jan Hosan | Fotogloria)<\/p><\/div>\n

<\/div>

The new venti\u00adlation system with a total of 16 RadiPac EC fans ensures that the prod\u00aducts remain fresh at a constant 5 degrees Celsius. (Foto: Jan Hosan | Fotogloria)<\/p><\/div>\n<\/div>\n

To manage this, it required some help from another large vehicle first. Dieter reports: \u201cWe used a 40-meter-long, 110-ton car crane to shift the first of the large old fans, which were stored outside the ware\u00adhouse in system containers.\u201d Compared with that, installing the FanGrid was much easier. The conve\u00adnient size of the fan cubes meant that two installers were able to bring them into the container and screw them to a wall. They were also quick to connect to the system thanks to plug and play. This was an obvious advan\u00adtage. After five days of removal and instal\u00adla\u00adtion work, the FanGrid entered into service, boasting a power consump\u00adtion of 17.8 kW, an air flow rate of up to 75,000 m\u00b3<\/sup>\/h, and a maximum pres\u00adsure build-up of 900 Pa.<\/p>\n

\n

\u201cAs four fans now work together in one unit, we have improved our oper\u00ada\u00adtional reli\u00ada\u00adbility. If one fails, the other three will take over and keep the air volume constant.\u201d<\/p>\n

Joachim M\u00fcller, Tech\u00adnical Director at Elsdorfer Molk\u00aderei und Feinkost GmbH<\/cite><\/p>\n<\/blockquote>\n

A worth\u00adwhile invest\u00adment<\/h2>\n

After the first fan had been in use for three months, one thing became clear to Joachim M\u00fcller and the team: the invest\u00adment was worth\u00adwhile. Elsdorfer saved around 10,000 euros in energy costs, just by replacing the first fan. \u201cWe were honestly surprised that we could save that much energy as a result. We weren\u2019t expecting that,\u201d says M\u00fcller.<\/p>\n

The FanGrid provided other bene\u00adfits along\u00adside its energy costs: \u201cAs four fans now work together in one unit, we have improved our oper\u00ada\u00adtional reli\u00ada\u00adbility. Thanks to the redun\u00addant design, it won\u2019t matter if one fails, as the other three will take over and keep the air volume constant,\u201d explains M\u00fcller. This is the key point for a ware\u00adhouse with pallets full of perish\u00adable goods.<\/p>\n

For a ware\u00adhouse with pallets full of perish\u00adable goods, oper\u00ada\u00adtional safety is a key issue. (Photo: Jan Hosan | Fotogloria)<\/p><\/div><\/div>\n

He also notes the advan\u00adtages when performing repairs on the venti\u00adlation system. It will not be essen\u00adtial to carry them out quickly. In fact, the repair personnel can take their time. Another posi\u00adtive side effect is also a lower noise level. The replace\u00adment has decreased this by around 12 dB(A): \u201cWe are located in a mixed area, with busi\u00adnesses along\u00adside resi\u00adden\u00adtial prop\u00ader\u00adties. So noise emis\u00adsion is also impor\u00adtant here,\u201d says M\u00fcller. \u201cAnd since the project went so smoothly and simply, we agreed that we should also replace the other three venti\u00adlation units with FanGrids.\u201d<\/p>\n

The four fan walls, made up of a total of 16 RadiPac EC centrifugal fans, have now been in oper\u00ada\u00adtion since May 2020, keeping the yogurt, quark and other prod\u00aducts cool as per require\u00adments. While the old fans required a power output of 78 percent, the FanGrids achieve the same air flow at 50 percent. As a result, Elsdorfer makes two sets of savings \u2013 around 47,000 euros per year in energy costs, and 100 metric tons in CO2<\/sub> emis\u00adsions.<\/p>\n","protected":false},"excerpt":{"rendered":"

Quark, yogurt and vinai\u00adgrettes line Joachim M\u00fcller\u2019s path as he walks through the high-bay ware\u00adhouse of Elsdorfer Molk\u00aderei und Feinkost GmbH, located 70 kilo\u00adme\u00adters south\u00adwest of Hamburg. The building was constructed in 2011, and stores the company\u2019s finished dairy prod\u00aducts on an impres\u00adsive 4,500 pallets at a constant temper\u00ada\u00adture of 5 degrees Celsius. M\u00fcller is [\u2026]<\/p>\n","protected":false},"author":12,"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":[138,180],"class_list":["post-14805","post","type-post","status-publish","format-standard","hentry","category-fans","category-refrigeration-ventilation","tag-retrofit","tag-ventilation-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/14805","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\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/comments?post=14805"}],"version-history":[{"count":8,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/14805\/revisions"}],"predecessor-version":[{"id":14817,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/14805\/revisions\/14817"}],"wp:attachment":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/media?parent=14805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/categories?post=14805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/tags?post=14805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}