Happy cows
at the Mohr dairy farm

For more summer freshness in the cowshed: Animal welfare is the top priority at the Mohr dairy farm in Callbach in Rhineland-Palatinate. Because healthy and relaxed dairy cows deliver more milk of better quality. The decision to use frequency-controlled ventilation, which keeps the air in the barn fresh when it's hot, was an easy decision for farmer Yvette Mohr. Peter Seipel from Danfoss service partner Klebs+Hartmann assisted her with the planning, implementation and commissioning.

Alma's test report: It's finally summer freshness in the stable!

Hot summers with record temperatures are no longer a rarity in Europe either. Not only humans feel this, but also many animals. Climate change has us all in its grip – including us dairy cows. When it gets very hot in summer, we start to sweat a lot too. Then we dream of summer freshness in the stable. The Mohr family, in whose barn I live together with my girls, recognized this and recently provided more wellness and a real feel-good climate in our home. Read my preliminary review here.

Summer freshness in the stable

You have to imagine it like this: I am currently sharing my home with 449 flatmates. We live together in a large, open complex, which is being gradually transformed into a wellness oasis for us. That's a good thing, because after all, it's always said that the customer is king or queen.

My day usually starts early. After a hearty breakfast at the all-you-can-eat buffet, I stretch my legs before heading towards the daytime entertainment. In addition to the daily carousel ride in the milking parlour, this also includes an extensive massage on the brush roller, a refreshment in the spray mist on warm days and of course keeping your nose in the wind under the new fans in the shady, cool barn. So it can also be endured well in summer!

These measures for summer freshness in our cowshed keep us fit and in a good mood even when the outside temperatures are high, which is something the Mohr family attaches great importance to. As good tenants, we put in a lot of effort and plenty of fresh milk.

Frequency converters ensure more animal welfare at the Mohr dairy farm

Yvette Mohr from the dairy farm of the same name in Callbach in Rhineland-Palatinate knows about the stress her cows suffer in summer. "Animal welfare is important to us," explains the farmer. In addition, there is also economic damage for the family. Cows suffering from heat stress produce up to 10 percent less milk. "Cows don't like it too warm and not too cold," explains Mohr. That's why the family had 22 fans installed in the barn on their farm. “As soon as the temperature rises above 21 degrees, these kick in and cool the stable. That's why they are frequency converter so important to us.”

Summer freshness in the barn: A special assignment for the technicians

For Peter Seipel from Danfoss Drives service partner Klebs + Hartmann in Ludwigshafen, the installation of the 22nd frequency converter of the type VLT HVAC Drive from Danfoss Drives a special effort. "We've never worked on the switch cabinet on a dairy farm," laughs Seipel, shooing the flies away. But the application fascinated him because he sees even more fields of application for converter technology in agriculture. "Our goal is to achieve as much redundancy as possible in the system," explains Seipel. For this reason, each fan is assigned a converter in the control cabinet. "Technically, only one converter for 22 fans would have been feasible, but that's how we guarantee trouble-free operation. If a component fails, we can quickly replace the converter 1:1 in the control cabinet.”

How did they do that?

Peter Seipel from Danfoss service partner Klebs + Hartmann explains the planning, installation and commissioning of the 22 type VLT HVAC Drive from Danfoss Drives. 


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Attention lactic acid: special protection by lacquered circuit boards

Summer freshness in the cowshed

The challenge for Seipel and his team was the motor cable lengths of more than 130 m and the ambient temperatures in the adjacent milk carousel, near which the control cabinet is located. “We did not use air conditioning in the control cabinet because these frequency converters can handle temperatures of up to 45 degrees without any problems. But we had to choose a variant with painted circuit boards because the lactic acid attacks the electronic components.”

The Mohr family consciously invested in the technology in order to minimize maintenance and repair times and to keep the temperature in the stable comfortable for the animals. “Of course, 22 drives is the slightly more expensive version, but we were also able to make savings. Our experts dispensed with displays on each converter. These make no sense to us here. A display on a converter is enough for us and saves a lot of money,” reports Seipel.

A completely new market is emerging for him and his team in agriculture. "Many farmers want to invest, put animal welfare first and at the same time want to save energy."

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