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Humidity problems solved in small cold and chill stores

In smaller cold stores used by laboratories, catering facilities and restaurants, the naturally high relative atmospheric humidity is often the cause of problems. These chill and cold stores are high traffic areas with frequent door opening. Subsequently warmer air constantly penetrates into the room, causing the relative atmospheric humidity to rise. In laboratories, evaporation from Petri dishes and test tubes also occurs, which is often unwelcome due to the risk of condensation forming in the tubes as well as the need to provide the incubated cultures with air. Where a cold or chill room is used for the storage of vegetables and meat for example, more moisture is brought into the room and the relative atmospheric humidity increases. Refrigeration of warm products in the room also further increases condensation.

When cold surfaces are surrounded by moist air, water vapour will condense on the surface. A typical example is a cold beer glass in the summertime. The problems are resolved by dehumidifying the air so that condensation and subsequent mold and fungus growth do not occur. The need for defrosting is reduced in low temperature cold stores as forming of frost on the evaporators is reduced. Thereby, unwelcome temperature variations caused by defrosting are avoided.

Munters IceDry® dehumidifiers and condensation control units can be installed either outside or within the actual store as it excels in functioning independently of the ambient air temperature- in contrast with cooling dehumidifiers which work at reduced capacity from approximately + 15°C. This also makes dehumidification in freezer departments a possibility.

Munters has created a complete concept for small cold and chill stores. The solution requires no adjustment to be made to the construction of the building and the dehumidifier itself can be located within or outside the room. Similarly, adjustment and readings of the current relative atmospheric humidity in the store can take place in the same place as temperature readings.

Laboratories
Six cold stores at the University of Copenhagen provide storage and cultivation of algae cultures in nutrient-rich water for research and educational purposes. Previously, problems were experienced with mold and fungus growth on walls, curtains and test tubes and the labels became illegible. Six Munters' dehumidifiers were fitted outside the cold stores, blowing the dehumidified air into the rooms. The relative atmospheric humidity is now kept constant and the above mentioned problems are avoided.

Catering centres
At Novo Nordisk’s training facility at Hvidøre in Klampenborg, a cold store is used for storage of homemade products and for maturing meat. The desire here is to purchase whole animals for maturing in order to ensure optimal quality, however the hung animals began to spoil prematurely due to excessively high relative atmospheric humidity. Munters installed a smaller dehumidifier in the actual cold store, which now ensures that the relative atmospheric humidity remains and that the meat matures under correct hygienic conditions.

Condensation control in larger coldstores is a common application for Munters. Ice and frost is caused when moist air enters the cold store. When it comes into contact with cold surfaces such as floors, walls and evaporator coils the water vapour in the air condenses to form water then freezes to form ice. If the cold store has a loading dock, it may remain as condensate but will result in wet floors and surfaces.

事实浏览

        
  • No condensation
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  • No growth conditions for mold and fungus
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  • Improved hygiene conditions
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  • Reduced need for defrosting
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  • Increased temperature stability
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  • Continual operation of the cooling plant

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