Testing, certification and training services
Centralny Ośrodek Chłodnictwa w Krakowie COCHCentralny Ośrodek Chłodnictwa w Krakowie COCHCentralny Ośrodek Chłodnictwa w Krakowie COCH
+48 503 021 131
30-133 Cracow, Poland
Centralny Ośrodek Chłodnictwa w Krakowie COCHCentralny Ośrodek Chłodnictwa w Krakowie COCHCentralny Ośrodek Chłodnictwa w Krakowie COCH

Dehumidifier tests

Testing of dehumidifiers

We offer comprehensive tests of dehumidifiers (air dryers).

Air dehumidification is used in many areas and technologies as a component of comfort and industrial air conditioning processes or technological processes, and is also used to prevent material corrosion, moisture condensation on the surfaces of hydraulic installations and caking of loose materials.

Dehumidifiers made as stand-alone and portable devices are especially suitable for applications where drying objects in fixed air-conditioning systems is uneconomical or impossible. Autonomous, portable devices are mainly used in construction technology to accelerate the process of drying rooms by reducing the relative air humidity in a closed space. These devices are known in circulation as condensing, compressor air dryers.

  • Condensation efficiency tests,
  • Energy consumption research,
  • Determining the characteristics of air dryers,
  • Tests of work in abnormal conditions,
  • A set of tests to assess the compliance of products with the LVD directive,
  • Electrical safety tests (mark B),
  • Comparative study,
  • Optimization research,

At the client’s request, we also perform other tests, in accordance with any agreed test schedule, and tests at the customer’s.

  • Intake air filter that traps solids contaminating the dried air;
  • Air cooler, designed to reduce the temperature of the incoming humid air to a temperature enabling condensation of a significant part of the moisture;
  • A condenser, in which the cooling air stream in the evaporator is heated to approximately the initial temperature;
  • A suction fan, which forces a constant flow of ambient air to the dryer, and after the above-mentioned devices pass, forwards the air through the perforated front wall of the dryer into the environment, with a certain part of the air stream being used to cool the compressor compartment and the electric unit of the dryer before leaving the dryer;
  • Compressor, which is the basic element of the closed refrigeration circuit. Its task is to maintain the correct pressure levels in the evaporator (low pressure side) and in the condenser (high pressure side) and ensure the required refrigerant flow rate in the circuit;
  • The expansion element, typically a capillary, provides expansion of the high-pressure liquid refrigerant flowing from the condenser to the vapor pressure of the air cooler.

In addition, the cooling circuit is equipped with a filter-dehydrator, whose task is to remove impurities and moisture from the liquid refrigerant, which appear during operation.

Refrigeration R&D Center has been cooperating with domestic producers of dehumidifiers, participating for many years, including in research and development carried out by these companies in the field of the devices in question



  • COCH Refrigeration R&D Center in Krakow
    Juliusza Lea 116,
    30-133 Kraków, Poland
  • mgr inż. Dorota Niedojadło
    - laboratory manager
  • +48 12 637 08 57
    +48 667 600 635
    +48 503 021 131

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