One of the most frequent causes of operational problems with freezer and normal chilling temperature refrigeration systems is ice buildup on air coolers and evaporators, notes eurammon, a joint initiative of companies, institutions and individuals advocating an increased use of natural refrigerants. For example, ice formation on the evaporator's fins is detrimental to the heat transfer and results in a temperature increase in the cold room. To minimize energy consumption, an effective and efficient defrosting system is required.

In an interview with the team at eurammon, Michael Freiherr, chief technical officer at Güntner GmbH & Co. KG, discusses influencing factors on the energy efficiency of defrosting systems and looks at the special requirements when using natural refrigerants. Among the topics are:

  • How can the energy efficiency of a defrosting system be calculated?
  • What aspects influence the energy efficiency of a defrosting system in practice?
  • Which special aspects apply to defrosting methods in ammonia refrigeration systems?
  • Which special aspects apply to defrosting methods in carbon dioxide refrigerating systems?
  • How can energy efficiency be evaluated in general for defrosting systems with natural refrigerants?

Click here for the Q&A.