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10. Evaporator defrosting
When the cold room temperature is close to or below 0°C, the evaporator is covered with frost, which progressively reduces the heat transfer coefficient, impairs the system's energy performance and, secondarily, reduces the air flow rate. The evaporator must be defrosted, i.e. heated above 0°C to melt the frost.
10.1 Defrosting efficiency
Defrosting is an operation that disrupts storage conditions and is energy-intensive. It can be broken down into four phases:
first phase: supply of heat quantities Q 1 to heat up the frost, Q 2 to heat up the coil and Q 3 to heat up the...
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Evaporator defrosting
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Standards and norms
- Refrigerants – Safety designation and classification - ISO 817 - 2014
- Systèmes frigorifiques et pompes à chaleur partie 1, 2, 3 et 4 - NF EN 378-1-2-3-4 - 2017
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EU Regulation No. 517/2014 of the European Parliament, of April 16, 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No. 842/2006.
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