8. Protection against liquids
The compressor can be subjected to two types of operating accident due to the presence of liquid. These are oil surges and liquid refrigerant surges.
8.1 Coup d'huile
When the compressor stops, refrigerant vapours returning to the crankcase can dissolve in the oil. On subsequent start-up, the reduction in crankcase pressure causes the oil/refrigerant mixture to degas. This leads to the formation of foam, which in large quantities can rise in the cylinders. This foam, formed by splashing in the crankcase, can be seen in figure 25 . In a reciprocating compressor, this is the type of oil hammer that can cause discharge...
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Protection against liquids
Desuperheating of intake steam
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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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