ENERGY SAVING Procedure One Procedure Two
outperform those of mineral oils. This procedure is only possible with Mobil Gargoyle Arctic SHC NH 68 polyalphaolefi n (PAO) synthetic oil and alkylbenzene (AB), which enable seals that were previously in contact with mineral oil to remain in place.
A change of technology, which improves energy
effi ciency, should not be taken lightly. Each case is diff erent and demands a customised application procedure that is adapted to the systems and refrigerants used. Mobil and Climalife can assist with the preparation and implementation of projects.
For oil analyses, a periodic oil diagnostic test will enable you to monitor the new technology
with the support of an expert. Mobil and other similar brands are registered trademarks that belong to Exxon Mobil Corporation or one of its subsidiaries.
Proof of performance
The SAS Abera plant, located in Saint-Brice-en- Coglès in France, is an abattoir that produces fresh and frozen meat. Using a conventional polyolester oil, Abera had problems with four reciprocating CO2
compressors caused by insuffi cient lubrication.
Using ExxonMobil’s new POE oil in Abera’s refrigeration compressors brought about several benefi ts: Viscosity index: 28% higher. Brookfi eld viscosity at -30°C: 68% lower. Traction coeffi cient: lower, measured on a mini-traction machine (MTM).
Greater protection of sensitive parts from wear.
Longer inspection and maintenance intervals. Lower temperatures in the oil sump and pistons.
Fall in energy consumption.
An ice-cream factory in Russia was operating refrigerant compressors lubricated with mineral oil. This system, which was subject to very low operating temperatures, had to be regularly topped up with mineral oil (up to 66 l/month for each unit with a capacity of 400 litres) and was aff ected by under-performance problems and oil- return diffi culties as the oil remained trapped in
Using this oil brought about the following
benefi ts: Reduction in the consumption of oil and top- ups.
Optimisation of drainage intervals. No accumulation of oil in the evaporators: better oil return.
It should be noted that when draining a clogged circuit and as a replacement for mineral oils, Mobil Gargoyle Arctic SHC NH 68 oil can darken and deposits can accumulate in the fi lters. These phenomena are normal and are due to the solvent power of certain types of synthetic oil.
www.acr-news.com January 2020 29
the evaporators. To ensure that the oil returned and to solve this problem, ExxonMobil’s engineers recommended the use of Mobil Gargoyle Arctic SHC NH 68 on the basis of its excellent fl uidity when cold and specifi c formula that enables it to work with ammonia.
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