The changing face of refrigeration lubricants

  Enquire / contact me

For refrigerants the attention continues to focus on the environmental impact that they can have on the Ozone layer and a user’s carbon footprint.

Industrial Equipment & Supplies

The changing face of refrigeration lubricants
The changing face of refrigeration lubricants

The refrigeration industry is going through a period of change thanks to a raft of innovations and technological developments and updates to safety and environmental legislation, according to Rainer Lange, Mobil SHC brand advisor - EAME.

For refrigerants the attention continues to focus on the environmental impact that they can have on the Ozone layer and a user's carbon footprint. As a result, companies are turning towards "natural" refrigerants, such as ammonia, carbon dioxide (CO2) and hydrocarbons, or the newer hydrofluoroolefin (HFO) technologies in an effort to reduce their environmental impact.

Benefits of CO2 as refrigerant

CO2 was widely used as a refrigerant fluid in the early twentieth century; however, its popularity declined with the development of chlorofluorocarbons (CFCs). But the use of CO2 as an industrial refrigerant fluid has witnessed a resurgence. The reason for this comeback is that it has excellent heat transfer properties and a high volumetric cooling capacity, allowing for installations of relatively small cooling units. And with a much lower environmental impact than CFCs, the reason for its increasing popularity is clear. However, there is a number of key lubrication challenges associated with CO2 as a refrigerant fluid that need to be addressed before equipment based on this technology can operate at peak performance.

The lubrication challenge

The two key issues surrounding the lubrication of CO2-based systems are the elevated operating pressures and CO2's high solvency, which takes place in subcritical cascade systems and transcritical high pressure applications. The daily need for evaporator defrosting with hot CO2 places high loads and stresses on bearings and other moving parts of the compressor. Its high solvency and solubility in some polyolester-based (POE) lubricants also needs to be taken into account as it leads to potential excessive viscosity reduction as well as possible CO2 outgassing on bearing surfaces, disrupting lubricant films. The impact of these issues varies from an improper sealing of clearances and a potential loss of compression ratio, to insufficient lubrication leading to excessive bearing wear, potentially resulting in compressor damaged.

Next generation lubricants

ExxonMobil identified the need for a CO2-miscible refrigeration lubricant that delivers step-out performance. It therefore developed Mobil SHCTM Gargoyle 80 POE - a high performance oil designed specifically for refrigeration compressors using carbon dioxide. The product has been formulated using an innovative polyolester technology (POE) to provide outstanding lubricity, wear protection and chemical and thermal stability.

The potential for CO2-based systems is strong and operators can now be confident that there is a lubricant option to help maximise this promise.

Posted on June 8, 2016 - (2004 views)
ExxonMobil Fuels & Lubricants
Hermeslaan 2 T425.2
1831 Machelen Brussels - Belgium
View full company profile
More products from this supplier
Injecting production into plastic process with high performance lubricants
Optimising cement plant productivity with high performance lubricants
How to select lubricants for refrigeration systems using natural refrigerants
ExxonMobil helps melt away steel mill lubricant issues
Brewer Saves €20,300 by Switching to Mobil Gargoyle Arctic™ SHC NH 68
Why next generation gas engines need next generation oils
ExxonMobil releases guidance to help optimise industrial grease selection
Driving the Digital Revolution with Hydraulic Fluids
ExxonMobil launches enhanced range of cutting fluids, Mobilcut™-New
New Content on ExxonMobil’s Gas Engine Oil Campaign Hub
Driving the Digital Revolution with Hydraulic Fluids
Gas Engine Oils
Lubricant for Hydraulic Systems
Why Does Your Grease Choice Matter for Wind Turbines?
ExxonMobil Presents Two New Products for the Agricultural Industry
Mobil SHC Cibus™ Hydraulic Oil NSF H1
Mobil SHC Rarus Series Next-Generation Synthetic Air Compressor Oils
Wind Turbine Gearbox Oil Mobil SHC Gear 320 WT
Mobil Pegasus Natural Gas Engine Oils
Grease for Pulp and Paper Mills
Related articles
HMC Connectors
Built-in Syringe Pump
DC Charging Controller
Microwave Up & Downconverter
The Defy of Corrosion-free Energy Supply System
When Machine Design and Aesthetics Come Together
''Europe is Just the Beginning of our Global Expansion Plans''
Online Bolt Configurator
Power Spring for Draw Wire Encoder Application
Servo-electric Gripping Module
Microwave Up & Downconverter
Elesa Standard Machine Elements Ready for Hannover Messe
Print a wide range of labels and signs
Oil-free Compressed Air Technology
Precision Measuring Centers With “Cycloid Measurement”
Transmission Elements ZCL and ZCR
Torque Limiter
Industrial inkjet printers
Buttons and switches
Breakthrough Plug & Use Connectivity Technology
Servo-electric Gripping Module
Elesa Standard Machine Elements Ready for Hannover Messe
Print a wide range of labels and signs
Enclosure System
Cleanroom Technology
Porous Aluminium Products
Easily Print Labels from your Smartphone!
Hoist Trolleys
Planetary Gearboxes
New JD Mini for Maximum Efficiency