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STLE Toronto November Meeting Notice
Monday November 1, 2010
Joint Dinner Meeting with the ASHRAE Toronto Chapter

The Old Mill
21 The Old Mill, Toronto, Ontario
(Click HERE for directions)

5:30 - 6:00 pm Hospitality
6:00 - 7:15 pm Dinner
7:15 Technical Presentation

Topic: Lubricants for Low Global Warming Potential Refrigerants: Lubricants Optimized for Transcritical Carbon Dioxide (R-744) Applications


Presenter:   Edward Hessell, Hatco Division, Chemtura Corporation, Fords, New Jersey, USA


Carbon dioxide (R-744, CO2) is a natural, environmentally benign refrigerant with an ozone depleting potential (ODP) of zero and a global warming potential (GWP) of 1.  Although CO2 has been used for more than a century in traditional subcritical evaporation/condensation commercial refrigeration, the practical implementation of the transcritical cycle has resulted in a resurgence of research into the use of CO2 for many refrigeration and heat pump applications. The lubrication requirements are different from  hydrofluorocarbon (HFC) refrigerants due to both the higher system operating pressures of CO2 and molecular structure differences of CO2 vs. HFCs. In particular, the high solubility of CO2 in the traditional lubricants used with HFCs results in significant viscosity reduction in the compressor which can result in insufficient lubrication of bearings and improper sealing of clearances.  A challenge exists to design a lubricant with limited CO2 solubility characteristics while still ensuring good oil return and high heat transfer efficiency.

Ed Hessell has been involved in industrial chemical research and development for over 25 years, mostly in the area of lubricant additive and synthetic lubricant development.  Ed holds a B.S. degree in chemistry from the University of Connecticut and received his PhD in organic chemistry from the University of Rochester, NY.  He has worked for Ciba-Geigy Corporation, Texaco, and King Industries Specialty Chemical.  Ed joined Chemtura Corporation in 2008 as the Technical Manager for Refrigeration Lubricants where his group is developing advanced ester technologies for existing and next generation refrigeration applications.




Improving Lubrication in the HVAC Industry

Presented by: Chris Barnes, P.Eng, MBA, Honeywell Building Solutions



Lubrication in the HVAC industry and is sorely neglected and overlooked in importance.  As is the case in many industries, lubrication is mostly an afterthought, but is now drawing attention because of its ability to both reduce costs and save energy - thereby achieving the often duelling agendas of going lean and going green.


Poor lubrication actually benefited many in the HVAC industry by increasing the number of failures and repairs and consequently increasing sales of equipment and emergency service.  Building operators and property managers often play right into the hands of unscrupulous HVAC service providers by seeking ever lower maintenance and operating costs.  This short term reducing of preventative maintenance (PM) comes at the much larger expense of long term capital replacement as well as energy savings.  Well maintained and lubricated equipment such as a bearing will last longer and operate efficiently.  Neglect it and deprive it of lubricant such as grease and friction will increase (wasting energy) and the bearing will eventually seize-up and fail, causing collateral damage to the housing and surroundings.  A nice sale for someone!


This presentation will cover some basics of lubrication, present case studies and suggest ways to improve common practices in the HVAC industry.  The content and underlying principles are equally applicable to other industries and are sure to generate some lively discussion in this first joint meeting between the Toronto chapters of the ASHRAE and the STLE.



Studied Chemical Engineering at the University of Toronto and in the oil industry working for Petro-Canada Lubricants in R&D, Customer Service for OEM Specialty Fluids and Heat Transfer Fluids, and Field Technical Service.  While studying for an MBA part-time at the Schulich School of Business, he accepted the position of National Sales Manager at Lubrication Engineers of Canada.  After a decade in the lubricants industry Chris joined Honeywell Building Solutions (Canada's largest HVAC service provider) in 2005 as an Account Executive and has won over a dozen Sales Awards including Honeywell's top honour, Presidents Club.
Chris is a member of Professional Engineers Ontario (PEO), the American Society for Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE), and the Society of Tribologists and Lubrication Engineers (STLE).  He was Chair of the Toronto Section of the STLE for the 2005 - 2006 year.

Note: Dinner is Monday, November 1


More details to follow in our November newsletter.


STLE members and guests register with Ed Milanczak at


STLE Members $45, nonmember $65, students $20.


ASHRAE members and guests register at


Also, please pass this along to others in your company or to colleagues.