www . refrigerationandaircon . co . za RACA Journal I July 2024 37
Support
GRANT LAIDLAW
Grant Laidlaw is currently the owner of the Air Conditioning and Refrigeration Academy ( ACRA ) in Edenvale . He holds a Bachelor of Business Administration and an associate degree in educational administration . He has a National Technical Diploma and completed an apprenticeship with Transnet . He has dual-trades status : refrigeration and electrical . He has been involved with SAIRAC for over two decades and served on the Johannesburg committee as chairman and was also president between 2015 and 2018 . Currently he is the SAIRAC national treasurer .
WELCOME TO THE SOLUTIONS PAGE
By Grant Laidlaw
Many people ask for assistance in the understanding of theoretical and practical aspects of the industry . We are going back to basics as I have questions coming in that indicate that the basic understanding necessary to work in the industry is not in place .
Gordon asks : Grant , I see that the start date for the phase down for HFCs is 2024 . Can you shed some light on this please . Is R32 on the phase down list ?
Hi James , yes , let us look into this by starting second part of your question .
Yes , R32 with a Global Warming Potential ( GWP ) of 675 is on the HFC phase down list , looking at the Montreal Protocol and the Kigali amendment .
The chart below looks at the Montreal Protocol control measures .
NOTES a . The above applied with the exception of a very small number of internationally agreed essential uses that are considered critical to human health and / or laboratory and analytical procedures . b . Up to 0.5 % of base level consumption can be used from 2020 until 2030 for servicing existing refrigeration and air conditioning equipment . c . Up to 2.5 % of base level consumption can be used until 2040 for servicing existing equipment , subject to review in 2025 . d . All reductions include an exemption for pre-shipment and quarantine uses .
Ozone depleting substances Developed countries Developing countries Chlorofluorocarbons ( CFCs ) Phased out end of 1995 ( a ) Phased out end of 2010 Halons Phased out end of 1993 Phased out end of 2010 CCl4 ( Carbon tetrachloride ) Phased out end of 1995 ( a ) Phased out end of 2010 CH3CCl3 ( Methyl chloroform ) Phased out end of 1995 ( a ) Phased out end of 2015
Hydrochlorofluorocarbons ( HCFCs )
Freeze from beginning of 1996 35 % reduction by 2004 75 % reduction by 2010 90 % reduction by 2015 Total phase out by 2020 ( c )
Hydrobromofluorocarbons ( HBFCs ) Phased out end of 1995 Phased out end of 1995
Methyl bromide ( CH3Br ) ( horticultural uses )
Freeze in 1995 at 1991 base level 25 % reduction by 1999 50 % reduction by 2001 70 % reduction by 2003 Phased out end of 2005
Freeze in 2013 at a base level calculated as the average of 2009 and 2010 consumption levels ( b ) 10 % reduction by 2015 35 % reduction by 2020 67.5 % reduction by 2025 ( c ) Total phase out by 2030 ( d )
Freeze in 2002 at average 1995 – 1998 base level ( e ) 20 % reduction by 2005 Phased out end of 2015
Bromochloromethane ( CH2BrCl ) Phased out end of 2002 Phased out end of 2002
Hydrofluorocarbons ( HFCs )
10 % reduction by 2019 30 % reduction by 2024 70 % reduction by 2029 80 % reduction by 2034 85 % reduction by 2036
Freeze in 2024 ( f ) 10 % reduction by 2029 30 % reduction by 2035 50 % reduction by 2040 80 % reduction by 2045
Summary of Montreal Protocol control measures .
www . refrigerationandaircon . co . za RACA Journal I July 2024 37