Greetings to all our members and industry relations.
I trust you are all well and healthy? “Health is wealth” as the late Steve Jobs said. It’s been huge privilege to serve SAIRAC and its members for the last year and I thank you for your support. We have had a busy year with its challenges but I believe we have also had many successes and achievements to be proud of. I think it would be suitable to firstly thank all the SAIRAC committee members in each of our four centers (Johannesburg, Durban, Cape Town and Port Elizabeth) for all the time that they have offered in the last year towards furthering SAIRAC’s causes. It is an incredible act of service to folks you don’t even know in many cases.
A Primary focus area for SAIRAC in the last 12 months revolved around the application off natural refrigerant as long term energy efficient solutions to limit direct and indirect (from the energy consumed to operate a HVAC & R installation) Global Warming. An interesting fact to consider is that many of the natural refrigerant was commonly used at the turn of the 1900’s. Ammonia (NH3) being the steady Eddy all along. CO2 applications was limited to conditions where condensing temperatures could be kept below 29°C but component materials was a challenge but fortunately this is no longer the challenge it was then. In the last 2 decades we have seen the development into CO2 Trans-critical technologies in order to operate reliably at much higher ambient conditions (not limited to a condensing temperature of around 29°C and below). Thousands of these systems are in operation globally with advances towards greater reliability and energy efficiency being made constantly. CO2 as refrigerant in Sub-critical & Trans-critical applications offer very good environmentally friendly alternatives to HFC applications.
Hydro Carbons (HC) have made a big return in the last decade with the majority of all newly built domestic appliances operating Butane (R600a) or Propane (R290) Both of course being Hydrocarbons (HC). More recent global trend to use higher charge volumes in these systems have resulted in an accepted increase to 500g per system using an HC (R290 or R600a). With the flammability of these refrigerants requiring specific additional training in order to ensure safe design and operation.