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Events and Exhibitions
different temperatures. This technology brings benefits of efficiency, reduced refrigerant usage and optimal performance, especially in partial load conditions.
To validate these theoretical benefits, Danfoss conducted a field test in a supermarket utilising four condensing units. After initially running a comparative digital solution, Danfoss replaced them with its Optyma Inverter units. The real-life test showed 6 700 kilowatt-hours saved annually, extremely close to theoretical predictions, translating into significant operational expense reductions and a corresponding decrease in CO2 equivalents.
Danfoss ' s semi-hermetic compressors are highlighted for their " rock solid " durability, long lifetime, and full serviceability, ensuring prolonged use. Packaged condensing units featuring these semi-hermetic compressors are available with both variable speed( for energy efficiency) and fixed speed options( for longevity and serviceability). These units are particularly well-suited for high ambient conditions due to their generously sized condensers.
Schaddach also recounted a customer-driven innovation where a serviceable semi-hermetic unit with heat recovery capabilities was customised, allowing the customer to utilise excess heat for boiling water in food service operations – a " next level of sustainability ".
Finally, Schaddach affirmed Danfoss ' s current CO2 solutions and ongoing efforts to expand their portfolio, particularly with semi-hermetic CO2 compressors. He described their smaller CO2 units as a " truly plug-and-play concept " similar to the Optyma Plus. Recognising that installers sometimes find high-pressure CO2 systems challenging, Danfoss has designed their units with electronic controllers that simplify commissioning. A significant advantage of these CO2 units is their design for high ambient temperatures and robust infrastructure, making them an excellent solution for demanding climatic conditions.
In a brief Q & A, Schaddach clarified that Danfoss does not manufacture evaporators themselves but collaborates with manufacturers in certain markets. He noted a positive trend with more display cabinet manufacturers optimising their products for CO2, moving towards systems that can operate at 80 bar and beyond, further enhancing efficiency and sustainability in the HVAC landscape. RACA
This was one of 18 SAIRAC free-to-attend seminars at FRIGAIR 2025.
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RACA Journal I November 2025 www. refrigerationandaircon. co. za