Enéo d’or award in equipment category
At the 3rd edition of the Enéo Energy, Climate Control and Water Management Exhibition held in Lyon, France, from 25 to 28 February 2009, a jury consisting of trade organisation representatives and the trade press awarded Daikin France the Enéo d’or for Daikin’s CO2 based VRV® solution. The award was accepted for Daikin France by Marketing Manager François Deroche.
CO2 based VRV® represents the latest in a string of Daikin VRV® innovations that started with the Variable Refrigerant Volume concept itself. With its Global Warming Potential of only 1, CO2 has a significantly lower environmental impact than other refrigerants with typical values between 550 and 3300.
Meeting the technological challenges of CO2
CO2 based VRV® is the logical culmination of Dakin’s continuing efforts to conserve the environment. Harnessing the environmental advantages of CO2 into a commercial available application represents a significant technological challenge. To deal with CO2’s low critical point of 31°C, CO2 based VRV® uses CO2 in a transcritical refrigeration cycle. A new Daikin dual compression swing compressor was also developed to handle the high operating pressures required with CO2 (120 bar).
In addition, the system incorporates new optimised refrigerant circuit technology including a Dual Stage Inter-Cooler circuit - enabling optimum refrigerant control & efficiency - and a gas cooler with three-row heat exchanger for maximum heat exchange between the CO2 gas and the ambient air. Piping size has also been reduced compared to systems with conventional refrigerants. An automatic test run function, night quiet mode, and connectivity with all current VRV® control & management systems complete the main features of CO2 based VRV®.
Tomorrow’s solutions today
At this stage the new CO2 based VRV® system is intended to demonstrate and investigate new environmental technology. Daikin expects that CO2 based VRV® will be welcomed by customers wishing to install HFC-free systems. Since CO2 based VRV® has attractive COP levels, Daikin is targeting applications where heating demand is stronger than cooling demand.
"Parallel to this development, Daikin is continuing to pursue improvements in its current HFC -based VRV® systems with respect to both energy-efficiency and environmental impact."
"Daikin is worldwide market leader in VRF systems, and intends to consolidate this leadership by launching and improving new VRV® extensions – such as CO2 based VRV® – and by perfecting its existing HFC-based VRV® systems, reducing further the TEWI impact of both ranges."
"However at this stage Daikin’s current HFC-based VRV® systems still yield better EER and COP values. In the future Daikin will continue its efforts to enhance both systems’ efficiency ratios."
For more information about VRV® with CO2 refer to the article “Daikin launches world's first CO2-based VRV® system” which can be found under the news chapter of www.daikin.eu.
For more information on Daikin France and Daikin’s pioneering VRV® systems and its environmental efforts in general, visit Daikin France at www.daikin.fr or visit
Daikin Europe N.V. at www.daikin.eu.