Daikin, one of the world’s leading air conditioning manufacturers, in partnership with Nikken Sekkei, selected as a finalist in the Global Cooling Prize

Daikin, a global leader in air-conditioning which manufacturers air conditioners, refrigerants and compressors launched the first VRV* air-conditioning system in 1982. Daikin also launched the world’s first residential-use air conditioner using R-32 refrigerant. Nikken Sekkei is one of the topmost design (architecture and engineering) companies based in Tokyo, Japan.

*VRV is a trademark of Daikin Industries, Ltd.

About the breakthrough technology

The cooling system adopts the following two innovative methods to achieve higher efficiency and lower climate impact cooling solution. First, a multi split method is used to connect three indoor units with one outdoor unit. This method helps optimize refrigerant flow rate for each of three indoor units depending on ever-changing cooling load and use refrigerant control technology to closely modulate the capacity. Second, evaporative cooling method is used to improve the system efficiency by using heat of vaporization to lower the temperature of the air that outdoor unit takes in. The system will use control technology which measures the outdoor temperature with sensors and applies the control system to automatically spray water under the conditions with high ambient temperature where cooling load sees particularly high.

As part of Daikin’s research and development initiative, the use of low GWP HFO-1234ze(E) refrigerant is proposed based on the criteria of the Global Cooling Prize. As per Daikin’s current refrigerant policy, R32 is considered to be the most balanced refrigerant; and Daikin will continue to proactively promote it. Daikin believes that reducing the environmental impact of room air conditioners can only be achieved by disseminating equipment with the best possible efficiency and low environmental impact throughout the lifecycle of all equipment all over the world. In line with our environmental vision 2050 where we are aiming for carbon neutrality by 2050, as a manufacturer of both equipment and refrigerant, Daikin continues to work on the quest of new refrigerants and equipment taking into account safety, energy efficiency, climate change, and affordability, and this proposal is part of that research initiative.