Keyter Commercializes First-Ever Scroll Chiller Using Honeywell’s Solstice Ze Refrigerant

Honeywell announced that Keyter will use Honeywell’s ready-now Solstice ze (R-1234ze) refrigerant in their new Helvetia scroll chillers for commercial building applications. With a global warming potential (GWP) of less than one, Solstice ze is a hydrofluoroolefin (HFO) refrigerant that has a GWP that is 99.9 percent lower than R-410A and allows industry professionals to stay compliant with regulations while benefitting from government subsidies that are calling for reduced-impact alternatives to high GWP hydrofluorocarbons (HFCs).

Keyter’s Helvetia scroll chillers use the new Danfoss DSG scroll compressors, which have been optimized for use with Honeywell’s Solstice ze refrigerant. The adoption of these scroll compressors in Keyter’s product range increases energy efficiency when compared to models utilizing R-410A or R-454B, while also offering the same cooling capacity. These compressors are also available with high temperature models, making them a viable choice for heating applications.

Additionally, Keyter is developing a new range of air-cooled heat pumps with Solstice ze refrigerant addressing reversible systems for dedicated heating applications. Solstice ze supports this new generation model to reach higher condensing temperatures, enabling high-temperature water production of up to 90°C, while existing models only achieve water temperatures of 55°C–65°C due to their relatively low condensing temperatures.

Solstice ze can increase the energy efficiency of chillers and can help lower total operating costs for customers. Scroll chiller technology using Solstice ze also supports accelerated decarbonization of commercial buildings by eliminating the need for a fossil fuel boiler to generate hot water for heating.

“With Solstice ze, Honeywell is providing Keyter with a high-performing solution that has an ultra-low GWP satisfying the European F-Gas Regulation, supports the reduction of energy bills and can help accelerate the decarbonization goals of commercial buildings” said Julien Soulet, vice president and general manager, Fluorine Products, Europe, Middle East and Africa, Honeywell Advanced Materials. “Honeywell’s Solstice technology is ready-now to support our customers’ innovation and drive their environmental transformations.”