Daikin Applied introduces innovative new oil-free chiller

Date: 18 September 2018
Consolidating the competitiveness of its Oil Free Centrifugal chiller portfolio, Daikin Applied has launched a new highly advanced Centrifugal Oil Free water-cooled inverter chiller series with R-134a and R-1234ze(E) refrigerants. Offering increased capacities and expanded applications possibilities, the new chillers are the latest in an array of innovative products developed by Daikin Applied to help specifiers and end users stay one step ahead of EU legislation and rising energy costs. The extremely compact DZ chiller series incorporates advanced technology features that are unique in the market. Presenting up to 32% reduction in footprint if compared to the previous series, the new chiller provides a low noise solution with dedicated compressor sound proof cabinet to ensure outstanding flexibility to match any application. The series is available in a wide range of capacities offering the widest possible choice in use. All models are fitted with a single refrigerant circuit. The R134a range (EWWD-DZ) offers a choice of cooling capacity from 320 kW up to 1,478 kW at nominal conditions, with single compressor models providing an output of up to 742 kW and dual compressor models between 610 kW to 1,478 kW. The R-1234ze(E) range (EWWH-DZ) is available in cooling capacities from 230 kW up to 952 kW at nominal conditions, including single compressor models up to 478 kW and dual compressor models between 430 kW to 952 kW.

Future Proof

The use of R-1234ze(E) offers an environmentally friendly solution, combining a low Global Warming Potential (GWP) with high energy efficiency. R-1234ze(E) is an HFO refrigerant (Hydro Fluoro Olefins). Its Ozone Depletion Potential (ODP) is equal to zero (0) and the GWP is 7 (according to the EU F-gas Regulation based on IPCC’s Fourth Assessment Report). The GWP value is less than 1 according to the IPCC Fifth Assessment Report. The introduction of the new R-1234ze(E) range provides a long-term solution that supports the HFC phase down schedule of the F-gas Regulation.

Magnetic Bearing Technology

The new DZ Water-Cooled Oil Free Centrifugal chiller is fitted with centrifugal compressors which utilise frictionless magnetic bearings for oil-free operation. Its highly advanced design also incorporates integrated variable-frequency drives and high-speed direct drive technology.

Industry leading part-load efficiency

The DZ Series is the result of careful design, aimed at optimising the energy efficiency of the chiller to reduce operating costs. High efficiency compressors and heat exchangers are combined to achieve an impressive performance. The absence of oil in the refrigerant circuit delivers higher heat exchanger performance compared to traditional oiled centrifugal chillers. With a SEER score of up to 9.35, the EWWD-DZ series not only meets but betters 2021 Ecodesign requirements by 43%.

Increased reliability

The frictionless magnetic bearing design needs no oil management system, resulting in increased reliability and reduced maintenance.

Green building design

With the EU low carbon roadmap now targeting an 80% reduction overall in CO2 emissions by 2050 and F-Gas legislation driving a reduction in direct emissions, there is more demand than ever for high efficiency HVAC systems that reduce consumption in use. The new DZ chiller series has been developed to achieve maximum efficiency and is future-proofed to comply with existing design and regulatory standards as well as meeting longer-term EU energy goals. With up to 50% of building energy usage accounted for by HVAC equipment, the new DZ can help boost the environmental credentials of buildings to achieve a high BREEAM or LEED score with lower running costs, making assets more attractive to building owners and tenants.

Designed for compactness

The DZ series’ unique design with stacked heat exchangers presents a minimal footprint. Standard two-passes configuration and availability of single- and three-passes options ensures maximum flexibility for low and high delta temperature applications. The slim line profile of the unit, plus optional knockdown panel, makes it ideal for installation through existing doorways.

Application flexibility

The DZ Series includes models suitable for both high condensing operation (Dry Cooler application) and low condensing operation (Cooling Tower applications), with a wide range of additional options, such as the Rapid Re-Start, which allows the unit to restart after a power failure within 26 seconds following power restoration. Together with an automatic transfer switch to backup generator, the new chiller series offers a comprehensive solution for data centers applications. Enabled for operation via the Daikin On Site platform, the DZ series can be monitored remotely, with one-click access for system optimization and preventative maintenance. Supplied with an App specifically designed to operate on the unit by remote smart device (tablet, smartphone, PC, the DZ offers simplicity and ease of use, with a graphical display of the main data and unit operating parameters.
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