Going glycol free can improve heat transfer efficiency and, therefore, improve performance and reduce running costs. While glycol is useful in environments where freezing is a concern, it can be an environmental or health hazard due to its toxicity and can degrade over time which causes reliability problems.

Choosing a glycol-free option can also be regulatory requirement in some regions and for sensitive environments like food processing, pharmaceutical manufacturing, or data centres.

So DAPUK has developed a “closed loop” system that delivers an efficient solution for applications where avoiding the use of glycol is preferred. It is the latest addition to the company’s TZ D air-cooled free cooling chiller range which employs the latest technology to deliver top performance across a wide range of capacities from 180 to 2150 kW.

These free-cooling products are a popular solution for comfort, process and critical cooling applications where the outdoor ambient conditions are between –20°C up to +55°C and supply water temperature is –12°C up to +30°C.

Free cooling
The new EWFH/S/D-TZ D models are designed with a fully integrated free cooling system and the control system enables free cooling operation when the outdoor air temperature is low enough to cool the fluid returning from the system to the chiller.

The range is available with a choice of three refrigerants: R-1234ze, R-513A and R-134a and in four efficiency levels based around its single screw compressor design.

The chiller also benefits from the use of one or two independent refrigerant circuits and each compressor is equipped with a Variable Frequency Drive (VFD) which offers greater reliability whatever the outside conditions and adjusts the operating patterns to closely match demand.

The units have a considerably smaller footprint than similar products on the UK market and this helps with siting and installation as well as being a helpful space saving solution for end users.

Remote monitoring is also available directly from the unit controller via DAPUK’s cloud-based tool Daikin on Site (DOS). This provides real-time data as well as historical performance so operators can make any necessary adjustments to maintain optimum performance and any problems can be dealt with before they become serious.

These chillers can also be integrated into a modular system comprising up to eight separate units operated together by Daikin’s Intelligent Chiller Manager (iCM) feature.

www.daikinapplied.uk