Energy-Saving Equipment 29 Modifiable chiller has all the mod cons


PROCESS COOLING specialist IsoCool, has introduced an adaptable, efficient and budget-friendly process air-cooled chiller to the UK market. Built with performance and flexibility in mind, the Dy-nax combines the highest standards of construction with a modifiable design, allowing the chiller to fulfil a wide range of cooling requirements, from the most basic through to free and adiabatic cooling. As a result, the Dy-nax is an ideal solution for almost any cooling system.


Beginning with the standard Dy-nax, units feature brazed plate evaporators, and are built without an integral pump and tank group.


This enables centralised cooling plant to increase cooling capacity in the most cost-effective way possible, it also makes the standard chiller price-competitive. If required, the Dy-nax can be easily supplied with shell and tube, plus a complementary GRP pump and tank group is also available.


Highly efficient, all versions of the Dy- nax boast a range of energy-saving features. Variable speed axial fans with external rotor, for example, are offered as standard, and feature larger-diameter blades which are optimised to achieve high air flow rates with the lowest electricity consumption. Brushless fans can also be incorporated to further increase energy savings. To significantly boost the energy- efficiency of the Dy-nax, the chiller can be supplied with a Dcooler air blast cooler to deliver free cooling. Here, an IsoCool pump group fitted with a three-


way valve provides the energy saving automatically. The aim is to precool the water flowing into the heat exchanger coils of the Dcooler by using low ambient air temperature, thus limiting the energy consumption to only a few fan motors.


The Dy-nax chiller remains on stand-by, providing a substantial energy reduction.


Manufacturers in warmer climates can also benefit from increased savings thanks to an adiabatic version of the Dy-nax. When the ambient reaches 32°C or more, the adiabatic pack on the chiller introduces water to the internal matrix, precooling the air temperature. This increases the seasonal energy efficiency of the unit to 5.15. Exceptional build quality is apparent throughout the Dy-nax, as the chiller boasts a range of innovative features. For example, the cooling circuit is constructed from high quality copper pipes and refrigeration components, including first class control and safety devices, to meet the most demanding industrial applications. During operation, the evaporator is prevented from freezing thanks to two safety devices: a flow switch regulates the minimum flow rate; and an anti-freeze thermostat switches the compressors off if the water temperature is too low. Electronic expansion valves are fitted standard, and in the water circuit, the inlet and outlet chilled water connections


are situated opposite the electric control connection, so as not to interfere with access to the electric panel and allow easy connection to the process water circuit. What’s more, the outlet water temperature can be as low as 5°C without any need for glycol.


Thanks to heavy-duty galvanised steel construction and special cataphoric and epoxy coatings, the units can be located outdoors without shelter. Condenser fins can also be coated with anti-corrosion paint or made from aluminium with a pre- coated protective barrier.


If the chiller is to be located near a coastal region or is used for aggressive industrial applications, units may be constructed from stainless steel. Standard Dy-nax units are available from 80kw to 690kw, while shell and tube versions start from 180kw.


Freshly squeezed refrigeration


WILLIAMS REFRIGERATION’S slimline version of its range of Jade gastronorm counters offers all the features of the established Jade counters, but slimmed down to a depth of just 500mm, making it suitable for tight spaces.


It is available in two- and three-door versions, as a refrigerator (+1/+4°C) or freezer (-18/-22°C). The two-door has an optimum capacity of 242 litres, the three- door 354 litres.


The Jade Slimline is also the first model in its range to be fitted with Williams’ new energy-efficient compressors. The smaller compressors offer an improved heat exchange, a reduced risk of refrigerant leakage and will save on average up to £100 pa on an energy bill, compared to standard units. The new counters have many more energy-saving features, including CoolSmart controllers. As well as saving energy, by only running the refrigeration


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system when it is required, the CoolSmart monitors the fan, defrost, compressor and probe, alerting users to potential problems and ensuring that the critical storage temperature is not compromised. To further reduce running costs, all doors are self-closing and fitted with easy to clean, replaceable magnetic balloon gaskets. The optional two- and three- drawer versions further reduce energy consumption and the high performance 75mm insulation, which has low GWP and zero ODP, offers market-leading thermal efficiency.


The Jade Slimline is also available with hydrocarbon refrigerant – providing the ultimate ‘green’ solution. The new counter is designed for effective operation in high ambient 43°C environments.


It features a tough stainless steel exterior, which is proven to withstand the rigours of day-to-day operation in the


busiest kitchens. The introduction of the new compressors has enabled Williams to redesign the layout of the refrigeration system.


Coupled with the ability to completely remove the cassette system, this makes the unit easy to service and maintain. The integral handle provides a non-slip ‘grab’ on the door, a ‘must’ in a busy kitchen environment.


It is delivered to site with heavy duty, non-marking braked swivel castors, which ensure both mobility and stability.


ACR News January 2014


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