FEATURE REPORT PRODUCT NEWS


Daikin Applied


Daikin Applied UK has launched a polyvalent unit capable of delivering simultaneous cooling and heating in commercial and industrial applications.


Polyvalent, or hybrid heat pump, systems are proving increasingly popular because of their ability to cope with complex building requirements in a wide range of climatic conditions while also minimising environmental impact. Daikin’s multipurpose four-pipe EWYS-4Z


employs inverter-driven single-screw compressors and operates with the low global warming potential (GWP) refrigerant R-513A. Its performance is also boosted by highly energy efficient variable frequency drive (VFD) and variable volume ratio (VVR) features. The polyvalent units deliver capacities from 400 to 800 kW in cooling and heating mode with a total energy efficiency ratio (TER) as high as 8.00. They operate in outdoor temperatures from -18°C to +50°C and provide chilled water in a range between -8°C (with a water/glycol mixture) to +20°C. Heating water temperature is available from +30°C to +60°C. The Daikin EWYS-4Z units are an extremely versatile way of


controlling indoor temperature and are well suited to buildings with variable temperature needs, such as hotels, hospitals, and large offices. They capture heat recovered when producing chilled water, which also makes them a popular addition to the industry’s range of solutions for reducing carbon emissions from buildings. The range is also available with noise attenuation achieved


through lower fan speeds and a specially designed soundproof compressor cabinet. Enhanced insulation on the refrigerant pipes and special compressor connections also significantly reduce vibration. The EWYS-4Z is equipped with two Shell & Tube heat exchangers on the waterside: one always operates as an evaporator (cold heat exchanger) and the other as a condenser (hot heat exchanger). Copper-aluminium (Cu/Al) fin and tube coils are used to dissipate excess cooling or heating energy. These design features allow the Daikin polyvalent units to simultaneously meet cooling and heating requirements by following two setpoints simultaneously all year round. Unlike reversible heat pumps, a multi-purpose unit does not


require seasonal changeover and by controlling the two refrigerant circuits independently, it can respond quickly and accurately to a building’s cooling and heating demand patterns. X www.daikinapplied.uk


Swegon


As the environmental impact of the building industry increases in focus, the call for sustainable innovations has never been more pressing. Swegon is therefore presenting its first wooden air handling unit that could redefine the industry’s approach to reducing carbon emissions.


When the Gold air handling unit was launched in 1994, it was an all-new concept that transformed industry standards. With its new design and features, it set a new benchmark for energy efficiency and performance. Now, three decades later, embodied carbon is increasingly in focus, and the first wooden concept air handling unit is presented. So far, two functioning prototypes of wooden Gold air handling unit, size 005 have been built, where the traditional casing of conventional steel has been replaced by cross-laminated timber (CLT). By replacing the steel, Swegon managed to reduce the CO2 footprint by 40%. For a larger air handling unit, the saving would be even greater. “By rethinking material choices and challenging industry norms,


we are driving the future of sustainable building solutions and this concept is an important step in testing the limits for the industry,” said Martin Ottersten, Innovation and Knowledge Centre at Swegon. “We have already introduced recycled steel inside our Gold units to minimise environmental impact. With this concept wooden air handling unit we take a significant step further, in line with our ambitions within the RE:3 concept to be in the forefront of reducing embodied carbon of products,” said Annika Sedwall, head of product management, Kvänum. The unit is a concept product that is not on the market for sale, but will be evaluated and used in discussions around future alternative materials. X www.swegon.com/uk


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