www.heatingandventilating.net
Pioneering full-scale R-32 VRF system
Air conditioning
¡ The ability to select either three-pipe heat recovery or two-pipe heat pump operation; ¡ A completely new twin-rotary compressor with liquid injection, to counteract the higher discharge temperature with R-32; ¡ A split heat exchanger and sub-cooling plate heat exchanger; and ¡ A high performance fan motor and thermodynamic circuit. These innovations contribute to a efficiency of up to 8.9 Seasonal Energy Efficiency Ratio (SEER) for cooling, and 4.67 Seasonal Coefficient of Performance (SCOP) for heating. Key to the application of R-32 is ensuring safe
operation. This was a design priority and is ensured by the use of an advanced refrigerant leak detector and shut-off valve system. To ensure regulatory compliance at the design
stage, equipment selection software takes account of mandatory requirements, based on floor area and refrigerant quantity. For each proposed project design, it gives installers and consultants full guidance to ensure regulatory compliance and provide total peace-of-mind. For system designers, a new generation of
The Variable Refrigerant Flow (VRF) segment is one of the most competitive areas of air conditioning technology. David McSherry, head of sales for Toshiba Carrier DX, reports on a breakthrough in the use of lower GWP refrigerants, that dramatically reduces equivalent carbon emissions for buildings
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ntroduced in the UK around three decades ago, VRF systems have grown rapidly in popularity and displaced conventional forms of cooling and heating buildings, as their range of application has widened. At the smaller end of the scale, compact VRF-
style systems are increasingly replacing standard splits and multi-split systems for use in small and medium size offices and shops. Up the scale, the introduction of higher capacity modular systems with extended pipe runs and sophisticated controls has enabled VRF technology to take significant market share in tall and large buildings.
By displacing conventional equipment above and
below its initial application range, VRF technology has pretty much conquered all before it, and for a number of years has accounted for a growing
Left: David McSherry, head of sales for Toshiba Carrier DX
Below left: SHRM Advance
innovative flow selector units with up to 12 ports provides enhanced flexibility and optimises the ability of SHRM Advance to deliver simultaneous cooling and heating. This is controlled automatically, enabling seamless energy transfers between areas of the building requiring heating and cooling, ensuring a comfortable and productive indoor environment at all times, whatever the weather outside. An advanced heat recovery function provides heat to the indoor unit with minimal input from the condensing unit, further improving energy efficiency and helping to minimise carbon footprint. If required, SHRM Advance can also be customised to operate as a two-pipe heat pump system. For installers, the fully packaged SHRM Advance
share of the UK air conditioning segment. Now, with the arrival of Toshiba’s latest generation SHRM Advance, the industry has access to a complete range of full-scale, high performance heat recovery VRF systems which operate on lower GWP refrigerant R-32. Operating on R-32 enables the system to deliver
a reduction of up to 80% in equivalent carbon emissions. This is due to the combination of lower GWP and reduced refrigerant charge possible with R-32, compared with similar capacity systems operating on R-410A. As the drive towards Net Zero intensifies, SHRM
Advance enables building owners and operators to significantly reduce their carbon footprint, while reducing operating costs and improving comfort conditions for occupants. It incorporates a number of technical innovations that help improve performance and boost energy efficiency. These include:
is available in 8 to 24HP capacity units, providing flexibility to meet the needs of any commercial building project. A new compact chassis height of just 1.69 metres helps integration on site, while it is possible to connect up to 69 indoor units per system. A full range of 13 different types of indoor unit
are available, from 0.3 to 10HP capacity. As well as conventional indoor units, SHRM
Advance is available with a fresh air ventilation duct and a medium temperature water module. Supported by a 70 to 200% diversity ratio, full system customisation is possible to overcome site- specific project constraints. For applications requiring enhanced levels of indoor air quality, one-way and four-way cassettes offer Plasma/Ionizer air purification, while the highwall unit has an ultra-pure filter. The world is heading towards a carbon-neutral
future. The SHRM Advance enables commercial building owners, consultants and installers to contribute to the decarbonisation effort. For both new-build and replacement projects, the system is a major step towards Net Zero.
DOWNLOAD THE HVR APP NOW September 2022 31
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