PRODUCT SNAPSHOT
Air-cooled inverter scroll chillers from LG
LG has launched a range of air-cooled, inverter scroll chillers into the UK market.
T
he new heat pump and cooling only options, are available in 60kW, 123kW and 185kW (cooling capacity) models. The new chiller range from LG is siad to off er superior performance and alongside industry energy effi ciency in ‘part-load’ conditions, the Inverter scroll chillers have EER 2.65 / COP 3.2 / ESEER 4.79.
The range is suitable for applications where space is an issue – these chillers are compact, with a foot print area of only 4.9m2 , ideal where space is at a premium. The LG units feature low noise – at just 68dB(A) and can off er reduced noise levels at night, simply by adjusting the fan RPM.
HVAC systems are generally sized at their peak
effi ciency when they are working at maximum capacity, which only occurs less than 5%of the systems operational time. This is highly ineffi cient when most units operate mainly at partial load. So it is important to check part-load effi ciency. At part-load, when cooling output can be reduced, inverter chillers can operate linearly with a wide operational range, becoming more eff ective than chillers operating at a constant output. Effi ciency can clearly be improved whenever the compressor speed can be reduced to more closely match the load.
The compressors include the implementation of LG’s own patented HiPOR technology (High Pressure Oil Return) and vapour injection compressor return as seen in their VRF systems. The system eff ectively resolves the issue of compressor energy wastage, providing excellent operational savings and a wide operating range of 15 – 125Hz.
Equipped with LG’s exclusive Ocean Black Fin anti-corrosion coating, the inverter scroll chillers heat exchanger is protected to reduce the eff ects of corrosion normally found in coastal and industrial environments. The 2-part coating consists of a black epoxy resin, providing
52 October 2017
LG IS Chillers Thorpe Spa Hotel, Leeds.
the resistance – and a hydrophilic coating to minimise the accumulation of moisture, which would accelerate any chemical reaction. The durability provided from Ocean Black Fin prolongs the product’s life span in the most challenging environments, paving the way for exceptional, long-lasting performance and improved heating performance.
The simple design of the air-cooled system allows the user to eff ectively maximise space. The chiller system can be easily extended if needed by modular design. This is a defi nite advantage in remodelling or extension work. A single unit of 185kW can be added up to a maximum of 925kW operating from one controller, or a combination of 10 units from a centralised control.
The 5” LCD touch controller is capable of a wide array of functions, including cycle monitoring, schedule control and demand control. It can also be installed at a distance of 500m from the chiller if needed. One controller can be used to control up to 5 units of chillers, saving both time and money. A maximum of 10 chillers can be controlled remotely by central controller and direct BMS communication, up to 1,850kW. Continuous heating minimises the decrease of water outlet temperature during defrosting
for multi circuit models. The back up operating system helps the entire HVAC system to continue to operate by removing compressors or system circuits from operations until repair or diagnosis is complete.
LG MV assists engineers with commissioning, monitoring and data recording of all LG systems including the air-cooled chillers.
Cycle diagrams provide an easy understanding of the product operation and coupled with built in trouble shooting guides, provides a quick and easy insight to LG’s range of products.
“The introduction of air source inverter scroll chillers equipped with our quality proven VRF technologies, compliments our current product line up, says Andrew Slater, technical research and development senior manager at LG UK. “Moving industry leading seasonal effi ciencies into a variety of applications has never been easier. With a common structure of control logic and both electrical and mechanical components, we have made the transition for service and design engineers currently working with our air conditioning products to our new chiller range a simple process.”
This air-cooled, inverter scroll chillers range is available now, here in the UK.
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