Page 30 - Climate Control News Magazine April 2022

Chillers
Achieve flexible capacity with modular units
WITH GREE’S A Series modular air cooled inverter chillers users can combine different units to achieve their required heating or cool- ing load.
Models range between 65kW and 249kW. Com- bine up to eight of the 130kW models, 160kW and 249kW or 16 of the 65kW and 80kW models to achieve a massive 1,990kW of cooling capacity.
The Gree chillers were recently installed at Margan Winery in the Hunter Valley, by local contractor J&H Commercial Services.
To meet the site’s wine processing and chill- ing processes, 4 x LSQ065 Gree inverter Chill- ers were specified and set up to run in a modu-
lar configuration, giving around 160kW at process conditions.
The system included the Gree advanced mod- ular controller which looks at the four chillers as one chiller for closer capacity control and energy efficiencies. All four chillers operate at 52 amps per unit at full load.
The Gree controller can control up to 16 units and with Gree’s Free Master connection there is timely communication with all units and a fault on one will not affect the operation of the other units. Being inverter chillers provides added flexibility during peak and off-peak production.
Gree Chillers include technician friendly tech-
nology for straight forward installation and commissioning. The range is suitable for new builds or retrofit to existing buildings and appli- cations where redundancy is required, such as restaurants, office buildings, theatres, gyms, shopping centres and apartments.
Kirby has a team of dedicated engineers on hand to assist with any selection enquiries.
Contact Kirby HVACR on 13 23 50.
ABOVE: This installation has been set up to run in a modular configuration.
ABOVE LEFT: Margan Winery in the Hunter Valley, NSW.
Faster heat transfer reduces energy use
SUNWAY UNIVERSITY, SUNWAY Innovation Labs (Sunway iLabs) and Daikin Refrigeration Malaysia are trialling graphene-based nano-flu- id in industrial chillers to reduce energy con- sumption.
Sunway University said the chiller had reduced daily energy consumption by up to 10 per cent (kwH) consistently over a trial period of one month.
“THE GRAPHENE BASED INVENTION HAS PROVEN EFFECTIVE IN REAL LIFE TRIALS.”
The nano-fluid results in almost 40 per cent faster heat transfer in a much shorter period of time, according to the trial results.
The chiller consumes less energy as it reaches the setpoint temperature faster.
Chillers are one of the largest electricity con- sumers in a building accounting for up to 40 per cent of a building's total energy use.
The university said the proprietary heat trans- fer nanofluid which improved energy efficiency
in industrial applications was developed by Sun- way University's Graphene and Advanced 2D Materials Research Group (GAMRG).
Sunway University head of GAMRG and prin- cipal researcher of the project Professor Mo- hammad Khalid said the new graphene-based nano-fluid has better cooling performance, lower electricity consumption, extends life of heating, ventilation and air-conditioning (HVAC) equipment while keeping maintenance costs down.
He said air conditioners use refrigerants and consume large amounts of electricity, resulting
in gaseous emissions that contribute to global warming and ozone layer depletion.
"Our graphene-based invention is an energy- efficient heat transfer nanofluid that has been proven effective in both the laboratory and real life and it is safe for use in industry chillers,” Khalid said.
Sunway iLabs is looking for partners to com- mercialise the graphene based nano fluid.
This includes companies who would like to adopt this technology to improve their energy utilisation and to move a step closer to becoming a carbon-neutral organisation.
CLIMATECONTROLNEWS.COM.AU
LEFT: Sunway University, Malaysia.
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