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20 years from now, people will look back and wonder at the huge amount of surplus heat that is today wasted from the cooling systems of supermarkets. The impressive amount of transcritical solutions with heat reclaim installed by now — mostly in colder climates — is only seen the tip of the iceberg. The installations have all confirmed that the refrigeration system can provide ample heat to fulfil demands for heating and hot water, eliminating the need for separate heating installations in the

Refrigerant trends

for food retail in 2016

supermarket. The heat reclaim solutions have returned energy savings of 20% or more and payback times of less than two-and-a-half years. Looking further ahead, supermarkets will not only cover their own heating demand by heat reclaim, they will move from energy consumers to energy suppliers by offering the surplus heat to the local district energy grid. The obvious advantages are new revenue streams and reduced carbon footprints for

The quest for new, green refrigerants is on. Amidst alternatives, CO2 is emerging as the most efficient, safe and clean refrigerant preferred by a growing number of global, regional and local retailers. Danfoss predicts 2016 will see a rapid increase in the number of CO2 systems and new technologies to make the ‘climate friendly’ refrigerant an attractive solution.

the supermarkets.

New technologies pave the way for CO2 refrigeration in warm climates CO2 refrigeration is progressing to warmer climates, and 2016 is likely to see a breakthrough in transcritical solutions for subtropical and even tropical climates. New technologies are emerging as energy-efficient solutions that

T

he last couple of years

year before. Driven by the F-gas regulation

have seen difficulties for

in Europe and the SNAP regulation in the US,

decision-makers in food

the installation of CO2 systems is expected

retail to make a final choice

to accelerate in 2016 and 2017 led by major,

when it comes to refriger-

global retailers.

ants and system type. Many

The market is ready for this huge trans-

refrigerant options and system configurations

formation in food retail refrigeration and the

have been battling to receive attention. Su-

required technical solutions are in place. For

permarket refrigeration has been in the envi-

the last 15 years, Danfoss and other refrig-

ronmental spotlight and it has been revealed

eration specialists have pioneered technolo-

how leakage of HFCs in centralised systems

gies for transcritical refrigeration. Today, a

is a major challenge. At the same time, energy

complete and well-tested product portfolio

efficiency has gained top priority in order to

is available for climate-friendly and energy-

save costs and reduce the carbon footprint.

efficient solutions.

From this disarray, CO2 is emerging as

help retailers reduce complexity and meet current and future regulation on traditional refrigerants in all climates. One such technology is the ejector, devised by Danfoss in close cooperation with refrigeration specialists from SINTEF. It increases the energy efficiency of parallel compression significantly and enhances the viability of transcritical refrigeration in warm climates. The ejector is still in the prototype stage, but the initial trial set-ups in 10 supermarkets have shown that the simple ejector technology can increase the efficiency of the parallel compression system significantly. Furthermore, the technology allows smaller

refrigerants for food retail. In 2015 alone,

Heat reclaim is trending in food retail refrigeration

Danfoss has seen an increase of more than

2016 will see a continued growing interest in

20% in the installed base of transcritical CO2

transcritical CO2 systems with heat reclaim.

Danfoss (Australia)

systems in supermarkets compared to the

The solution is fast becoming standard and,

www.danfoss.com.au

one of the most efficient, safe and clean

38 Sustainability Matters - Apr/May 2016

and more compact compressor packs to be installed in the first place.

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Sustainability Matters Apr/May 2016  

Sustainability Matters is a bi-monthly magazine showcasing the latest products, technology and sustainable solutions for industry, governmen...

Sustainability Matters Apr/May 2016  

Sustainability Matters is a bi-monthly magazine showcasing the latest products, technology and sustainable solutions for industry, governmen...