FEATURE
INCORPORATING COLD CHAIN
requirement for consolidation. The
ITALY
of 185kW. This solution is said to bring Officials also said the store would be
Carel reported on a transcritical CO 2 energy savings during the summer of used for on-site training of technicians
2.0 to serve the company's 75 000m 3 cold store in Belluno, Italy. The refrigeration up to of 25%, and in winter, via the heat store plant is making impressive financial system uses CO 2 for medium and low recovery system that provides heating regarding working with CO 2 . James
Darby, technical engineer James
inside the building. Darby of EcoChill, says that in the few
installation of two off 300kW Azanefreezer
and environmental savings. The site is set to
temperature in a direct expansion
cut carbon emission by 453 tonnes of CO 2 / approach. An Epta control manages
year and energy costs by GBP160,000 the system.
(R3-million)/year compared to the UK's
In the broadest sense, Carel explained
'Best Practice' guidelines. The project the transcritical cycle this way: “In the
was named 'Refrigeration Project of cycle that is defined as transcritical,
NEW ZEALAND
months it first started running, the store
is very energy efficient. Although the
What was called New Zealand’s total amount of refrigeration in the
first transcritical CO 2 refrigeration supermarket has been increased, the
supermarket came on-line in power required to run the system has
Auckland. The company Resource been reduced. In addition, the new
the Year' at the 2019 National ACR and the normal condensation typical of Heat Pump Awards. One of the reasons chiller cycles using the most common Star was able to deliver the Lineage refrigerants is replaced by a heat Logistics project so successfully was its exchange between the refrigerant, Azanefreezer 2.0 – which was awarded which is at the higher pressure than the SOUTH AFRICA
'Refrigeration Product of the Year.' critical one and the cooling fluid. In The 22 000m² new Evergreens Fresh
The Lineage Logistics Azanefreezer transcritical operation, there is no phase is a modular, air cooled, low charge change from gas to liquid but only the packaged ammonia freezer and its decreasing of the temperature of a gas unique design allows for a reduction that is gradually denser. The maximum of the system's ammonia refrigerant operating pressure is no longer linked charge of up to 96% when compared to the condensation temperature but to traditional pumped recirculation is instead controlled by means of the ammonia systems. assembly comprised of a valve and a
The Refrigeration Product of the Year
was also awarded as Product of the
liquid receiver.”
Famila supermarket in the northern
Data Management said it designed a
monitoring system to optimise energy
consumption to the mechanical system.
CO 2 as a
refrigerant has
been a part of
the refrigeration
landscape for close
to a decade.
system provides the store with free hot
water and free store heating in winter.”
Market in Kempton Park, Johannesburg
installed the largest CO 2 installation in the
local commercial sector last year. The
Evergreens site was built from scratch to
cater to the local community who live
in nearby Thembisa and also work in this
predominantly warehousing and industrial
businesses area. Commercial Refrigeration
Services (CRS) pitched the CO 2 option
to Evergreens as the size of the project
Year. According to judges, it set a new Italian town of Lonigo utilises an meant that it fell into a gap where it is
benchmark in chiller performance, with environmentally sustainable food large enough for it to be cheaper than
efficiency figures up to 146% higher than refrigeration system, using a zero-impact the European EcoDesign Directive for low This was a retrofit project and was in gas, while at the same time ensuring temperature cooling, up to 100% higher response to new legislation in the country the highest efficiency on the market. designed to encourage switching away Not only was the capital expenditure less
for comfort cooling chillers, and up to The 2 300m² store employs an eight from HFCs. The old system was pulled out than the alternatives, but CO 2 provided
74% higher for high temperature chiller compressor Arneg Booster transcritical rack, supplying over 50 refrigerated and replaced by two CO 2 packs. One was the benefit of being more energy efficient.
applications.
The ultra-efficient, low charge
a booster system providing cooling to the
a synthetic-refrigerant solution and small
enough to be cheaper than ammonia.
“The client was looking for a future-
cabinets – 44 medium temperature low temperature side and some medium proof solution and after considering
ammonia chiller has delivered incredible and 13 low temperature. All the temperature equipment. The remainder of the environmental impact of different
energy savings and reduced carbon cabinets are equipped with Carel’s the medium temperature load is cooled refrigerants and the phase-out and
emissions for the country's top food MPX PRO electronic controllers. The CO 2 by a second C02 pack. The system is linked phase-down of greenhouse gases,
producers, temperature-controlled
compressor rack is controlled by Carel’s to a heat recovery system which draws storage, pharmaceutical, petrochemical they decided that CO 2 was the better
pRack pR300T, and three Carel EmJ energy from both packs to heat the retail option,” explains Maurice Robinson,
and ice and leisure companies. modulating ejectors for a total capacity area and provide hot water. director of sales and marketing at Sphere
COLD LINK AFRICA •
March/April 2020
www.coldlinkafrica.co.za
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