TABLE OF CONTENTS

Case field Study case study – Hydrocarbon of supermarket chillers plant at a operating Hospital with natural refrigerants
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About the company
About the company
Northampton Cooling is a world-leading supplier of
large-scale The Danfoss cooling group solutions. is one of Northampton the largest Cooling Danish
is companies, market leader operating providing in: sustainable Refrigeration heating & and Air
refrigeration Conditioning, solutions Heating using & Water the natural and Motion working Controls. fluids
R290, Its Refrigeration R600a, R744 and R717. Air Conditioning division is
specialised on automatic controls, compressors and
More electronic information sensors. at:
http://www.northamptoncooling.com
More information at:
www.danfoss.com
Contact Information
Contact Information
John Smith
john.smith@northamptoncooling.com
Sandy +12 234 Gosvig 567 89
gosvig@danfoss.com
Introduction
The SDanish t Anna Supermarket Hospital in Ruisbroek Chain, Fakta was – looking owned for by a Coop technically Denmark viable has replacement
experienced
significant for the R-22 energy systems savings installed with on their site second-generation that had been running transcritical for many booster years and system. had
By consequently applying a reached CO 2
system low Fakta efficiency has levels. achieved The 10% capacity energy had savings become compared insufficient to over HFC
systems. the years but the plants could not be expanded due to a freeze from the year 2000
onwards to install new HCFC systems or expand existing ones.
The Fakta chain has 378 stores in operation where 61 of them are transcritical. Fakta
was The installation one of the provided first movers by Northampton to change to CO Cooling 2
and allowed the first to generation take several of transcritical
R22 chillers
systems out of service were installed and recycle in 2007 2000 (status kg of R22. end of The 2010). latest installation from FEBRUARY 2010
Fakta has led has to very continuously satisfying worked results in on terms lowering of supply their independence, energy consumption emissions for the reductions past 15
years, and energy first on savings, their HFC with scroll an packs average and of later 23% on OF transcritical ENERGY savings packs. As as a compared result of this to
Fakta traditional are now solutions. installing their second-generation transcritical packs where part load has
been optimized.
Similarly, the project has provided valuable insights regarding the safety of hydrocarbon
refrigerants, as well as additional requirements, including insulation. User experience
has been highly positive with the new refrigeration system complying with the
About regulations the regarding System the use of fluorinated refrigerants.
Fakta and the remote monitoring centre AK Centralen have been collecting data from
the systems for more than 15 years, since they first started optimizing the HFC pack
with low energy consumption and temperature quality as main targets.
About the System
To Whilst increase Fakta capacity installations and comply can be different, with HCFC the legislation cabinets, the pack choice and gascooler was made always in favour have of
chillers the same using arrangement. R290 (propane) Today and all systems heat pumps are standardised using R600a (iso-butane. and produced Other in batches natural
refrigerant of 5 packs with options the like same CO2 configuration (R744) for the regarding heat pump capacity, option making had also Fakta been a very evaluated good
but reference were found for energy to be studies. less efficient in the applications and the temperatures required.
CO2 may be of interest if hot water temperatures of above 85 to 90 °C are needed but at
For this case study an energy study 10 Fakta HFC systems, 10 Fakta- transcritical 1
the temperatures required in the Hospital R600a was found to be more efficient.
st
generation systems, and 10 Fakta transcritical 2 nd generation systems were analysed.
The first stores hydrocarbon looked at are (HC) identical chillers were for most installed parameters, IN 2007. but As the installations hospital has differ been
regarding expanding length over time, of pipes new and R290 number units of have bends. subsequently The maximum been pressure added. drop The in latest the
pipe installation work is in still February the same 2010 for all also systems included regardless two heat of refrigerant pumps based and installation.
isobutane
(R-600a). In addition to the 7 chillers special application chillers have been working
For the installation to be included in the data material the following criteria had to be
at different temperature levels. In total, 12 chillers are currently operating on site. The
fulfilled:
new chillers operate with x kg of R-290 in total and the heat pumps have x kg of R-600a.
• More than 4 months of operation since commissioning
The new system has been combining the cooling system with the heating system,
• Equivalent size and opening hours
which is a very obvious but not very widely used practice in most places around the
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