Wojciech Polak Biedronka - Technical Director Matteo Dal Corso CAREL - Application Manager

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Improving energy efficiency in
Europe with CO2 booster packs
Experiences and Projects in Poland with
Biedronka retail supermarket chain
Wojciech Polak
Biedronka - Technical Director
Matteo Dal Corso
CAREL - Application Manager

2. This document and all of its contents are property of CAREL. All unauthorised use, reproduction or distribution of this document or the information contained in it, by anyone other than CAREL, is severely forbidden.
Over 2900 stores in 1100 towns
16 Distribution Centers
4 million customer visits per day
67 thousand employees
50 billion PLN revenues in 2018

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4. This document and all of its contents are property of CAREL. All unauthorised use, reproduction or distribution of this document or the information contained in it, by anyone other than CAREL, is severely forbidden.

5. This document and all of its contents are property of CAREL. All unauthorised use, reproduction or distribution of this document or the information contained in it, by anyone other than CAREL, is severely forbidden.
Common store configuration:
R744 compact booster rack:
 MT Cabinets - 10 to 12 pcs
 MT Cold room - 1 pcs
 LT Cold room - 1 pcs
R290 plugins:
 MT Coolers - 10 to 11 pcs
 LT Freezers - 10 pcs
Biedronka stores
Remote monitoring and configuration
Remote monitoring project
 2018: start of remote monitoring project with CAREL
RemotePRO enterprise
 34 stores already connected  continuing to extend
stores connection
 pRack 300T and MPX PRO data collection with CAREL
Boss supervisory system
 Oven, AC system, Lights and Refrigeration real energy
consumption measurement

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Compact CO2 booster rack technologies
Background
Reciprocating - standard option for compressor racks
Multi DC first concept
unit in laboratory
First trial store
in Warsaw Start of solution
deployment in Europe
CAREL oil check
system
DC Rotary – new option for racks
Units 2.0

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Loads distribution
OVEN HVAC LIGHTS REFRIGERATION
Stores selection and characteristics
REF: 40,8 %
Store
Compressor
Technology
Compressors
number
MT Loads* LT Loads**
ZY - Żyrardów Mickiewicza Reciprocating MT: 2x, LT: 1x 29,8 kW 2,9 kW
MI - Mińsk Mazowiecki Reciprocating MT: 2x, LT: 1x 29,8 kW 2,9 kW
GD - Gdańsk Norwida DC Rotary MT: 3x, LT: 1x 27,0 kW 3,8 kW
WL - Włocławek Polna DC Rotary MT: 3x, LT: 1x 24,9 kW 3,1 kW
* Tsuc_MT = -8 °C
** Tsuc_LT = -32 °C
Stores characteristics
 Same sizing and installation criteria
 Same loads distribution
 Same sales area
 Same opening hours

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0
100
200
300
400
500
600
10,00 15,00 20,00 25,00 30,00
ZY - Recipe
MI - Recipe
GD - DC Rotary
WL - DC Rotary
Refrigeration active energy VS external temperaturekWh
External temperature [°C]
From 16 to 25 °C
- 42,2 % *
- 20,6 % *
* compared to avg. Recipe stores
energy consumption

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Refrigeration energy saving comparison
(kWh/n°days)/kWevap
Refrigeration cost saving estimation *
Reciprocating -
DC Rotary 5,760 €/year
Refrigeration avg. daily costs *
Reciprocating 53,82 €/day
DC Rotary 38,04 €/day
* Electricity average price in Poland: 0,135 € / kWh (www.sorgenia.it)
56 days, July - Sept. 2019
-1%
-38%
-8%
0,00
5,00
10,00
15,00
ZY - Recipe MI - Recipe
GD - DC Rotary WL - DC Rotary
20,7°C
Refrigeration avg. energy saving
Reciprocating -
DC Rotary -22,8 %
 Theoretical models and laboratory tests estimate an
average saving of 15% for the DC Rotary units
(data presented in Atmo EU ‘18)
 Data analysis on real stores confirm the energy saving
trend for the DC Rotary installations
 This saving is not linear and other factors influence the
store’s energy performances, for example:
o location’s climatic profile
o building features and insulation
o store’s influx of people
20,5°C 21,3°C 22,5°C [avg.T]

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Conclusions
 Theoretical and laboratory data presented last year are now supported by the first real stores
analysis.
 All DC Rotary stores have a lower energy consumption compared with those equipped
with Recipe compressors
 Data analysis is not finished yet, we are extending the number of monitored stores and the
database for more detailed energy saving calculations.
 With the current database we can estimate that is possible to reach an average saving of
15% for the stores with DC Rotary Technology.
 Store’s analysis is influenced by other important conditions: location’s climatic profile, building
features and insulation, store’s influx of people.
 DC Rotary technology has also other important benefits: overall compactness of the unit,
low noise level and improved reliability with new oil check option.

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