Last 28th September Klima-Kälte-Tag gave us the unique opportunity to talk to a wide audience about the newest innovations for supermarket refrigeration. With a presentation entitled “Nachhaltige Kälteerzeugung in Supermärkten” Ronald Mayer, sales Manager Refrigeration & Retail D-A-CH-NL, discussed about Heos, our revolutionary high efficiency system solution that combines the use of a waterloop system with DC inverter technology.

1. Sustainability & energy efficiency
Sustainable solutions for refrigeration in retail market
With decentralized semi‐plug‐in‐waterloop‐systems

2. Waterloop systems
Waterloop systems in short
• Simple plug‐in/semi plug‐in refrigerated units
• Refrigeration units fully contained in box or
integrated into the cabinet/cold room
• Water condenser on‐board
• Water loop system for reject outside the
condenser heat
• Hydraulic piping, Pumping station & external dry
cooler

3. Continuos Modulation
• DC inverter driven compressors
• EEV stepper electronic expansion valves
• Electronic controls
• Monitoring systems

4. is Energy Efficiency
Continuos ModulationContinuos Modulation
DC technology EEV Controls
• One compressor each cabinet fully
working independently from the
others
• Very wide modulation range to
always fit the cabinet cooling
capacity
• Maximum energy efficiency at
part load
• Stepper electronic expansion
valves
• Continuos and precise control of
evaporator feeding
• Equi‐percentual profile for perfect
control in part load operation
• Superheat setpoint modulation
based on variation of cooling
capacity demand
Opening %
Cooling capacity
CAREL ExV
• All in one controller able to drive
all components of the
refrigeration system
• Advanced management of the
refrigeration cycle
• Synchronization of speed drives
and EEV to maximize energy
efficiency and food temperature
control
• First level data mining

5. is Energy Efficiency
• All compressors run always at their
own best working conditions
independently from the others
• Optimum stability control,
continuous modulation able to
perfectly match the requested cooling
capacity
• Real defrost on demand based on real
working conditions, not time
scheduled based on cooling load

6. is Food Quality
Perfect food temperature control
• Food always stable at desired temperature
Real continuos modulation of cabinet cooling
capacity
• Product temperature is the target
Every single cabinet, working independently
from the others, to fully match the product
temperature
• No more temperature fluctuation
Not anymore only average product
temperature but fluctuation removal
End user experience
2
Extra days
shelf life

7. is Fast installation
40%
Commissioning
saving
Plug‐in cabinets [OEM]
• Finished unit ready to start
• Factory tested units
• Industrial design & quality
• Full control of production
processes
Plug‐in cabinets [OEM]
• Finished unit ready to start
• Factory tested units
• Industrial design & quality
• Full control of production
processes
Waterloop
• Plastic pipes and connections
• Flexible connections
• Hydraulic system
• Water circulation
Waterloop
• Plastic pipes and connections
• Flexible connections
• Hydraulic system
• Water circulation
Optimization
• Fully qualified and optimized in
factory
• Default features and settings
• No need of extra field job
Optimization
• Fully qualified and optimized in
factory
• Default features and settings
• No need of extra field job
On site job
• No weldings on field
• No vacuum and charge on field
[precharged units]
• Water and electric connections
On site job
• No weldings on field
• No vacuum and charge on field
[precharged units]
• Water and electric connections
Fast
Start
Up

8. is Maintenance reduction
Maintenance & Reliability
• Full and continuos control of the units
• Easy understanding of system performance thanks
to deep information available
• Full monitoring of all working conditions, warning
and detailed alarms
• Advanced algorithms for preventive diagnostics
• Real time unit overview and COP calculation
• Compressors fully qualified by Carel lab:
perfomances, safeties, envelope management

9. is Easy
The right thing for every need
• From user interfaces to synoptic views to address the right information to the right users
• Technology and alghorihtm procedures for an easier user experience
• Conceil the complexity behind

10. Heos
Dashboards
Heos
Dashboards
Savings:
• Perfomances comparison with traditional technologies
• Energy saving figures: from store to cabinet/cold room level
is Deep Analysis
Efficiency: Preventive Diagnostics
• Detailed cabinet by cabinet comparison
• Cabinets perfomances full ranking
• Groups statistical analysis
Food quality control
• Comparison with traditional technologies
• Statistical analysis of set matching

11. is Flexibility
Self contained watercooled units
• Easy layout change
Possibility to easly move cabinets inside the
supermarket:
• Flexible sales area
Easy installation or deinstallation of new/promotional cabinets
• High investment recovery in case in case of store relocation
Critical components fully contained into the cabinet

12. is Wider sales area
No more space dedicated to machine room
• Space saving mostly for small/medium store formats in city centres
Profit increase due to wider sales area
• Rental cost reduction
i.e. 20m2 in big city centre
 4k€ saving per year
Machine room
Small format store layout example

13. is AC Integration
Easy integration with air conditioning systems
• Possibility to use the waterloop as cold source of an
additional heat pumps
• No influence on cabinets performance
• Efficient working condition of heat pump using heat
generated by cabinets
• Easy add on on existing systems

14. is Environmental friendly
Now available with
Natural Refrigerants

15. is Natural
CO2 transcritical
Simple transcritical circuit design
• Single electronic expansion valve system, no flash gas valve need
• High pressure and expansion valve as one
• Optimal transcritical pressure and superheat managed simultaneously
Full range of DC compressors available
• 4 different compressors sizes, up to 100rps
• Medium temperature transcritical up to 8.2kW
• Low temperature subcritical up to 6kW
CO2 as refrigerant for waterloop systems
• No charge limitation, available for all cabinets capacity range
• Efficiency boosted by Continuous Modulation
• Well known and widely used technology

16. is Natural
R290 Single Circuit
Propane [Hydrocarbons]
• Flammable refrigerant [A3], GWP=3,3
• Standard operating pressures
• High efficiency in warm climates
Single circuit for countries allowing refrigerant charge > 150g
• Already standard in some European countries
• Looking to future changes of European normatives
Continuos modulation to
• Boost cooling capacity of small systems
• Increase energy efficiency of existing ON/OFF
systems
• Improve food temperature control

17. is Natural
R290 Multiple Circuit
Propane [Hydrocarbons]
• Flammable refrigerant [A3], GWP=3,3
• Standard operating pressures
• High efficiency in warm climates
Multiple circuit with refrigerant charge < 150g
• No refrigerant charge limitation
• Compliant with actual European normatives
Continuos modulation to
• Reduce effects of very limited refrigerant charge
• Reduce number of circuits
• Increase cooling capacity
• Reduce compressors size

18. CAREL Deutschland GmbH
Am Spielacker 34
63571 Gelnhausen
www.carel.de
Roland Mayer
Sales Manager Refrigeration
direct +49 6051 96 29 102
mobile +49 175 54 16 536
e-mail roland.mayer@carel.com