Nicola Dalla Rizza's speech during Chillventa 2018 on Heos sistema and the use of natural refrigerants in waterloop semi-plugin systems

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1
Hall 9
NürnbergMesse, Arbeitstitel, 16/10/2018
Chillventa Specialist Forums 2018
Chillventa Fachforen 2018

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Nicola Dalla Rizza
Application Specialist
Retail Solutions
10/2018
Natural refrigerants in waterloop
semi-plugin systems

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 Less charge of refrigerant: less CO2
equivalents in the system
 Ease of installation & maintenance
 Less leaks and lower frequency of leak
checking
 Lower operating and maintenance costs
Why Waterloop?

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

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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 accurate 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
25%
Energy saving
respect to on/off

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Temperature trends in Heos showcase (black) and waterloop with fixed speed compressor (blue)
Vs Conventional Semi-plugin ON/OFF
Project in collaboration with the
University of Padova:
 Humidity and temperature
surveillance in different shelfs
 Temperature sensor inside the
products
 Analysis of the shelf life of the
products
2
Extra days
shelf life

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Vs Conventional Semi-plugin ON/OFF
Humidity trends in Heos showcase (black) and waterloop with fixed speed compressor (blue)

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is Maintenance reduction
Maintenance & Reliability
• Full and continuos ENVELOPE management
• 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
• COP real time calculation
• Leak warnings and alarms
• Defrost on demand

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is Ease of Use
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
• Conceal the complexity behind

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Savings
• Perfomances comparison with
traditional technologies
• Energy saving figures: from store
to cabinet/cold room level
is Advanced Service
Efficiency
• Detailed cabinet by cabinet
comparison
• Cabinets perfomances full ranking
• Groups statistical analysis
Food quality control
• Comparison with traditional
technologies
• Statistical analysis of set matching
mini

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Ready with Propane and CO2: very different options for a wide variety of requirements
 High efficiency refrigerant
 Standard working pressures
 Suitable for small units
 IEC 60335-2-89 up to 150 g per
circuit (under revision within
2018, 500g will most probably be
accepted)
 Well accepted from the market
 Worries overcame on pressures
and usability
 Innovation trends ongoing
 Improved technologies for high
efficiency in warm climates
is Natural Refrigerant

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Single Circuit
MT transcritical
LT subcritical
Simple system with a EEV
Max P 60/90-120barg
Double circuit - Double stage
LT Cascade
LT different circuit options
Only high pressure stage
operate in transcritical zone
Single Circuit
Up to 150/500g
Small size loads
Multi Circuit
Up to 3 ref. Circuits
All type of loads
is Natural Refrigerant
MT/LT application
EN60079 compliant
MT/LT application
EN60079 compliant

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• Rising Interest  Natural refrigerants DC waterloop system are becoming a reality all over
the world (mainly Europe and Australia)
• High-tech solution  Potential issues on Nat Ref are solved by using the advanced Carel
solutions and our support
• Norms and technology  Clear and harmonized normative, training, best practices and
knowledge sharing are vital for the success of this new frontier for natural refrigerants
• Business Drivers  Energy efficiency is not the only driver. TCO: total cost of ownership of
refrigeration systems running for at least 10 years
• Flexible Solution There’s No unique natural choice: Propane Vs. CO2. End user can decide
the Nat Ref that fits better with its own needs
Conclusions

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Hall 9
Chillventa Specialist Forums 2018
Chillventa Fachforen 2018