This document discusses a propane mini chiller system called INFINEE. It has an external refrigerant section for propane that is separated from the internal water/glycol section for safety. It has an inverter compressor and pump for high efficiency. Propane has a low GWP and the system has a simple and safe design to provide efficient cooling capacity down to low temperatures while using a natural refrigerant.

1. Propane chiller
up to 30 kW
►Safety design strategy
►Efficiency
PROJECT ECOFRIENDLY
MINICHILLER

2. ATMOsphere Europe / Warsaw / 16-17 October 2019
Final refrigerants R290 CO2 NH3 HFOs
GWP (500) <3 1 0 <4
Natural fluid üüü üüü üüü ûûû
System complexity ü ûûû û üü
Efficiency üüü ü üüü üüü
Toxicity ü û ûûû ü
Flammability ûûû üüü ûû û
Lifecycle cost üüü ü üü ?
REFRIGERANT CHOICE

3. ATMOsphere Europe / Warsaw / 16-17 October 2019
Refrigeration water chiller
INFINEE

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INFINEE
EFFICIENT
} Great refrigerant
} 100% inverter unit
SAFE
} External location
and glycol
} Optimized design
Simplified maintenance:
} Standard design and pressure (type R404A)
} Most of maintenance done on the hydraulic module
In short :
PROPANE
} Natural
} GWP < 3

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CONCEPT
Water &
glycol
inside
Propane
outside
Safe by concept

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PLUG AND PLAY
Factory fitted and tested:
Tecumseh Control
100% inverter driven
o compressor
o pump
Complete hydraulic
module
Refrigerant charge
and testo Fitted and ready to go
o Easy start-up (setpoints,
glycol rate)
o Push on to start
o Energy savings
o Fine water temperature
control
o No need for buffer tank
and reduced glycol
expenses
o Reliability against leakage
o Limited refrigeration work
o Simplified piping work
o Simplified electrical work
(pump included)
o Expansion vessels,
strainer, isolation valves

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Passive protections:
SAFETY STRATEGY
Openwork panels
Ducted HP + LP relief
valves
Fan to condenser
Air-flow
Hydraulic Section
Electrical
section
3 Compartments
Refrigeration Section

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REFRIGERATION
Ducted relief valves HP + LP
Pressure + temperature sensors
Safety Switches (electromechanical)
Inverter driven compressor (25 to 85 Hz)
Electronic Expansion valve
EC fans
BPHE liquid/vapor separator
BPHE Evaporator
Chiller refrigeration design
PID Control

9. ATMOsphere Europe / Warsaw / 16-17 October 2019
Most maintenance is on the water.
►Safe
- isolated from Refrigeration section
State of the art hydraulic
HYDRAULIC
►Fully supplied with:
- Inverter pump
Delta "T" control
- Strainer (Water filter)
- 3 isolating valves
- 6 liter expansion vessel
- 3 pressure sensors
- Insulation, …

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► Refrigeration
► Compressor inverter
► Variable speed fans
► Electronic expansion valves
and sensors
► Hydraulic
► Pump inverter
► Delta Temperature Control
EFFICIENCY
R404A
R404A
R449A
R449A
R452A
R452A
R290
R290
80%
85%
90%
95%
100%
105%
110%
115%
Capacity Efficiency
OAT 32°C / lwt -8°C
Full Load Part Load

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Cooling capacity and COP
EFFICENCY
Outside
Air Temp.
Full load 85 Hz Part Load 70 Hz Part Load 50 Hz Minimum Load 25 Hz
Cooling
capacity COP
Cooling
capacity COP
Cooling
capacity COP
Cooling
capacity COP
46°C 17.4 kW 1.56 14.9 kW 1.69 11.3 kW 1.86 6.2 kW 2.04
38°C 19.6 kW 1.87 16.9 kW 2.02 12.9 kW 2.24 7.1 kW 2.47
35°C 20.5 kW 2.00 17.7 kW 2.16 13.5 kW 2.39 7.4 kW 2.64
32°C 21.4 kW 2.13 18.5 kW 2.30 14.1 kW 2.55 7.7 kW 2.83
25°C 24.9 kW 2.45 21.5 kW 2.65 16.3 kW 2.95 8.8 kW 3.31
15°C 28.0 kW 2.99 24.1 kW 3.26 18.9 kW 3.69 9.5 kW 4.29
5°C 30.7 kW 3.75 26.2 kW 4.20 19.3 kW 5.03 9.6 kW 6.62

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Flower industry
} Fine temperature control
Collective catering
} Versatility
Cheese maturation
cellar
} Fine temperature control
First on-going Projects
APPLICATIONS
Interesting for all type of refrigeration Segments

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INFINEE
EFFICIENT
} Great refrigerant
} 100% inverter unit
SAFE
} External location
and glycol
} Optimized design
Simplified maintenance:
} Standard design and pressure (type R404A)
} Most of maintenance done on the hydraulic module
In short :
PROPANE
} Natural
} GWP < 3