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Intelligent Leak Detection for HFC
Cooling Installations
Margo Parmentier
3
Cooling @ Colruyt Group
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Cooling @ Colruyt Group
>50engineers
>20cooling
technicians
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#4.
#7.
Source: Project Drawdown
HFC
Natural Refrigerant
Sustainable cooling
can curb climate change
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How does an HFC cooling installation work?
exchange cold
exchange heat
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Cooling @ Colruyt Group
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HFCs are very
carbon-intensive
Refrigerant GWP
CO2 1
R507A 4775
R290 (propane) 0.02
> 200 shops
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Leakage of HFC refrigerants accounts for
10% of Colruyt Groups total CO2 emissions in 2020
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How does an HFC cooling installation work?
exchange cold
exchange heat
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Why do we
even need
this receiver?
LS
LS
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The receiver is the key
to detect a leak!
LS
RECEIVER
LS
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LS
LS
LT
We installed a level
transmitter in OKay
Huizingen to monitor
the natural fluctuations
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Almost all other
locations only have
the 2 level switches
LS
LS
15
y
Electricity consumption Outside temperature HFC level in receiver
Wind speed
Opening hours Defrost timing
X
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Training a model
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When an anomaly is
detected, we send an
alarm to the maintenance
department
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Sending a technician
to look for an actual
leak is difficult and
expensive
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This is what the first detected leak looked like
on paper in Colruyt Zottegem in October 2020
Relative
level
in
the
receiver
Time [per hour]
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and the second leak in Colruyt Haaltert
a few days later
Time [per hour]
Relative
level
in
the
receiver
Inspection glass level
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This is what the
leak in Colruyt
Zottegem looked
like in real life
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We are able to discover leaks much
faster than before!
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leaks
detected since
October 2020
9%
leaks away before a
technician fixes the leak
with our detection system
19%
leaked away before a
technician fixes the leak
before we deployed our
detection system
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One year after the first leak detection:
58 installations
monitored
2800
tons CO2 equivalent
avoided in 2021
compared to 2020
2.5% of Colruyt Groups
total emissions
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Thank
you!

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Colruyt: Intelligent Leak Detection for HFC Cooling Installations