Funder-Kristensen Torben, Danfoss

2. Safe use of NH3 in China’s Cold Chain Industry
Danfoss

3. Together with customers in the refrigeration
industry, Danfoss Cooling has started an industry
group called Global Food Cold Chain Council
(GFCCC) to promote cold chain expansion.
Cold Chain Development
Ammonia and de-frosting solutions - we firmly believe
in industrial refrigeration solutions based on low
charge ammonia and/or in combination with CO₂ .
Examples on system solutions are: Control Solutions
for ammonia systems based on the MCX platform,
defrost solutions and the upcoming new version of
Safety valves and Gas Detection systems.
Industrial Refrigeration
Together with customers in the refrigeration
industry, Danfoss Cooling has started an industry
group called Global Food Cold Chain Council
(GFCCC) to promote cold chain expansion.
Cold Chain Development
Ammonia and de-frosting solutions - we firmly believe
in industrial refrigeration solutions based on low
charge ammonia and/or in combination with CO₂ .
Examples on system solutions are: Control Solutions
for ammonia systems based on the MCX platform,
defrost solutions and the upcoming new version of
Safety valves and Gas Detection systems.
Industrial Refrigeration

4. Company’s view on the current state of ammonia use in
China
Old systems :
• Large amount of charge
• Manually operated
• No defrost optimisation
• Maintenance gaps less
visible in performance
New systems :
• Minimised amount of
charge
• Automatically operated
• Defrost optimisation
• Maintenance gaps very
visible on performance

5. Danfoss’s projects with Natural Refrigerants in China
• Convince stakeholders to use Ammonia instead of R22
• Minimising number of distributed components by integration into valve
stations
• Electronic controls for defrost and ensuring safe sequence of defrost
process
• Improving Energy Efficiency by automated control
• Roadshows to engage users to learn about ammonia

6. Traditional Air cooler build up
Hot gas defrost by pressure control
• Installation requires disassembly and
re-assembly prior to welding
• Increased risks for leakages due to
several weldings
• Complex insulation
• Occupies much space
• Need for regular maintenance on
individual products

7. Safety and efficiency
improvements
Hot gas defrost by liquid drain
• Safety can be ensured using electronic
valves and controls
• Efficiency will increase based on
operational optimization
• Innovation to ensure best defrost
capabiblities

8. The safe defrost cycle

9. Energy savings
Liquid drain versus pressure control
Up to
90%
reduction of
blow-by gas by using
the liquid drain
method