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Thread: Cold Storage Design
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01-09-2012, 11:30 AM #11
Re: Cold Storage Design
Its my opinion & in Australia I believe its mainly used in supermarkets.
Nestle still use ammonia, but it can depend how big plant is.
CO2 has higher pressures than normal fridge plants.
If system is stopped for a period relief valves will vent most of it.
Specialized equipment required, as well not a lot of general refrigeration companies work with it.
You need detectors for CO2 in rooms & areas of poor ventilation for personell protection.
You still need an ammonia or other refrigerant to run chillers & to condense CO2
Glycol is good as well for secondary refrigerant in air conditioned rooms or process areas.