Hello,
Is water defrosting for large low temperature coils really efficient...?
We have a tunnel freezer with almost 1500 liters of ammonia with a dedicated compressor (evaporating at -45°C). Defrost system is only water spray and it takes very long time to melt those ice and I guess the entire coil volume is slowly boiled off and back to the separator during the defrost cycle.
Compressor has to deal with all these gases this will be equivalent to roughly 100kw of refrigeration capacity.
Since the compressor is dedicated to this machine, it wont work during defrost cycle and therefore no availability of hot gas to defrost or to drain the coil. Is there a more efficient way to defrost these kinds of systems.?