gwapa
19-01-2009, 02:54 AM
I am working in a Blast Tunnel to freeze shrimps.
The Shrimps are received at +5ºC and should frozen and cold down to -12ºC
The total capacity will be 40 metric tons which correspond to 50 pallets of product
The tunnel will operate 16 h per day .The rest of the time will be used to load it cleaning and unload.
The evaporation will be at -35ºC and the Tunnel temperature will be at -27ºC (ammonia)
Questions:
What should be the fins separation in the evaporator in order to have just one defrost?
There will be 8 hour after the freezing period, How could be the defrost design? Only air, Electrical or hot gas .Could it be manual or automatic?
How many pallets should be located in series to guarantee good air circulation and cooling?
What will be the air velocity around the pallets?
What should be the separation between pallets and pallets with walls
I appreciate your tips
GWAPA
The Shrimps are received at +5ºC and should frozen and cold down to -12ºC
The total capacity will be 40 metric tons which correspond to 50 pallets of product
The tunnel will operate 16 h per day .The rest of the time will be used to load it cleaning and unload.
The evaporation will be at -35ºC and the Tunnel temperature will be at -27ºC (ammonia)
Questions:
What should be the fins separation in the evaporator in order to have just one defrost?
There will be 8 hour after the freezing period, How could be the defrost design? Only air, Electrical or hot gas .Could it be manual or automatic?
How many pallets should be located in series to guarantee good air circulation and cooling?
What will be the air velocity around the pallets?
What should be the separation between pallets and pallets with walls
I appreciate your tips
GWAPA