knighty
15-03-2021, 04:29 PM
I'm using freezer truck containers with added refrigeration as blast freezers... space/availability/price makes them great for the job. (not using the truck systems)
frozen dog food, in at ambient temp, needs to be frozen to -18'C - current systems are set to -35'C to try and make sure meat is frozen through - only make it to -35'C after the weekend when no product added
I'm moving things around and getting 8 more containers, with a new way to fill them, so I can stack the evaporators ontop of each other at the far end (away from the doors) and add a false wall down each side for return airflow (evaps blowing through product on racks).
I'm a little worried I'll restrict airflow too much for the evap fans
I'd like maximum airflow through the product
I'm think I should add extra fans for airflow sucking from one end of the container to the other
extra heat from fan motors means it would be best to add the motors externally and extend the shaft into the container for the fans
but... by the time I'm doing that... maybe I should remove all the evap fans and just use external powered fans?
3 evaps, 2 fans each, 600watts/fan is 3600watts of heat I'd remove from the containers?
all sounds good, add false walls, remove evap fans, add external powered fans, box in around evaps to direct airflow....
but what if I have too much air flow? how badly will it mess with system performance? - I thought to add motorised TXVs to help with the initial high (ambient) temps and help pull temps down as low as possible?
quick and dirty diagram (only added 1 fan to pic for simplicity)
15786
so...
is it worth moving fan motor heat out of the container?
will I mess with the evap airflow too much and ruin everything?
frozen dog food, in at ambient temp, needs to be frozen to -18'C - current systems are set to -35'C to try and make sure meat is frozen through - only make it to -35'C after the weekend when no product added
I'm moving things around and getting 8 more containers, with a new way to fill them, so I can stack the evaporators ontop of each other at the far end (away from the doors) and add a false wall down each side for return airflow (evaps blowing through product on racks).
I'm a little worried I'll restrict airflow too much for the evap fans
I'd like maximum airflow through the product
I'm think I should add extra fans for airflow sucking from one end of the container to the other
extra heat from fan motors means it would be best to add the motors externally and extend the shaft into the container for the fans
but... by the time I'm doing that... maybe I should remove all the evap fans and just use external powered fans?
3 evaps, 2 fans each, 600watts/fan is 3600watts of heat I'd remove from the containers?
all sounds good, add false walls, remove evap fans, add external powered fans, box in around evaps to direct airflow....
but what if I have too much air flow? how badly will it mess with system performance? - I thought to add motorised TXVs to help with the initial high (ambient) temps and help pull temps down as low as possible?
quick and dirty diagram (only added 1 fan to pic for simplicity)
15786
so...
is it worth moving fan motor heat out of the container?
will I mess with the evap airflow too much and ruin everything?