Boys, im doing something stupid again, building a blast freezer.

My last plate freezer build worked out great, i got it working to almost perfect once i fixed the head pressure, she needed to be over charged and a 0x small orifice, currently running at 300 to 30 on r404a. Which is a perfect 10 to 1, But it is over charged and the liquid line gets to ambient...

but we switched on how we use it, its only used to chill the food to 44f or less then its transfered to chest freezers for a 24 hour pull down to -0. Which apparently is how the ice cream industry has been doing it, forever.

my next project is to convert either my 22cu standing freezer or a 29cu chest freeezer into a blast freezer. Ive got an extra 2.8hp LBP condenser, so all i need is the evaporator, i already have the shell. i figure i can build it for maybe 2,000 bucks. for some reason, in my country there are a lot of companies who custom make evaporator for pretty cheap.

Any ideas or suggestions? I gotta map out all the parts so i can get them ordered, its gunna take maybe 1-2 months to get the parts, then another month to build (im busy now days)

I'm def gunna go with TXV's this time, the ablity to change out the orifices was a game changer on my last build.

I really want to get this build right on the first, and the mistakes i learned from my last one should be a lot of help.

for the 22cu standing freezer, i am thinking 2x pieces 20 inch by 20 inch evaps With some high quality slim radiator fans, I was looking at other blast freezers, and i swear there just using radiator fans haha.

So many options... should i shroud the evap in SS and cut holes for the fans, Should i leave them open.

How many distributors should i go with per evaporator, and per distributor, how many circuits.

any way, this is gunna be fun, so much stuff to figure out and calculate.

submitted by /u/jaybanin0351
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