(Review/Guide) Antminer S15 27.0 Th/s, 1600 W Bitcoin (SHA-256) ASIC miner

[MoparMiningLLC]

Yes, PLEASE!  

I hope to get to it this weekend - if time allows - really just need to take measurements - looks like it will just be double length - if so, can widen one end and still leave it as 4" or even as 6" exit.

[euhctcyn]

I hope to get to it this weekend - if time allows - really just need to take measurements - looks like it will just be double length - if so, can widen one end and still leave it as 4" or even as 6" exit

I placed the regular ones from the S9s that have a 5" exhaust (120cm wide I think) to check, and they don't fit properly, so maybe you will have to play a little bit more... Double length adjustment will not be enough, since the screws in the corners are like 1cm away from the S9s ones.

If you could to 4", 5" and 6" versions that would be awesome^awesome really 

[ZimbaCardi]

I wonder if they move double the air, does the S9 move 250 FPM, S15 500?

[philipma1957]

I wonder if they move double the air, does the S9 move 250 FPM, S15 500?

yes  maybe not 2x but yes more.

it is more like 2 short tubes

vs 1 long tube.

for cooling it is a better design  as the air only travels say 9 inches in this design

vs 16 inches in old design

so a    250 fan >>>say 16 inches>>>> 250 fan      in 1 tube does at best 275

vs a  >>>9">>>250 fan
        >>>9">>>250 fan  much closer to   say 400

so the exit ducts  need to be 2x the size.

[MoparMiningLLC]

exactly - so i am thinking of doing double tall same width and exit to 4" for mine only because I already have 4" to 6" adapters on the 6" ducts already but I still have some on 4" ducts as I upgrade those to 6" i will forego the 4" to 6" adapters and just use a 6" right off the miner. eventually will swap them all out as the ocd aspect will bug me lol.

[philipma1957]

exactly - so i am thinking of doing double tall same width and exit to 4" for mine only because I already have 4" to 6" adapters on the 6" ducts already but I still have some on 4" ducts as I upgrade those to 6" i will forego the 4" to 6" adapters and just use a 6" right off the miner. eventually will swap them all out as the ocd aspect will bug me lol.

you want to shrink from say  a 6 by 12 opening (the 2 fans) to 1 four inch duct hole?

or from say the 6 by 12  fans to 2 4 inch duct holes?

I would be pretty certain you will need 2x  4 inch ducts minimum

[MoparMiningLLC]

right now I have 4" 3d printed piece on the back of the current S9's like this



which directly connects to one of these - immediately opening it from 4" to 6" --- originally I ran them as 4" directly outside but decided 6" would be better, rather then make all new pieces to hook to the miner, I used a 4" to 6" and just ran the ducting from the adapter to outside (distance to outside is less than 1 foot. The air does not have far to go before being vented.



so my idea is to use the 3d printer to make something similar to this shape that will mount to back of miner and hook to my 4" to 6" adapter - thus the only thing I am replacing is the piece on the back of the miner.

the other idea is to just make it 6" remove the 4" to 6" adapter completely.

[philipma1957]

The reduction in size from the rectangle to the tube may be too much and cause overheating.

The tube being short under three feet helps.

[ZimbaCardi]

Yeah, don't go to 4" then to 6" it will restrict your flow, go straight to 6".

[MoparMiningLLC]

The reduction in size from the rectangle to the tube may be too much and cause overheating.

The tube being short under three feet helps.

The tube length is 12" exactly from the 6" opening to outside. I just need to go from the back of the miner to the 6" opening on the duct. And with what you have said and my own thinking I will remove the 4" to the 6" adapter and go from the square directly to the 6" duct opening with a 12" tube to outside.  or do you think that would be too restrictive still?

Yeah, don't go to 4" then to 6" it will restrict your flow, go straight to 6".

agreed - based on what everyone is saying. will work on a design this weekend and during next week around my regular work schedule.

[philipma1957]

it is a friction issue due to smaller duct.

lets say the rectangle is 6 x 12 = 72 sq inches

a 4 inch duct is  only  4 x 3.14 = 12.56 sq inches  not likely to work  as a guess 95% no way

and a 6 inch duct is 9 x 3.14 =  28.36 sq inches  may work  maybe I would try it out

also the length of ducts cause friction  so shorter the better.

I don't remember the formulas for figuring it out.

you may find  the 6 by 12 rectangle  ends up morphing into a 7 inch duct  they do exist

that would be 6 x 12 = 72 rectangle

and 12.25 x 3.14 = 38.465 7 inch duct  

round duct I use pi x r x r   or 3.14 x 3.5 x 3.5 = 38.465

[MoparMiningLLC]

If I had room to expand the holes to 8" i would but they would then overlap and I cant have that.

[philipma1957]

maybe 7 inch they do exist.

also both the s15 and the t15 have low power settings  which could help if the six inch duct is too small.

[MoparMiningLLC]

I will go with the square off the back of the miner to 6" and see how that works.

[philipma1957]

I will go with the square off the back of the miner to 6" and see how that works.

let us know once it sets up.

[MoparMiningLLC]

let us know once it sets up.

will do - I will take the measurements this weekend - should be pretty straight forward.

currently this is how they are - you can see the 4" goes from back of miner to the 6" and then with a 12" tube to outside. Once done I will be insulating the walls as well to reduce heat coming in from outside.

[Artemis3]

i also notice no exhaust fans - I will have to come up with something on the 3d printer so I can hook these to my exhaust ducts

Just don't neglect the airflow around the miner, it is important. Ducts should not be directly attached to the miner in my opinion, but to a box where the miner resides inside instead.

[MoparMiningLLC]

Just don't neglect the airflow around the miner, it is important. Ducts should not be directly attached to the miner in my opinion, but to a box where the miner resides inside instead.

my miners have considerable airflow around them, they are not in a box per se unless you count the entire building as a box - they are spaced about 18 inches apart from one another and there are 20 miners in an 8' by 8' room that has two 23" intake fans blowing into the room there is also a 5k btu AC unit and a dehumidification system. Miners stay around 60 C to mid 80 C.

[msdjaw]

Is it true that Antminer S15 has serious issues with its PSU?

[philipma1957]

Is it true that Antminer S15 has serious issues with its PSU?

No what is true is one guy blew 2 of them up feeding 245 volts to them.

No one has had any other issues and reported them here