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Author Topic: Static Pressure and Antminers...?  (Read 373 times)
BTCTheGreat
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November 07, 2017, 05:56:02 PM
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Everyone keeps talking about static pressure in their videos. Can someone explain me how that works when it comes to mining? I searched about it on the web but I am getting confused about what it should be for exhaust and intake and other scientific reasons.
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VRobb
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November 07, 2017, 10:44:36 PM
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High, that's all you need to know re static pressure and antminers.  It needs to be high compared to most common computer case type fans.

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NotFuzzyWarm
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November 08, 2017, 03:52:01 AM
 #3

'Static pressure' refers to the force (pressure) needed to push air through resistance. Think blowing out air with an open mouth vs blowing the same amount of air through a straw. Takes a lot more effort.

Normal case fans move air through a mostly wide open computer case - easy peasy so can use nice quiet low pressure fans to move a lot of air. Miners are very densely packed with heat sinks and it take a much more powerful fan capable of producing real pressure to move the air and by their nature that means higher speed and LOUD.

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philipma1957
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November 08, 2017, 05:30:46 AM
 #4

here is a very clear example

dense radiator for cooling gpus

red fan  is not high static  but moves 100cfm
white fans are high static but moves 70cfm

so red should be best  since  cfm is higher



but it is the worst 58c

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BTCTheGreat
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November 08, 2017, 02:59:38 PM
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'Static pressure' refers to the force (pressure) needed to push air through resistance. Think blowing out air with an open mouth vs blowing the same amount of air through a straw. Takes a lot more effort.

Normal case fans move air through a mostly wide open computer case - easy peasy so can use nice quiet low pressure fans to move a lot of air. Miners are very densely packed with heat sinks and it take a much more powerful fan capable of producing real pressure to move the air and by their nature that means higher speed and LOUD.

Very good analogy...But I still didn't quite get it Embarrassed . Does this mean that the supply side i.e. the cold aisle side should have more air blowing and the exhaust should be less powerful than the supply side?
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November 08, 2017, 03:48:47 PM
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'Static pressure' refers to the force (pressure) needed to push air through resistance. Think blowing out air with an open mouth vs blowing the same amount of air through a straw. Takes a lot more effort.

Normal case fans move air through a mostly wide open computer case - easy peasy so can use nice quiet low pressure fans to move a lot of air. Miners are very densely packed with heat sinks and it take a much more powerful fan capable of producing real pressure to move the air and by their nature that means higher speed and LOUD.

Very good analogy...But I still didn't quite get it Embarrassed . Does this mean that the supply side i.e. the cold aisle side should have more air blowing and the exhaust should be less powerful than the supply side?

no  that has zero  to do with it.

the fans need to blow the air force fully 


think  of a hose  with water  and no nozzle it may let 100 gallons of water  a minute  but not  forceful like   a pressure washing  cleaning concrete.

in the case of the ant miner  s-7 or s-9  as long as the push is close to the pull there really is not an issue.

even if the push  it say  110% of the pull  by the time the push reaches  the pull  the tight heatsink fins have slowed it so that the push  will not overwhelm the pull.

think  like this   push>>>>110 >>>>>>>tight fins >>>>>>100>>> pull

the tight fins would make it equal 


or

push >>>>>>110 >>>>>>>>>no fins>>>>>100>>>>> pull

this would allow the stronger fan  to hurt the weaker fan.


but this simple is not an issue with the s-9

unless

push>>>>>>>250>>>>>>>tight fins>>>>>>100>>>>>pull

this could allow the push to hurt the pull  if you could find a fan that would push that hard.


basically  for  the s-7 or s-9  use the stock fans

if sound is an issue try this series of sound proofing

https://www.youtube.com/channel/UC-K1Sokgy3-4CdV_uZF8ubw?view_as=subscriber

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Steamtyme
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November 09, 2017, 08:26:08 AM
 #7

I remember my texts referring to it as the force needed to move the fluid through the system.

As a miner, especially beginning you don't have to worry about it or think about it. Unless you begin to manufacture your own Asics... not going to happen.

Or like Phil is showing you your own GPU rigs for Alt's.

If you have units that have a high static pressure you will just find yourself needing to keep the cooling surfaces clean and obstruction free( should be doing this anyway). This includes maintaining a dust free environment, and probably opening them up to clean them more often.

Overall it's just a design issue, that affects cooling.

mxyzptlkof6th
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November 09, 2017, 11:39:44 AM
 #8

The lower the static pressure the better the ventilation. Better ventilation leads to efficient mining. Efficient mining is necessary to make profit that can return what you had invested.
sivagananathan
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November 09, 2017, 01:23:16 PM
 #9

The lower the static pressure the better the ventilation. Better ventilation leads to efficient mining. Efficient mining is necessary to make profit that can return what you had invested.

I just got my first antminer s5, and I can hear it throughout my entire house ... have very high static pressure,

which is ideal for that side of things.
NotFuzzyWarm
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November 09, 2017, 01:36:49 PM
 #10

The lower the static pressure the better the ventilation. Better ventilation leads to efficient mining. Efficient mining is necessary to make profit that can return what you had invested.
Methinks folks are talking about 2 very different matters namely, pressure through a miner OR room/building ventilation.

A miner needs high static pressure fans to move the air through them.
Ventilation through a room is entirely different.
OP - which are you confused about?

-Joshua Zipkin aka Joshua Alexander leaked AMT A1 miner skype chats http://bit.ly/1Qjt6lj
-For bitcoin to succeed the community must police itself.
-Support Sidehacks miner development. Donations to:   1BURGERAXHH6Yi6LRybRJK7ybEm5m5HwTr
BTCTheGreat
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November 09, 2017, 01:52:16 PM
 #11

The lower the static pressure the better the ventilation. Better ventilation leads to efficient mining. Efficient mining is necessary to make profit that can return what you had invested.
Methinks folks are talking about 2 very different matters namely, pressure through a miner OR room/building ventilation.

A miner needs high static pressure fans to move the air through them.
Ventilation through a room is entirely different.
OP - which are you confused about?

The thing I am worried about is burning the miners due to overheating and all those issues. There are some videos on the web from some miners saying it doesn't matter how much air you are mining through the room but what matters is the static pressure. So that is why I am just trying to understand what it is, the concept from the miners point of view and how to accurately do it and take care of it so the miner life increases.
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