mightyTrini
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September 10, 2017, 03:34:19 AM |
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400amp 220 volts sounds better
5 amps a unit
derate 20%
320 amps divide by 5 = 64 max
so running 55 is possible
now 1100 watts = 4000 btu
55 x 4000 btu = 220,000 btu
you need lots of exhaust fans
as for network a 5 port lan router one from the modem then connect to 2 x 16 port switches
do 5 miners to a rasp pi3 put 6 rasp pi's on each switch if the gear dies you can move all the rasp pi's to one switch.
Thanks @philipma1957!!, thats the kind of info I was looking for. Cheers We have two 24" 24,000 CFM fans we were thinking of using somehow. I am seeing from your calculations, thats no where near enough to keep the pressure ratio correct. Any suggestions?? @bdog1234 "Hope you are to too old - you might not live long enough to see them. "  I hope you hear back from them also. We are exploring GPU mining, but the cards are over priced locally, so we need to find bulk suppliers. I just got an email from Canaan a few minutes ago as we requested their company registration info before wiring any money. Have you reached out to them? (sorry if a silly question), we have been very persistent with them, but always very pleasant. Thanks @goose1072! |
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philipma1957
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September 10, 2017, 01:25:10 PM |
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400amp 220 volts sounds better
5 amps a unit
derate 20%
320 amps divide by 5 = 64 max
so running 55 is possible
now 1100 watts = 4000 btu
55 x 4000 btu = 220,000 btu
you need lots of exhaust fans
as for network a 5 port lan router one from the modem then connect to 2 x 16 port switches
do 5 miners to a rasp pi3 put 6 rasp pi's on each switch if the gear dies you can move all the rasp pi's to one switch.
Thanks @philipma1957!!, thats the kind of info I was looking for. Cheers We have two 24" 24,000 CFM fans we were thinking of using somehow. I am seeing from your calculations, thats no where near enough to keep the pressure ratio correct. Any suggestions?? @bdog1234 "Hope you are to too old - you might not live long enough to see them. " I hope you hear back from them also. We are exploring GPU mining, but the cards are over priced locally, so we need to find bulk suppliers. I just got an email from Canaan a few minutes ago as we requested their company registration info before wiring any money. Have you reached out to them? (sorry if a silly question), we have been very persistent with them, but always very pleasant. Thanks @goose1072! okay my smaller solar array farm has 2x 1600 cfm and is doing 4 avalons and 5 s-9s about 10-11 kwatts no ac air to inject and with careful heat shielding it is okay. so 3200cfm can do 10kwatts you have 15x the cfm I have so I have 9 pieces you can cool the gear off but you need a tunnel effect give me a few minutes to link photos. https://bitcointalk.org/index.php?topic=2156421.msg21619449#msg21619449https://i.imgur.com/Tg2MDNt.jpghttps://i.imgur.com/Ob3GuCy.jpghttps://i.imgur.com/uVJ5986.jpg |
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TheYankeesWin!
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September 10, 2017, 01:35:11 PM |
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Phil your 2 racks are fully wrapped with the car insulation that is a heat and sound barrier.
Anyone can do that even with bigger racks. You have two three foot wide three foot high racks.
So you are six foot wide three feet high that is 6+6+3+3 = 18 ft of the car insulation.
The photos look like you are almost on top of the two exhaust fans.
So a bigger operation with 24,000 cfm fans would be hard to get the wind tunnel you get.
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philipma1957
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'The right to privacy matters'
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September 10, 2017, 01:43:24 PM |
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Phil your 2 racks are fully wrapped with the car insulation that is a heat and sound barrier.
Anyone can do that even with bigger racks. You have two three foot wide three foot high racks.
So you are six foot wide three feet high that is 6+6+3+3 = 18 ft of the car insulation.
The photos look like you are almost on top of the two exhaust fans.
So a bigger operation with 24,000 cfm fans would be hard to get the wind tunnel you get.
You have a point and the barn /loft gear is in is a big space. say 60 by 24 or 1400 sf ft. But we don't inject any ac . he can inject ac into the space. So it means his gear would get cooler air then my gear gets. We triple heat shielded the racks. The silver tarp reflected heat and shed water if the rook leaks The silver bubble warp reflected heat The car insulation directed hot air to the fans which are 18 inches from the racks This setup really reduces heat in the loft. If you sit by the gear you feel the suction of the two fans and the temps are 8 f cooler then if you move to the left of the gear. I was really proud that about 200 usd in material reduced the heat so much. and protected against a roof leak |
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gogostar
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September 10, 2017, 02:52:52 PM |
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Hello,
Is avalon 741 ok to run fan on high speed (5400-5600rpm) ?
i put ducting on mine to turn it into under-house heating about a week ago and so far no problems,but its running at 30C and fan 5400-5600rpm
thanks
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Didley1JT
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September 10, 2017, 06:11:14 PM |
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Phil your 2 racks are fully wrapped with the car insulation that is a heat and sound barrier.
Anyone can do that even with bigger racks. You have two three foot wide three foot high racks.
So you are six foot wide three feet high that is 6+6+3+3 = 18 ft of the car insulation.
The photos look like you are almost on top of the two exhaust fans.
So a bigger operation with 24,000 cfm fans would be hard to get the wind tunnel you get.
You have a point and the barn /loft gear is in is a big space. say 60 by 24 or 1400 sf ft. But we don't inject any ac . he can inject ac into the space. So it means his gear would get cooler air then my gear gets. We triple heat shielded the racks. The silver tarp reflected heat and shed water if the rook leaks The silver bubble warp reflected heat The car insulation directed hot air to the fans which are 18 inches from the racks This setup really reduces heat in the loft. If you sit by the gear you feel the suction of the two fans and the temps are 8 f cooler then if you move to the left of the gear. I was really proud that about 200 usd in material reduced the heat so much. and protected against a roof leak Is there a benefit to fully enclosing the miners? Speaking more to a very small operation like mine (< 5 miners). I'm kicking around ideas, but I am currently planning on building some type of enclosure that will funnel the hot air up from the miner enclosure in the garage into the attic. During the summer months, the heat in the attic greatly exceeds the heat in the garage, so even with the heat from the miners, the added circulation shouldn't increase the temp (and may even lower it due to the added circulation. And in the winter, it should represent a marginal reduction in the cost for heating the house. |
BTC: 1GaqNkHcstajEex6LQ6caMDLNJMLKwourJ
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philipma1957
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'The right to privacy matters'
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September 10, 2017, 06:25:08 PM |
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Phil your 2 racks are fully wrapped with the car insulation that is a heat and sound barrier.
Anyone can do that even with bigger racks. You have two three foot wide three foot high racks.
So you are six foot wide three feet high that is 6+6+3+3 = 18 ft of the car insulation.
The photos look like you are almost on top of the two exhaust fans.
So a bigger operation with 24,000 cfm fans would be hard to get the wind tunnel you get.
You have a point and the barn /loft gear is in is a big space. say 60 by 24 or 1400 sf ft. But we don't inject any ac . he can inject ac into the space. So it means his gear would get cooler air then my gear gets. We triple heat shielded the racks. The silver tarp reflected heat and shed water if the rook leaks The silver bubble warp reflected heat The car insulation directed hot air to the fans which are 18 inches from the racks This setup really reduces heat in the loft. If you sit by the gear you feel the suction of the two fans and the temps are 8 f cooler then if you move to the left of the gear. I was really proud that about 200 usd in material reduced the heat so much. and protected against a roof leak Is there a benefit to fully enclosing the miners? Speaking more to a very small operation like mine (< 5 miners). I'm kicking around ideas, but I am currently planning on building some type of enclosure that will funnel the hot air up from the miner enclosure in the garage into the attic. During the summer months, the heat in the attic greatly exceeds the heat in the garage, so even with the heat from the miners, the added circulation shouldn't increase the temp (and may even lower it due to the added circulation. And in the winter, it should represent a marginal reduction in the cost for heating the house. I run a garage setup I run the solar array which is a lot like an attic the solar array the exhaust fans are on top of the gear. so the wrapping of the two racks allows for the wind tunnel effect venting from your garage to your attic works if you are a ranch so the run would not be too long. you may need a ceiling exhaust in the garage and a gable fan in the attic l <<< fan l i i fan attic---------^----------------------------- ^ ^ miners garage |
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Didley1JT
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September 10, 2017, 06:38:33 PM |
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Phil your 2 racks are fully wrapped with the car insulation that is a heat and sound barrier.
Anyone can do that even with bigger racks. You have two three foot wide three foot high racks.
So you are six foot wide three feet high that is 6+6+3+3 = 18 ft of the car insulation.
The photos look like you are almost on top of the two exhaust fans.
So a bigger operation with 24,000 cfm fans would be hard to get the wind tunnel you get.
You have a point and the barn /loft gear is in is a big space. say 60 by 24 or 1400 sf ft. But we don't inject any ac . he can inject ac into the space. So it means his gear would get cooler air then my gear gets. We triple heat shielded the racks. The silver tarp reflected heat and shed water if the rook leaks The silver bubble warp reflected heat The car insulation directed hot air to the fans which are 18 inches from the racks This setup really reduces heat in the loft. If you sit by the gear you feel the suction of the two fans and the temps are 8 f cooler then if you move to the left of the gear. I was really proud that about 200 usd in material reduced the heat so much. and protected against a roof leak Is there a benefit to fully enclosing the miners? Speaking more to a very small operation like mine (< 5 miners). I'm kicking around ideas, but I am currently planning on building some type of enclosure that will funnel the hot air up from the miner enclosure in the garage into the attic. During the summer months, the heat in the attic greatly exceeds the heat in the garage, so even with the heat from the miners, the added circulation shouldn't increase the temp (and may even lower it due to the added circulation. And in the winter, it should represent a marginal reduction in the cost for heating the house. I run a garage setup I run the solar array which is a lot like an attic the solar array the exhaust fans are on top of the gear. so the wrapping of the two racks allows for the wind tunnel effect venting from your garage to your attic works if you are a ranch so the run would not be too long. you may need a ceiling exhaust in the garage and a gable fan in the attic l <<< fan l i i fan attic---------^----------------------------- ^ ^ miners garage If I minimized the volume of the enclosure, then I assume the miners themselves could move enough air to adequately vent into the attic (will probably be less than 10ft). I'd rather not have to add additional fans as each additional fan is just more kWh cutting into the profit. Will do whatever I need to, though. |
BTC: 1GaqNkHcstajEex6LQ6caMDLNJMLKwourJ
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gogostar
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September 10, 2017, 06:41:11 PM |
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gogostar
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September 10, 2017, 06:45:30 PM |
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sorry that quote button didnt work.
I used 5 inch ducting attached to fan (fan itself has 5inch diameter)
but i ordered 10 inch ducting to replace it asap.
what speed is yours fan running?
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philipma1957
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September 10, 2017, 07:09:48 PM |
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4260 in a 85 f room. also set the minimum fan to 25% not 10% the 10 inch flex duct will also reduce noise as you have found out even keep the opening the same size causes friction in the longer tunnel /duct and fan works harder. the longer the exit tunnel is it needs to be larger to allow air to leave . |
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gogostar
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September 10, 2017, 08:25:47 PM |
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Hello all, Im brand new to the forum and joined to ask for some opinions and feedback. We just placed an order for 60 Avalon 741's (if it's ever processed by Steve  ), and are planning to build a small farm with them. (we also ordered a couple L3+'s, four S9's and two D3's so far, but thats another story). We hope to run ~55 Avalon 741's at any given time with plans for another bulk order, hoping for about 40BTC/year for a couple years while we can (insert sarcastic 'HA' here) We have a steel prefab warehouse available, approx 750 sq-ft. We're installing a dry fire suppression system, 24hr security cams, there are guards on the compound, 30,000 btu HVAC with filters and exhaust fans. I was told the warehouse is connected to 300w 3 phase power and is wired for 220v (IIRC) Electricity is dirt cheap in my country (like 0.001 USD), and my business partner owns a fire/safety/electrical industrial (Oil/Gas) service company, so we have a certified electrician and network/IT admin assisting with the setup/networking. I wanted to get some feedback/pointers/tips on: Power Requirements Network Requirements Is there any special network hardware that may be needed to run 50+ miners? (or is it as simple as a simple LAN network, three 24 port switches and an internet connection??) help an old guy out  Much appreciated. Let us know if you'll get your order from cannan. Im courious if they process pallete order stright away or if its the same as rest of us. |
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NotFuzzyWarm
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September 10, 2017, 08:59:28 PM |
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<huge snip>
If I minimized the volume of the enclosure, then I assume the miners themselves could move enough air to adequately vent into the attic (will probably be less than 10ft).
I'd rather not have to add additional fans as each additional fan is just more kWh cutting into the profit. Will do whatever I need to, though.
As long as the air path is several sq ft wide and short might be ok but as a general rule (for compressors or chillers) when ducting hot exhaust all mfgrs require booster fans equal to the machines own fans. Though that is commonly several 10's of feet same probably applies here. |
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mightyTrini
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September 10, 2017, 10:27:09 PM |
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Can the power supply unit from Canaan be used in the US and similar regions? or is it for Asia and/or UK? Thanks |
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philipma1957
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September 10, 2017, 11:58:31 PM |
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Can the power supply unit from Canaan be used in the US and similar regions? or is it for Asia and/or UK? Thanks well you can buy a perfectly good one from sidehack far cheaper well under 100 dollars. https://bitcointalk.org/index.php?action=profile;u=130792no one has used one from them no one knows its quality it costs more it is expensive to ship it sidehacke is usa based in Missouri |
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Logan4el
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September 11, 2017, 11:35:15 AM |
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Simply out of stock. They had only 300 units in stock on 31th August.
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Didley1JT
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September 11, 2017, 11:45:43 AM |
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<huge snip>
If I minimized the volume of the enclosure, then I assume the miners themselves could move enough air to adequately vent into the attic (will probably be less than 10ft).
I'd rather not have to add additional fans as each additional fan is just more kWh cutting into the profit. Will do whatever I need to, though.
As long as the air path is several sq ft wide and short might be ok but as a general rule (for compressors or chillers) when ducting hot exhaust all mfgrs require booster fans equal to the machines own fans. Though that is commonly several 10's of feet same probably applies here. I'll make sure to limit the length of the duct and provide a large cross-sectional area. I'm thinking of using some type of circular tubing (placed vertical), with the miners mounted in-line. Simply out of stock. They had only 300 units in stock on 31th August.
Where did you get that number? |
BTC: 1GaqNkHcstajEex6LQ6caMDLNJMLKwourJ
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Logan4el
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September 11, 2017, 11:54:38 AM |
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Simply out of stock. They had only 300 units in stock on 31th August.
Where did you get that number? Comparing 3 facts: 1) Inventory available on 31th August was showing 300 units on Canaan website. 2) Canaan facebook "Only on 31st Sept we got hundreds of orders, more than our estimated inventory" That for sure means that inventory level was under 1000 units. 3) Nobody received any information regarding payment and all this tactics to waste customers time. |
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