<a target="_blank" href="I'm an electrical engineer, and I got curious about what happens electrically once you scale X9s past "a few units on house circuits." So I worked through a complete design for a 25-unit farm, from the supply down to the generator.Some of the results surprised me:The room is the real risk, 25 units put 61.8 kW of heat into the room around the clock. If the cooling stops, an enclosed room goes from 25 °C to the X9's 45 °C inlet limit in under 3 minutes.Buying more tons of cooling won't fix it. You need more airflow. The fleet moves 12,000 CFM. A normal 20-ton comfort AC unit only supplies about 8,000, so the miners end up breathing their own exhaust even though the tonnage is right.Your UPS can make things worse. If the generator fails to start, a 10-minute battery keeps 62 kW of miners running in a room that cooked itself 7 minutes earlier. The miners have to shut down automatically when the cooling is lost.The controls size the generator, not the load. For the same 83.6 kW farm, the required generator comes out anywhere from 125 kW to 400 kW, depending on whether the load is brought back on in stages after an outage.Check the voltage rating on everything. 25 units push you onto 480Y/277 V three-phase. The X9's P14 inlet, cords and breakers all need to be rated for 277 V, and a lot of common gear is only rated 250 V.It also covers phase balancing (9/8/8), harmonics and why the neutral stays full-size, breaker coordination, cable sizing at a 40 °C room temperature, and running costs.Paper: https://www.kvatools.io/papers/monero_farm_25_unit_designIt's free, with no signup and no ads. It's the first in a series of worked design papers I'm publishing on kVATools.io, my free browser-based electrical calculator site, and more are coming.Two asks:Electricians and EEs: please tear it apart. Every assumption is listed in §3 so you can check my work. If I've got something wrong, I'd rather hear it here.Miners: what should I cover next? " title="I did the full electrical design for a 25 × Antminer X9 Monero farm. Here's what 62 kW of RandomX actually takes (free paper, looking for review)">full image</a>
<strong> - Repost: I did the full electrical design for a 25 × Antminer X9 Monero farm. Here's what 62 kW of RandomX actually takes (free paper, looking for review)</strong> (<i>from Reddit.com, I did the full electrical design for a 25 × Antminer X9 Monero farm. Here's what 62 kW of RandomX actually takes (free paper, looking for review)</i>)
<br><blockquote> I'm an electrical engineer, and I got curious about what happens electrically once you scale X9s past "a few units on house circuits." So I worked through a complete design for a 25-unit farm, from the supply down to the generator.Some of the results surprised me:The room is the real risk, 25 units put 61.8 kW of heat into the room around the clock. If the cooling stops, an enclosed room goes from 25 °C to the X9's 45 °C inlet limit in under 3 minutes.Buying more tons of cooling won't fix it. You need more airflow. The fleet moves 12,000 CFM. A normal 20-ton comfort AC unit only supplies about 8,000, so the miners end up breathing their own exhaust even though the tonnage is right.Your UPS can make things worse. If the generator fails to start, a 10-minute battery keeps 62 kW of miners running in a room that cooked itself 7 minutes earlier. The miners have to shut down automatically when the cooling is lost.The controls size the generator, not the load. For the same 83.6 kW farm, the required generator comes out anywhere from 125 kW to 400 kW, depending on whether the load is brought back on in stages after an outage.Check the voltage rating on everything. 25 units push you onto 480Y/277 V three-phase. The X9's P14 inlet, cords and breakers all need to be rated for 277 V, and a lot of common gear is only rated 250 V.It also covers phase balancing (9/8/8), harmonics and why the neutral stays full-size, breaker coordination, cable sizing at a 40 °C room temperature, and running costs.Paper: https://ift.tt/0SU7cWn free, with no signup and no ads. It's the first in a series of worked design papers I'm publishing on kVATools.io, my free browser-based electrical calculator site, and more are coming.Two asks:Electricians and EEs: please tear it apart. Every assumption is listed in §3 so you can check my work. If I've got something wrong, I'd rather hear it here.Miners: what should I cover next? </blockquote>
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<hr><strong>Mining:</strong> <br>
<a title="Cryptotab browser" target="_blank" href="https://cryptotabbrowser.com/12/4000343"><u>Bitcoin</u>, Cryptotab browser</a>
- <a title="Pi Network, CLOUD PHONEMINING" target="_blank" href="https://minepi.com/cusidore"><u>Pi Network</u> cloud PHONE MINING</a>
<br><a title="Fone, CLOUD PHONE MINING" target="_blank" href="https://play.google.com/store/apps/details?id=com.cloud.earning"><u>Fone</u>, cloud PHONE MINING</a> cod. dhvd1dkx
- <a title="Mintme, PC PHONE MINING" target="_blank" href="https://www.coinimp.com/invite/86d61388-18f9-4f8b-8561-8962c67e7166">Mintme, PC PHONE MINING</a>
<hr><strong>Exchanges:</strong> <br>
<a title="Coinbase.com" target="_blank" href="http://coinbase.com/join/occhip_8?src=android-link">Coinbase.com</a>
- <a title="Stex.com" target="_blank" href="https://stex.com/?ref=27877494">Stex.com</a>
- <a title="Probit.com" target="_blank" href="https://www.probit.com/r/46858290">Probit.com</a>
<hr><strong>Donations:</strong> <br>
<a title="Done crypto" target="_blank" href="https://commerce.coinbase.com/checkout/140e9bb6-c4ef-4156-92cf-9c87a88fd259">Done crypto</a>
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