|
Title: PSU efficiency calculation Post by: Ruso21 on November 27, 2019, 02:28:33 PM my questions is, how to calculate the final watt consumption???
many people use the APW7 which has... 220V Output: 150A / 1800w 120V Output: 67A / 800w PF 0.99 (almost perfect) https://shop.bitmain.com/product/detail?pid=000201809111802447941Bf38AO30604 below the specs on that page there are 2 charts, 1 it says the efficiency which shows 93% at 150A; this means full load on 220v with 7% loss. now the Zig Z1 Pro consumes 1500w, so... how to calculate this part? which one is correct??? 1800w -7% = 1674 watts or 1500w / 0.93% = 1612 watts from the other hand, this is something similar with the PC PSU https://www.velocitymicro.com/blog/what-is-psu-efficiency-and-why-is-it-important/ Title: Re: PSU efficiency calculation Post by: HeRetiK on November 27, 2019, 04:38:23 PM With a consumption of 1500W you're looking at I = 1500W / 12V = 125A which according to the table is at an efficiency of ~94%
This means that with the miner you mentioned you'll look at a power draw of roughly 1500W / 0.94 = 1595.74W Looking at the chart the PSU's peak efficiency is 95% at 60A * 12V = 720W This is assuming an input voltage of 200-240V as per the Bitmain chart. For reference: https://www.rapidtables.com/convert/electric/Watt_to_Amp.html Title: Re: PSU efficiency calculation Post by: Ruso21 on November 29, 2019, 01:09:54 AM With a consumption of 1500W you're looking at I = 1500W / 12V = 125A which according to the table is at an efficiency of ~94% This means that with the miner you mentioned you'll look at a power draw of roughly 1500W / 0.94 = 1595.74W Looking at the chart the PSU's peak efficiency is 95% at 60A * 12V = 720W This is assuming an input voltage of 200-240V as per the Bitmain chart. For reference: https://www.rapidtables.com/convert/electric/Watt_to_Amp.html Thanks HeRetiK... Title: Re: PSU efficiency calculation Post by: Grim on November 29, 2019, 01:19:53 PM Is this PSU really that efficient?
95% at 50% load is titanium+ category. Has anyone meassured it themself? Seems like a really good deal. Title: Re: PSU efficiency calculation Post by: Ruso21 on November 30, 2019, 04:28:37 PM Is this PSU really that efficient? 95% at 50% load is titanium+ category. Has anyone meassured it themself? Seems like a really good deal. the efficiency in that specs is not real, i asked bitmain about an APW7 with a B7, they told me that i can consider 80% at 100% so on 220Vac at 100% the efficiency might be 85% |