Fundamentals of Data Center Power: Power Calculations

[@BrianJDumas]

Thanks for putting this out. Nice to get a perspective as to where all the power goes and adjustment factors to give you a reasonable number for power usage giving you the total picture.

[@gogotraining3604]

Thank you for the great input Brian.

[@mohammedamineamlila4726]

Very instructive

[@gogotraining3604]

Thanks so much for letting us know.

[@ravikumarkalamraju5044]

excellent,,thank you for the details. very useful to me..Simple and effective.

[@Robert_Kawalec]

Simple and informative!

[@kavindudharmasiri236]

A really informative video. Keep it up

[@abdeslammerazka3003]

Thank you for the video, I have a question about the power rating of UPS, for example when we say a UPS of 250kVA is it the power that will be delivered at the output of the UPS or it is the input power that will be consumed at the input of that UPS?

[@gogotraining3604]

Thanks for the great question Abdeslam. 250 kVA is the input power consumed at the input to the UPS. What is delivered to the output of the UPS depends on the power factor of the UPS. A 250 kVA UPS with a power factor of .8 will deliver 200 kW of output. There are other factors, of course. The UPS can consume as much as 20% of its input power to recharge the batteries.

[@abdeslammerazka3003]

​@@gogotraining3604 Thanks for replying to my question, As you know most UPSs nowadays have a unity power factor at the output so I think we should consider only the effeciency of the UPS plus the percentage (20%) reserved for recharging the batteries to get the power delivered at the output of the UPS, am I right?

[@gogotraining3604]

@@abdeslammerazka3003 It depends on the type of UPS. In a double-conversion UPS (most common), the AC power is converted to DC and then back to AC. There is a loss whenever you convert the power, so the power in will be greater than the power delivered to the output.

[@abdeslammerazka3003]

@@gogotraining3604 Thanks for your reply, I have an other question, since most UPS nowadays have unity Power Factor at the output, should we consider PF=1 while sizing equipment and electrical boards that are fed from that UPS ?

[@gogotraining3604]

@@abdeslammerazka3003 Hello. We recommend you sign up and take the full course. When you take the course you have direct access to the instructor to ask all your questions. Check out the full offering at this link: gogotraining.com/training/libraries/9/data-center/

[@RomeoAlpha-d1k]

Thanks for the efforts to prepare this video, it was informative

[@gogotraining3604]

Thanks for your feedback Raef. Appreciate your support!

[@getabegaz]

This is a great material

[@محمدابراهيم-ح5ج4ه]

Thanks for sharing your knowledge. could you please guide me about which organization certification would be better in data center Operation & maintenance.

[@TheJoypool]

Thanks a lot for doing a prctixal example. My question is Where did the 1.55 come from? Is the NEC and if it is which article?

[@mazinelgasim8952]

Plus 1.3 also what do you mean?

[@Goonzilla1102]

Respect, that was a very informative video

[@gogotraining3604]

Thank you for your kind words Alan.

[@cliftonling5007]

Thx, i learnt the ratio already. But i wonder the consumption will it be different for tier3 or 4DC,

[@christianmarcu6021]

Hi! very interesting topic for which I have a few questions: in a typical DC, in each rack are 2 PDUs for redundancy purposes. My question is: when both PDUs are connected but only one is active (in the sense that it provides active power) how the power consumption is calculated for that rack? Is it that one PDU is supplying max power capacity and the other is idle? If idle, will still consume some power; how much that would be?

[@ig2538]

Perfect explanation thank you👍🏼🌹

[@gogotraining3604]

Thank you!

[@chirpingbluebird]

great video. is there a video on calculatiing cooling as well? thanks

[@tedlahm5740]

Wonderful presentation

[@gogotraining3604]

Thanks so much Ted.

[@gogotraining3604]

Hi Ted, thans so much. If you are interested in the full series please visit our site at gogotraining.com

[@VamsiKrishna-ls5fk]

Thank you for the Video. Appreciate your work !

[@gogotraining3604]

You are very welcome. You an view additional videos on our site, gogotraining.com

[@rashidhafeez4530]

thanks Sir very valuable information

[@maximilian19931]

normal Colocation run at about 10kW so 1.5 is a bit low. 150 Racks is a lot of space, which could be down sized to 23 racks and 27 racks if all server and storage gets packed together. most of this load can even be run in the cloud where somebody else hosts the server and we just need to worry about rightsizing our Instances to handle the load. No more datacenter building needed on our site.

[@kasimshaikh3750]

Simple and on point. Thanks

[@gogotraining3604]

Thank you Kasim. Appreciate the positive input!

[@sudalaiyandiessakiappan5747]

Excellent sir very useful to me

[@gogotraining3604]

Thank you so much Sudalaiyandi. You can view the full course on GogoTraining website if you need more information.

[@chandrahasreddy4463]

4:46 Rack total is 1.5 kW. Is it per day or per month..?

[@20rakee]

why UPS is some x percentage of Critical load?

[@brhanuketema8295]

thanks for excellent presentation.how can u calculate the hard disk size of data center. thanks in advance

[@mousben6427]

First, thank you. I have a question about cooling. Does 1 kw of heat equal to 1 kw of electrical power?

[@pavankumar-tw9mu]

Where did got the 1.01and others multiple factor please explain

[@vishnuprakash3187]

Could you explain the capacity of substation, power transformers needed to meet the design load of the data centre? I know its a lot to ask, it would be very helpful, though.

[@MohandBELGACEM]

Fantastic explanations Dave. thank you. (a simple one for you). Any main transformer to be added at the primary of Data Center incomer ? any power lost?

[@nursyuhada3601]

Why did when we want to calculate for PUE, the value for IT load will be taken from UPS load? why dont from the PDU? can you explain?

[@fa.android]

Thank you

[@aizenandaldensuperheroes]

Very good video. Can you please share the reference used for inefficiency factor of UPS & Battery? Are the numbers standard or depend on manufacturers data? Thanks in advance.

[@gogotraining3604]

Thank you for getting in touch with us. This is just one module from a complete course. If you are interested in learning more, here is the link to the course: gogotraining.com/training/courses/279/fundamentals-of-data-center-power/

[@mitulkulshrestha8067]

Brilliant

[@gogotraining3604]

Thanks so much Mitul. If you are interested you can check out the full course at www.gogotraining.com. Courses come with access to the instructor to ask questions.

[@ElectricalCustomize]

Explain. Sizing of transformer for this example.... Because IT load is single phases and other are three phases... If you explain also this then it would be very useful

[@sanjedgaming8124]

Hey, Cooling Efficiency is most of the time 2-3X (EER) so why need that much power for Chiller or Precision AC ? if server racks power is 255KW heat load would be also around 255KW so need an air cons that will support 255KW+ cooling capacity and power consumption will be almost 1/3.

[@qasimnaseer1]

excellent video. In same example can you please share calculation for PUE? like total power going in would be 879 and it will be divided by ?

[@gogotraining3604]

Thank you Qasim. PUE (Power Usage Effectiveness) is calculated by : Total Power In / Total Power used for IT equipment (servers, network) PUE is used to see how efficiently your infrastructure is running (power, but cooling primarily). The best PUE would be 1.0, meaning all the power coming into the data center is being used to power the IT equipment. A value of 2.0 would mean of all the power coming into the data center, only half of it is powering IT equipment. The other half is overhead (losses due to power or cooling infrastructure).

[@qasimnaseer1]

@@gogotraining3604 yes thank you. I was actually asking for the figures in denominator and nominator from the example you shared in video. If you can plz share.

[@qasimnaseer1]

@GogoTraining I have another question please. How to improve PUE value, best option is to reduce power consumed by cooling. Another factor is to move to virtualization from use of physical server. But P2V will reduce the power consumption of data center but it will worse the PUE as critical load denominator will be less so value will be high

[@gogotraining3604]

@@qasimnaseer1 In the example Dave shared, he showed a critical load of 225 kW. This is the IT load in the PUE calculation. So to calculate PUE in this example, divide total load (703 kW) by IT load (225 kW) to get a PUE of 3.12. The numbers Dave used were very conservative to show how we would go through the process of sizing equipment and calculating overhead. Ideally, we would want to see our PUE as close to 1.0 as possible.

[@pedrobarrantes1177]

Great presentation! Thank you!

[@gogotraining3604]

Thanks so much Pedro! If you would like to see more, please visit our site at GogoTraining.com

[@wjgoh7573]

Thanks for the video - that's very clear. Based on your example, would this mean that the hypothetical data centre you've described had a PUE of ~3 (i.e. 703kw divided by 225kw)?

[@benedictali6110]

Sorry to be off topic but does someone know a tool to get back into an Instagram account..? I somehow lost the password. I would appreciate any tricks you can offer me

[@augustryker6822]

@Benedict Ali instablaster ;)

[@benedictali6110]

@August Ryker i really appreciate your reply. I found the site thru google and I'm trying it out atm. Looks like it's gonna take quite some time so I will get back to you later with my results.

[@benedictali6110]

@August Ryker It did the trick and I finally got access to my account again. I'm so happy:D Thank you so much, you really help me out :D

[@augustryker6822]

@Benedict Ali You are welcome :)

[@arsilarsil5256]

You are not share about vesda and fm200 in video?

[@lyaeusv3828]

excellent video

[@gogotraining3604]

Thank you very much!

[@byabagambivincent9568]

How do you solve an issue of power and generator failure in DC cause all ACs will go off?

[@egintaappriyantibrpelawi7871]

For the Value of 20% whrre does that Assumption come from, sir ?

[@oleg1981]

How do you think. What will be a power consumption on 7000 racks an 100000sqf?

[@gogotraining3604]

Hi Oleg. The size of the data center does not impact the power consumption (except for the amount of cooling needed). The number of racks is part of the equation, but the power consumption of each rack is also needed for the calculation. If each rack consumes 10 kW, you will start with 70,000 kW if required power. You then have to calculate cooling cost, losses in the UPS, and lighting, as well as calculating for peak power draw. You can use the sample calculations in the module but start with 70,000 kW as your starting point for the calculations.

Helo, I found that their is a mistake in the slide at 13':20" where power consumption in DC are 105% ??? BTW, I follow your calculation with 113.000 sq ft with 900 racks x 16kw/rack. Then the total utility are huge: Utility 55.2MW and Generator size are 62.5MW Can you help ?

[@gogotraining3604]

Thank you for getting in touch with us. When you purchase the course on our site it comes with instructor support so you can ask questions as they pertain to the course.

[@gogotraining3604]

Dave checked the video at 13:29 and did not find anything related to power consumption in DE. Please get back to us with more details. Thank you.

[@JosueHermoza]

Excellent, thank you. Very usefull. (Y)

[@gogotraining3604]

You are very welcome.

[@Sattiraj100]

Plz make more videos about data center

[@gogotraining3604]

Hello Raja, thank you. We have full courses on the topics that are available for purchase on our site. Here is a link to part 1: gogotraining.com/training/courses/242/data-center-infrastructure-management-part-1/ Here is the link to part 2: gogotraining.com/training/courses/243/data-center-infrastructure-management-part-2/

[@karansudhakar5807]

No explanation about how you arrived at 323kW of cooling load?

[@gogotraining3604]

Hello Karan, this is part of a full course and you can see what is covered at this link: gogotraining.com/training/courses/242/data-center-infrastructure-management-part-1/

[@AjoyDas-lp8rw]

Lord Krisna blessed

[@luizfelipemaura9625]

I'm not sure if I get it right, but I'm used to having 1kW power for every 3kW cooling. Unless you are building your data center at the Sahara desert.

[@loser3685]

Using water cooling in the data center is not recommended

[@whereisthevolume3648]

This was helpful

[@gogotraining3604]

Thanks so much for letting us know. You can view the full course on our site, GogoTraining.com

[@shwetasharma7899]

excellent video