1. Disabled
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## Power for cooling?

I would like to calculate how much power would I need to cool the full cabinet of simple 1 CPU 1U servers.

It is 50m2 room, low ceiling, current temperature 15C, good isolated (located in buildings basement)

The full cabinet will require around 4500W of power 230V, so it is fair to believe that we can cool it down with around 5000W of power?

2. Junior Guru
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4500w x 3.41 / 12000 = about 1.3 tons of cooling.

So size a 1.5 to 2 ton cooling unit. Make sure to factor in the rest if the room load.

3. Disabled
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I mean about approximate power needs for air cooler.

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I don't know what a 2 ton unit uses. But 3000 watts or less would be safe.

5. Junior Guru Wannabe
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Originally Posted by brendanm
I don't know what a 2 ton unit uses. But 3000 watts or less would be safe.
2 Tons is 7033 watts. Assuming 100% efficiency, which isn't very likely.

6. Disabled
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Can you please post some link of a "1.3 tons of cooling" A/C ?

7. Junior Guru
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Originally Posted by ST-3
2 Tons is 7033 watts. Assuming 100% efficiency, which isn't very likely.
That's how many watts of load (heat) that 2 tons will cool. He is asking how much power will be used by the hvac unit itself.

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As far as the HVAC unit itself if you want to know how much power a specific HVAC will use ask the manufacture. They can be all over the place in terms of efficiency and do not operate the same. Even the type of refrigerant used in your HVAC system is often changed based on location/climate

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Cooling should not account for more than 30% of the power consumed in a purpose built data center. So if you are drawing 10KW of power, you will likely use around 3KW to cool that amount of consumption. This is a general rule of thumb, and may not apply to your project. That's why many providers will charge at least 150% on the KW/h for submetered power tenants, and some of that bump accounts for cooling costs and some of it is margin. It's really not a question anyone can answer though because like multexsys stated, it depends on how power efficient your cooling unit will be, what temperature you plan on keeping your data center, if you have any type of air circulation etc...

10. THE Web Hosting Master
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Originally Posted by colosolutionz
Cooling should not account for more than 30% of the power consumed in a purpose built data center. So if you are drawing 10KW of power, you will likely use around 3KW to cool that amount of consumption. This is a general rule of thumb, and may not apply to your project. That's why many providers will charge at least 150% on the KW/h for submetered power tenants, and some of that bump accounts for cooling costs and some of it is margin. It's really not a question anyone can answer though because like multexsys stated, it depends on how power efficient your cooling unit will be, what temperature you plan on keeping your data center, if you have any type of air circulation etc...
For purpose built data centers, yes, but that isn't what this is. It is basically a single rack in a closet. I wouldn't be surprised if it is 50%+ here, as you're not getting the scale or efficiency of a purpose built DC.

To answer your question there are a lot of variables. Ask a local HVAC contractor about energy usage on a 2 ton unit.

11. Newbie
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Movincool makes 3 different sizes and they work great.
CM12, CM25 and CMW30
movincool.com

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You sound like you could be interested in the "data center in a box" : http://www.kellsystems.com/

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Oct 2010
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You should try to exhaust the heat from your "hot isle" without putting it through a radiator. This would be the cheapest.

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