Spondoolies SP35 - Heat + Noise

[Jamphone]

@Jamphone I am interested if you could elaborate your response regarding it not paying for itself.

So air conditioning - absent a circulation system that has access to cold air - will use as much energy to cool the air as the SP35 used to heat the air, which is basically all of the energy that went into the SP35. Computers radiate out more than 99% of the energy that goes into them as heat.

If you have an ability to pump in cold air, you may be able to reduce your air conditioning costs.

But if this is straight AC, then you will essentially double your energy usage. Right now, this SP35 will us roughly 2500 KW a month, and cost up to 2500 KW a month in AC. So that's a total energy usage of 5000 KW. 5.5 TH will make you $400/month right now.

So if your power is 10 cents/kwh, you'll be losing $100/month at a full 100% AC set up.

So presuming a slightly more efficient AC set up, you'll be breaking even. ie. The increase in your power bill will be as much as you mine each month.

[MrTeal]

@Jamphone I am interested if you could elaborate your response regarding it not paying for itself.

So air conditioning - absent a circulation system that has access to cold air - will use as much energy to cool the air as the SP35 used to heat the air, which is basically all of the energy that went into the SP35. Computers radiate out more than 99% of the energy that goes into them as heat.

If you have an ability to pump in cold air, you may be able to reduce your air conditioning costs.

But if this is straight AC, then you will essentially double your energy usage. Right now, this SP35 will us roughly 2500 KW a month, and cost up to 2500 KW a month in AC. So that's a total energy usage of 5000 KW. 5.5 TH will make you $400/month right now.

So if your power is 10 cents/kwh, you'll be losing $100/month at a full 100% AC set up.

So presuming a slightly more efficient AC set up, you'll be breaking even. ie. The increase in your power bill will be as much as you mine each month.

That'd be a pretty crappy AC. Datacenters sometimes use a 1:1 rule because AC can be implemented crappily in old DC, but that is not the fault of AC itself. The COP of a decent air conditioner with a SEER of 16 is 3.75, which means you need to use 1J worth of AC to remove 3.75J of heat. In power terms, it would take 1W of A/C to remove the heat from 3.75W of power, and would vent 4.75W outside.

Even cheap old ones should have a COP of 3 or so. The minimum the US has allowed to be sold for residential use since 2006 (at least according to that WP article) is SEER 13 or COP 3.2.

[wh00per]

Yes I presume a lot. Could his work be ok with the increased cost of hosting a SP35? Sure. He could be trading his services for the hosting of his equipment. In this case it could be a good exchange for both parties. If everyone is aware of what is going on and ok with it then I say more power to him and why not buy a second SP35 and have them foot the electric bill. If they really don't know and he values his job then better make sure they are aware so he doesn't get fired.  All I am saying.

If the CFO is talking about a $600 increase for the electricity bill of a TEST RACK, I would not want to work there. The parking lot lighting is more than that usually, and no one remembers to turn it off.

[dogjunior]

Yes I presume a lot. Could his work be ok with the increased cost of hosting a SP35? Sure. He could be trading his services for the hosting of his equipment. In this case it could be a good exchange for both parties. If everyone is aware of what is going on and ok with it then I say more power to him and why not buy a second SP35 and have them foot the electric bill. If they really don't know and he values his job then better make sure they are aware so he doesn't get fired.  All I am saying.

If the CFO is talking about a $600 increase for the electricity bill of a TEST RACK, I would not want to work there. The parking lot lighting is more than that usually, and no one remembers to turn it off.

So what you are saying then is if they don't notice or don't care then it is ok to steal $600 a month from work.

[warrmr]

As nothing useful is now being added to this thread I am locking it.

Any cost implications are between myself and my manager and nothing to do with a public forum.

I have received the information I needed so I thank those who participated and provided an answer without starting an argument over who is paying for the hosting of my server.