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[Network World] Swedish data center saves $1 million a year using seawater for cooling - Page 3

post #21 of 37
Quote:
Originally Posted by TFL Replica View Post

Indeed. They were able to cool several interconnected data centers all year round so even their warmest water temps are cold enough to get the job done. I wonder how warm the water is when it's exiting the last data center and whether or not it can be used for anything else (heating roads or homes?).

24°C

Put into a heat pump and used to heat homes and offices.
Quote:
Originally Posted by Article 
The water enters the first facility at 42.8 degrees Fahrenheit (6 degrees Celsius) and exits at 53.6 F (12 C). It's pumped to a second site, which it leaves at 64.4 F (18 C), and a third, which it leaves at 75.2 F (24 C). It's then sent to a heat pump and used to heat local homes and offices.
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post #22 of 37
Thread Starter 

Not sure how I missed that. tongue.gif

post #23 of 37
My local library uses a similar setup for air conditioning in the summer. And using geothermal heat in the winter. Good stuff.
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post #24 of 37
Quote:
Originally Posted by mushroomboy View Post

Im guessing the sea water is quite cool, the probably save enoug to keep replacing parts. I still wonder how they keep corrosion down. Cool none the less.

Use a sacrificial metal. Zinc is the best for this purpose.
post #25 of 37
Quote:
Originally Posted by Aparition View Post

I'd also like to know what they use. Galvanized metal? Glass? Do they liquid cool the servers then use the sea water to cool the liquid cooler?
Or does the sea water cooler some sort of air system?
The only logical way would be to have separate loops, with a water to water heat exchanger. And I doubt there is any metal whatsoever in the system, other than the heat exchanger. We use bromine in our evap tower, and that **** will corrode even stainless steel in concentrated amounts. If I drop a tablet into the tank instead of using the plastic bin I have in there, it will put a hole in it - and it's a major project to replace it.

All of the lines are schedule 80 pvc, 2" to 4" pipe depending where it is. I would imagine they use the same. That is how I would do it... PVC everywhere, anodized aluminum for the heat exchanger material would be the most resistant.

EDIT: Just saw the titanium heat exchanger idea. Makes more sense, as even aluminum will corrode.
Edited by Masta Squidge - 5/18/13 at 11:35am
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post #26 of 37
Quote:
Originally Posted by TheOx View Post

Use a sacrificial metal. Zinc is the best for this purpose.
That only prevents galvanic corrosion.
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post #27 of 37
I've heard similar things before, except with data centers in really cold parts of the world, so they don't need to pay for air conditioning, the computers mixed with the cold air keep it around a perfect temperature I guess. Pretty neat stuff!
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post #28 of 37
Quote:
Originally Posted by Fuell View Post

My local library uses a similar setup for air conditioning in the summer. And using geothermal heat in the winter. Good stuff.

My brother installed a geothermal system at his beach house. His break even point is about 7 years for his calculated cost savings, but he bit the bullet. I'm still debating on doing it on mine. Forking over $22,000 for a my system to save $300 a month for 9 months is a hard pill to swallow right now, even though the brake even point is only 9 years.
post #29 of 37
Quote:
Originally Posted by GingerJohn View Post

Well yes, it even says so in the article:
But you have to get the sea water to the exchanger, and build the exchanger out of something.

Given that plastics are not too great at heat transfer that leaves a titanium heat exchanger, probably shell and tube type rather than plate and frame - slightly harder to clean but a lot more resistant to blockages.

The sea water tubing to and from the heat exchanger could be plastic or titanium, again it depends on the pressure and flow rate.

I don't think its anything that fancy. The pipes are probably plastic and the heat exchanger copper with a sacrificial anode.
    
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post #30 of 37
I think there is a member here that hooked his PC's liquid cooling setup to his swimming pool. BTW, a basement swimming pool is a great way to do geothermal climate control in even a very large house because that water will basically be the same temperature year around. Not practical for most, but something to think about if you ever find yourself in the situation of building a brand new house.
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