Wednesday, May 12, 2010

Liquid Cooling and Reuse of Waste Heat in Super-Computers (Aquasar)

Aquasar is a joint project between the LTNT group at ETH and the IBM research lab in Zurich. In traditional air-cooling a huge amount of energy is consumed to cool super-computers. Switching to liquid-cooling has two advantages:

  • The energy consumption of the cooling system is reduced because only pumping power is required instead of using highly power consuming chillers to cool down the air before entering the system.
  • Connected to a heat exchanger the heated liquid can be reused for further applications.

These features result in a more efficient energy use which reduces the carbon footprint of super-computers.

zimmermannkasten
Figure 1: Liquid cooled blade used for the Aquasar-system (courtesy of IBM Research - Zurich)

The Aquasar-system will be installed at ETH Zurich to provide a first working example for the reuse of heat in liquid-cooled super-computers. The waste heat will be used in the heating system of the ETH. This project involves computational and experimental analysis of important parameters in order to optimize the system.

Thanks to Mai Ban http://maiban.posterous.com/

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I don't know why I'am posting this cat video.

I don't know why I find it disturbing. Because of all this water wasted maybe ?

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Sunday, May 9, 2010

Conan O'Brien @Google: "It's not Democratic at all!"

It wasn't a brillant idea to ask an ex Microsoft General Manager to do the interview... or was it?

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Sun/Oracle removed public firmware downloads

This is (very) bad new for Sun collectors/hobbyists. Why am I not surprised?

Sun/Oracle removed public firmware downloads

In a somewhat surprising move (and without any notification to customers), Oracle shut down public access to firmware downloads. 

Read more at :

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Sunday, May 2, 2010

New Google Documents Format Bug

If you get the following error message from Google Documents, it means that your document is GONE.


Of course. you get the message when you try to (re)open it from the main document list.
This is maybe why you don't want to enable the new Google Documents format (see https://docs.google.com/support/bin/answer.py?answer=176442).


The bad news is that Google Docs has just encountered an error.
The good news is that you've helped us find a bug, which we are now looking into.

We apologize for any inconvenience this has caused you.
In the meantime, if you'd like updates on this and other issues, try visiting our Google Docs Help Group: http://groups.google.com/group/GoogleDocs


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