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Controlled Direct Liquid Cooling of Data Servers

Lucchese, Riccardo; Varagnolo, Damiano; Johansson, Andreas
Journal article, Peer reviewed
Accepted version
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Lucchese R. (2.442Mb)
URI
https://hdl.handle.net/11250/2735556
Date
2020
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  • Institutt for teknisk kybernetikk [2866]
  • Publikasjoner fra CRIStin - NTNU [26746]
Original version
IEEE Transactions on Control Systems Technology. 2020, .   10.1109/TCST.2019.2942270
Abstract
We formulate a modeling and control framework aimed at direct liquid cooling of data servers. In our application scenario, the server's heat load is rejected into a liquid cooling circuit that extends to individual chips. We start with a comprehensive discussion of our modeling derivations. We then show how to dynamically provision the coolant, while 1) regulating the temperatures of any self-heating components within the safe operational envelope; 2) minimizing the coolant supply cost; and 3) increasing the server outflow temperature (a key performance objective toward heat recovery systems). We confirm experimentally the benefits of the proposed controlled cooling strategy over several realistic scenarios corresponding to different inlet coolant temperatures and computational loads.
Publisher
IEEE
Journal
IEEE Transactions on Control Systems Technology

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