On Economic Cooling of Contained Server Racks using an Indirect Adiabatic Air Handler

Proceedings

Document identifier: oai:DiVA.org:ltu-75915
Access full text here:10.23919/SEMI-THERM50369.2020.9142828
Keyword: Engineering and Technology, Electrical Engineering, Electronic Engineering, Information Engineering, Control Engineering, Teknik och teknologier, Elektroteknik och elektronik, Reglerteknik, Data center thermal models, Indirect adiabatic cooling, Server thermal models, Energy efficient cooling
Publication year: 2020
Abstract:

We study the economic operation of a free-cooling setup in which an Indirect Adiabatic Air Handler (IAAH) recovers heat from an array of server racks placed in a contained aisle. For this setting we propose two different control policies: in the first approach, the airflow supply rate to the racks is maintained constant while only the process- side operations of the IAAH are optimized. In the second approach, also the room-side rate is updated adaptively. Building on calibrated models of the IAAH and the servers, we design experimental trials considering different outdoor temperatures and humidity conditions as well as varying computational workloads. The in silico analysis contributes actionable insights on the optimal thermal and cost operations of the system.

Authors

Riccardo Lucchese

Luleå tekniska universitet; Signaler och system
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Michele Lionello

Università degli Studi di Padova, Dep. of Information Engineering via Gradenigo 6, 35313, Padova, Italy.
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Mirco Rampazzo

Università degli Studi di Padova, Dep. of Information Engineering via Gradenigo 6, 35313, Padova, Italy.
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Andreas Johansson

Luleå tekniska universitet; Signaler och system
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Wolfgang Birk

Luleå tekniska universitet; Signaler och system
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