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Research Article

Numerical study on the optimal power distribution of server racks in a data center

MengXuan Song1,2, Kai Chen3( )
School of Energy and Materials, Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Polytechnic University, Shanghai 201209, China
Shanghai Thermophysical Properties Big Data Professional Technical Service Platform, Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, China
Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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Abstract

Data centers, as the infrastructure of all information services, cost tremendous amount of energy. Reducing the hot spot temperature in the data center room is benefit to prevent overheating of devices, and to increase cooling system efficiency. In this paper, we study the problem of optimal power distribution among racks for minimal hot spot temperature. The temperature rise matrix (TRM) model is used for the purpose of fast estimation of the thermal environment. The accuracy of the model is evaluated by conducting numerical simulations of computational fluid dynamics (CFD). Using the TRM model, optimal distributing of heating power is converted into a linear programming problem, which can be solved by highly efficient algorithms, such as Simplex. Furthermore, with realistic constraints including rack idle power and power upper limit, an iteration method is proposed to calculate the optimal power distribution along with the optimal on/off states of the racks. Obtained solutions are discussed and validated by comparing with CFD simulations. Results show that the TRM model is acceptable in evaluating temperature rises in the forced-convection-dominated scenarios, and the proposed method is able to obtain optimal power distributions under various levels of total power demand.

Keywords

numerical simulationdata centertemperature rising matrixpower distribution optimization

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Building Simulation
Volume 16 Issue 6,
June 2023
Pages 983-995
DOI: 10.1007/s12273-022-0981-1
Cite this article:
Song M, Chen K. Numerical study on the optimal power distribution of server racks in a data center. Building Simulation, 2023, 16(6): 983-995. https://doi.org/10.1007/s12273-022-0981-1

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Received: 10 November 2022
Revised: 05 December 2022
Accepted: 20 December 2022
Published: 20 February 2023
© Tsinghua University Press 2023
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