An effective method of reducing the temperature gradient in data centers (or “hot” and “cold” spots) is to minimize the maximum temperature at the rack exit plane. For a given rack’s heat load, one way to achieve this is to vary the chassis flow rate in such a way that the rack exit temperature gradient is small. In this paper, a simple algorithm based on the energy equation is developed to set the chassis flow rate such that the exit rack temperature is uniform. When compared to a constant chassis flow rate algorithm, the proposed method is demonstrated through CFD simulations to achieve significant reduction in maximum chassis inlet temperature for the same CRAH flow rate.
- Electronic and Photonic Packaging Division
Reduced Rack Exhaust Temperature Gradient via Variable Chassis Flow Rate
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Dang, T, Serreli, C, Khalifa, HE, Schmidt, RR, & Iyengar, M. "Reduced Rack Exhaust Temperature Gradient via Variable Chassis Flow Rate." Proceedings of the ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems. ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 2. Portland, Oregon, USA. July 6–8, 2011. pp. 451-459. ASME. https://doi.org/10.1115/IPACK2011-52067
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