Effect of warm water cooling for an isolated hybrid liquid cooled server

Addagatla, Alekhya; Fernandes, John; Mani, Divya; Agonafer, Dereje; Mulay, Veerendra

doi:10.1109/semi-therm.2015.7100161

Cited by 5 publications

(4 citation statements)

References 13 publications

(12 reference statements)

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“…In all, the vapor chamber not only increases the general thermal conductivity, but also smooths the temperature distribution of the heat source in an automatic manner. To verify the benefits, we use the 3D-ICE thermal simulator [84] to obtain the die 3 temperature distribution under the commonly used cold plate and vapor chamber-based cold plate. As plotted in Fig.…”

Section: Mini Loop: Chip-level Hotspot Dispersion With Two-phase Vapo...mentioning

confidence: 99%

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CoolEdge: hotspot-relievable warm water cooling for energy-efficient edge datacenters

Pei

Chen

Zhang

et al. 2022

Proceedings of the 27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems

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As the computing frontier drifts to the edge, edge datacenters play a crucial role in supporting various real-time applications. Different from cloud datacenters, the requirements of proximity to end-users, high density, and heterogeneity, present new challenges to cool the edge datacenters efficiently. Although warm water cooling has become a promising cooling technique for this infrastructure, the one-size-fits-all cooling control would lower the cooling efficiency considerably because of the severe thermal imbalance across servers, hardware, and even inside one hardware component in an edge datacenter. In this work, we propose CoolEdge, a hotspot-relievable warm water cooling system for improving the cooling efficiency and saving costs of edge datacenters. Specifically, through the elaborate design of water circulations, CoolEdge can dynamically adjust the water temperature and flow rate for each heterogeneous hardware component to eliminate the hardwarelevel hotspots. By redesigning cold plates, CoolEdge can quickly disperse the chip-level hotspots without manual intervention. We further quantify the power saving achieved by the warm water

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Section: Mini Loop: Chip-level Hotspot Dispersion With Two-phase Vapo...mentioning

confidence: 99%

“…Warm water cooling: Warm water cooling has been utilized by many works to reduce cooling costs [3,21,39,41,46,77,118]. Jiang et al [41] propose a fine-grained warm water cooling solution to improve cooling efficiency by eliminating hotspots with TECs.…”

Section: Related Workmentioning

confidence: 99%

CoolEdge: hotspot-relievable warm water cooling for energy-efficient edge datacenters

Pei

Chen

Zhang

et al. 2022

Proceedings of the 27th ACM International Conference on Architectural Support for Programming Languages and Operating Systems

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“…Tradicionalmente, la mayoría de los centros de procesamiento de datos adoptan refrigeración por aire donde las unidades de aire acondicionado de la sala de computadoras bombean volúmenes de aire refrigerado para enfriar los equipos y eliminan el calor al ambiente. A medida que los centros de datos aumentan de tamaño y los sistemas actuales de refrigeración por aire alcanzan sus limitaciones, la tecnología de refrigeración evolucionará inevitablemente hacia sistemas de refrigeración por líquido-aire (híbrido) o líquido [1], [2], [3]. El enfriamiento por agua de los servidores está emergiendo a las plataformas de computación de alto rendimiento debido a los requisitos para el enfriamiento efectivo de servidores de alta densidad y también para el reciclaje efectivo del calor residual [4].…”

Section: Introductionunclassified

Estudio Numérico Mediante CFD del Proceso de Enfriamiento con Intercambiadores de Calor en Sistemas Computacionales

Toapanta-Ramos

Cortez²,

Quitiaquez³

et al. 2021

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El presente artículo científico trata el estudio y simulación de un radiador que se basa en un intercambiador de calor tubular de flujo cruzado, el cual tiene un propósito de refrigerar el procesador, tarjeta gráfica de una CPU o diversos hardware en los sistemas de computación. Se realizan diversas simulaciones en el programa ANSYS teniendo varias temperaturas de ingreso que van en rangos desde 75 °C hasta 90 °C y con flujos másicos diferentes. Los resultados muestran que, al aumentar la temperatura de ingreso del fluido a refrigerar, la salida de este fluido tambien aumenta. Sin embargo, cuando se aumenta el flujo másico existe una merma en el rechazo de calor en los dispositivos computacionales.

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“…Addagatla et al [11] studied the effect of inlet water temperature on the thermal performance and power consumption of hybrid liquid/air cooled 2OU (OpenU) server for a wide range of CPU workloads and showed that the cooling power consumption decreases from 7.86 to 4.92W when the server inlet temperature increases from 27.5 to 45 , respectively. Druzhinin et al [12,13] found that increasing the inlet water temperature to the RSC Tornado server from 19 to 65 decreases the computational performance of the server from 2.72 to 2.44 GFLOPS/W while increasing the server power consumption from 365 to 398W, respectively.…”

Section: Introductionmentioning

confidence: 99%

Rack Level Study of Hybrid Liquid/Air Cooled Servers: The Impact of Flow Distribution and Pumping Configuration on Central Processing Units Temperature

Kadhim

Kapur

Summers

et al. 2019

Heat Transfer Engineering

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The flow distribution and central processing unit (CPU) temperatures inside a rack of thirty 1U (single rack unit) Sun Fire V20z servers retrofitted with direct to chip liquid cooling and two coolant pumping configuration scenarios (central and distributed) are investigated using the EPANET open source network flow software. The results revealed that the servers in the top of the rack and close to the cooling distribution unit can receive up 30% higher flow rate than the servers in the bottom of the rack, depending on the pumping scenario. This results in a variation in the CPU temperatures depending on the position in the rack. Optimisation analysis is carried out and shows that increasing the flow distribution manifold's dimensions can reduce the flow variation through the servers and increase the total coolant flow rate in the rack by roughly 10%. In addition, activating the small pumps in the direct to chip liquid cooling loops inside the servers (distributed pumping) resulted in an increase of 2 in the CPU temperatures at the high computational workload.

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Effect of warm water cooling for an isolated hybrid liquid cooled server

Cited by 5 publications

References 13 publications

CoolEdge: hotspot-relievable warm water cooling for energy-efficient edge datacenters

CoolEdge: hotspot-relievable warm water cooling for energy-efficient edge datacenters

Estudio Numérico Mediante CFD del Proceso de Enfriamiento con Intercambiadores de Calor en Sistemas Computacionales

Rack Level Study of Hybrid Liquid/Air Cooled Servers: The Impact of Flow Distribution and Pumping Configuration on Central Processing Units Temperature

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