Jackson Braz Marcinichen

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Cooling of datacenters is estimated to have an annual electricity cost of 1.4 billion dollars in the United States and 3.6 billion dollars worldwide. Currently, refrigerated air is the most widely used means of cooling datacenter’s servers, which typically represents 40e45% of the total energy consumed in a datacenter. Based on the above issues, thermal(More)
Due to the increase in energy prices and spiralling consumption, there is a need to greatly reduce the cost of electricity within data centers, where it makes up to 50% of the total cost of the IT infrastructure. A technological solution to this is using on-chip cooling with a singlephase or evaporating liquid to replace energy intensive air-cooling. The(More)
Despite many advances in electronics liquid cooling, air still remains one of the main means of cooling of high heat flux servers of datacenters. Regardless their long history of use, air-cooled blade servers continue to introduce strong nuisances that need to be considered during their implementation and operation, for instance: large energy consumption,(More)
In the present study, a simulation code specifically developed to evaluate the thermal-hydraulic performance of thermosyphon cooling loops is validated through the experimental results obtained in the Part 1. It considers levels of heat load conventionally observed in real servers of datacenters, which means idle, normal and maximum clock speed of actual(More)
This paper is the third part of the present study on two-phase mini-thermosyphon cooling systems. As mentioned in the first two parts, gravity-driven cooling systems using microchannel flow boiling are a very promising long-term viable solution for electronics cooling and more specifically for datacenter servers. Indeed, the enhancement of thermal(More)
Efficient, small, state-of-the-art passive cooling two-phase systems, i.e. advanced micro-thermosyphon cooling systems, are viable solutions for high performance datacenter servers and power electronics cooling applications. The objective of this study is to push through the “two-phase threshold” that seems to be hindering the application of(More)
Thermal designers of data centers and server manufacturers are showing a greater concern regarding the cooling of the new generation data centers, which consume considerably more electricity and dissipate much more waste heat, a situation that is creating a re-thinking about the most effective cooling systems for the future beyond conventional air cooling(More)
This paper is the fourth part of the present study on two-phase mini-thermosyphon cooling. As mentioned in the first three parts, gravity-driven cooling systems using microchannel flow boiling can become a long-term scalable solution for cooling of datacenter servers. Indeed, the enhancement of thermal performance and the drastic reduction of power(More)
This study compares the performance characteristics of a household refrigerator equipped with an Electronic Expansion Valve (EEV) with those with a capillary tube. A 513-liter top-mount refrigerator, originally equipped with a capillary tube, was retrofitted with a Pulse Width Modulated (PWM) expansion valve and extensively tested. Comparative analyses were(More)