Publication

Cooling of microprocessors with micro-evaporation: A novel two-phase cooling cycle

John Richard Thome, Jackson Braz Marcinichen, Bruno Michel
2010
Journal Articles

Abstract

Three micro-evaporator cooling cycles, one with a pump, one with a compressor and a hybrid of the two together, are proposed for cooling a computer blade server. The hybrid cycle is characterized by the interchangeability between the first two cycles, where the decision on the cycle to operate is based on the season (necessity or economical benefit for heat recovery) or the maintenance of cycle's driver. The main characteristics of each cycle are presented as well as the details of the micro-evaporator cooler for the blade's CPU. Analysis of the cycle overall efficiency and the potential for heat recovery shows that the best cycle to use depends mainly on the end application of the heat recovered. Four refrigerants were evaluated as the possible working fluids for cooling the microprocessors. HFC134a and HFC245fa were found to be the best choices for the desired application. (c) 2010 Elsevier Ltd and IIR. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/7d8cd119-7e22-4eb3-8858-68cea02764e0

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John Richard Thome, Jackson Braz Marcinichen, Bruno Michel
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7d8cd119-7e22-4eb3-8858-68cea02764e0

About this result

Ontological neighbourhood

Mechanical engineering

Thermal engineering: Air conditioning

Related concepts (27)

Evaporative cooler

An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles. Evaporative cooling exploits the fact that water will absorb a relatively large amount of heat in order to evaporate (that is, it has a large enthalpy of vaporization).

Computer cooling

Computer cooling is required to remove the waste heat produced by computer components, to keep components within permissible operating temperature limits. Components that are susceptible to temporary malfunction or permanent failure if overheated include integrated circuits such as central processing units (CPUs), chipsets, graphics cards, and hard disk drives. Components are often designed to generate as little heat as possible, and computers and operating systems may be designed to reduce power consumption and consequent heating according to workload, but more heat may still be produced than can be removed without attention to cooling.

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A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment.

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