Characterization of miniature automatic energy transport devices based on the thermomagnetic effect

Lian, Wei; Xuan, Yimin; Li, Qiang

doi:10.1016/j.enconman.2008.09.005

Cited by 70 publications

(24 citation statements)

References 9 publications

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“…Some experimental investigations on such kind of loop have been carried out in our previous work [22][23][24]. We use the same experimental methods including the flow velocity measurement and temperature measurement in the present work for validating the proposed model and the numerical simulations.…”

Section: Model Validationmentioning

confidence: 95%

Design method of automatic energy transport devices based on the thermomagnetic effect of magnetic fluids

Lian

Xuan

2009

International Journal of Heat and Mass Transfer

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Section: Model Validationmentioning

confidence: 95%

Design method of automatic energy transport devices based on the thermomagnetic effect of magnetic fluids

Lian

Xuan

2009

International Journal of Heat and Mass Transfer

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“…Recently, several efforts have been devoted to the investigation of thermomagnetic circulation flow loops [9,[11][12][13][14], which demonstrated the feasibility of this kind of energy transport system and revealed its basic features. Results show that the thermomagnetic convection loop (without any moving parts) is a simple design, which is silent, self-driven, self-regulating and maintenance free.…”

Section: Thermomagnetic Liquid Cooling: a Novel Variable Speed Motor mentioning

confidence: 99%

Thermomagnetic liquid cooling: A novel variable speed motor drives thermal management solution

Karimi-Moghaddam¹,

Gould

Bhattacharya

2015

2015 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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Liquid cooling for thermal management has been extensively applied in high power electronic systems. However, the use of pumps may introduce reliability and mechanical limitations such as vibration, noise, leakage, and considerable power consumption. It has been shown that temperature sensitive ferrofluids in the presence of temperature field and magnetic field gradients are able to produce a liquid flow without a mechanical pump. This paper presents results from experiments using a single-phase, MnZn ferrite based ferrofluid operating under transient and steady laminar flow conditions in a partially heated thermomagnetic circulation loop under the influence of an external magnetic field created by a solenoid. The effects of several operational factors on the system performance are discussed. Additionally, the self-regulating feature of this cooling system is demonstrated as the heat load is increased a larger heat dissipation rate can be managed due to a stronger thermomagnetic convection effect.

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“…where α and β are the aspect ratios defined in Eqs. (8) and (9). H max may be given in terms of the power consumption (13),…”

Section: Maximum Field Strengthmentioning

confidence: 99%

“…The concept of using magnetically pumped ferrofluids for heat transfer has been demonstrated by a number of authors, see e.g. Lian et al [9] and Xuan and Lian [10]. In particular, Iwamoto et al [11] built an apparatus for measuring the net driving force of a thermomagnetic pump for different heat transfer rates and pipe inclinations.…”

Section: Introductionmentioning

confidence: 99%

Potential of enhancing a natural convection loop with a thermomagnetically pumped ferrofluid

Aursand

Gjennestad

Lervåg

et al. 2016

Journal of Magnetism and Magnetic Materials

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The feasibility of using a thermomagnetically pumped ferrofluid to enhance the performance of a natural convection cooling loop is investigated. First, a simplified analytical estimate for the thermomagnetic pumping action is derived, and then design rules for optimal solenoid and ferrofluid are presented. The design rules are used to set up a medium-scale (1 m, 10-1000 W) case study, which is modeled using a previously published and validated model (Aursand et al. [1]). The results show that the thermomagnetic driving force is significant compared to the natural convection driving force, and may in some cases greatly surpass it. The results also indicate that cooling performance can be increased by factors up to 4 and 2 in the single-phase and two-phase regimes, respectively, even when taking into the account the added heat from the solenoid. The performance increases can alternatively be used to obtain a reduction in heat-sink size by up to 75 %.

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Characterization of miniature automatic energy transport devices based on the thermomagnetic effect

Cited by 70 publications

References 9 publications

Design method of automatic energy transport devices based on the thermomagnetic effect of magnetic fluids

Design method of automatic energy transport devices based on the thermomagnetic effect of magnetic fluids

Thermomagnetic liquid cooling: A novel variable speed motor drives thermal management solution

Potential of enhancing a natural convection loop with a thermomagnetically pumped ferrofluid

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