Determination of relative positions and phase angle of dual piezoelectric fans for maximum heat dissipation of fin surface

Huang, Cheng‐Hung; Fan, Guang Yi

doi:10.1016/j.ijheatmasstransfer.2015.09.006

Cited by 10 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Oscillation amplitude is enhanced by air-coupling and, assuming proportionality with induced airflow [26], logic suggests a PE fan array's performance would increase by a factor greater than N , the number of blades in the array. This hypothesis is not backed up by results published by Huang and Fan [52]. Results show, when P /W =1.79, inphase oscillation creates the greatest air velocity magnitudes at a surface normal to the DDV, whilst counter-phase is actually less effective than 30°or 90°out-ofphase oscillation.…”

Section: Edge-to-edge Orientationmentioning

confidence: 65%

“…Huang and Fan [52] demonstrate that a similar method validates their model to a maximum error of 0.68%. The temperature fluctuations across a cooled surface are compared in kelvin and therefore in the region of 300K.…”

Section: Experimental Validationmentioning

confidence: 84%

“…Vortex formation from ETE, in-phase oscillation is similar to that of a single blade [52]. In use in an unconfined space, therefore, the design does not appear logical.…”

Section: Edge-to-edge Orientationmentioning

confidence: 99%

See 2 more Smart Citations

A review of piezoelectric fans for low energy cooling of power electronics

Hales

Jiang

2018

Applied Energy

View full text Add to dashboard Cite

Power consumption from electrical devices increases year upon year, and as a result thermal management of power electronics is becoming ever more relevant. This review summarises the advancements made in the piezoelectric fan optimisation since their invention in the late 1970s. Energy consumption is highly relevant, and is an underlying theme throughout. Emphasis is placed on the methods undertaken to optimise designs for many different applications, and critical analysis of these processes is included. Comparison of data taken from different studies highlights the well-established rules of piezoelectric fan design and, more importantly for future advancements, also identifies the aspects of design which are not fully understood. Numerical modelling has become an

show abstract

Section: Edge-to-edge Orientationmentioning

confidence: 65%

Section: Experimental Validationmentioning

confidence: 84%

See 1 more Smart Citation

A review of piezoelectric fans for low energy cooling of power electronics

Hales

Jiang

2018

Applied Energy

View full text Add to dashboard Cite

show abstract

“…Extensive research devotes to revealing the structural and dynamic characteristics of PE fans. To improve the PE fan's performance, various factors (shape of vibrating mode [10][11][12][13], vibrating phase difference [14], fan thickness [15], fan array [16][17][18][19], and fan orientation [20][21][22], etc.) have been intensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Analysis of Charge Recovery for Piezoelectric Fan

Zhen-wei

Wei

et al. 2022

Actuators

View full text Add to dashboard Cite

The piezoelectric (PE) fan is widely adopted in the field of microelectronics cooling due to its advantages of high reliability and good heat dissipation characteristics. However, PE fans driven by conventional circuits suffer from plenty of energy loss. To save energy, we propose an inductor-based charge recovery method and apply it to the driving circuit for the PE fan. Two inductor-based driving circuits, a single inductor-based driving (SID) circuit and a double inductor-based driving (DID) circuit are compared. The SID circuit has a simple structure and a slightly higher energy-saving rate, while the DID circuit introduces no additional oscillations and is more stable. The experimental results show that when the supply voltage changes, both circuits have a relatively stable energy-saving rate, which is about 30% for the SID circuit and 28% for the DID circuit. Moreover, the proposed circuits enjoy the same driving capacity as the conventional circuit, and the driven fan has the same cooling performance.

show abstract

“…Huang et al [17] used 3D numerical simulation in conjunction with an inverse design technique to determine the optimum position of a fan blade for maximum heat transfer performance. A similar approach was used to find the optimal positions and phase angle of a dual piezoelectric fan assembly [18]. Petroski et al [19] attempted to tailor air flows created by piezoelectric fans using complex…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of power dissipation in piezoelectric fans and their correlation with convective heat transfer performance

Ebrahimi

Wang

2018

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Piezoelectric fans offer an intriguing alternative to conventional rotary fans for thermal management of portable and wearable electronics due to their scalability, low power consumption and simple mechanical construct. We report a combined experimental and modeling study to help elucidate power dissipation mechanisms in piezoelectric fans. To analyze contributions from these different mechanisms, mathematical models that account for mechanical hysteresis, dielectric loss and viscous damping from generated air flows are used in conjunction with vibration amplitudes and power consumption data obtained experimentally from piezoelectric fans of different blade lengths, thicknesses and mass distributions. In parallel, we perform experiments on convective heat transfer coefficients and aerodynamic forces acting on surfaces that are oriented perpendicular with respect to fan-induced air flows. These experiments establish that the portion of power dissipation ascribed to air flows correlates well with the heat transfer performance and aerodynamic force. A power ratio, defined as the fraction of the air flow power to the total power dissipation, is then proposed as a useful indicator of the power efficiency of the piezoelectric fans. We show that the power efficiency exhibits a peak at a bias voltage amplitude that balances parasitic power dissipation, due in particular to mechanical hysteresis loss and the dielectric loss, with power dissipation directly linked to actual air flow generation. Lastly, we relate the air flow power to the blade's geometrical parameters to facilitate systematic optimization of the blades for both cooling performance and power efficiency.

show abstract

Determination of relative positions and phase angle of dual piezoelectric fans for maximum heat dissipation of fin surface

Cited by 10 publications

References 19 publications

A review of piezoelectric fans for low energy cooling of power electronics

A review of piezoelectric fans for low energy cooling of power electronics

Design and Experimental Analysis of Charge Recovery for Piezoelectric Fan

Mechanisms of power dissipation in piezoelectric fans and their correlation with convective heat transfer performance

Contact Info

Product

Resources

About