Charging method of micro heat pipe for high‐power light‐emitting diode

Li, Congming; Luo, Yi; Zhou, Chuanpeng; Shan, Q.; Wang, Xiaodong

doi:10.1049/mnl.2015.0097

Cited by 6 publications

(5 citation statements)

References 21 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ceramic plate was used to heat the MHP, with the input power increased range from 1W to 10W. The thermal behavior testing system was introduced in detail in our previous work [12,13,14], thus we did not repetitious here. The tests were carried out in a vacuum chamber to reduce heat convent to the ambient.…”

Section: Methodsmentioning

confidence: 99%

Improve the Performance of Micro Heat Pipe by Surface Modification

Luo

et al. 2017

AMM

Self Cite

View full text Add to dashboard Cite

The appearance of high power LED has put forward higher requirements for thermal management. The micro heat pipe (MHP) has high heat transfer ability and plays an important role in high power LED and other high heat flux device cooling. In this paper, we designed and fabricated a micro heat pipe with fluoroalkyl silane (FAS) surface modified glass cover. The contact angle of the working area of glass cover reached 95.49° and made working fluid drops fall back to micro groove of silicon substrate more quickly. Thus the new glass cover can speed up the circulation of working fluid and enhance the heat transfer. The experimental results also proved that hydrophobic glass cover has a better heat transfer capability. Besides, this novel MHP reached the stable working status faster. When the input heat power was 10 W, the balance temperature of MHP with hydrophobic glass cover was 22 oC lower than traditional MHP, while the balance time is 58 seconds less. The work presented in this paper provides a new direction for optimize the MHP, not only the wick structure in substrate, but also the wettability of cover plate.

show abstract

Section: Methodsmentioning

confidence: 99%

Improve the Performance of Micro Heat Pipe by Surface Modification

Luo

et al. 2017

AMM

Self Cite

View full text Add to dashboard Cite

show abstract

“…N water is 322, higher than alcohol (17.5) or acetone (22.2). Optimized charging ratio was 30%, charging method refers to [12].…”

Section: Methodsmentioning

confidence: 99%

Influence of Parallel and Trapezoidal Wick Structures to the Heat Transfer Capability of MHPs

Luo

et al. 2017

AMM

Self Cite

View full text Add to dashboard Cite

Heat transfer capability of micro heat pipe (MHP) is relied on the thermal resistance of material, the specific phase change latent heat of working fluid, and the pattern of micro structures which is served as wick. In this paper, parallel and trapezoidal micro Cu structures were designed and fabricated by UV-LIGA. The capillary pressure and the effective coefficient of heat transfer conductivity of the micro grooves were calculated and results showed that trapezoidal grooves with small dimension in evaporator and large dimension in condenser (forward trapezoidal) have the best performance, because this structure can generate larger capillary force of working fluid and enhance the heat transfer. Two MHPs based on the calculations were fabricated and tested, results demonstrated that forward trapezoidal groove had the lowest equilibrium temperature while the inversed trapezoidal groove had the highest equilibrium temperature, approved the numerical calculation results. When the input power was 10W, the equilibrium temperature of forward trapezoidal, parallel and backward trapezoidal grooved MHP was 67.2 oC, 73.4°C and 89.1 oC, respectively. The forward trapezoidal grooves enlarge the capillary pressure and benefit the heat transfer of MHP.

show abstract

“…Based on the above design, a modified MHP charging method using the peristaltic pump is presented based on our previous work [30], as shown in Fig. 13.…”

Section: A Infusion Apparatus and Manipulationmentioning

confidence: 99%