Refrigerating liquid prototype for LED's thermal management

Faranda, R.; Guzzetti, Stefania; Lazaroiu, George Cristian; Leva, Sonia

doi:10.1016/j.applthermaleng.2012.05.018

Cited by 30 publications

(13 citation statements)

References 19 publications

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“…The knowledge of the power and harmonic absorptions of each device influences their right application and management [11][12][13][14][15][16][17][18]. In the present paper, three experimental studies are performed, investigating the power consumptions and harmonic absorptions of different types of indoor luminaries.…”

Section: Introductionmentioning

confidence: 99%

Power Quality and Harmonic Analysis of End User Devices

Dolara

Leva

2012

Energies

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Among the non-linear loads used in household, Compact Fluorescent Lamps (CFLs) and LED lamps are becoming more widespread, while incandescent lamps are intended to be replaced by these types of lighting devices. LEDs and CFLs are significantly more efficient and economical than incandescent lamps, and are expected to be used in 100% of residential lighting in the future. As nonlinear loads, LEDs and CFLs produce highly distorted currents. A large number of customers using LEDs or CFLs for domestic, commercial and industrial lighting could determine important Power Quality problems. The paper reports experimental measurement results regarding Power Quality in indoor lighting systems. The harmonic absorptions of several types of luminaries are analyzed, highlighting the impact behavior of different lamps function of used luminaries' technologies. The recorded harmonic absorption allows characterizing the harmonic spectrum variability of the investigated lamps.

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Section: Introductionmentioning

confidence: 99%

Power Quality and Harmonic Analysis of End User Devices

Dolara

Leva

2012

Energies

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“…In a laboratory test, the amber color is imposed on a power LED supplied with constant current. The increase of junction temperature with 10 • C determines a 5% decrease of the light flux, a reduction of the direct voltage of 20 mV, and a translation motion of the fundamental wavelength of 2 nm toward high wavelengths [23].…”

Section: Led Dimming Methodsmentioning

confidence: 99%

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

Kıyak

2012

International Journal of Photoenergy

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Light emitting diodes (LEDs) have many positive features, such as long life, low power consumption, and high luminous efficacy. Consequently, they are very attractive for use in many applications. Also, the use of LEDs ensures energy savings. Power LEDs have increasingly been used for general lighting via multichip module technology. The output of power LEDs should be controlled to obtain life and illuminance values in catalog. In this study, the effects of different dimming methods are investigated for single-and multichip LEDs. To achieve this aim, pulse width modulation (PWM) and current variation (CV) dimming methods are applied to single and multichip power LEDs during ten stages of dimming. A current-regulated DC source is used for current variation (CV) dimming, and a driver designed by the researcher is used for pulse width modulation (PWM) dimming. Moreover, all of the applications are made for active and passive cooling. Finally, the results are compared.

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“…Results showed that the junction temperature of the LED package could be forecast precisely with the developed model. A novel thermal management scheme for LED was developed by R. Faranda et al [5]. In their study the employment of refrigerating liquid incorporated inside a fabricated prototype were developed and characterized.…”

Section: Introductionmentioning

confidence: 99%

5mm X 5mm Copper-Diamond Composite Slug Stress Evaluation on LED

Vairavan

Sauli

Retnasamy

et al. 2013

2013 7th Asia Modelling Symposium

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Light-emitting diodes (LEDs), have materialized as an innovative light source which features energy saving properties, good optical performance and efficacy which is added advantage over orthodox lighting systems. However, the efficacy of the LED is influenced by heat generated at the junction of the LED. Hence, in this study, the thermal and stress analysis of single chip LED package with copper diamond heat slug with dimension of 5mm x 5mm x 1mm was carried out through simulation under natural convection condition. Input power of 0.1W and 1W were applied to the single chip LED model. Result of the simulation indicates that at input power 1W, junction temperature of 107.02 °C and stress of 104.59 MPa were obtained.

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Refrigerating liquid prototype for LED's thermal management

Cited by 30 publications

References 19 publications

Power Quality and Harmonic Analysis of End User Devices

Power Quality and Harmonic Analysis of End User Devices

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

5mm X 5mm Copper-Diamond Composite Slug Stress Evaluation on LED

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