NewNew Products
Products“Stand Kicker”, a Heat Pipe Radiator for Power LEDs

1.

INTRODUCTION

LEDs are the expected asset card of energy saving. Theirapplications for large illumination devices and UV irradiators, which need high brightness, have been spreading
rapidly. The luminance efficiencies (lm/W) of white LEDs
have been being developed significantly since they were
put to practical use in 1996. They last longer than fluorescents, which are the mainstream illumination devices.
Also, their luminance efficiencies are in the process ofreaching the same level as those of fluorescents.
However, the luminance efficiencies above indicate thevalues of LED elements alone. When they are installed
and used in illumination devices, efficiencies decrease
due to rise in the temperature, and about 80% of thepower consumption becomes a loss under the present
emission characteristics.
Loss heat, which accounts to a large part of the loss, isdiffused from the elements themselves. The luminanceefficiencies decrease when the temperatures of LEDs rise.
Also, radiation is important because related parts such as
packages deteriorate due to heat, and that has an influence on its lower luminance and its life.
In the case of LED illumination devices used in livingrooms, applying simple die casting fins is enough against
radiation because their heat release values are several W.
On the other hand, when changing high-ceiling illumination devices in factories, gyms, auditoriums, stages, andetc. into LED illumination devices, the heat release valuesof LED elements in LED illumination devices, which havethe same level of brightness comparable to 600 W-classmercury lamps for example, are about 150 W. Moreover,when changing greater than or equal to 1 kW-class, outdoor (race tracks, airports, expressways, etc.) mercury
lamps into LED illumination devices, they generate morethan 300 W of heat.
It was difficult to put them in practical use because theirfrequent applications in high altitudes make radiatorsthemselves too large and heavy if radiation was attempted by existing extruded materials or die casting fins.
In order to put long-lived and highly reliable LED illumination devices into practical use, there is a need to develop a new lightweight, small sized and high-performance
radiator which cools down effectively without fans.
Our company has developed the “Stand Kicker”, a lightweight (less or equal to 30%: solid heat sink basis) andsmall sized high-performance radiator, which cools downwith natural convection. It is consisted of “heat pipes”,
which are the superconductors of heat, and longitudinalfins, which are suitable for natural convection cooling.

2.

CONSTRUCTION OF THE PRODUCTAND CHARACTERISTICS

The following explains the construction of this product.
Heat pipes are placed on a heat receiving base plate
which is intended to LED elements attachment, and thepipes are extended in nearly perpendicular directions.
Several aluminum radiation fins are placed longitudinallyin the direction of the heat pipes at intervals with the heatreceiving base plate. The effective joint of longitudinal finsand heat pipes brought the achievement of lightweightand small sized natural convection cooling. The developed “Stand Kicker” lines up with various forms in order
to apply to heat release values of LEDs from 100 to 1,000 W.
We can also provide the heat pipe radiator “Stand Kicker”
in various forms according to the design requirements ofcustomers.

Figure 1 Appearance of “Stand Kicker”.

Air flow

LEDattachment
plate

Heatradiation
fins
Heatgeneration

Heat pipe← Vapor stream→ Reflux liquid
Air flow

Lightemitting

Figure 2 Application to a LED illumination device.

Furukawa Review, No. 43

2013

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“Stand Kicker”, a Heat Pipe Radiator for Power LEDs

3.

CONCLUSION

The developed “Stand Kicker” is optimal for ceiling illumination devices and projectors using high brightness LEDs
especially placed in high altitudes because it is smaller
and lighter compared with the existing heat sinks.
In addition, applications for outdoor illuminations suchas road illuminations and ground illuminations, for indoorilluminations such as stage and museum illuminations,and also for industrial equipment such as UV irradiatorsand exposure equipment, are effective.
For more information, please contact:
2nd Sales & Technology Department
NTEC Co., Ltd.
TEL: +81- 46-268-7444
URL http://www.ntec-fec.com

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