Basic CFD model of heat pipe

Using the method of computer modelling, considered in this paper is optimization of a passive air system design for cooling the powerful LED luminaire based on heat pipes and cooling rings. Thermal and mass characteristics of the cooling system have been studied for various design parameters: distance between rings, thickness of ring materials and thermal loads. It has been shown that, to provide a minimal case temperature of LED source, the optimal distance between cooling rings should be 6 mm, but in this case the mass of cooling system is not least. To reduce the luminaire mass, it is reasonable to choose the distance between the cooling rings equal to 8 mm. Then the temperature of light source increases by only 1.8 °С, or by 2.2%, while the mass of cooling system reduces by 1357 g, or by 20.5%. At the same time, lowering the ring thickness from 2 down to 0.8 mm can in addition reduce this mass by 2700 g, or by 48.6%. However, when doing so the temperature of LED source case is increased by 5.9 °С. The offered cooling system based on heat pipes is capable to provide the thermal resistance 0.131 °С/W when scattering the thermal power 500 W under the maximum temperature of LED source crystal 135.5 °С. Recommendations for application of the developed cooling system have been formulated.

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Optimization of the cooling system design for a compact high-power LED luminaire

Pekur¹,

Nikolaenko²,

Сорокин³

2020

Semicond. phys. quantum electron. and optoelectron.

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Modification of a design of a wheel-tracked chassis of a mine clearing machine

BlatnickĂ¹,

DiĹžo²,

HaruĹĄinec³

2020

Manufacturing Technology

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This article is aimed at design of a support and a tension mechanism to be mounted on a wheel-tracked chassis of a mine clearing machine. The subject machine serves to detect and disposal mines in terrain. The main advantage of this machine is the possibility to use it from the safe distance thanks a remote control. The wheel-tracked chassis mounted on the machine ensures that the machine is able to overcome extreme obstacles of a terrain. The solved design of the wheel-tracked chassis can be modifying to move using just wheels for better driving properties on metalled roads. Current design of the wheeltracked chassis goes out from the older technical solution, which has been designed for a four-wheeled machine. The latest version of the chassis is designed for a six-wheeled machine. Application of an original structure of the chassis meets problems consisted in formation of cracks in tracks structure therefore the current structure of tracks has to be modified in order to meet all requirements in term of strength and long-term operation. At the same time, two design of a tension mechanism are presented. A tension mechanism is additional device, which will be mounted to the chassis and it will ensure the optimal position of tracks in every load case.

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Basic CFD model of heat pipe

Cited by 2 publications

References 7 publications

Optimization of the cooling system design for a compact high-power LED luminaire

Optimization of the cooling system design for a compact high-power LED luminaire

Modification of a design of a wheel-tracked chassis of a mine clearing machine

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