Pekur D. Powerful LED lighting fixtures with LED cooling systems based on two-phase heat transfer devices.

Powerful LED lighting fixtures with LED cooling systems based on two-phase heat transfer devices The use of heat pipes in the creation of cooling systems for high-power LEDs allows one to implement fundamentally new lighting systems that can used for lighting of rooms with large area and ceiling height. The purpose of the dissertation is to develop and create powerful LED lighting fixtures with LED cooling systems based on two-phase heat transfer devices. Realization of this purpose allows to develop new designs of cooling systems of powerful LED lighting devices. The following scientific results have been obtained in the dissertation: - Ways of optimization of mass and dimensional characteristics and operational parameters of cooling systems of powerful and superpowerful LED structures for maintenance of their optimum operation temperature modes have been shown. - The designs of cooling systems of powerful LEDs capable of providing optimal operation temperature ranges of light-emitting structures with the minimum mass and dimensional characteristics of cooling systems are have been optimized. - On the basis of computer modeling methods and experimentally determined characteristics of the heat pipes, the designs of cooling systems of high-power LEDs have been optimized and new designs of cooling systems have been created. The designs have been protected by the patent of Ukraine. - For the first time, the samples of LED lighting fixtures with the power from 150 W to 600 W with original LED cooling systems based on two-phase heat transfer devices have been created, as well as their parameters and characteristics have been studied. - The energy efficiency of the created powerful lighting systems for lighting under specific conditions (rooms with a large area and height of the ceiling, difficult temperature conditions, etc.) has been shown. The practical value of the dissertation is that the developed cooling systems of high-power LEDs and created on their basis experimental samples of high-power LED lighting systems allow to implement a series of LED lighting systems of high (up to 300 W) and ultra-high (up to 600 W) power with optimum mass and dimensional characteristics. The developed LED lighting devices are differed by increased power, high light efficiency, optimum mass and dimensional parameters, reduced operation temperatures of LED lighting designs and power supplies, and, therefore, increased service life.