Development of the Ways to Increase the Lighting Energy Efficiency of Living Space

Two ways of increasing the energy efficiency related to the lighting of living space using suspended chandeliers are considered and developed. They include the use of new powerful LED light sources in household lighting and enhancing the use of solar energy for their power supply. The corresponding ways of engineering implementation are suggested for the purpose. A fundamentally new construction of the LED chandelier was designed, manufactured, and experimentally studied. The given LED chandelier contains a frame made of high-efficiency heat transfer devices which are made of heat pipes with capillary structure and Freon 141b as a heat carrier. Powerful volumetric LED modules installed on the heat pipes are used as light sources. These LED modules are performed as multifaceted prisms with flat sides and powerful LED arrays mounted on them. Due to the highly effective evaporation-condensation closed heat transfer cycle in heat pipes, the power and, accordingly, the light flux of the LED module increased more than twice (from 13 to 26.7 W) in comparison with direct replacement LED lamps. The graphic dependences of the LED arrays temperature on the electric power consumed by the LED module are experimentally obtained in the range of power values from 2.3 to 26.7 W. It is shown that the temperature of the LED arrays does not exceed + 60°C for a maximum power value of 26.7 W consumed by a LED module. A structural diagram of the construction of a combined power supply system is proposed for the chandelier using a solar energy. It is based on the use of a rechargeable battery with the ability of charging both from the solar battery (main mode) and from the mains (reserved mode). Using the conversion of an ecologically clean renewable solar energy into electric power supply of the chandelier, volumetric LED modules will allow one to significantly reduce the consumption of electricity from a centralized power network, to cut down the use of organic fuels for electricity generation, and to lower the amount of harmful emissions into the atmosphere due to the wide implementation of such systems in multiapartment and individual houses.