Abstract. 1 The promising environmentally friendly solar heating systems are based on the combined solar collector, in which the absorber made of constructive material of low-energy house was described. The usage of the combined absorber with an external protection of lowenergy house ensures sufficient efficiency of combined solar collector and reduces its cost. Three-factor planning matrix with the factors interaction was developed. Analytical and graphical dependencies of efficiency of the combined solar collector with a transparent coating and without it on the angle of incidence and intensity of heat flow were shown. The efficiency of transparent coating which protects the absorber of solar collector was researched. Ecological effect of using the combined solar collector was calculated.

The aim of the research was to explore the proposed solar installation, which consisting of a solar wall, storage tank, radiation sources and measuring equipment. The solar installation was tested in a circulating mode, which is an important point in energy conservation. Planning the installation of the collector heating system is still at the stage of building the house. Therefore, it remains relevant to replace the traditional boiler on the solar wall in quality of the solar collector, which will be used to heat water in the system and/or the pool completely free of charge. Proposed construction of the solar wall is effective for the solar heat supply system, at the same time the results of research confirm not only the efficiency of the system, but also allow for the design stage to take into account the practical efficiency of the system. Solar wall in circulation mode has a sufficiently effective coefficient for combined hot water supply or preheating of the heating medium of the heating system. The main theses of this work also would like to mark the affordability for the consumer, since the following design does not require a separate installation, and has the ability to mount in the existing wall

Purpose. Development of a new structural solution to the element of mine ventilation system to increase its efficiency due to equalization of the flow under different operating modes of radial fans. The task was set to investigate and analyze the effect of the mutual placement of flexible inserts and diffusers and their effect on the overall air flow field, and the energy efficiency of mine ventilation systems as a whole. methodology. A design of joining a radial fan to the air supply of a mine ventilation system has been developed. The mathemat ical processing of results obtained when measuring physical properties is performed on the basis of special programs developed. Theoretical, analytical and experimental methods were used. findings. According to results of experimental studies, the quality of the flow in the diffuser and the airline located directly behind the radial fan was estimated. Graphical and empirical dependencies are obtained. It is found that changing the diffuser design allows increasing system performance by 16 %. This is important for the further design of the mine ventilation network as it affects improving of the aerodynamic performance of the system. It is established that the most effective equalization of the output stream occurs in the "relatively long" diffuser extension, which is located directly after the fan and in the same diffuser expansion with the flow alignment plate, thereby increasing the flow through the system by 6.7 %. originality. Quality of the flow in the diffuser and the airline is estimated. It has been established that the most effective leveling of the flow of flux occurs in a diffuser located directly after the fan. The optimal location and the angles of inclination of the align ment plate in the design of the diffuser are determined. Practical value. The determined optimum locations and plate angles in diffuser expansion design can be used in the design of mine ventilation systems. This will also improve the aerodynamic performance of the mine ventilation system.

One of the important issues of energy policy the EU and Ukraine is the economical use of energy. An effective way to provide temperature conditions in production facilities is the use of infrared heaters. The main advantage of them is that they heat only the areas where heating is required. The purpose of the publication was mathematical modeling of heat regime formation in the irradiation area of infrared heater, which was designed the graphics dependence on the results of study. The results of mathematical studies were done concerning the determination of the intensity of radiation surface by the infrared heaters depending on surface temperature radiant heater, outside air temperature, air temperature and floor area. For analytical studies were used MATCAD 15.01. packages.

The solar energy that reaches the Earth is free, but installations to convert solar energy into heat, as well as equipment for transporting and storage that heat, require some investment. A significant part of the components of these systems are metals. Pipelines in solar collectors and heat exchangers are made of copper, aluminum is used for the absorber and housing, and the steel is often used in heat storage tanks. One of the options to reduce the cost of solar collectors and increase their efficiency is to use polymeric materials instead of metals. The main advantages of using polymeric materials in solar thermal collectors are their cost, especially if you are taking into account the growth of the renewable energy market and rising prices for metal . The use of polymers also reduces the costs of production, transportation and installation for the user.