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- Author or Editor: Stepan Shapoval x
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Abstract
According to the energy development strategy of Ukraine, implementation of energy efficient buildings is needed, in which external protections are converters of solar energy into heat. The article presents studies of solar coating with direct coolant supply. Studies of the average value of the heat loss coefficient of the solar coating were also carried out. As a result, the efficiency of the solar coating under the mode of forced circulation of the coolant is 0.67, at natural circulation of the coolant – 0.57 and at its direct supply is 0.71. Experimental researches of thermal and physical parameters of a solar covering and system of heat supply on its basis showed in the corresponding dependences influence on its thermal characteristics of dynamic modes of the heat carrier, energy, kinetic characteristics of the environment.
Abstract
In line with the energy development strategy of Europe, it is necessary to implement energy efficient buildings, in which the external enclosures are converters of solar energy to thermal. Therefore, the purpose of the publication was the scientific substantiation and development of the solar heating system with the use of rooftop solar panels. Graphical and analytical dependences of the coefficient of thermal efficiency of the solar panel in heat supply system from the angles of solar radiation incoming and the density of the radiation flux were obtained. Analysis of the results showed that the coefficient of thermal efficiency of the solar panel without transparent coating with the placement of pipelines of the circulation circuit of the coolant over the heat absorber increases by 50%.
In this paper the method of reducing production and technological losses of natural gas in engineering systems of gas supply is considered. The reduction of the production and technological losses occurs at the gas distribution station when the natural gas heater is replaced by the vortex pipe. The heating of natural gas at the gas distribution stations is carried out to eliminate the icing of the gas pressure regulators during the throttling process. The main factors that influence the heating degree of gas in the vortex tube are determined. A study was conducted to determine the optimal dimensions of the vortex tube. It has been established that the presence of a vortex tube at gas distribution stations with a throughput of up to 2500 m3/hour can reduce the production and technological losses of natural gas in engineering systems of gas supply.
Abstract
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.
