the article considers the possibility of increasing the efficiency of the solar collector by improving its heat exchange panel, which is implemented by optimizing the heat exchange processes using the concept of combining the thermal properties of different metals. The positive aspects of this method are described. A brief description of the comparative analysis is given

Keywords: heat exchange panel, energy saving, solar installation, alternative energy sources, thermal properties, heat transfer optimization, solar collector, heat exchange intensification

the article presents the ways of implementation of the strategy focused on the optimization of the process of heat transfer of solar installations, with the applied in their device combined heat exchange panel of aluminum profile elements tightly crimping copper tubes with coolant. Based on the comparative analysis of the two configurations of this device, the methods of heat transfer intensification from the absorbing surface to the working medium in flat-type solar collectors are proposed

Keywords: energy saving, efficiency, optimization, heat transfer, heat capacity, heat exchange panel, heat exchange, solar installation, solar collector, alternative energy sources

This article describes the definition of the approximating function of deflections of building structures using the method of least squares.

Keywords: the approximation function, the least squares method, the deflections of structures, prediction of deformations, the deformation of the structures