Abstract. The advent of unique technologies of the developing Solar Energy (SE), actual energy, faces economic and environmental problems. The main obstacle to the widespread use of SE is the low value of the average annual e ciency of known solar installations. In a sharply continental climate, they are exploited only in the warm season, about 6-7 months. Known combined systems, where additional conventional water heaters duplicate the operation of solar units, require additional costs for energy carriers. These disadvantages are not o ered by the integrated system of SE use. In the article, the system was studied using the example of a cattle-breeding farm. The new system performs these functions; it recycles heat, organizes their movement and accumulation, and smooths out the uneven SE. The main components of the system are: Solar Power Plant (SPP), milk cooler, climate unit, Heat Pump (HP), the battery heat, automatic control system, and device heating and hot water. The main goal, i.e. lower cost of the energy produced and the elimination of the uneven SE, compared to the known SPP, is achieved through the ow of energy from the sources mentioned above.

<p><span lang="EN-US">This paper calculates the temperature in an automated solar heat supply system. The study used an automatic controller to monitor the temperature data of the entire system. The developed solar heat supply system has a flat solar collector, heat-insulating translucent glass, and double glazing with reduced pressure. The coolant is made of thin-walled corrugated stainless pipe. The heat from the solar flow heats the liquid removed from the collector, and cold water from the siphon enters its place. There is a constant circulation of heat, which increases heat transfer efficiency by eliminating additional partitions between the panel and thermal insulation. The controller has sensors that register using field-programmable gate array (FPGA) STM32, designed to monitor the entire solar system, and the actuators include power relays. During the experiment, it was found that temperature sensors save energy by 2% due to the use of power relays, which has a significant impact on the service life of the equipment.</span></p>

In the given work there is shown the methodology of simulating the experimental model of solar water heating unit. Using theoretical and experimental outcomes, also, obtained rated values of transmittance medium in solar collector, there has been carried out predictive analysis of solar irradiation flow density, ambient temperature and temperature in the accumulator tank. Estimated and experimental daily characteristics of both systems have efficient accuracy of 7%, which proves reliability of constructive formulae and engineering model. As well, there has been computed the unit capacity factor, plants’ production growth constitutes from 0.5 to 0.85%. Computed the coefficient, which depends on heat flow and solar collector’s surface, as well on convective heat exchange between solar irradiation and solar collector’s surface. Experimentally executed computation of solar water heating unit’s performance, which is fulfilled in compliance with hourly sums of direct and scattered irradiation and ambient temperature

An article describes the development and practical application of control unit of the solar plant, located in Almaty city (Kazakhstan). Such system envisages using an electrical pump for circulation in the transfer medium, connecting a flat plate solar collector with a tank. There has been developed a controller for solar system management, able to control the solar thermal system’s current temperature. With the aim thereof in the proposed system the measurements are carried out from 6 digitizers (DS18B20 Dallas), using 16 wires. Using Dallas sensors and corresponding software it is possible to control the temperature level and heat amount. Usage of 4 digital sensors substantially increase the system control performance and raises data processing speed. There have been considered the possibilities of the configuration of the senstors for Arduino platforms, as well, the solar collector management scheme. This paper scientifically analyzes the work of the new controller for controlling the solar thermal system using 6 digital temperature sensors using the Arduino platform to determine the control of the entire solar thermal system.