## 6 Practical Application of Research Results  
Based on the conducted theoretical and experimental studies of solar heat-supply system with solar panels, it is possible to draw conclusions about the possibility of applying the investigated circuit solution. Solar panels allow users to receive solar energy throughout the day and accumulate more of it, as they are inertial. The sectional storage tank will make it possible to reheat the coolant without significant transfer of the accumulated heat back to the solar panel. Night thermal storage at a preferential rate will allow an increase in the efficiency of the system as a whole since unused thermal energy may remain in the storage tank. As a result of the studies conducted on solar panels, it is possible to draw conclusions about their effectiveness and the possibilities of wide application in solar heat-supply systems. Schematic solutions with solar panels are simple and cheap to implement, which is a prerequisite for their wide application.  
The system proposed for solar heat supply (Figure 11) consists of solar panels, shut-off and regulating valves, a sectional storage tank with heat exchangers, a tubular electric heater (TEH), and a heat-generating unit (HGU).  
The thermal energy received from the solar panels is accumulated in the storage tank, where it can be reheated by TEH or heat from the HGU, if necessary. If (on sunny summer days) the heat accumulated during the day is not fully used, then due to nighttime electrothermal accumulation, the heat-carrying medium is reheated and used in the morning.  
It is possible to combine the solar heat-supply system with solar panels and thermal storage with passive solar heat supply systems (SHSSs). This SHS system can also be used in a heat-supply system with a passive SHS system and a heat pump.  
Solar panels can be used both in new construction and in the reconstruction of roofs. If the building has a rooftop boiler room, the solar panels are connected to the heat-supply system through the main storage tank, which is connected to an additional storage tank, heated using a heat-generating unit.  
The solar heat-supply system using solar panels is shown in Figure 12.  
In the above diagram, cold water is supplied through the pipeline (2) to the solar panel (1), where it is heated by solar energy. When the water distribution devices (shower (5) or sink (4)) are turned on, hot water is supplied to the consumer, and cold water is supplied from the network (2) in its place.  
The developed and researched solar panels can be used for solar heating of buildings, in particular residential buildings.  
Figure 11: Combined system of solar heat supply with solar panels: 1—solar panel; 2—the main tank accumulator; 3—additional tank accumulator; 4—heat exchanger of the heat-supply system; 5—heat exchanger from HGU; 6—TEH; 7,13—pipelines; 8—circulation pump; 9—thermostatic valve; 10,11—pipelines connecting accumulator tanks; 12—hydraulic collector; 14—heat-carrying medium drain nozzle; 15—heat-carrying medium supply pipe; 16—heat-carrying medium selection nozzle; 17—additional heat source (HGU).  
Figure 12: Scheme of the solar hot water supply system with solar panels for the summer shower of the holiday home: 1—solar panel; 2—cold water supply; 3—supply of heated water; 4—wash basin; 5—shower cabin.  
In the diagram shown in Figure 13, cold water is supplied to the solar panel and is preheated in the attic due to a heat exchanger (4); then, after heating, it is supplied to the consumer (10). If necessary, the water can be reheated in the intermediate tank (2) from electricity or from the energy of the HGU.  
A combined heating system with solar panels was implemented in a residential building in Lviv city (Ukraine). The implemented method makes it possible to provide the necessary parameters of the heat-carrying medium for the heat-supply system and improves the microclimate of the premises of a residential building. The economic effect of its implementation is 268.1 EUR/year.