Sevastopol State University has Learned to Get More Wind and Solar Energy
Scientists led by Boris Yakimovich at the Department of Renewable Energy and Electrical Systems and Networks were able to increase the capacity of the combined wind-solar power installation owned by Sevastopol State University by 40%.
The installation was given to the University by SEC ‘Solar Energy’ LLC. The design is a tower of a vertical-axis wind generator 5.5 meters high, combined with a 3-square-meter solar panel. It is currently installed in the summer student camp ‘Gorizont’ and provides its external lighting.
“We created a ‘digital double’ of this installation - a model that allowed us to calculate the energy efficiency at different angles of attack of the blades, the use of rotors with different geometries and determine the ratio of which parameters will achieve the highest power generation. We transferred the data obtained as a result of digital modeling to a physical model and increased its power by 40%, ”said Pavel Kuznetsov, a Docent and the head of the practical part of the project at the Department of Renewable Energy and Electrical Systems and Networks.
According to him, companies producing and designing wind and solar power plants, have become interested in the results of the study.
“We found the effect that during the operation of the wind generator, due to the rotation of the blades, additional convective heat transfer occurs: the solar panels are cooled. This further increases their effectiveness. A positive synergistic effect appears. We investigated this process, and it showed interesting results”, he said.
As explained by Kuznetsov, one of the problems that hinders the active introduction of renewable energy is the intermittent generation of electrical energy.
“By combining two different in nature sources of energy in one installation, we were able to somewhat overcome this problem. There is a weak correlation between solar activity and wind. For example, strong winds blow in winter, and solar potential is low. In summer, the opposite is true. The same thing - day and night, ”said Kuznetsov.
Within the framework of the project, a special controller was also developed, that made it possible to increase the energy efficiency of the installation by another 6% by using the technology of matching solar panels and a generator patented by the authors. In addition, the use of the controller allowed to reduce the total cost of the combined installation by 5%.
The wind-solar power plant generates 7 megawatt-hours per year. This energy can provide the need for two apartments with all household appliances.
“Such installations can be used in camps, camp sites, on the infrastructure of the smart city, that must be provided with electricity without interfering with the existing energy system and ecosystem of the city,” says Kuznetsov.