| Popis: |
A unique and novel steam power station has been built using a concentrated solar dish, to generate electricity. The system was built based on recommendations by previous researchers about the possibility of obtaining high temperatures using a solar dish. The steam generated will be used to operate a mini steam station, after making some simple changes to fit the new working mechanism, while retaining the main working principles of large steam power stations. This was achieved by using the main elements found in a Rankine cycle system for steam power plant stations (turbine, generator, condenser and pump) and by adding auxiliary secondary components to facilitate its protection and operation all year round. A small station consisting of a solar dish (solar heater), works as a boiler connected to a turbine, this linked to an electric generator. Outlet working fluid travels to the condenser and is then recycled back to the solar heater by a pump. A prototype of the solar dish was built of diameter 3 m, an aperture area reaching 7.1 m2, and focal length 1.41 m, covered with 2 mm glass/ silver mirrors. Data was gathered in situ in summer and winter, to test its performance under different weather conditions and changes in the amount of solar radiation, temperature and wind speed. The results show that the station was able to generate good quantities of energy, ranging from between 900–2000 W, working at 31%–34% overall efficiency. A statistical analysis of the system was also carried out using a SPSS software the results of high accuracy, the maximum value of the coefficient of determination (R2), 85%–91.3%. |
