Feasibility study of solar flat collectors using thermal energy storage
Energy storage during a phase change material (PCM) is fascinating because of its high energy storage capability and its isothermal behaviour during the process. A flat solar collector system using PCM is theoretically investigated and the obtained results are compared with an experimental study. Paraffin wax RT 65 is used as the PCM in thermal energy storage (TES) systems. The considered system is also designed for using the stored energy inside the tank which contains PCM material, by circulating water through it after sunset. Because of indirect exposure of the PCM content to the sun, rise in water temperature is more considerable in comparison to the system with directly exposed PCM. In other words, this arrangement gains more thermal energy from the sun.
In this paper, by means of data mining techniques, a platform of data warehouse is designed after preprocessing the huge amounts original data of power system, and a system for short term load forecasting (STLF) is developed, in which there is the synthetic technology of both fuzzy clustering and robust regression model in the platform. The useful data excavated from large amounts of data can offer the effective and accurate load forecasting information for reliable and economic operation of power systems. The validity of the designed system for STLF is shown by the simulation results of an actual power system in China.