Applicable Research Of Solar Photovoltaic Technology On Saving Energy Of Building

With the development of economy, the demand for energy is growing, and coal, oil, natural gas, nuclear energy and other chemical energy are facing exhaustion. As a renewable energy, solar energy has the advantages of easy access, no exhaustion, low-carbon and other characteristics, which can be used in power generation, heating and cooling.Battery is an important part for both grid and independent solar energy generation systems. At present,most of batteries realize storage energy or release through electrochemical reaction mechanism,and over-charging or over-discharging will affect the life of battery. For solar energy generation system, extending battery′life will reduce the system cost. Designing intelligent controller for control battery charging and discharging, choosing low power consumption ATmega16L-8AC as control loop core for controller in the system, ATmega16L-8AC is an enhanced eight CMOS microcontroller with AVR RISC structure and low power consumption, which has the advantage of fast data processing speed, low consumption etc. Under the control of ATmega16L-8AC, the system detects voltage of solar cells and battery respectively, storages and uses converted dc effectively, realizes the automatic control in charging and discharging process. For battery, the system has the function of prevent short circuit and reverse connection, shutting down automatically when full charged and excessive discharged etc. Peripheral circuit has voltage collection circuit,load output control and detection circuit. Intelligent system is equivalent to a voltage collection and battery management module.Generating efficiency is the key problem for solar energy generation technology. Due to technical reason, solar power has no breakthrough. The efficiency is low and cost is high, so the research of efficiency for photovoltaic power generation is great practical significance. The efficiency of solar photovoltaic modules is related with the amount of received high-energy photons. Once the PV module is determined, the power generation efficiency is mostly affected by external conditions such as light and temperature. So this paper focuses on the relationship between incident angle of light and conversion efficiency. Therefore, author researchs the relationship between the angle of incidence of light and power generation efficiency panels. In all the bands of light, the visible light energy that is main using in daily life is stable, so it is looked as the main object of study options, including near-infrared and near ultraviolet.Then paper takes visible light as the research object and the wavelength range is 300-900nm. As for PV modules, an amorphous silicon panel is used in experiment. Choosing the angle between amorphous silicon panel and light is 90°, 80°, 75°, 60°and 45°. PV testing for amorphous silicon panel is conducted by the 7-SCSpec spectrum solar cell performance test systems in laboratory, and the test results show when the temperature is belong to 18-25℃, changes of angle between amorphous silicon panel and light have close relations with photovoltaic energy generation power. When the angle between amorphous silicon panel and light is 80°, the maximum value of PV current is 1.2093nA. This means that the response of the quantum efficiency is the maximum and photovoltaic power generation efficiency is the largest at this time. When the angle of 60°-80°is compared to angle of 90°, photovoltaic energy generation power of the front is larger, which is contradictory with conventional theory that generation power is largest when incident angle is 90°. Basing on the experimental results the paper analyzes causing reason and experimental data has certain reference value for future study.