【摘要】 由于太阳能是一种间歇资源,因此在塔式太阳能热电系统中对吸热功率进行实时估计对于整个系统的运行优化具有重要的意义。在此建立了镜场物理模型和能量转换模型,分析了镜场光学效率的各组成部分,根据太阳光锥角和太阳圆盘生成非平行入射光。提出了一种基于GPU的吸热功率的快速计算方法,借助GPU的双层并行结构,利用蒙特卡洛光线追迹法多线程高效率地依次判断每根光线的运动轨迹;过程中计算镜场光学效率,最终快速准确地得到吸热器的吸热功率。通过一个基于e Solar的模拟镜场与一个实际镜场的仿真结果分别验证了方法的实时性和有效性。更多还原

【Abstract】 Since the solar energy is intermittent and unstable, it’s important to estimate the heat power in the solar tower power plant for the optimization of the whole system. The physical model of the heliostat field and the energy conversion model are built to analyze the components of the optical efficiency. Non-parallel incident rays are generated according to the divergence of the sunlight and the solar disk. A new fast calculation method for heat power is presented based on GPU. By exploiting the Single Instruction Multiple Data(SIMD) architecture of GPU, the Monte Carlo ray tracing method is utilized to track the movement of each ray. With the optical efficiency of the heliostat field being calculated, the heat power on the receiver can be obtained with high speed and high precision in the ray tracing procedure. The rapidity and effectiveness of the proposed method is demonstrated by the simulation results of a simulated heliostat field similar to e Solar plant and a real heliostat field.更多还原