基于CFD的LED补光灯模型构建与验证

为明确植物工厂CFD环境模拟中LED补光灯的边界条件设置,构建单层LED补光栽培架(原型),并根据原型在CFD软件中建立规格一致的栽培架三维模型,对三维模型进行模拟分析,将得到的模拟值与原型实测值进行对比分析,验证LED灯边界条件设置的可行性.在模型中将LED补光灯分为反应器和灯罩两部分,反应器为LED补光灯的灯板,设...

Simulation and verification of LED lamp model based on CFD

In order to identify boundary condition of LED light in CFD environment simulation of plant factory, a single-layer production system was constructed. According to the prototype, a 3D model of the cultivation frame with the same size was built in CFD software. The 3D model was simulated and analyzed, and the simulated value was compared with the measured value of the prototype, which verified the feasibility of setting LED lamp boundary conditions. In the model, the LED lamp was divided into reactor and lampshade. The reactor was set as the boundary condition of heat source. Based on the numbers of red and blue bulbs and the corresponding electro-optical conversion efficiency, the heat dissipation per unit volume was calculated. The lamp shade is a plastic shell on the surface of the LED lamp, which was set as a heat conduction material. The measured values of airflow speed and temperature on the cultivation system were compared with the simulated values. The feasibility of setting LED lamp reactor as heat source and lamp shade as heat conduction material in CFD model was verified. The results showed that: 1)The heat dissipation per unit volume of LED lamp in the three-dimensional model of cultivation system was 34 166 W/m³; 2)The root-mean-square error of the measured and simulated wind speed values at 30 measurement points is 0. 06 and the root-mean-square error of the measured and simulated temperature value at 46 measurement points is 2. 63. In conclusion, it is feasible to set LED supplementary light reactor as heat source and lamp shade as heat conduction material in CFD simulation of plant factory.