太阳能油储维温系统动态能流分析

Dynamic energy transport analysis of crude oil heating system with solar energy

提高浮顶油罐内原油加热维温太阳能光热利用率为降低常规能源消耗及拓宽太阳能应用提供了一种新途径。建立太阳能油储维温系统长周期能流输运模型,分析太阳能油储维温系统能流特性,探索系统能量动态影响机制。结果表明:所建模型的模拟值与试验值的最大均方根误差变异系数和标准平均偏差分别为7.86%和7.29%,模型具备有效性;在真空管集热器、相变蓄热箱及辅助热源联合供热条件下,通过控制器协同调控系统使之实现稳定运行;原油平均温度高于设计温度和相变材料平均温度高于相变温度的时长分别占全年时长的74.9%和50.96%,相变蓄热箱和真空管集热器最大供热量占比分别为34.16%和67.07%。

Improving the solar energy utilization for heating crude oil in the floating roof oil tank provides a new way to reduce the energy consumption and broaden the application of solar energy. A long-term energy transport model of crude oil heating system with solar energy was established, and the energy transport and the dynamic mechanism of the system were explored. The results show that the maximum cumulative root mean square error and the standard mean bias error between the simulated and experimental values are 7.86% and 7.29%, respectively, which indicates that the model is effective. Under the condition of combined heating of evacuated tube solar collector, phase change heat storage tank and auxiliary heat source, the system can achieve a stable operation by means of the controller. The average temperature of crude oil higher than the design temperature and the average temperature of the phase change material higher than the phase transition temperature account for 74.9% and 50.96% of the whole year, respectively. The maximum heat supply proportion of the phase change heat storage tank and the evacuated tube solar collector account for 34.16% and 67.07%, respectively.