摘要
介绍了相变储能材料和空气隔热技术结合应用在室外光伏逆变器场景的模拟研究,提出了一种通过控制空气层厚度来优化相变储能材料充放能过程的动态隔热策略。采用多物理场耦合软件COMSOL Multiphysics对室外光伏逆变器进行模拟,通过分析不同隔热策略下逆变器受光照面元器件的升温状况对比各策略优劣。仿真结果表明,相变储能材料与空气隔热层结合可以有效减缓前者的融化速率,是一种理想的控制太阳辐射物体温度稳定的方案。提出的可调式隔热策略,在较低发热功率的情况下可取得不错的效果,但在环境温度较低或自发热功率过高的场景并无显著收益,其不同应用场景下的具体策略仍需进一步优化。
Combining phase change material(PCM)and air insulation layer for preventing high temperature rise of essential electronics in outdoor photovoltaic inverters during daytime,a dynamic heat insulation strategy by controlling the thickness of air layer and optimizing the charging and discharging process of PCMs is proposed.Simulations on outdoor inverter were conducted by using COMSOL Multiphysics software,and the different temperature rise process of inverter under different insulation strategies,with or without the proposed air insulation system,were compared.Simulation results show that the combination of PCM and air insulation is effective to slow down the PCM melting rate and maintain temperature stability of the inverter exposed to direct sunlight illumination.Results indicated that the proposed adjustable insulation strategy achieves good results on low power inverter.However,there are no obvious good results under the circumstances of low ambient temperature or higher power inverter.The strategy should be further optimized under the specific application circumstances.
作者
龚佳康
郑梦莲
赵俊雄
GONG Jia-kang;ZHENG Meng-lian;ZHAO Jun-xiong(College of Energy Engineering,Zhejiang University,Hangzhou 310029,Zhejiang,China)
出处
《能源工程》
2020年第4期35-41,54,共8页
Energy Engineering
