光伏热电通风系统多场建模及其参数特性分析

Modeling and Parametric Analysis of Photovoltaic Thermoelectric Ventilation System

光伏热电通风系统是一种结合光伏发电和温差发电的新型通风系统,具备高效利用太阳能并直接转化为电能的能力,其发电性能与温度直接联系。以往的研究集中在光伏热电发电系统的性能分析,缺乏对光伏热电通风系统的多场建模和性能分析。建立光伏热电通风系统的传热模型,探究光伏热电通风系统在不同聚光下太阳辐照强度(简称聚光辐照强度)CG,以及不同通风速率条件下系统的温度分布和发电性能,分析各影响因素对系统发电性能的作用机制。基于以上分析,确定系统更优的聚光辐照强度和通风速率。结果表明,当聚光辐照强度从100 W/m^(2)增大至3000 W/m^(2)时,系统总输出功率从0.01099 W增大至0.26353 W,当通风速率从0.25 m/s增大至4.5 m/s时,系统总输出功率从0.24188 W提升至0.28455 W。相关研究对光伏热电通风系统多物理场建模提供有价值的理论依据和技术支撑。

Photovoltaic thermoelectric ventilation system is a new ventilation system combining photovoltaic and thermoelectric generator.It can efficiently utilize solar energy and directly convert it into electric energy.Its power generation performance is directly related to temperature.Previous studies focused on the performance analysis of photovoltaic thermoelectric power generation system,and lacked multi-field modeling and performance analysis of photovoltaic thermoelectric ventilation system.The heat transfer model of photovoltaic thermoelectric ventilation system is established,exploring the temperature distribution and power generation of photovoltaic thermoelectric ventilation system with the solar irradiation intensity under different condensing conditions(hereinafter referred to as condensing irradiation intensity)CG and different ventilation rate,and analyzing the action mechanism of various influencing factors on the power generation performance of the system.Based on the above analysis,the better concentrated irradiation intensity and ventilation rate of the system are determined.The results show that when the concentrated irradiation intensity increases from 100 W/m^(2) to 3000 W/m^(2),the total output power of the system increases from 0.01099 W to 0.26353 W.The ventilation rate increased from 0.25 m/s to 4.5 m/s,and the total output power of the system increased from 0.24188 W to 0.28455 W.This study will provide valuable theoretical basis and technical support for multi physical field modeling of photovoltaic thermoelectric ventilation system.