太阳能主动采暖室内热环境数值仿真

Numerical Simulation of Indoor Thermal Environment for Active Solar Heating

太阳能主动采暖室热环境数值模拟是当前太阳能取暖技术的核心,传统数值模拟方法因为规避环境流场多边性影响而存在模拟延时。为此提出了一种新型太阳能主动采暖室热环境数值模拟技术。根据假设情景明确室内环境中热能气固耦合过程,并引入质量守恒、动量守恒和能量守恒关系,获取气相、颗粒相焓值及二者传递关系;对衍生出的离散相进行轨道模拟,确立当前室内流体整体信息参数;通过当前温室热负荷波动性以及与周围固有负荷的动向波动冲突,计算当前室内热负荷。利用Matlab进行数据模拟编程,引入模拟外温环境数据,通过对比不同墙体热负荷波动来获取最佳墙体比例,带入模拟关系式,得到最终的模拟数值。仿真结果表明应用该数值模拟技术后,室内气流项换算比例提高34%,外温焓值计算延时降低22%,能够有效降低环境数值模拟延时。

At present,the core of solar heating technology is numerical simulation of indoor thermal environment in solar active heating,but the traditional numerical simulation method has simulation delay.Therefore,a new numerical simulation technique for indoor thermal environment of solar active heating was put forward.According to the hypothetical scenario,the gas-solid coupling process of thermal energy in indoor environment was determined,and the relationship of mass conservation,momentum conservation and energy conservation was introduced to obtain the enthalpy value of gas phase and particulate phase and their transitive property.The trajectory of derived discrete phase was simulated to determine the overall information parameters of indoor fluid.Then,the indoor heat load was calculated by the fluctuation of current greenhouse heat load and the conflict with the fluctuation trend of inherent load.In addition,Matlab was adopted for data simulation programming,and the simulated data of external temperature environment were introduced.The optimal wall proportion was obtained by comparing different wall thermal load fluctuations,and then it was put into simulation relational expression relation to calculate the final simulation value.Simulation results show that,after the application of numerical simulation technology,the time delay can be reduced.The conversion ratio of indoor airflow items is increased by 34%,and the computing delay of external temperature enthalpy is decreased by 22%.