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利用地埋管换热器线性叠加传热特征,提出一种地埋管换热器的逆向建模方法——G函数插值法。采用约束非线性单纯形法求解反卷积计算,拟合模型参数。G函数插值法不涉及具体的地埋管换热器结构,无需换热器的内部参数,适用于多种地埋管换热器。根据某地源热泵空调系统的实测记录数据,应用G函数插值法和传统的DST调试法分别进行地埋管换热器的逆向建模及预测。结果表明:在实例中两种方法拟合预测结果较好,G函数插值法拟合误差和预测误差均小于DST调试法,日记录数据误差是产生逆向建模拟合预测误差的主要原因。
Using the characteristics of linear superposition heat transfer of buried pipe heat exchanger, a method of reverse modeling of buried pipe heat exchanger - G function interpolation method is proposed. The constrained nonlinear simplex method was used to solve the deconvolution calculation and fit the model parameters. G function interpolation method does not involve a specific buried pipe heat exchanger structure, without the internal parameters of the heat exchanger, suitable for a variety of buried pipe heat exchanger. According to the measured recorded data of a ground source heat pump air conditioning system, the reverse modeling and prediction of the buried tube heat exchanger are respectively carried out by using the G function interpolation method and the traditional DST debugging method. The results show that the fitting results of the two methods are good in the example, the fitting error and the prediction error of the G function interpolation method are both less than the DST method, and the error of the daily record data is the main reason of the inverse model fitting prediction error.