一种基于PID控制算法的分布参数法压缩式空气源热泵模型

采用分布参数法建立单、双级压缩式空气源热泵的热力学模型,并且将比例积分微分(proportional-integral-derivative,PID)控制算法应用到模型计算中,形成一种基于PID控制算法的全系统循环分布参数模型。将建立的模型在C++环境中运行,用实验数据验证模型精度。结果表明:模型充分利用了分布参数法和PID控制算法的优点,与传统集总参数法建立的模型相比,模型具有更高的计算精度,其中双级压缩式空气源热泵模型的模拟制热性能系数(COP)与实验数据的平均相对误差为4.91%;加入PID控制算法后,提高了模型的运算速度,双级压缩式空气源热泵模型循环迭代5次就达到了收敛。

A Distributed Parameter Method Compressed Air Source Heat Pump Model Based on PID Control Algorithm

: In this paper, the thermodynamic model of single-stage and two-stage compression air source heat pump is established by distributed parameter method, and the PID control algorithm is applied to the model calculation to form a system-wide cyclic distribution parameter model based on PID control algorithm. The established model is run in a C++ environment and the experimental data is used to verify the accuracy of the model. The comparison between the experimental data and the model simulation results shows that the model makes full use of the advantages of the distributed parameter method and the PID control algorithm. Compared with the model established by the traditional lumped parameter method, the model has higher calculation accuracy . The average relative error between the simulated cop and the experimental data of the model of the two-stage compression air source heat pump is 4.91%. After adding the PID control algorithm, the operation speed of the model is improved, and the cycle of the two-stage compressed air source heat pump model is iterated five times.