混合式制冷制热系统控制方法研究

Novel control for hybrid refrigeration and heating system

混合式制冷制热系统的控制难点在于如何合理切换冷热源。采用改进的DBN网络进行短期、中期和长期冷热负荷预测,并通过实测数据验证了模型的准确性。在负荷预测的基础上采用健康评估技术,对地源热泵的短期、中期和长期健康状态进行评估,并根据评估结果进行相应控制,从而实现长期稳定高效运行。最后,对比了两种不同控制方法的运行情况,采用新控制方法后,主机性能系数提高8.5%。结论验证,基于健康评估技术的控制方法有利于混合式系统的高效运行。

The difficulty of hybrid refrigeration and heating system is how to switch the cold and heat source reasonably.An improved DBN network is used to predict short-term,medium-term and long-term cooling and heating loads,and the accuracy of the model is verified by experimental data.On the basis of load prediction,health assessment technology is used to evaluate the shortterm,medium-term and long-term health status of ground source heat pump,and corresponding control is carried out according to the assessment results,so as to achieve long-term stable and efficient operation.Finally,the performance of the two different control methods is compared,and the coefficient of performance of the host is improved by 8.5%after adopting the new control method.In conclusion,the control method based on health assessment technology is beneficial to the efficient operation of hybrid system.