Energies, Vol. 18, Pages 5550: Research on Energy-Saving Optimization of Mushroom Growing Control Room Based on Neural Network Model Predictive Control

Energies, Vol. 18, Pages 5550: Research on Energy-Saving Optimization of Mushroom Growing Control Room Based on Neural Network Model Predictive Control

Energies doi: 10.3390/en18205550

Authors:
Yifan Song
Wengang Zheng
Guoqiang Guo
Mingfei Wang
Changshou Luo
Cheng Chen
Zuolin Li

In the heating, ventilation, and air conditioning (HVAC) systems of mushroom growing control rooms, traditional rule-based control methods are commonly adopted. However, these methods are characterized by response delays, leading to underutilization of energy-saving potential and energy costs that constitute a disproportionately high share of overall production costs. Therefore, minimizing the running time of the air conditioning system is crucial while maintaining the optimal growing environment for mushrooms. To address the aforementioned issues, this paper proposed a sensor optimization method based on the combination of principal component analysis (PCA) and information entropy. Furthermore, model predictive control (MPC) was implemented using a gated recurrent unit (GRU) neural network with an attention mechanism (GRU-Attention) as the prediction model to optimize the air conditioning system. First, a method combining PCA and information entropy was proposed to select the three most representative sensors from the 16 sensors in the mushroom room, thus eliminating redundant information and correlations. Then, a temperature prediction model based on GRU-Attention was adopted, with its hyperparameters optimized using the Optuna framework. Finally, an improved crayfish optimization algorithm (ICOA) was proposed as an optimizer for MPC. Its objective was to solve the control sequence with high accuracy and low energy consumption. The average energy consumption was reduced by approximately 11.2%, achieving a more stable temperature control effect.