# Improving Energy Efficiency of Grain Cleaning Technology
## 5 Conclusions  
1. The conducted experimental and theoretical studies of the technological processes of post-harvest grain treatment on grain cleaning units showed that the energy consumption of the grain cleaning process is the most informative indicator for determining energy saving operating modes of electromechanical systems of grain storage facilities. 2. By analysing a priori information, the following were selected as the most significant factors influencing the power capacity of the grain cleaning process: the processing equipment productivity, the connected capacity, and the load factor of the electric power equipment. 3. For the first time, the methodology for the optimization of specific electricity consumption on the ZAV-40 grain cleaning unit on production lines using the MEP was developed, the essence of which lies in the application of the MEP theory to the mathematical model of the specified object of study. 4. Two-dimensional cross-sections of the response surface of the target function, which were obtained after processing the mathematical model of the ZAV-40 unit, allowed for determination of the optimal factors and rational levels of their variation. It was determined that the minimum specific electricity consumption for the unit in general occurs if the values of the factors most affecting the specific electricity consumption are as follows: \(Q=40\) t/h; \(p=25\) kW; \(K_{l}=0.583\); \(W_{sp. }=0.894\) kW\(\cdot\)h/t. 5. The recommended scientifically based electricity consumption standards for various technological schemes of wheat grain cleaning on ZAV-40 production lines are as follows: * one production line with disc separators: \(W_{sp. }=1.347\) kW\(\cdot\)h/t; * one production line without disc separators: \(W_{sp. }=0.902\) kW\(\cdot\)h/t; * two production lines with disc separators: \(W_{sp. }=1.342\) kW\(\cdot\)h/t; * two production lines without disc separators: \(W_{sp. }=0.901\) kW\(\cdot\)h/t. 6. The suggested optimization method for specific electricity consumption can be used while developing scientifically based standards of electricity consumption for new grain-cleaning units produced by industry. Conceptualization, M.P. and O.B. ; Methodology, M.P. and V.N. ; Project Administration, O.B. and S.H. ; Validation, O.M., O.K. and E.M.; Investigation, M.P. and O.M. ; Data Curation, S.H. and O.K. ; Writing--Original Draft Preparation, O.B., M.P. and V.N. ; Writing--Review and Editing, O.S., S.H. and E.M.; Visualization, O.B. and V.N. ; Supervision, O.B. and V.N. ; Funding Acquisition, O.B. All authors have read and agreed to the published version of the manuscript. This study was carried out as part of the project \"Belt and Road Initiative Institute for Chinese-European studies\" and was funded by the Guangdong University of Petrochemical Technology. Informed Consent Statement: Informed consent was obtained from all subjects involved in the study. Data Availability Statement: Data are contained within the article. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Technological Schemes** & **Capacity, t/h** & \
\begin{tabular}{c} **Calculated** \\ \(W_{sp.}\), kW\(\cdot\)h/t** \\ \end{tabular} &
\begin{tabular}{c} **Recommended** \\ **Norms, kW\(\cdot\)h/t** \\ \end{tabular} \\ \hline One production line with disc separators & 15.0 & 1.274 & 1.347 \\ One production line without disc separators & 20.0 & 0.805 & 0.902 \\ Two production lines with disc separators & 30.0 & 1.271 & 1.342 \\ Two production lines without disc separators & 40.0 & 0.805 & 0.901 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Recommended scientifically based norms of electricity consumption when cleaning grain on the production lines of the ZAV-40 grain cleaning unit. **Acknowledgments:** The authors are grateful to Guangdong University of Petrochemical Technology for supporting and donating to this research. **Conflicts of Interest:** The authors declare no conflict of interest.