Energy Efficiency Analysis and Energy-Saving Measures for the Steam System in a Cigarette Factory in Zhangjiakou

This paper conducts an energy efficiency assessment of the steam system in a cigarette factory.By analyzing different heat-consuming units, a heat utilization model is established to calculate the thermal efficiency and exergy efficiency of each unit and to identify factors affecting the efficiency of units with low heat utilization.The results indicate that the exergy efficiency of the steam system is only 7.13%, with significant exergy losses.Among these, the exergy efficiency of the production system is 4.20%, followed by the exergy efficiency of the heat source at 34.80%.Based on these findings, an energy-saving retrofit plan utilizing flue gas waste heat to provide hot water is proposed.This approach can improve boiler efficiency by 11.5%, demonstrating effective results.