Performance Evaluation of Energy-Saving Solutions For a Thermal Oil-Based Drying System with a Capacity of 1000 Kg/Batch

Energy losses in sliced fruit-drying systems employing thermal-oil heaters constitute a critical technical challenge, with measurable impacts on both operational efficiency and environmental performance. This study provides a quantitative assessment of three principal mitigation strategies: 1. Recovery of waste heat from flue gas via installation of an air preheater (APH); 2. Enhancement of insulation and thermal protection; 3.Optimization of the combustion process. When these feasible measures (Solutions 1, 2, and 3) are implemented concurrently, the overall thermal efficiency of the heater can be improved from 87.84% to 95.27%. Building on these results, This study investigates outlines an integrated implementation pathway aimed at maximizing energy utilization efficiency and strengthening the economic performance of fruit-drying operations.