关键词: 太阳能-空气源热泵, 双热源干燥系统, 动态仿真, 参数优化

Abstract: This study addresses the critical challenges of high energy consumption and unstable solar energy utilization in agricultural product drying in Northwest China. It aims to develop an efficient and stable hybrid drying system to facilitate green and low-carbon processing of high-value crops such as wolfberry. A solar-assisted air source heat pump dual-source drying system was designed and modeled specifically for wolfberry drying in Jinghe County, Xinjiang. A dynamic simulation model was established using the TRNSYS platform, incorporating local meteorological data to analyze system performance under typical operating conditions. A dual-mode operational strategy was implemented, automatically switching between solar-only heating on sunny days and heat pump-assisted heating under cloudy conditions. Key design parameters, including collector area, heat pump heating capacity, and collector tilt angle, were optimized with the annualized system cost as the objective function. The results show that the annual cost of the optimized system is reduced by 9% , the operating energy efficiency ratio is increased to 3.4, the initial investment is reduced by 11% , and the CO2 emission is reduced by 81.3% . This study provides a reliable theoretical basis and a technical scheme with practical value for the green upgrading of agricultural product drying equipment in the high radiation area of northwest China.