Performance Study of Closed-Loop Heat Pump Drying System Based on Air Heat Recuperation
LIANG Kunfeng
ZHAO Yichen
CHEN Haoyuan
GAO Chunyan
FENG Ye
AN Jiawang
Abstract：A closed-loop heat pump drying system based on air heat recuperation was designed to enhance drying performance.To optimize system efficiency,adjustable parameters during the drying process were investigated.Multiple experiments were conducted to analyze the effects of bypass ratio,drying chamber temperature,and circulating airflow velocity on the recuperation system,and performance comparisons were made with a non-recuperative system.The experimental results indicate that each of these three factors,including bypass ratio,drying chamber temperature,and circulating airflow velocity,has an optimal value.The recuperation system improved the specific moisture extraction rate(SMER)by 5.57％～37.40％,depending on the conditions.Compare with the non-recuperative system,the optimized recuperation system achieve an SMER enhancement of 7.71％～22.78％.
Keywords：closed-loop heat pump dryingSMERheat recuperationbypass ratio
Publication Date：2025-08-25
Online Publishing Date：2025-09-16(First online date of this platform, not the publication date of the document)
Pages：7( 17-23 )