Heat Recovery Characteristics and Energy Efficiency Analysis of a Heat Pump-Fine Filament Water-Film Sucrose Drying System

Xinlan Tang; Chong Lu; Yunfei Ma; Wenhong Li

doi:10.6919/ICJE.202608_12(8).0005

Authors

Xinlan Tang School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Chong Lu School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Yunfei Ma School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Wenhong Li School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China

DOI:

https://doi.org/10.6919/ICJE.202608_12(8).0005

Keywords:

Heat Pump; Fine-Filament Water Film; Sucrose Drying; Heat Recovery; Energy Efficiency; Sugar Dust Recovery.

Abstract

Given the problems of high energy consumption, poor utilisation of exhaust heat, and low sugar dust recovery efficiency in traditional sucrose hot-air drying, this paper presents a heat pump-coupled fine-filament water-film sucrose drying system and studies its heat recovery characteristics and energy performance. The condenser side of the heat pump in the proposed system supplies drying heat, and the evaporator side provides low-temperature circulating water to maintain a stable liquid film on the fine filaments for integrated drying, exhaust heat recovery and wet sugar dust capture in a unified process. According to the system's structure, this paper outlines the primary heat-transfer paths, the functional purpose of the recovery unit, and an energy-efficiency assessment system; at the same time, it investigates how to modify operating parameters to increase heating capacity and heat-recovery intensity for the entire system. Based on the above analysis, connecting a heat pump with a fine-filament water-film unit can reduce sensible and latent heat loss in the exhaust stream, improve the utilisation of recirculated air, and enhance cascade use of thermal energy in the system. At the same time, a liquid-film interface can increase the efficiency of particle collection and provide a good environment for the re-absorption and redistribution of exhaust heat. Introduce indicators such as the coefficient of performance, specific moisture extraction rate and heat recovery ratio to assess the energy-saving effect and engineering feasibility of the system in an all-around way. Provide the foundation for the following experiments and numerical simulations of low-carbon sucrose drying equipment: experimental verification and engineering optimisation.

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