储能科学与技术2025，Vol.14Issue(2)：505-514,10.DOI:10.19799/j.cnki.2095-4239.2024.0814
基于相变蓄冷的风冷蒸发器供冷性能研究
Cooling performance of air-cooled evaporator based on phase-change cold storage
摘要
Abstract
Frequent opening and closing of the refrigerator results in energy consumption problems owing to the large temperature difference within and outside a refrigerator during cold-chain transportation.Latent heat characteristics of phase-change materials for cold energy storage are a reliable and effective solution for the aforementioned challenge.In this study,we describe the construction of a new type of evaporator with half of the coil tube filled with cold-storage phase-change material.The evaporator stores part of the cooling capacity of the phase-change material as the refrigeration unit actively cools and continues to release this part of the cooling capacity after shutdown.By changing the position of the cold-storage coil,we studied the cooling times,heat-transfer change,and entransy dissipation of the built-in and new external evaporators.The results show that the cold storage capacity of the two phase-change coils is 285 kJ,and the cooling release time of the built-in and external storage evaporators are 6.2 min and 7.3 min,respectively,compared to the non-cold-storage evaporator.Based on the actual transportation time and the demand for transporting goods,during long-distance operations with durations of approximately 10 h and a refrigeration temperature range of 10-15℃,the conventional evaporator needs to undergo 12 start-stop cycles.In contrast,the built-in and external new evaporators undergo 9.79 and 9.87 start-stop cycles,respectively,with an approximate reduction by 2.2 start-stop cycles,effectively reducing the number of start-stop energy consumption of the system.The total energy consumption under the built-in cold storage form is reduced by about 0.25 kWh,accounting for 1.6%of the total energy consumption.The entransy dissipation increases for the external and built-in evaporators are over 400 J·K and approximately 100 J·K,respectively,compared to the evaporator without cold storage.Overall,the built-in cold storage evaporator exhibits a better energy-saving effect.关键词
蒸发器/相变换热器/冷链运输/相变储冷/耗散Key words
evaporator/phase change materials/cold chain transportation/refrigeration/entransy dissipation分类
通用工业技术引用本文复制引用
刘艺炫,任晓芬,童山虎,石志国,折晓会..基于相变蓄冷的风冷蒸发器供冷性能研究[J].储能科学与技术,2025,14(2):505-514,10.基金项目
石家庄市重大科技专项(241260497A). （241260497A）
