摘要
为探究市场通用瓦楞纸箱的开孔方式对层装蜜桃预冷性能的综合影响,确定预冷环境参数与预冷性能间的函数关系以及不同工况条件下最佳的开孔包装,实现果实采后快速节能预冷,本研究基于计算流体力学构建了圆形开孔(circular vent,CV)和矩形开孔(rectangle vent,RV)的热质传递差压预冷数值模型。通过对比分析实验与模拟数据,得知两者间的最大均方根误差为0.799℃,平均绝对百分比误差为6.6%,这充分验证了该数值模型具有较高的预测精准度。通过探讨不同开孔方式下箱内温度与流场分布情况,发现CV的预冷均匀性差于RV,但其预冷时间和风机能耗却分别减少了30%~40%和50%,且与差压呈幂函数关系。由此可知,在选择包装箱时,若更注重预冷品质,应选择RV;若要节约预冷成本,应选择CV。若两者都要兼顾,则需CV直径大于35 mm。该研究为中小型果园合理选择包装箱开孔方式以及精准监控果实预冷性能提供了理论参考依据。
The objective of this study was to explore the effect of the vent mode of corrugated boxes universally used in the market on the precooling performance of layered peaches and to determine the functional relationship between the precooling environmental parameters and the precooling efficiency and the optimal vent mode under different differential pressure pre-cooling working conditions in order to realize the rapid energy-saving precooling of peaches after harvest.A numerical model of heat and mass transfer during differential pressure precooling with circular and rectangular vents(abbreviated as CV and RV,respectively)was established based on computational fluid dynamics.By comparing and analyzing the experimental and simulated data,it was found that the maximum root mean square error and mean absolute percentage error between the two vent designs were 0.799℃ and 6.6%,respectively,which fully verified that this numerical model had high prediction accuracy.Through in-depth exploration of the temperature andflowfield distribution in different vent modes,it was found that CV exhibited inferior precooling uniformity when compared with RV.Nevertheless,CV demonstrated a notable reduction in precooling time by 30%–40% and a decrease in fan energy consumption by 50%.Additionally,their relationships with differential pressure were described by.Based on these obtained results,the precooling quality of peaches could be improved by using RV,and the precooling cost could be reduced by using CV.To simultaneously achieve these two goals,the diameter of CV should be greater than 35 mm.This study provides a theoretical reference for the reasonable selection of vent parameters and accurate monitoring of fruit precooling performance in small and medium-sized orchards.
作者
谌英敏
赵璐茜
令狐博祥
宋海燕
CHEN Yingmin;ZHAO Luxi;LINGHU Boxiang;SONG Haiyan(College of Agricultural Engineering,Shanxi Agricultural University,Taigu 030801,China;Dryland Farm Machinery Key Technology and Equipment Key Laboratory of Shanxi Province,Taigu 030801,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2024年第3期150-158,共9页
Food Science
基金
山西省基础研究计划:青年科学研究项目(202203021212435)
山西省重点研发项目(202102140601015-5-3)
山西省优秀博士来晋奖励项目(SXBYKY2022027)
山西农业大学博士科研启动项目(2021BQ86)。
关键词
蜜桃
差压预冷
开孔方式
预冷性能
数值模拟
计算流体力学
peach
differential pressure precooling
vent mode
precooling performance
numerical simulation
computationalfluid dynamics