二次冷凝融霜冷库预冷荔枝的降温特性研究  

Study on Cooling Characteristics of Pre-cooled Litchi in Cold Storage with Secondary Condensation and Defrosting

作　　者：刘琼瑜 肖波 吴耀森 涂桢楷 丘文杰 马道宽 龚丽 LIU Qiong-yu;XIAO Bo;WU Yao-sen;TU Zhen-kai;QIU Wen-jie;MA Dao-kuan;GONG Li(Guangdong Hongke Agricultural Machinery Research Institute Co.,Ltd.,Guangzhou 510555,China;Guangdong Agricultural Machinery Research Institute,Guangzhou 510630,China;Key Laboratory of Modern Agricultural Intelligent Equipment in South China,Ministry of Agriculture and Rural Affairs,Guangzhou 510630,China)

机构地区：[1]广东弘科农业机械研究开发有限公司,广东广州510555 [2]广东省现代农业装备研究所,广东广州510630 [3]农业农村部华南现代农业智能装备重点实验室,广东广州510630

出　　处：《保鲜与加工》2023年第2期7-14,共8页Storage and Process

基　　金：广东省农业科研项目和农业技术推广项目(440000210000000086860);广东省农产品产地冷藏保鲜设施建设服务项目(粤财农[2022]92号);2022年省级农业科技发展及资源环境保护管理项目(2022KJ101)。

摘　　要：采用带二次冷凝融霜功能的冷库,研究不同冷库预冷工艺下的荔枝降温特性,建立荔枝预冷过程传热模型。结果表明:相对其他融霜方式的冷库,带二次冷凝融霜功能的冷库库温波动明显减小;不同品种的荔枝在同一条件下,降温速率从大到小分别为桂味、怀枝、糯米糍;预冷库温越低降温越快,但应避免荔枝平均温度降至5℃以下,以防冷害;其他预冷条件相同时,风速越大荔枝降温越快;冷库预冷荔枝的不均匀性在0℃预冷库温条件下较2℃大。通过标定荔枝对流换热系数,预测了单体荔枝的预冷降温过程,并通过试验结果验证了模型的可行性。The cold storage with secondary condensation and defrosting function was used to study the cooling characteristics of litchi under different cold storage pre-cooling processes,and the heat transfer model of litchi pre-cooling process was established.The results showed that compared with other defrosting methods,the temperature fluctuation of cold storage with secondary condensation defrosting function was significantly reduced.Under the same conditions,the cooling rates of different litchi varieties were Guiwei,Huaizhi and Nuomici respectively from the largest to the smallest.The lower the temperature of pre-refrigerated storage,the faster the litchi would cool down,but the average temperature of litchi should be avoided to below 5℃ to prevent cold damage.When other precooling conditions were the same,the higher the wind speed,the faster the litchi would cool down.The inhomogeneity of litchi pre-cooled in cold storage was greater at 0℃ than 2℃.By calibrating the convective heat transfer coefficient of litchi,the pre-cooling and cooling processes of single litchi were predicted,and the feasibility of the model was verified by the experimental results.

关 键 词：荔枝 二次冷凝融霜冷库 预冷库温 降温特性 

分 类 号：S667.1[农业科学—果树学] S609.3[农业科学—园艺学]