摘要： 为探究南极磷虾热风干燥特性并构建干燥模型，以冷冻南极磷虾为原料，研究不同温度和干燥量对南极磷虾干燥用时、干燥速率的影响，并分析不同干燥条件下南极磷虾水分有效扩散系数和干燥活化能。采用Lewis、Henderson and Pabis、Page、Modified Page和Wang and Singh五种干燥模型对试验数据进行拟合，以决定系数R2、卡方检验值X2、均方根误差M和误差平方和S为模型拟合效果评价指标，确定最佳干燥模型，并对干燥模型进行验证。结果显示：温度上升或干燥量减小，干燥用时缩短，干燥速率增大，且干燥量对干燥用时及干燥速率的影响小于温度；温度为50 ~ 100℃时，水分有效扩散系数为1.459×10-8 ~ 6.310×10-8，干燥活化能为29.599 kJ/mol；干燥量为0.5 ~ 3.0 kg时，水分有效扩散系数为4.63×10-9 ~ 3.533×10-8；对比5种模型的拟合效果评价指标发现Page模型具有高的R2值，低的X2、M和S值，能更好的拟合南极磷虾试验数据，模型预测值与试验值的重合度高，可准确预测南极磷虾热风干燥过程中水分比变化规律。研究表明：升高温度或降低干燥量均能缩短干燥用时，提高干燥速率，Page模型能准确描述南极磷虾热风干燥过程，可为南极磷虾热风干燥过程的预测和控制提供理论依据。

关键词: 南极磷虾, 热风干燥, 干燥特性, 干燥模型

Abstract: To study the hot air drying characteristics of Antarctic krill and establish a drying model. Methods: Using frozen Krill as raw material, the effects of different temperature and drying quantities on the drying time and drying rate of krill were studied, and the effective diffusion coefficient and drying activation energy of krill were analyzed under different drying conditions. Five drying models, Lewis, Henderson and Pabis, Page, Modified Page, Wang and Singh, were used to fit the test data. The optimal drying model was determined and validated with the determination coefficient R2, Chi-square test value X2, root mean square error M and error square sum S as the evaluation indexes of model fitting effect. Results: The drying time was shortened and the drying rate increased with the increase of temperature or the decrease of drying quantities. The influence of drying amount on drying time and drying rate was less than that of temperature. When the temperature was 50 - 100℃, the effective diffusion coefficient of water was 1.459×10-8 - 6.310×10-8, and the dry activation energy was 29.599 kJ/mol. When the drying amount was 0.5 - 3.0 kg, the effective diffusion coefficient of water was 4.63×10-9 - 3.533×10-8. By comparing the fitting effect evaluation indexes of the five models, it was found that the Page model had a high R2 value and a low X2, M and S value, which could better fit the test data of Antarctic krill. The predicted value of the model had a high coincidence degree with the test value, and it could accurately predict the change law of water ratio in the hot-air drying process of Antarctic krill. Conclusion: Increasing the temperature or decreasing the drying amount can shorten the drying time and increase the drying rate. Page model can accurately describe the hot-air drying process of Antarctic krill, and provide theoretical basis for the prediction and control of hot-air drying process of Antarctic krill.

Key words: Antarctic krill, hot air drying, drying characteristics, drying model