Simulation Study And Optimization Of Airflow Organization In Cruise Food Cold Storage

The airflow organization in the cold storage is an important factor affecting the temperature distribution and the uniformity of the velocity distribution inside the cold storage.Reasonable setting of the air supply mode,the arrangement of the air outlet and the airflow guiding method in the cold storage will have a great impact on the airflow organization in the cold storage.The trimethylamine(TMA)gas emitted by the fish will cause serious pollution to the remaining frozen products,and ensuring that the remaining types of frozen products are not contaminated is an important condition for ensuring the quality of the frozen products.This paper takes an actual poultry/fish shared cold storage in a cruise ship as the research object,and uses CFD software to simulate its airflow organization,comparing different airflow guiding methods,different air supply modes,air outlet and cargo stacking code to cold storage.The influence of the internal airflow organization leads to the best solution.The main contents of this paper are as follows:(1)Establish the experimental cold storage physical model,compare the simulated data with the experimental data,and ensure the credibility of the selected turbulence model and algorithm;(2)Establish a centralized stacking code under the direct blow air supply mode The cold storage model simulates the gas distribution of TMA gas in the cold storage under different airflow guidance modes to ensure that the frozen meat products are not contaminated by TMA gas;(3)Establish cold storage models with different air supply forms and different stacking codes.Simulated calculation,choose the air supply mode and stacking method suitable for the cold storage to ensure the storage quality of frozen fish and frozen fish.Through comparative analysis,the provision of a flow guiding fan in the channel is not conducive to the emission of TMA gas from fish frozen products.There is more TMA gas accumulation in the poultry refrigerating room;increasing the air supply volume in the poultry refrigerating room has better barrier effect on TMA gas.However,there are still some areas where TMA gas accumulation exists;the addition of an air outlet in the fish refrigerating room has an excellent effect on TMA gas barrier,and there is very little TMA gas accumulation in the poultry refrigerating room,which can ensure that the frozen products of the poultry are not polluted and remain better quality.When the cold storage adopts direct blow air supply from the fan,the uniformity of temperature distribution and temperature distribution in the cold storage is poor,which leads to an increase in the dry consumption of the frozen product and a decrease in quality.The uniformity of the air supply is better when the air duct of the air supply fabric is used.The distribution is even,but the TMA gas accumulation in the poultry refrigerating room is more,which leads to the pollution of poultry frozen products;When the wind is blown by the side air outlet of the air duct,the uniformity of the cold storage temperature is better than that of the direct blow of the fan which is lower than that of the air supply of the orifice plate and the air duct of the fiber fabric,but it can ensure that the accumulation of TMA gas in the poultry refrigerating room is less,which is suitable for the cold storage.The three stacking methods have little effect on the temperature distribution in the cold storage.