Simulation And Design Optimization To Temperature Field Of Medicine Cold Storage

With the development of economy and society, people's demand for pharmaceutical and biological products is getting higher and higher. The pharmaceutical cold chain is booming now accompanied by this industry, and it can ensure the quality of the pharmaceutical and biological products in the process of storage and transportation. In recent years, the cold chain industry of China develops rapidly. The pharmaceutical industry has been one of the pillar industries in Guizhou province, which promotes the development of cold chain industry vigorously. The medical refrigerator is a place to storage pharmaceutical and biological products, and it is a very important link in cold chain logistics. At present, the number of cold storages increases rapidly. However, there are not enough research data and work to support the running condition of cold storages. Thus, there is a lot of room for the improvement of the structure design optimization and the energy conservation and emission reduction.Computational Fluid Dynamics is an emerging technology which combines numerical calculation method and data visualization technology to conduct modeling analysis on such physical phenomena as the heat transfer fluid. It is widely used in the engineering because it can overcome the difficulty and the low accuracy of numerical calculation and actual measurement. The paper aims to simulate and analyze the temperature field of the distribution of medical refrigerator in different running conditions by using the Computational Fluid Dynamics software Fluent to find the optimization scheme, so as to find the conditions to storage the pharmaceutical and biological products, which is certainly a guidance and has reference to the building of medical refrigerator. The contents and conclusion of the present study are as follows:Firstly, simulate the temperature field of a cold storage whose actual size is 4×3×2.5m(length by width by height) when in a fan blowing straight cooling mode in different wind speeds, and the numerical calculation method is SIMPLE algorithm and standard k-? two equation model which are widely used in the engineering. By verifying the results of numerical calculation through test, the present study is to discuss and analyze the rationality of numerical calculation. The present study finds out that the rules match well between the results of numerical calculation and the test. The conclusion of numerical calculation and the test proves that cold storage should choose 4m/s wind speed.Secondly, optimize the out way of the wind, and change the fan blowing straight to vent out. Simulate the temperature field in the cold storage and get the results. Then calculate the average temperature and its variance of four representative cross sections, and make a contrast of the value of the fan blowing straight. The conclusion shows that the cold storage has an ideal temperature field because the air circulation is optimized in this way. So the present study suggests the cold storage should use this wind out way to realize optimization design of energy saving.Thirdly, simulate the influence that different goods stacking ways exert on cold storage temperature field so as to find the proper way. There are three forms of goods stacking designed by the present paper in three-dimensional rectangular coordinates: 1) The goods along the X axis direction; 2) The goods along the Y axis direction; 3) The goods along the Z axis direction with 10 cm thick plate. The characteristic is that the goods are raised so the air can circulate. By analyzing and comparing the simulation results, the present study finds out because there is no vortex flow in the third way, so there is an ideal temperature field, as a result, the third way can meet the storage condition of pharmaceutical and biological products and realize the proper goods stacking way.