Air Distribution Simulation Study Of Prickly Ash Drying Room With Heat Pump

Chinese prickly ash,is indispensable for catering kitchen seasoning;Along with the adjustment of agricultural structure,vigorously promote the development of the agricultural industry characteristic,the consumption of Chinese prickly ash,fast food surface material is more and more big,and these products are mostly use dried prickly ash as the main raw material,so for dried prickly ash demand also increases as the,.Drying is an important processing link,Chinese prickly ash after harvest of Chinese prickly ash transportation,storage,such as play an important role,but if the dry processing is undeserved,can cause Chinese prickly ash quality serious damaged,nutrient loss serious,reduce its economic benefits.Traditional way of drying is low efficiency and long drying time,drying vulnerable to sand,dust and shortcomings and so on all sorts of microbial contamination.In order to improve the agricultural production environment and improve the drying efficiency of the pepper,this paper studies the heat pump drying system.First summarizes the research progress of heat pump drying technology and the research status quo of air distribution,and the measured data in data access on the basis of error analysis,determine suitable for drying room study physical model and boundary conditions,and in the numerical simulation for the related physical parameters such as density,specific heat and temperature of the Settings,make the results of numerical simulation to calculate has higher accuracy.Mainly studied the different drying stage and different initial conditions,the characteristics of flow field inside the drying room changes,and analyzed the buoyant jet in different initial velocity,initial temperature and the effect of flow field characteristics of Chinese prickly ash drying room.At the same time,the change rule of temperature inhomogeneity coefficient and velocity unevenness coefficient under different air supply parameters is evaluated and analyzed.In practice due to consider the overall drying effect of the drying room,ensure the overall drying of material quality,space within "layered effect",in close to the roof air supply rate reduce and uneven airflow,air supply airflow uneven cause local vortex flow,air distribution is poorer,decorate drying rack so should not be too high.According to this characteristic,we need to explore the targeted airflow organization scheme.In tuyere jet,on the other hand,just enter the space,as the initial temperature,temperature along with the development of the jet,because more and more air jet air within the combination of space,jet temperature increased and the ambient temperature is gradually reduced,the jet temperature gradually become slow,uneven and may cause some area,it is also an airflow organization project designers need to solve the problem.In view of the above problems,the method of roof and radiation is adopted to eliminate the unevenness of heat and heat.The results show that:? Compared with the simulation results of unheated radiation plate,the overall temperature distribution is more uniform after optimization,and the maximum temperature area is mostly developed on both sides of the tuyere.The expansion of air flow is more intense,and the trend of temperature distribution is more obvious.?the optimization of mainstream basic keep near the initial temperature,temperature change and then mainstream slowly rising temperature,when X=2.5 m near the place in different stages of the mainstream trend of the temperature rise of stagnation,airflow statified phenomenon is obvious.?After adding the constant temperature radiation plate,the deviation gradually becomes apparent from the left and right sides of the geometric center of the hot air outlet in the z-axis direction,and the maximum deviation distance reaches 0.8m.