Thermal And Humidity Environment And Energy Saving Optimization Of Underground Granary

Our country is actively promoting green grain storage, and hope to promote green, environmental protection, low-power storage mode.National Food Authority and other departments to set 2015 as the construction period of emergency food storage, storage capacity of the construction and renovation of the old barn is the focus of two aspects, in order to solve the shortage of storage facilities and other pressing issues.This article focuses on the underground grain storage buildings for grain storage environment to optimize the low temperature grain storage bunkers own advantages and green grain storage technology to better combine to ensure a better grain storage environment, hoping for a new building or warehouse old warehouse transformation of a reference value.This paper on China’s ecological environment awareness grain storage consolidation, to explore the fundamental nature of food grain, to combine the characteristics of underground grain storage silos own environmental analysis, reflections on the effect of low temperature storage underground silos and grain storage combined with relevant stage of hypothermia technical methods, and the selection of underground bunkers mechanical ventilation and cooling technology research, given the environmental optimization of underground grain storage silos.Learning and familiar with the operation of the CFD simulation software, using FLUENT software use in underground bunkers annular groove mechanical ventilation cooling ventilation simulation analysis, and then the improvement programs proposed to simulate comparative analysis, by analyzing the simulation results, it has been optimized methods underground granary grain storage environment.Summed up the following results:Firstly,analyzed the situation of division and distribution of ecological grain storage area, obtained in different regions of our country differences in grain growing and storage conditions, to understand the food stored in the production area needed for basic storage environment, while the cross-regional food stored at the relevant point of attention has also been a corresponding understanding.Secondly, by understanding the nature of food-related, to understand the physical and physiological properties of food and porous media characteristics.For the storage of wheat grain seeds, finishing a grading of wheat to determine the basic thermodynamic parameters of density of wheat, heat capacity, thermal conductivity,etc. Calculated as the porousmedium grain bulk porosity region, specific surface, tortuosity, permeability and other relevant parameters, to determine the parameters of simulation.Thirdly, the study found the concept of higher latitude regions, the lower the value of underground underground thermostat thermostat values, combined with the main building envelope are buried underground granary built underground, are not affected by seasonal weather changes outside, but by the underground thermostat value affects about building sites, storage temperature below ground temperature influence, so underground granary itself has a relatively stable temperature advantage.By analyzing the underground granary grain storage environment, come to meet the reasonable underground silos in duct arrangement, appropriate supply air temperature, and reasonable warehousing grain moisture and other conditions, mechanical ventilation when considering changes to simplify the compartment humidity can focusing on mechanical ventilation in the warehouse cooling analysis, in order to simplify simulation of underground storage of grain thermal and humidity environment to provide ideas.Fourth,using GAMBIT software to build underground bunkers annular plenum use mechanical ventilation physical model simulation using FLUENT calculations, analyze the results and for the distribution of the weak part of the cooling zone, combined with a special circular underground granary warehouse bottom shape of the annular duct the arrangement put forward optimization improvements were analyzed again after the simulation, the simulation results obtained show that the optimized cooling zone to get rid of the weak, and further improve the uniformity and cooling rate cooling grain heap.Summed up the round ventilation slots for optimal layout underground granary and after mechanical ventilation can be faster and more uniform temperature drops grain storage environment, optimizing underground granary grain storage environment while reducing energy-saving fan operation time to reach goal.In summary, the underground granary itself has the advantage of low-temperature technology combined with the green grain storage, grain storage temperature mechanical ventilation technology as a means of underground bunkers through ventilation slots using the new layout and optimization, numerical simulation CFD binding software for simulation, analysis of the results, the program gives proof underground grain storage building to improve grain storage thermal and humidity environment is valid.Wei Li(HVAC Major)...