Abstract
Based on the basic working principle and heat transfer characteristics of gravity heat pipe in combination with the grain stack particle's stacking characteristics, this study changes the structure of traditional heat pipe to change the heat transfer mode between the grain stack and the gravity heat pipe so as to improve the grain's heat-dissipation rate and heat-dissipation efficiency. Generally, this system can satisfy the internal heat dissipation requirements of grain stack only under the action of a non-power fan driven by the air in the atmosphere and the temperature difference between inside and outside of the fan. When the internal temperature sensor of the grain stack detects that the internal temperature of the grain stack is high only under the action of the non-power fan, the pipeline booster fan will be started. At the same time, when the gas exchange occurs between the internal gas in grain stack and the external air, the dehumidification and drying of the grain stack can be realized through the gas drying device of the product. Through theory and simulation, this paper conducts a comparative analysis on the variation law of grain stack's temperatures under the action of gravity heat pipe and no gravity heat pipe so as to explore the heat-dissipation system's working efficiency of the new structure gravity heat pipe. The gravity heat pipe and the non-power fan in the system are all green products, which makes this design product have better heat-dissipation effect and less energy consumption.
Highlights
1.1 Current Situation of Modern Food StorageCurrently, China's grain storage methods mainly include cold and low temperature storage, ventilation storage, gas storage, and chemical storage
The gravity type heat pipe is very suitable for deriving the heat inside the grain stack due to its small temperature difference, large heat transfer and isothermal (Shao S, et al, 2013; Shi J T, 2010; Li Z J, et al, 2014)
The results show that the single heat pipe in the japonica rice stack has an influence on the temperature distribution within a radius of 75 mm
Summary
China's grain storage methods mainly include cold and low temperature storage, ventilation storage, gas storage, and chemical storage. China has identified many frequently-used chemical agents and methods, and developed many environmentally-friendly and non-toxic agents to replace agents harmful to the human body (Ma Y, 2014; Cui G H and Cao Y, 2004). The realization of the above grain storage methods is based on the construction of modern factory buildings. Vol 13, No 8; 2019 maintain the temperature, humidity and other parameters in the grain warehouse, people need a large amount of pipeline booster fans. It will consume a lot of electricity per day. Most of the grain storage equipment is backward with poor grain storage conditions, so the quality of grain storage is difficult to be guaranteed
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