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Far infrared convection combined heat transfer is one of the best methods for energy saving and drying. In this paper, a comprehensive experimental study and analysis of the far infrared convection combined drying was carried out, to explore the intrinsic link and interaction between parameters in the drying process. Far infrared convection combined heat transfer was discussed in detail. The test...
Based on energy-saving and quality-keeping drying concept proposed by domestic and overseas scholars in recent years, this paper designs a new experiment scheme.The test was performed on the self-made test bench by means of far infrared convection combined drying method.To explore the intrinsic link and interaction between parameters in the drying process, the inlet air volume was 15.24 m3/h, 18.78...
Far infrared convection combined heat transfer is one of the best methods for energy saving and drying. In this paper, a comprehensive experimental study and analysis of the far infrared convection combined drying was carried out, to explore the intrinsic link and interaction between parameters in the drying process. Far infrared convection combined heat transfer was discussed in detail, the test...
In this paper, the quadratic regression general combinational design was used to ensure the color quality of fresh potato after hot air drying and to optimize of hot air drying process based on a single factor test. Considering the temperature of hot air, the velocity of wind and he length of chop, the brightness degree value L, red degree value a, yellow degree value b and drying time t of the product...
According to the drying characteristics of grain, a new type of recirculating grain dryer was optimized and designed. Used the method of thin layer drying, dynamic fault flow, on-line automatic weighing and water measuring and other methods, combined electric resistance water measuring method and oven water measuring method, the feasibility and accuracy of on-line automatic weighing and water measuring...
Moisture content, humidity, wind speed and temperature were measured by the monitoring system in order to analyze the energy change in the process of moisture migration and optimize the barn structure. The results showed that high water area concentrated in the west side of bottom in four barns. Absolute water potential and corn temperature were on the rise as the same as the drying rate. Wind speed...
Temperature, humidity and weight sensors were used collecting corn ear of temperature, humidity and weight value in order to calculate the corn moisture content in the experiment of natural ventilation drying. Average moisture diffusion coefficients were calculated by using Parts' equation of the moisture, temperature and the diffusion coefficient established to estimate the moisture diffusion activation...
A mathematical model was selected and established based on the granary internal temperature and humidity real-time monitoring. In the experiment, the relative humidity of different water content corns were predicted by using different saturated vapor pressure formula and select the fittest model by comparing with the calculations and the test results. The humidity calculated by the saturated vapor...
In winter, our country northern regions snowfall has the characteristics of lasting a long period, large amount and wide of snow. The temperature lower is the reason why snow isn't melted for a long time, the road will form a hard solid ice and snow with membrane on its surface by means of vehicles and pedestrians repeatedly rolling, which has caused great inconvenience to vehicle traffic and people...
To ensure the quality of the dried grain and improve the intelligent level in drying process, the automatic control system for grain drying machine is developed. Based on virtual instrument and predictive control, the system can automatically detect moisture content and temperature, calibrate moisture sensor, detect faults and alarm, automatically control the air temperature and predictive control...
Based on water potential theory and due to the first law of thermodynamics, vacuum drying heat and mass transfer characteristics of a single grain were analyzed, a mathematical model was built and. using analytic method for numerical solution of differential. The heat and mass transfer simulation system under vacuum dry conditions was obtained. This system operable, performance and reliable, which...
Take Yunma-2 as the research object discussed the shearing force and shearing strength of the bottom stalk of china-hemp. The study showed that the mean maximum shearing force was 1373.8N; the mean maximum shearing strength was 10.87 MPa in harvesting period. The maximum shearing force increased along with the stalk diameter, and the shearing characteristics were influenced mostly by the stalk's maturity,...
This paper presents the development of an intelligent grain moisture content measuring system based on SCM 8031. By adopting technologies of artificial neural network (ANN), virtual instrument (VI) and others, the system achieves digitization of the total moisture content measuring process (distributed measuring and centralized data processing) with characteristics of high precision and stability,...
In recent years, caused by farmland environment for agro-food safety events and sudden public events are gradually increase the situation. The current China agro-food environmental situation is far from optimistic. In this paper, new, fast and efficient farmland environment technology and instrument equipment already become this field of important scientific and technological requirements. Based on...
Process control over rice vacuum drying directly affects the taste quality of dried rice. Drying temperature, initial rice moisture content and vacuum degree are the main parameters that affect rice-drying process. This paper makes research on the change law of taste quality of brown rice versus drying parameters during vacuum drying process through establishment of neural network model between brown...
We designed a new type of multi-point piezoelectric vibrating feeding device and did some research on the transport properties of the two-symmetric-point vibration source devices. Meanwhile, we also analyzed all the factors influencing the velocity of the material-supplying device and indentified the working frequency and voltage, the basic linear relationship between voltage, installation angle-α...
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