DOI QR코드

DOI QR Code

Simulation of Temperature Changes of Rough Rice Stored in Round Steel Bin (I) - Development of a Simulation Model -

시뮬레이션에 의한 저장 벼의 곡온 예측

  • Keum D.H. (Dept. of Bio-Mechatronic Engineering, SungKyunKwan University) ;
  • Kim J.Y. (Dept. of Mechanical Engineering, Sangju National University) ;
  • Kim H. (Korea Food Research Institute)
  • Published : 2006.08.01

Abstract

A one-dimensional heat conduction problem in cylindrical coordinate system was solved using Crank-Nicolson finite difference method to predicting the temperature distribution in rice storage bin with wall insulator. The model can simulate the grain temperatures in insulated round bins using the input data of initial grain temperature. ambient air temperature, wind velocity, solar radiation on a horizontal surface, and thermal properties of grain, bin wall, wall insulator, insulator cover, and air. Temperatures were collected at the bin center, 0.65m in radial direction from the center, and near the bin wall in 2.7m diameter bin filled with rough rice to depth of 3.0m were used to validate the simulation model. Grain temperatures predicted by the model were in very good agreement with the measured temperatures. The residual mean square error between measured and predicted grain temperatures at the bin center was $1.38^{\circ}C$.

References

  1. ASAE STANDARDS. 1996. Thermal properties of grain products. ASAE D243.3:451
  2. Chang, C. S., H. H. Converse and J. L. Steele. 1993. Modeling of temperature of grain during storage with aeration. Transactions of the ASAE 36(2):509-519 https://doi.org/10.13031/2013.28367
  3. Degelman, L. O. 1970. Monte carlo simulation of solar radiation and dry bulb temperatures for air conditioning purposes. Dept. of Arch. Eng., Pennsylvania State Univ. Report No. 70(9)
  4. Keum, D. Hand J. y. Kim. 1991. Prediction of temperature, moisture content and quality changes in stored bulk rough rice. J. of the Korean Society for Agricultural Machinery 16(1):49-59. (In Korea)
  5. Kim, D. C., O. W. Kim and D. H. Keum. 1998. Respiration characteristics of rough rice. J. of the Korean Society for Agricultural Machinery 23(4):335-342. (In Korea)
  6. Lo, K. M., C. S. Chen., J. T. Clayton and D. D. Adrian. 1975. Simulation of temperature and moisture changes in wheat storage due to weather variability. J. Agric. Eng. Res. 20(1):47-53 https://doi.org/10.1016/0021-8634(75)90094-3
  7. Munroe, M. M. 1980. Estimation of totals of irradiance on a horizontal surface from U. K. average meterological data. Solar Energy. 24(3):235-238 https://doi.org/10.1016/0038-092X(80)90479-X
  8. 宇田川光弘, 木村建一. 1978. 水平面全天日射量觀測値よりの直達日射量の推定. 日本建榮學會論文報告集. 267. pp.83-90
  9. 字田川光弘, 小林英明. 1986. 空調負荷シミュレ一ショソ用氣象 デ一タの簡易作成法. 日本建築學會大會學術講演便槪集. pp.703-704