Modelling and Simulation Heat Transfer in Wheat Stored in a Simulated Sealed Pit
-
Mohamed A. Ismail
A mathematical model was developed to predict the change of temperature distribution with time in the radial and axial directions in a simulated sealed cylindrical pit. The finite difference method was used in the model to calculate the conductive heat transfer. The model predicts the grain temperatures in the pit during the storage period using input data of initial grain temperature, storage time and number of spatial elements in both radial and axial directions. Other input data include the finite difference spatial increment in both directions, the finite time increment, temperatures of soil surrounding the pit and the physical properties of grain, pit wall material and surrounding soil. To validate the model, predicted temperatures were compared with measured data for wheat of Apollo variety being stored in a simulated sealed pit for a period of 70 days. The wheat was stored in a cylindrical mild steel tank with 0.6 m in both diameter and height. The initial uniform grain temperature was 15°C and the initial uniform grain moisture content was 12.45% (w.b.). Both measured and predicted wheat temperatures attained steady state within a short period of storage (2 to 6 days) and this equilibrium was maintained throughout the experiment period. At the end of the storage period, the grain temperatures were decreased by an average of 2.63°C and the grain moisture contents were increased by an average of 1.62% (w.b.) at the top layer of the pit. For the bottom layer of the pit, the grain temperatures increased by an average of 7.04°C and the grain moisture contents were decreased by an average of 0.50% (w.b.) The conductive heat transfer model predicted the grain temperatures with a standard error of estimate between measured and predicted of 0.12°C -0.25°C.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
Articles in the same Issue
- Shorter Communication
- Isolation and Physico-chemical Characterization of Mung Bean Starches
- Comparative Study on Storage of Fruits and Vegetables in Evaporative Cool Chamber and in Ambient
- Use of Natural Coagulants of Plant Origin in Production of Soycurd (Tofu)
- Stabilization of Moisture Sorption in Spray-Dried Bioactive Compounds by Using Novel Fibre Carriers to Crystallize the Powders
- Article
- Modelling and Simulation Heat Transfer in Wheat Stored in a Simulated Sealed Pit
- Heat Transfer Coefficient in Helical Heat Exchangers under Turbulent Flow Conditions
- Experimental Studies on Parboiling of Paddy by Ohmic-Heating
- Evaluation of Technological Characteristics of Some Varieties of Sorghum (Sorghum Bicolor) Cultivated in the Soudanosahelian Zone of Cameroon
- Control of Main Stored-Grain Insects with New Formulations of Entomopathogenic Fungi in Diatomaceous Earth Dusts
- A Thermomechanical Preprocessing for Pectin Isolation from Orange Peel with Optimisation by Response Surface Methodology
- Rheological Properties of Chocolate Drink from Cupuassu
- Recovery of Polyphenolics from Apple Juice Utilizing Adsorbent Polymer Technology
- Response to an Article
- Effect of Conditioning on the Production of Inulinase by Kluyveromyces marxianus var. bulgaricus through Fed-Batch Fermentation
Articles in the same Issue
- Shorter Communication
- Isolation and Physico-chemical Characterization of Mung Bean Starches
- Comparative Study on Storage of Fruits and Vegetables in Evaporative Cool Chamber and in Ambient
- Use of Natural Coagulants of Plant Origin in Production of Soycurd (Tofu)
- Stabilization of Moisture Sorption in Spray-Dried Bioactive Compounds by Using Novel Fibre Carriers to Crystallize the Powders
- Article
- Modelling and Simulation Heat Transfer in Wheat Stored in a Simulated Sealed Pit
- Heat Transfer Coefficient in Helical Heat Exchangers under Turbulent Flow Conditions
- Experimental Studies on Parboiling of Paddy by Ohmic-Heating
- Evaluation of Technological Characteristics of Some Varieties of Sorghum (Sorghum Bicolor) Cultivated in the Soudanosahelian Zone of Cameroon
- Control of Main Stored-Grain Insects with New Formulations of Entomopathogenic Fungi in Diatomaceous Earth Dusts
- A Thermomechanical Preprocessing for Pectin Isolation from Orange Peel with Optimisation by Response Surface Methodology
- Rheological Properties of Chocolate Drink from Cupuassu
- Recovery of Polyphenolics from Apple Juice Utilizing Adsorbent Polymer Technology
- Response to an Article
- Effect of Conditioning on the Production of Inulinase by Kluyveromyces marxianus var. bulgaricus through Fed-Batch Fermentation
