Heat and Mass Transfer During Cooling and Storage of Agricultural Products as Influenced by Natural Convection PDF Download
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Author: K. J. Beukema
Publisher: Bernan Press(PA)
ISBN:
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
Three different models of bulk-stored agricultural products with air flow through the bulk, predicting the temperature profiles or the velocity of natural convection, are developed. The temperature distribution in a cylindrical container with insulated walls and open top and bottom, filled with heat-generating model material is studied experimentally, used to calculate the velocity of natural convection and compared with model predictions. A two-dimensional two-phase model of temperature and moisture distribution during cooling and storage of agricultural products in a cylindrical container is developed. The influence of convective transport (natural and forced convection), heat generation, heat conduction, evaporation, condensation and moisture diffusion is incorporated in the model equations. A sensitivity analyses with this model is presented. The model calculations are compared with the measured temperature course during self-heating of potatoes or model material. Three-dimensional natural convection in a closed container filled with heat-generating products is modelled with a three-dimensional one-phase model. Temperature measurements in a rectangular container filled with model material, potatoes or Brussels sprouts are discussed and compared with the model calculations. Literature on natural convection in porous media with or without heat generation and on models of bulk-stored agricultural products is reviewed.
Author: K. J. Beukema
Publisher: Bernan Press(PA)
ISBN:
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
Three different models of bulk-stored agricultural products with air flow through the bulk, predicting the temperature profiles or the velocity of natural convection, are developed. The temperature distribution in a cylindrical container with insulated walls and open top and bottom, filled with heat-generating model material is studied experimentally, used to calculate the velocity of natural convection and compared with model predictions. A two-dimensional two-phase model of temperature and moisture distribution during cooling and storage of agricultural products in a cylindrical container is developed. The influence of convective transport (natural and forced convection), heat generation, heat conduction, evaporation, condensation and moisture diffusion is incorporated in the model equations. A sensitivity analyses with this model is presented. The model calculations are compared with the measured temperature course during self-heating of potatoes or model material. Three-dimensional natural convection in a closed container filled with heat-generating products is modelled with a three-dimensional one-phase model. Temperature measurements in a rectangular container filled with model material, potatoes or Brussels sprouts are discussed and compared with the model calculations. Literature on natural convection in porous media with or without heat generation and on models of bulk-stored agricultural products is reviewed.
Author: Digvir S. Jayas
Publisher: CRC Press
ISBN: 9780824789831
Category : Technology & Engineering
Languages : en
Pages : 784
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Book Description
This work takes a multidisciplinary approach to grain storage research, applying knowledge from the fields of biology, cereal chemistry, economics, engineering, mathematical modelling and toxicology to the study of the complex interactions among physical and biological variables in stored-grain bulks that cause the deterioration of stored grain. Details the prevention and control of pests and contaminants.
Author: Shlomo Navarro
Publisher: CRC Press
ISBN: 1420040332
Category : Science
Languages : en
Pages : 674
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Book Description
The tightening of health and environmental regulations by banning chemical pesticides has generated the need for alternative technologies to solve grain storage problems. Aeration is such an option that can be applied to stored grain and a wide range of agricultural commodities to control insects and maintain quality. The Mechanics and Physics of M
Author: Vincent A. Dodd
Publisher: CRC Press
ISBN: 9789061919803
Category : Technology & Engineering
Languages : en
Pages : 958
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Book Description
A broad coverage of basic & applied research projects dealing with the application of engineering principles to both food production & processing. Land and water use; Agricultural buildings; Agricultural mechanisation; Power & processing; Management & ergonomics. About 450 papers from over 50 countries worlwide.
Author: International Commission of Agricultural Engineering
Publisher: American Society of Agricultural & Biological Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 560
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Book Description
Author: American Society of Agricultural Engineers
Publisher:
ISBN:
Category : Agricultural engineering
Languages : en
Pages : 1024
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1922
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Book Description
Author:
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 630
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Book Description
Author:
Publisher:
ISBN:
Category : Agricultural extension work
Languages : en
Pages : 506
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Book Description
Author: E. R. G. Eckert
Publisher: Wiley-Interscience
ISBN:
Category : Science
Languages : en
Pages : 714
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Book Description
Continuing the annual review work started in 1954 at the University of Minnesota's Heat Transfer Laboratory, this prestigous volume collates the reviews from the International Journal of Heat and Mass Transfer from 1976 through 1986. Together with a comprehensive author and subject index, it provides the tools for continuous improvements in the efficiency of engineering devices, including the recent awareness of the necessity to conserve energy and to find new energy sources. As an invaluable guide for locating existing literature on important topics, this work helps engineers and students keep abreast of recent developments in specialized research areas.
