Intensification of rapeseed drying process through the use of infrared emitters
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Bulgakov, V.
Bandura, V.
Arak, Margus
Olt, Jüri
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The theoretical basis of the agricultural material drying techniques has been formed in
the world for two and a half centuries. Nevertheless, despite the multitude of studies well
presented in the literature, the i
ndustry still lacks universally recognized methods of design
calculation for the majority of drying problems. Presumably, this is due to the fact that the
dehydration of foodstuffs is one of the most energy
-
intensive and complicated work processes.
In the
process of thermal treatment during the drying, the physical state of the water in the treated
item changes, the properties of the item itself are altered.
Recently, the drying of foodstuffs by means of infrared (IR) radiation has been gaining ever wider
a
cceptance. At the same time, the technologies for dehydrating foodstuffs and materials are now
far ahead of the theory of drying. Not only the classical literature on the drying problems, but
even special studies on the subject cannot provide any specific
recommendations for the design
of installations with the electro
-
magnetic principle of energy input. Whereas that is exactly the
type of installations that are now actively making headway, while offering serious challenges in
their modelling. For that reas
on, experimenting has until now been the only reliable way of their
studying. Despite the available extensive scientific literature on the drying, including works on
IR units, the practical issues of engineering IR driers have not been tackled. All the exi
sting
studies consider solely particular cases.
This study discusses the process of drying the fixed bed
of rapeseeds with the use of the electromagnetic infrared emitter. The energy intensity of the
process and the optimum thickness of the product bed are
determined.
The aim of the paper is to
examine the effect that the operating condition
parameter
s (energy input intensity, temperature,
grain bed thickness) have on the drying kinetics and the energy characteristics of the process. The
methods of research
are based on the thermophysical analysis of the material’s structure. The
experimental studies were carried out with the use of monitoring and measuring equipment, up
-
to
-
date methods and instruments, including solutions developed by the authors. The analy
tical
treatment was performed with the use of the software packages: MathCAD, Excel. The sample
testing and examination took place in the laboratory and the methods were in compliance with
the applicable standards. A comprehensive experimental
investigatio
n
of the effect that the
operating
parameter
s (specific load and power) have on the rape seed IR
-
drying kinetics had been
accomplished.
Kirjeldus
Article
Märksõnad
agricultural engineering, rape, infrared emitters, drying, load, articles