MATHEMATICAL MODEL OF THE TIMBER DRYING PROCESS WITH DISCRETE LOCATION OF SUPER HIGH FREQUENCY ENERGY SOURCES

Abstract The paper is devoted to development and parameters studying of two-resonator super-high-frequency (SHF) generator based on continuous flow principle of action. It is equipped with two quasi-stationary toroidal resonators; so it allows to separate such processes of cattle colostral milk treatnent as defrosting and heating and thus to ensure both the electromagnetic safety and the high electric field strength. In order to improve efficiency of the cattle colostrum defrosting/heating performed by its exposure to the super-high frequency electromagnetic field, the methodology was developed for the SHF generator designing. It includes, firstly, development & studying of mathematical models based on due consideration of the phase transitions and, secondly, the structural designing of the SHF generator working chamber with examination of its effective operating modes. The mathematical model is proposed of the electromagnetic waves interaction with the raw material (colostral milk) being in different physical states. With aid of the electric field strength control (by the generators power changing) and the gap adjustment in the capacitor part of the resonators (by smooth movement of the common perforated base), it is possible to achieve the equipment capacity up to 170… 200 L/h. The energy expenses are 0.025 (kWh)/kg.

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Mathematical Models of Papermaking

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2001.6.1.15221 ◽

2001 ◽

Vol 6 (1) ◽

pp. 9-19 ◽

Cited By ~ 1

Author(s):

A. Buikis ◽

J. Cepitis ◽

H. Kalis ◽

A. Reinfelds ◽

A. Ancitis ◽

...

Keyword(s):

Mathematical Model ◽

Initial Value Problems ◽

Moisture Transfer ◽

Bound Water ◽

Drying Process ◽

Initial Value ◽

First Order ◽

Heat And Moisture ◽

The Mathematical Model ◽

The Web

The mathematical model of wood drying based on detailed transport phenomena considering both heat and moisture transfer have been offered in article. The adjustment of this model to the drying process of papermaking is carried out for the range of moisture content corresponding to the period of drying in which vapour movement and bound water diffusion in the web are possible. By averaging as the desired models are obtained sequence of the initial value problems for systems of two nonlinear first order ordinary differential equations.

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Ultra-thin Super High Frequency two-port ALN contour-mode resonators and filters

TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference ◽

10.1109/sensor.2009.5285390 ◽

2009 ◽

Cited By ~ 8

Author(s):

M. Rinaldi ◽

C. Zuniga ◽

C. Zuo ◽

G. Piazza

Keyword(s):

High Frequency ◽

Contour Mode ◽

Super High Frequency

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The SIRIO satellite, 1968––1977: Between scientific engagement and managerial inexperience

Historical Studies in the Physical and Biological Sciences ◽

10.1525/hsps.2004.34.2.371 ◽

2004 ◽

Vol 34 (2) ◽

pp. 371-398

Author(s):

LUCIA ORLANDO

Keyword(s):

International Economic ◽

Organizational Structure ◽

Frequency Band ◽

High Frequency ◽

Aerospace Industry ◽

Space Research ◽

High Frequency Band ◽

Political Uncertainty ◽

The 1960S ◽

Super High Frequency

ABSTRACT: The story of the first Italian communications satellite, SIRIO, started in 1968, after the failure of the European project for the vector ELDO-PAS. The story up to the launch in 1977 involved the encumbering legacy of the San Marco satellite's success in the 1960s, political uncertainty in Italy, international economic crises of the 1970s, an overtly complex management system, and an inexperienced aerospace industry. Despite these handicaps, SIRIO won the race with its nearest competitor, the European satellite OTS, which had a similar research aim in the super high frequency band. In addition to collecting a large amount of useful data, SIRIO catalyzed the process for developing an improved organizational structure for Italian space research.

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