Electric heaters based on nanomodified paraffin with selfinstalling heat contact for antiicing systems of aerospace crafts
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 6, Issue 12
Abstract
Improved effectiveness of ice protection systems of aerospace crafts can be achieved with the development of more effective heaters. Self-regulating electric heaters based on positive or negative temperature coefficient have achieved the highest demand. Development of heaters with such properties involves various matrixes based on cement, glass frit, asphalt mastic, and polymers. Conductivity in such matrixes is governed by metallic or carbon filler. Carbon nanostructures possess the greatest effectiveness. The synthesis method of carbon nanostructures and composites to which they are introduced, the basic properties of resulting electric heaters are determined. To study the effectiveness of electric heaters, a non-contact method of temperature field measurement was used. CNT were synthesized using the Ni/MgO catalytic system, using the thermal decomposition method. CNT morphology was studied using the field emission electron microscope Hitachi H-800. During the investigation, it was found that for the electric heater based on paraffin modified with CNT, the basic specific power was 800±10 % W/m<sup>2 </sup>at an ambient temperature of +10 °C. When the temperature was lowered to -40 °C, specific power increased to 1,600±20 % W/m<sup>2</sup>. Dynamic change of power at different temperatures indicated the presence of a self-regulating effect. Thermal images of the heat contact have revealed that heat radiation stabilizes at 56 °С. The developed heaters can operate at a voltage up to 200 V and possess rational electrophysical and functional parameters, which allow for effective operation in ice protection systems for aircrafts
Authors and Affiliations
Alexander Shchegolkov, Anna Ostrovskaya, Vadym Kovalenko
Keywords
Related Articles
- EP ID EP528351
- DOI 10.15587/1729-4061.2018.151686
- Views 42
- Downloads 0
Defining the parameters for a brush with polypropylene bristle when uncovering the root system of maternal plants
<p><span style="font-family: 'Times New Roman'; font-size: small;">The paper addresses the operation of a cylindrical brush with elastic rods of bristles at the disclosure of the root system of maternal plants. It has be...
Development of meat-containing minced semi-finished products based on the locally produced raw materials
<p>We report results of studying the developed meat-containing semi-finished products; an analysis of the results was performed, which confirm the possibility to combine the meat of duck and freshwater fish meat in the f...
Study into the influence of operating processing parameters on qualitative characteristics of the carrot concentrated product
<span lang="EN-US">The process of concentrating vegetable juice in an improved vacuum evaporator with a stirrer which is simultaneously a heat exchanger was studied. A mathematical model describing kinetics of product he...
Development of the formulation and quality assessment of immunostimulating fresh-mixes with a balanced potassium-protein composition
<p>Using the methods of mathematical modeling, we developed formulations for the immunostimulating fresh-mixes. We determined the percentage of plant raw materials, which corresponds to maximum potassium content in the f...
Construction of the method for building analytical membership functions in order to apply operations of mathematical analysis in the theory of fuzzy sets
<p>This paper considers four methods for finding parameters of the analytical expressions of sigmoids, data on which are given numerically. We have conducted a comparative analysis of the approximation effectiveness usin...