New thermal modules, Scientists have created can be used in devices for the efficient conversion of heat loss have higher performance and range of use than any of the known world analogues.
The project manager said that the experiments to create the most optimal thermoelectric devices began in IrGTU two years ago. Successful results have been achieved largely thanks to new equipment, which has acquired university program development NIU.
"Issues related to energy conservation are becoming more and more relevant, and we begin to count how many we have heat escapes through the window openings, poorly insulated walls, ventilation, water supply and sewerage — emphasizes the development prospects Igor Shelehov.- If you reduce the loss through windows and walls still somehow turns out that modern devices to reduce losses in ventilation systems, water supply and sanitation are far from perfect, and require new and innovative approaches. In recent years, considering the trend of development of new technology in the electronics industry, and new composite materials awakened interest thermoelectric devices. In particular, they are widely included in our daily life as a temperature sensor. "
According to the authors of the project, the thermoelectric converter is a wafer consisting of two parts — if one side attached to the heat, and the other to the cold, the electricity will be generated. Modern science is constantly looking for new semiconductor compositions and progress in this area depends not only on theory but also from practical experiments. To date, there is no thermoelectric material, that would satisfy the industry for its properties. I. Shelehov used in the project a few of their "know-how". In particular, he developed the idea of the distribution of the heat transfer area and synthesized semiconductor thermoelectric material that has provided the highest in the world today coefficient converting heat into electricity.
IrGTU scientists were able to create a thermoelectric module on a flexible substrate size 2210/189 mm.
"The distance between the thermocouples — wafers which are teploprinimayuschimi surfaces could dissolve 16 cm — specifies I. Shelehov.- The result is a technological breakthrough because no known thermoelectric device in which the distance between the conductors was to more than 1 cm above the sample obtained by low-temperature process cycle, significantly reduced its cost. Thermoelectric module can convert thermal energy into electrical energy in the range from -50 to +250 ° C. For example, if one side heated to 210-218 ° C, and the second chilled to 0-1 ° C, then the generated voltage of 0.5 V. Moreover, we used a total of 60 semiconductor junctions, and attaching them to the standard module 400 pieces " .
The first positive results have shown the great potential of this technology and open new possibilities of application of thermoelectric devices for air conditioning systems, refrigeration equipment.
"We will continue the experiments in this direction and the goal is to increase the distance between the wafers by half a meter. We plan that the competitive advantage of our thermoelectric elements will allow in the future to enter the market with a fundamentally new product that does not work when the noise issues. We are ready to offer producers quiet technology with high efficiency, "- said I. Shelehov.
Previously created by scientists IrGTU experimental models of thermoelectric devices have been tested in various fields, such as in an apartment building in Irkutsk conducted research on the utilization of heat loss from the system of cold and hot water and converting them into electrical energy.
"It turned out that these" losses "can provide lighting in the basement entrance and five-storey building — said I. Shelehov.- Termoustroystvo also used in laying hot asphalt, which has long been cold. Termoustroystva panel placed on the warm asphalt and get electricity that could light up the road. In addition, the design may be useful not only in the urban economy, but also in everyday life. If one side termoustroystva heat on the stove and put on another cup of cold water, then this is enough energy to charge a phone or a car battery. And if the battery is large enough to roll into a tube and wear, such as a chimney, we can provide energy to holiday house or a bath. "
According to him, the thermoelectric devices will help to return to the network teplomoschnost of ventilation systems. The residual temperature of the water that we use when taking a shower or bath can also be converted to electrical energy.
I. Shelehov said that this year he and his colleagues intend to develop a regulatory and technical documentation for the proposed technology and prepare an application for an international patent.
The thermoelectric effectDespite the fact that the thermoelectric effects were discovered in 1821 by Thomas Johann Seebeck, in 1834, Jean-Charles Peltier, in 1858, William Thomson (Lord Kelvin), the practical application they are found only in the second half of the twentieth century. The phenomenon of electrical current in a closed circuit consisting of compounds dissimilar conductors between which a temperature gradient has been called Seebeck effect or Peltier effect. Manufacturing technology converters complicated and expensive, so they are not widely used. In the domestic sphere thermoelectric coolers are not practically used because of the high cost in relation to a massive household equipment. Furthermore, the use of thermoelectric modules is limited to that mass production technology for manufacturing customized in standard thermoelectric modules pyroceramics (ceramic material) substrate size 40 * 40 and 60 * 48 mm.