Cooling systems

2024: PNIPU scientists modernized the cooling system of gas turbine engine elements

Perm Polytechnic scientists have optimized the cooling efficiency of the turbine blade by modifying the air supply system. An article with the results of the study was published in the journal Vestnik PNIPU. Aerospace Engineering "No. 75, 2023. This was announced on February 1, 2024 by representatives of the Perm Polytechnic. Read more here.

2023: MEPhI develops domestic cooling system for microelectronics

For the first time in many years, the MEPhI National Research Nuclear University has developed the first domestic cooling device necessary for thermal imaging systems (where cryogenic systems provide the superconductivity effect). This was announced on August 18, 2023 by representatives of MEPhI. Read more here.

2020: MISiS scientists have found a way to produce materials for cooling systems cheaper

On November 23, 2020, it became known that scientists at NUST MISIS found a way to reduce the cost of producing composite heat-removing materials for industry and electronics by up to 10 times, which makes it possible to reduce the cost of producing thermal radiators. As initial components, it is proposed to use synthetic rubbers and silicon carbide - having proper thermal conductivity, but poorly conducting electric current. Based on them, elastomeric mixtures are obtained, which are subjected to vulcanization and low-temperature carbonization. An article about the development was published in the journal Polymers.

Method of cheaper production of materials for cooling systems has been developed

According to the company, effective heat removal from electronics elements is necessary, since overheating inevitably leads to a reduction in the service life of expensive equipment. As of November 2020, polymer thermally conductive composites filled with particles with proper thermal conductivity, boron nitride, and various carbon materials are used to create radiators. The proposed approach allows obtaining the geometry of the finished product at the vulcanization stage, minimizing mechanical processing, which reduces the cost of the finished product.

In addition to radiators for cooling systems, the disclosed material can be used in various seals in pumping equipment operating with liquids containing abrasive particles in chemically active media. The proposed materials can replace thermoplastics and artificial graphite in friction units. Such materials have good mechanical characteristics, chemical and thermal resistance, but as of November 2020, such products are highly priced.

A team of scientists from the Center for Composite Materials of NUST "MISIS" has found a way to reduce the cost of production by using composite materials based on carbonized matrices. To create them, synthetic rubbers filled with silicon carbide are used, while the proportion of silicon carbide can reach 450 parts by weight per 100 parts of the matrix.

The production process is quite simple: the filler - silicon carbide is introduced into the rubber on rollers in which the rollers rotate to meet each other at different speeds, due to which large shear loads arise in the gap that allow a large amount of filler to be introduced into the material both in volume and in mass and evenly distributed in the material. Subsequently, the obtained elastomeric mixture is cured in a mold, taking the form of an article, after which it is subjected to low-temperature carbonization at a temperature of up to 360 ° C.

Scientists of NUST "MISIS" have found a way to reduce the cost of producing composite heat-removing materials for industry and electronics by up to 10 times

With this technology, very little waste is generated - the elastomeric mass is not only homogeneous, but also similar in behavior to plasticine or clay. All residues after cutting the blanks can be immediately reused. The resulting material after heat treatment withstands temperatures up to 300 ° C, removes heat well, and hardly conducts current. That is, it can be used in systems for removing heat from various electronic devices. explained Andrey Stepashkin, Ph.D., Senior Researcher, Center for Composite Materials, NUST MISIS

However, as scientists note, their main achievement is not even in the creation of this particular material, but in the revealed patterns of formation of the structure of the obtained materials and their elastic, strength, thermal and other characteristics, depending on the degree of filling, which can be created by the above methods. This makes it possible to predict what characteristics will be obtained and how they will change when replacing silicon carbide, for example, with carbon fiber, natural graphite or boron nitride, which will expand the applications of materials in other fields of technology.

See also

• Cooling technologies in data centers