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- Title
Модернізація системи охолодження магнетронів малої потужності
- Authors
Бошкова, І. Л.; Тітлов, А. С.; Волгушева, Н. В.; Колесніченко, Н. О.; Сагала, Т. А.
- Abstract
The article of providing the thermal regime of the anode block of the magnetron by replacing the air cooling system with the liquid cooling system is considered. It is claimed that the liquid cooling system is most suitable for magnetrons, which currently provide an air cooling system, but are not designed for long-term work in the composition of industrial microwave device. The organization of the liquid cooling system will allow the magnetron to work for a long time without overheating and under favorable conditions, in which the clogging of the heat transfer surface by particles and dust and the overheating of the surface of the anode block are excluded. The main element of the developed liquid cooling system is a cooling jacket, which is a circular channel made of heat-conducting material. The cooling jacket is fastened directly to the anode block, the degree of compression of the surfaces and the thickness of the air gap should provide a minimum total thermal resistance. An empirical dependence was obtained to determine the heat transfer coefficients, which reflects the fact that viscous and viscosity-gravity modes of motion are rational when cooling the anode block. The main thermal characteristics of the cooling process, including the heat transfer coefficient, the change in the coolant temperature, the maximum permissible inlet temperature, are determined. The calculations were performed for two types of coolants: water and 54 % ethylene glycol aqueous solution. The application of this circuit solution and the choice of rational calculation modes allows to solve the problem of increasing the efficiency of production and reliability of microwave technology.
- Subjects
HEAT transfer coefficient; COOLING systems; MICROWAVE devices; ETHYLENE glycol; AIR gap (Engineering); THERMAL resistance; ANODES
- Publication
Refrigeration Engineering & Technology, 2019, Vol 55, Issue 3, p158
- ISSN
0453-8307
- Publication type
Article
- DOI
10.15673/ret.v55i3.1573