The research of the fluid distribution through the pipes of a shell-and-tube heat exchanger when employing different methods of fluid injection into the apparatus and new distribution devices creation
| Autor: | O. I. Klyuev, S. A. Rusanov, K. V. Lunyaka |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
Materials science Distribution (number theory) Materials Science (miscellaneous) lcsh:Mechanical engineering and machinery education Mechanics розподільні пристрої General Business Management and Accounting Industrial and Manufacturing Engineering рівномірність розподілу теплоносія по трубах витрата енергії на перекачування рідини lcsh:TJ1-1570 Fluid injection Business and International Management теплообмінний апарат General Agricultural and Biological Sciences lcsh:Mining engineering. Metallurgy Shell and tube heat exchanger |
| Zdroj: | Vìsnik Priazovsʹkogo Deržgavnogo Tehničnogo Unìversitetu. Serìâ: Tehnìčnì Nauki, Vol 0, Iss 38, Pp 53-58 (2019) |
| ISSN: | 2225-6733 |
| Popis: | The results of studies of the inlet pipe location (axial, radial, tangential) influence on the uniform distribution of the heat carrier through the pipes of a shell-and-tube heat exchanger and the energy consumed for pumping the heat carrier are presented. As it becomes apparent from researches, radial and tangential introduction has advantages over axial introduction as to evenness of liquid distribution along the pipes of heat exchanger and power expended on pumping. So, with radial introduction it is possible to attain practically even distribution of heat carrier along the pipes, influencing on such structural features of heat exchanger, as correlation of diameters of the inlet pipe and the lid (Dар/D0 = 4,7). With less diameter of the inlet pipe (Dар/D0 = 7,5) it is possible to attain equalization of the speeds of the heat-carrier in different pipes increasing the relation of the lid height to its diameter (h/Dар); it being necessary to take into account when making heat-exchangers. If these criteria are not adhered to it is necessary to use special distributive devices. With respect to the expense of power, used for pumping liquid it is expended the least with tangential introduction of liquid into the heat exchanger. As to the axial introduction of liquid into the heat exchanger it is impossible to attain even distribution of speeds of heat carrier over the plane of the pipe grate just increasing the diameter of the inlet pipe and the lid height, therefore special distributive devices are required in this case to get even speeds. To adjust the hydraulic resistance over the heat exchanger section it was suggested to use flat insertions with the calculated resistance of the fragments. The necessary resistance was created by drilling out the necessary number of openings, it being determined from Euler equation. Based on the obtained data, an insert design has been proposed, which combines the design features of both a “pipe- in- pipe” type heat exchanger and a shell-and-tube heat exchanger |
| Databáze: | OpenAIRE |
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