Geometric characteristics of lamellar ribbed heat exchangers with channels of variable section

• Published in: Chemical and petroleum engineering Vol. 27; no. 3; pp. 140 - 144
• Main Authors: Suslov, A. D., Linevich-Yavorskaya, N. P., Frolov, Yu. D.
• Format: Journal Article
• Language: English
• Published: 01-03-1991
• Subjects: Design; Mathematical models; Q1
• ISSN: 0009-2355; 1573-8329
• DOI: 10.1007/BF01150084

The intensity of the heat exchange is determined by the heat transfer factor j which for a given lamellar ribbed surface (LRS) depends on the flow conditions of the heat carrier. For thermal and design calculations of lamellar ribbed heat exchangers (LRH) it is indispensable to have information on the change of the geometry of the hood along the heat exchanger. The most important geometric characteristics of LRS are compactness, equivalent diameter, and also the degree of constraint. This paper examines their change along the channel of the heat exchanger in connection with some LRS with discontinuous ribs. The geometric characteristics of the initial hoods under consideration are presented. On the basis of our work the following conclusions can be reached. The use of a deformed hood with variable equivalent diameter makes it possible to construct fundamentally new heat exchangers differing substantially from the traditional LRH. The production of the suggested compact and effective LRH with variable section of the channels does not require additional complex technological equipment because LRS series produced by industry can be used. On account of the lateral deformation under consideration the geometric characteristics of LRS can be substantially improved.