Further, we consider the compactness factor, as comparative analysis of various designs of conventional recuperators and ribbed plate recuperators.
Design of heat transfer surfaces of ribbed plate recuperators provide uniform distribution of incoming flows (both on the flue and on the air sides). The gas flows at the inlet are evenly distributed into numerous streams, and flow motion occurs in narrow slot channels.
These conditions increase the degree of uniform heating of heat transfer surfaces, both from the side of the heating medium and from the side being heated. This, in turn, reduces thermal stresses and, accordingly, structural damage.
Ribbed plate recuperators are made of stainless sheet steel, the thickness of all heat transferring surfaces is usually 1.5 mm.
Technical data of ribbed plate recuperators
Technical data of ribbed plate recuperators can be selected optimally for specific customer requirements and can vary over a wide range depending on a number of parameters:
- the speed of gas medium (heating, heated);
- the fins pitch and height of fins (ribbed panel);
- the direction of motion of gas medium;
- the number of passes of air ducts; modular sections layout.
Analyzing the above information on existing recuperators and ribbed plate recuperators, we set forth the technical parameters of the above recuperators in the form of tables, where we indicate the initial and calculated parameters according to technical literature sources *. Calculations of ribbed plate recuperators were carried out according to a software developed by Termo Nord Stream LLC – TERMO (version 4.1).