CORRUGATED INSERT FOR PLATE HEAT EXCHANGER Russian patent published in 2012 - IPC F28F3/02 

FIELD: power engineering.

SUBSTANCE: corrugated insert for a plate heat exchanger comprises double-sided asymmetrical hollows made as rounded along a rounding radius and forming narrowing sections of each channel, arranged with an equivalent hydraulic diametre making 0.65-0.92 of an equivalent hydraulic diametre of a smooth section of the channel, with the height of a corrugation channel, equal to 4-6 steps of corrugation ribs, the ratio of the value of the outer radius R of coupled surfaces of double-sided asymmetrical bores forming adjacent and smoothly rounded ledges and grooves of asymmetrical bores transverse to direction of the coolant flow, to the value of the equivalent hydraulic diametre of the smooth section of the channel d is equal to 0.05-0.20 (R/d=0.05-0.20), at the same time the maximum length n of the section of transverse ledges and grooves at corrugation ribs is determined as the distance between areas of coupling with radius R₁ of side faces of the section of transverse ledges and grooves of double-sided asymmetrical bores with corrugation ribs, at the same time coupling of side faces of the section of double-sided asymmetrical bores with corrugation ribs along the coupling radius R₁ is arranged at the distance k from the area of coupling of the radius part of corrugation tops with their ribs, equal to or more than the value of the half of the inner rounding radius of corrugation tops R₂ (k≥0.5*R₂), and sections of side faces of transverse ledges and grooves of asymmetrical bored are arranged in the form of coupled differently directed two arcs of identical radius R₁, besides, at the peripheral sections of the corrugation ribs at the coolant inlet and outlet from the corrugated insert to create smooth peripheral sections of the triangular sections there are equidistantly arranged indents of double-sided symmetrical bores with the depth h₁, the value of which is twice less than the depth h₂ of indents of double-sided asymmetrical bores (h₁=0.5*h₂).

EFFECT: higher thermal-hydraulic efficiency of a corrugated insert for a plate heat exchanger and quality of their manufacturing.