| 摘要 |
Present invention relates to a channel system for improving the relation between pressure drop and heat, moisture and/or mass transfer of fluids flowing through said system, said channel system comprising at least one channel comprising at least a first and a second flow director, said channel having a cross-section area A and a first and a second cross-section area A1, A2 at respective flow director, said flow directors extending in a fluid flow direction and transversely to said channel, and comprising an upstream portion, deviating, in said fluid flow direction, from a channel wall of said channel inwardly into said channel, a downstream portion returning, in said fluid flow direction, towards said channel wall, and an intermediate portion located between said upstream and downstream portions, wherein said first cross-section area A1 at said first flow director is smaller than said second cross-section area A2 at said second flow director. |
| 主权项 |
1. Channel system for improving the relation between pressure drop and heat, moisture and/or mass transfer of fluids flowing through said system, said channel system comprising:
at least one channel having a height H between 1.0 mm and 3.5 mm and a triangular cross-section A,
said channel including at least a first and a second flow director extending in a fluid flow direction and transversely to said channel, each flow director having a height of at least 0.35*H,said channel having a first cross-section area A1 at the first flow director and a second cross-section area A2 at the second flow director, said first cross-section area A1 being smaller than said second cross-section area A2, each of said flow directors comprising,
an upstream portion deviating, in said fluid flow direction, from a channel wall of said channel inwardly into said channel,a downstream portion returning, in said fluid flow direction, towards said channel wall, andan intermediate portion located between said upstream and downstream portions, said intermediate portion including a flat part which is parallel to said channel wall,at least one of said flow directors comprising,
a first transition between said channel wall and said upstream portion, anda second transition between said downstream portion and said channel wall, said first and second transitions being curved with a desired radius, the desired radius of the first transition being greater than the desired radius of the second transition, wherein,a flat part of said upstream portion of at least one of said flow directors has a first angle of inclination in relation to a plane of said channel wall from which said upstream portion deviates,a flat part of said downstream portion of at least one of said flow directors has a second angle of inclination in relation to said plane of said channel wall to which said downstream portion returns, andthe second angle of inclination is greater than the first angle of inclination; and a flat strip including a plurality of indentations, wherein the at least one channel is a plurality of channels with respective first and second flow directors, the plurality of channels being arranged on the flat strip such that the plurality of indentations fit with the respective first and second flow directors. |
