Printed circuit board heat exchanger core with slotted spindle-shaped fins
A printed circuit board, spindle-shaped technology, applied in the field of high-efficiency, low-resistance compact heat exchangers, can solve the problems of increasing local flow resistance, etc., and achieve the effects of enhancing disturbance, inhibiting flow separation, and reducing the flow field velocity gradient
Pending Publication Date: 2022-04-15
XI AN JIAOTONG UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Under the same heat transfer conditions, the pressure drop of the airfoil fin PCHE is only 1 / 20 of that of the zigzag channel PCHE, but the stagnation of the flow at the leading edge of the airfoil fin will increase the local flow resistance, and further modification of the fin shape is required. Optimized to reduce flow resistance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0024] figure 1 Shown is a core structure of a slotted spindle-fin printed circuit board heat exchanger. The core 1 is formed by stacking cold-side heat exchange plates 3 and hot-side heat exchange plates 2 . A number of slotted spindle-shaped fins 4 are etched on the cold-side heat exchange plate 3 and the hot-side heat exchange plate 2 by photochemical etching. The space between the cold-side heat exchange plate 3 and the hot-side heat exchange plates 2 on both sides respectively forms a cold fluid channel 5 and a hot fluid channel 6 for flow and heat transfer of cold and hot fluids.
[0025] figure 2 Shown is a front view of the core body of a slotted spindle fin printed circuit board heat exchanger, the thickness t of the hot side heat exchange plate 2 and the cold side heat exchange plate 3 is 1.0-3.0mm, the cold fluid channel 5 and the heat exchange ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a grooved spindle-shaped fin printed circuit board heat exchanger core which is formed by stacking heat exchange plates, the heat exchange plates comprise a cold side heat exchange plate and hot side heat exchange plates located on the two sides of the cold side heat exchange plate, and a plurality of grooved spindle-shaped fins are etched on the heat exchange plates through a photochemical etching method. The slotted spindle-shaped fins are discontinuous symmetrical fins, and a cold fluid channel and a hot fluid channel are formed in the space between the cold side heat exchange plate and the hot side heat exchange plates on the two sides and used for flowing and heat transfer of cold fluid and hot fluid. The slotted fusiform fin fluid channel provided by the invention has the following advantages that firstly, flow separation can be inhibited, the normal impact of the front edge of the fin is eliminated, and the flow resistance is effectively reduced; secondly, the discontinuous fins can destroy development of a boundary layer and strengthen heat transfer; and thirdly, the fin grooves can increase the heat exchange area and improve the compactness of the heat exchanger. Through numerical simulation, compared with a wing-shaped fin PCHE with the same geometric parameters, the wing-shaped fin has the advantage that the pressure drop per unit length is reduced by 9.2%-11.3%.
Description
technical field [0001] The invention belongs to the field of high-efficiency and low-resistance compact heat exchangers, and in particular relates to a core body of a printed circuit board heat exchanger with slotted spindle-shaped fins. Background technique [0002] Printed circuit heat exchanger (PCHE, printed circuit heat exchanger) belongs to the category of microchannel plate heat exchanger, its millimeter-scale fluid channel is formed on the metal plate by photochemical etching technology, and the core of the heat exchanger is formed by diffusion welding Technology combines heat exchange plates to form. PCHE has the advantages of high temperature and high pressure resistance, compact structure, and high heat exchanger efficiency. It is suitable for supercritical carbon dioxide Brayton cycle systems, ultra-high temperature gas-cooled reactors, and sodium-cooled reactors. [0003] PCHE fins can be divided into two categories: continuous fins and discontinuous fins. Con...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F28D9/00F28F3/04
CPCF28D9/0037F28F3/044F28F2215/04
Inventor 车得福靳万龙王利民邓磊
Owner XI AN JIAOTONG UNIV