Fin type heat exchanger of gas-liquid partition wall pipes with pin ribs

A fin heat exchanger and needle fin technology, which is applied in the field of strengthening heat exchange and heat exchangers, can solve the problems of high flow resistance, high pump power, large flow resistance, etc., to achieve enhanced heat transfer, high compactness, Material saving effect

Inactive Publication Date: 2006-04-19
TSINGHUA UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The heat transfer efficiency and flow resistance of the pin-fin structure are higher than those of the louvers and staggered fin structures. At present, it is mainly used in equipment that requires large-scale and high-efficiency heat transfer, such as cooling of turbine tail blades, electronic equipment, and aerospace. field, but it is not used in various types of automotive heat exchangers, the main reason is that it requires high pump power due to its large 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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fin type heat exchanger of gas-liquid partition wall pipes with pin ribs
  • Fin type heat exchanger of gas-liquid partition wall pipes with pin ribs
  • Fin type heat exchanger of gas-liquid partition wall pipes with pin ribs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Figure 6 ~ Figure 8 It is a schematic diagram of a periodic unit structure of a tube-fin heat exchanger with cylindrical pin fins, followed by Figure 1 ~ Figure 4 It can be seen from comparison that it replaces the louver fins with cylindrical pin fins on the basis of the existing structure of the tube-belt heat exchanger, and connects them between the walls of the liquid tubes. Every 4 ribs are arranged in a group, and each group is arranged in a staggered manner. According to the length of the gas flow direction, 7 and a half groups are arranged, and the number of pin ribs is 30. according to figure 2 The geometric parameters shown are respectively: d=0.2mm, Fp=1.0mm, S1=S2=0.4mm, S3=0.5mm, flow direction length Fd=17mm.

[0034] The simulation is carried out with water and air, and the simulation results of its flow resistance and air-side heat transfer coefficient are listed in Table 2 and Table 3, corresponding to PF in Table 2 and Table 3 1 structure. It ca...

Embodiment 2

[0036] Figure 9It is a schematic diagram of a periodic unit structure of a tube-fin heat exchanger with regular hexagonal prism pin fins, similar to Example 1, which replaces the louver fins with regular hexagons on the basis of the existing structure of the tube-belt heat exchanger The prism pin fins are connected between the walls of the liquid pipe. Every 4 ribs are arranged in a group, and each group is arranged in a dislocation, and 7 groups are arranged according to the length of the gas flow direction, and the number of pin ribs is 28. according to Figure 5 The geometric parameters shown are: side length S=0.11mm, Fp=1.2mm, S1=0.4mm, S2=0.8mm, S3=0.5mm, Fd=17mm.

[0037] The simulation is carried out with water and air, and the simulation results of its flow resistance and air-side heat transfer coefficient are listed in Table 2 and Table 3, corresponding to PF in Table 2 and Table 3 2 structure. The results show that the air side heat transfer coefficient h of th...

Embodiment 3

[0039] Figure 10 It is a schematic diagram of a periodic unit structure of a tube-fin heat exchanger with regular octagonal prism pin fins, similar to Example 1, which replaces the louver fins with regular octagonal prism pin fins on the basis of the existing structure of the heat exchanger , connected between the walls of the liquid pipe. Every 4 ribs are arranged in a group, and each group is arranged in a dislocation, and 7 groups are arranged according to the length of the gas flow direction, and the number of pin ribs is 28. according to Figure 5 The geometric parameters shown are: side length S=0.1mm (area about 0.0314mm2), F p =1.0mm, S1=0.4mm, S2=0.8mm, S3=0.5mm, F d =17mm.

[0040] The simulation is carried out with water and air, and the simulation results of its flow resistance and air-side heat transfer coefficient are listed in Table 2 and Table 3, corresponding to PF in Table 2 and Table 3 3 structure. , the results show that the air side heat transfer co...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

A fin heat exchange of gas ¿C liquid recuperative tube type with pin rib is featured as setting cylindrical or prismatic pin rib at gas side of said heat exchanger to replace flat board fin , dislocated fin and louver fin , welding two ends of pin rib on outer wall of liquid tube to let it be vertical to wall surface axially and to let it be arranged cyclically along liquid flow direction , arranging pin rib in each cycle with two modes of sequential arrangement and dislocated arrangement as several pieces of pin rib being set as a group being set in dislocated arrangement to each other , using 0.1 ¿C 0.25 mm as diameter of cylindrical pin rib and 0.1 ¿C 0.25 mm as sectional edge length of prismatic pin rib .

Description

technical field [0001] A gas-liquid partition wall tube-fin heat exchanger with needle fins belongs to the technical field of enhanced heat exchange and heat exchangers. Background technique [0002] Compact heat exchangers are light in weight and high in heat transfer efficiency, and are widely used in many industrial fields such as petroleum, chemical industry, automobiles, trains, ships, power generation equipment, air separation equipment, and air conditioning equipment. Compact heat exchangers usually have plate-fin type, tube-fin type and tube-belt type. In the plate-fin heat exchanger, the hot and cold heat transfer medium is separated by a metal plate; in the tube-fin radiator, the cold and hot heat transfer medium is separated by a metal pipe, and the outer wall of the pipe is covered with fins, such as pin ribs, annular ribs, flat fins, etc. Straight ribs etc. [0003] The original heat exchanger fins were smooth planes (straight fins), known as the primary surfa...

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
no application Login to view more
IPC IPC(8): F28F1/12F28F13/06
Inventor 梁新刚任效明
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap