Inner Grooved Tube

What is the specific effect of the rib design of the inner grooved tube on the heat transfer performance

The basic principle of the rib design of the inner grooved tube
As the name suggests, the inner grooved tube is a copper tube with a regular rib structure made on the inner wall of the pipe through a certain process. The main function of the rib is to increase the heat transfer area in the tube and stimulate the turbulent state of the fluid, thereby significantly improving the heat exchange efficiency. The parameters of the rib design mainly include rib height, rib spacing, rib angle and rib shape, which directly affect the fluid flow characteristics and heat exchange effect.
Zhejiang Jingliang has a complete R&D and manufacturing system that can accurately control the microstructure of the ribs. The company uses its independently developed high-precision extrusion and finishing technology to achieve the best match of rib height and spacing, ensuring that each inner grooved tube meets the strict standards of efficient heat exchange.
The specific effect of rib design on heat transfer performance
Increase the heat transfer area and improve the heat exchange efficiency
The most direct effect of the rib is to increase the inner surface area of ​​the copper tube. The raised structure of the inner rib expands the contact area between the tube wall and the fluid, transferring more heat per unit length. Zhejiang Jingliang optimizes the rib geometry to increase the heat transfer area ratio and ensure that the refrigerant or other media can fully absorb or release heat in the tube.
Promote fluid turbulence and improve heat transfer conditions
The fluid flow in smooth tubes is mostly laminar or critical flow, and the heat transfer efficiency is limited. The rib design of the inner grooved tube can destroy the laminar state of the fluid, induce turbulence, and significantly improve the heat transfer coefficient. Based on fluid mechanics simulation, Zhejiang Jingliang's R&D team repeatedly optimizes the rib angle and rib shape to achieve the best turbulence intensity when the fluid passes through the pipeline and reduce the heat transfer resistance.
Reduce scaling and extend equipment life
When the rib design is reasonable, it can effectively reduce the stagnation of the fluid on the tube wall, reduce the risk of scaling and deposition, and ensure long-term stability of heat exchange performance. Zhejiang Jingliang pays special attention to the uniformity and streamline of the rib spacing during design, reduces dead corners and eddy areas, ensures that the equipment maintenance cycle is extended, and improves the economic efficiency of customer use.
Control flow resistance and balance pressure loss
Although ribs can improve heat transfer, overly intense rib design may increase fluid resistance, bring about large pressure loss, and affect the overall efficiency of the system. Zhejiang Jingliang relies on many years of production experience, combined with advanced numerical simulation technology, to adjust the rib parameters, achieve a balance between heat transfer and pressure loss, and meet the needs of different application scenarios.

What are the welding technologies and connection methods of inner grooved tubes?

Industry background and challenges of inner grooved tube welding technology
Due to its unique internal rib structure, the inner grooved tube can significantly improve the turbulence and heat exchange efficiency of the fluid in the tube. However, it is this kind of complex inner surface structure that also puts higher requirements on the welding process. Welding, as a key process link in the connection of inner grooved tubes, is not only related to the sealing and mechanical strength of the pipeline, but also directly affects the overall operating stability and service life of the system.
Since its establishment in 1994, Zhejiang Jingliang Copper-Tube Products Co., Ltd has focused on the research and development and manufacturing of copper tube products. It has a complete industrial chain of smelting, extrusion, drawing, finishing rolling, annealing, etc., which ensures the high quality of the basic materials of the inner grooved tube and provides a solid foundation for the stability of the welding process.
Main types of welding technologies for inner grooved tubes
Argon arc welding (TIG welding)
Argon arc welding is widely used in the connection of internal rib copper tubes because of its controllable welding heat input, high weld quality and wide range of application. Zhejiang Jingliang uses automated argon arc welding equipment to ensure uniformity and defect-free welds, which is particularly suitable for the connection of condenser and evaporator copper tubes in refrigeration systems.
Brazing (solder connection)
Brazing technology achieves copper tube connection at a lower temperature, which can effectively protect the inner rib structure from being damaged. Zhejiang Jingliang selects silver-based or copper-based brazing filler metals according to different pipe diameters and use environments to ensure the sealing and corrosion resistance of the connection parts, and is widely used in the assembly process of air conditioning and refrigeration equipment.
Laser welding
As a high-end welding technology, laser welding has the advantages of high energy density, small heat-affected zone, and narrow welds. Zhejiang Jingliang is introducing intelligent laser welding equipment to improve the welding efficiency and quality of inner grooved tubes to meet the stringent requirements of high-end customers for product performance.
Resistance welding
Resistance welding uses resistance heat as a heat source, has a fast welding speed, stable process, and is suitable for mass production. Relying on its strong production capacity and technical advantages, Zhejiang Jingliang uses resistance welding technology to achieve fast and efficient connection of inner grooved tubes.
Professional application of inner grooved tube connection methods
The connection method of the inner grooved tube directly affects the overall installation efficiency and performance of the heat exchanger. Zhejiang Jingliang provides a variety of connection solutions according to specific applications and design requirements:
Direct welding connection
Direct welding connection is suitable for piping systems that require high strength and good sealing. Zhejiang Jingliang's inner grooved tubes are strictly controlled by welding process to ensure that there is no leakage at the connection, and are often used for the assembly of condenser and evaporator copper tubes.
Flange connection
Flange connection is easy to disassemble and maintain, suitable for large equipment and systems. Zhejiang Jingliang ensures the tightness and welding quality between the inner grooved tube and the flange through precise processing to meet the use requirements of high-pressure systems.
Quick connection
In response to the needs of modern rapid assembly, Zhejiang Jingliang has developed and provided a variety of standardized quick-connect connectors, which are used in air conditioning and refrigeration systems with inner grooved tubes, significantly shortening the installation cycle and improving on-site construction efficiency.
Combination of welding and mechanical connection
In some special environments, Zhejiang Jingliang can provide a hybrid connection method combining welding and mechanical connection according to customer needs to achieve structural stability and easy maintenance.