What is the pressure bearing capacity of a large cross-section multi-channel folding tube
Information summary：The pressure bearing capacity of large cross-section multi-channel folding tubes has no fixed value and is affected by factors such as material, wall thickness, and channel design. Taking this type of folding tube commonly used in heat exchange scenarios as an example, its experimental burst pressure was measured to be 21.9MPa. After optimizing the structure, the pressure bearing capacity can be f
The pressure bearing capacity of large cross-section multi-channel folding tubes has no fixed value and is affected by factors such as material, wall thickness, and channel design. Taking this type of folding tube commonly used in heat exchange scenarios as an example, its experimental burst pressure was measured to be 21.9MPa. After optimizing the structure, the pressure bearing capacity can be further improved, and it is suitable for most conventional industrial heat exchange and cooling scenarios as a whole. The following is a specific analysis:
1. Basic pressure bearing level and experimental data: As a commonly used pipe material for parallel flow condensers and other components, it has been proven to have good ultimate pressure bearing capacity. A study has verified through simulation and experiment that the measured bursting pressure of a certain folding tube reaches 21.9MPa, and the simulation results are highly consistent with the experimental results. A new type of microchannel folding tube with inserted fins and dual pieces has increased the maximum pressure resistance value by 30% compared to ordinary microchannel tubes, while reducing the volume by 35%, balancing pressure performance and structural compactness.
2. Core influencing factors
Wall thickness parameter: This is a key factor affecting pressure bearing. The simulation results show that the new folding tube with an inner wall thickness of 0.08mm and an outer wall thickness of 0.2mm has good comprehensive performance. According to the Barrow formula related to steel pipe pressure, under the condition of unchanged material and outer diameter, the pressure bearing capacity is basically proportional to the wall thickness. A small increase in wall thickness can significantly improve the ability of folding pipes to resist internal pressure.
Channel design: The number and layout of channels will change the distribution of pipeline forces. For example, the folding tube with the above performance is designed with a 19 hole structure, and a reasonable number of flow channels can avoid local stress concentration, allowing pressure to be evenly distributed on the tube wall and flow channel partition, reducing the pressure short plate caused by uneven force distribution. On the contrary, if the flow channel arrangement is chaotic or the quantity is unreasonable, it is easy to cause local pressure to be too high and reduce the overall pressure upper limit.
Pipe material: Its commonly used materials are mostly metal materials suitable for heat exchange scenarios, and the yield strength and tensile strength of the material directly determine the pressure bearing foundation. For example, when using high-strength aluminum alloy or stainless steel materials, the materials themselves can withstand greater stress, and the overall burst pressure and allowable pressure of the folding tube will be significantly higher than those of ordinary low-carbon steel materials; And the material with optimized microstructure through heat treatment can further enhance toughness and compressive strength, avoiding brittle fracture under pressure.
3. Pressure bearing adaptability in practical applications: The pressure bearing capacity of this pipe material meets the pressure requirements of its mainstream application scenarios. In scenarios such as car radiators, new energy vehicle battery cooling plates, and commercial air conditioning condensers, fluid pressure is often in a relatively low stable range, far below its burst pressure. Even in more complex scenarios such as engineering machinery cooling systems and power plant cooling systems, their pressure bearing capacity can meet the pressure requirements of cooling medium circulation. At the same time, the multi channel structure can improve heat transfer efficiency while ensuring pressure bearing, adapting to the comprehensive performance requirements of the industry for pipes.
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