Laser welding machines help improve the thermal conductivity efficiency of solar collectors.
2020-05-25
Any device that uses solar energy as a driving force requires solar heat absorption plates, also known as collectors. They are widely used in water heaters, solar stoves, solar dryers, and various solar-powered devices. The role of the collector is to concentrate dispersed solar radiation energy. Therefore, to improve its thermal conductivity efficiency, efforts must be made at the welding joints to ensure faster thermal efficiency and more concentrated energy, allowing for the absorption and transmission of more external energy in the same amount of time. Below, we will conduct a comparative analysis of the welding types for solar collectors.
Currently, the main welding equipment for solar collectors includes ultrasonic and laser welding (the latter has been widely applied and is a new type of equipment that will fully replace ultrasonic welding in the future).
Ultrasonic welding utilizes mechanical vibration energy at ultrasonic frequencies (over 16KHz) under pressure conditions, causing two metal surfaces to rub against each other and form a molecular layer of interdiffusion, which is close to cold processing.
Laser welding uses high-energy laser pulses for localized heating in small areas of the material. The energy diffuses into the material through thermal conduction, melting the material to form a specific molten pool for welding purposes, which belongs to thermal processing.
Laser welding is a non-contact welding method that does not require external pressure on the welded workpieces, thus better protecting the original shape and physical properties of the workpieces and maintaining the integrity of their surface coatings.
The impact of welding processes on the thermal conductivity efficiency of collectors.
The quality of flat solar product performance can be directly judged by the heating efficiency of the water tank. The heating efficiency of the water tank is influenced by a series of factors, with the heat absorption plate being the most significant. Using laser welding to weld the flow channels of the solar collector core and the high-selectivity heat absorption coating, welding a point every few millimeters on the heat absorption coating, results in high bonding strength and integrity of the heat absorption coating, thereby enhancing the heat absorption efficiency of the core.
Today, the issue of global warming is becoming increasingly serious, and energy supply is becoming tighter. Efficient development and utilization of solar energy is urgent. To adapt to the rapid development of the solar collector industry market, many manufacturers have developed their own brand fiber laser welding machines. More advanced welding processes will further enhance the thermal conductivity efficiency of solar collectors. Currently, these fiber laser welding machines have captured a large portion of the solar collector welding market. The rapid development of fiber transmission laser welding machines has also driven the development of the laser equipment cooling industry.
Welding solar collectors with laser welding machines requires selecting suitable equipment. Not all laser devices can weld collectors; it is necessary to find manufacturers with welding experience, high welding process technology levels, and good hardware and software systems to better solve such welding process challenges, which is beneficial for saving users' welding costs and improving speed and production efficiency.
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Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.
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