At the recently concluded SNEC, AUDIOWELL presented its liquid cooling system flow solution at Booth HC108-C109 in Hall 8.1, delivering accurate and reliable flow monitoring solutions for core PV cell manufacturing processes including wet etching, texturing, and cleaning. The exhibition, held grandly from June 3 to 5, 2026, at the Shanghai National Exhibition and Convention Center, brought together over 1,485 exhibitors from across the global PV industry chain.
In PV cell wet processes such as etching, texturing, and cleaning, the monitoring accuracy of flow rates for highly corrosive solutions—including hydrofluoric acid and nitric acid—directly determines process stability and production yield. To address challenges posed by bubbles, particulates, strong corrosiveness, and high cleanliness requirements, AUDIOWELL unveiled at the show a liquid cooling system flow solution that integrates vortex flow sensors and clamp-on ultrasonic flow sensors in a coordinated deployment. Each plays a distinct role while complementing the other, successfully covering full-link flow monitoring from main pipelines to branch terminals.
Vortex Flow Sensor: Safeguarding Total Flow Monitoring in Main Pipelines
In the complex fluid piping of PV wet processes, the vortex flow sensor, based on the Kármán vortex street effect, precisely measures flow by detecting the vortex frequency generated as fluid passes through a bluff body, combined with fluid dynamics modeling and signal processing technology. Its outstanding resistance to bubble and impurity interference enables stable, real-time flow measurement of acids, alkalis, and high-purity chemical solutions even in the presence of trace particulates or bubbles in the chemical bath. The modular compact design and low pressure loss effectively reduce the energy consumption of wet-process circulation pumps. With an instantaneous flow accuracy of ±3% F.S., it fully meets the basic flow stability requirements of process recipes. In the liquid cooling system, the vortex flowmeter is deployed on the main pipeline, taking on the task of stable total cooling fluid flow monitoring, ensuring overall stability and efficiency in fluid distribution to core process baths such as etching and texturing.
Clamp-on Flow Sensor: Excelling in Branch Distribution and Abnormal Alerts
In the chemical solution delivery branches of PV wet processes, the clamp-on flow sensor employs ultrasonic time-difference measurement technology. Two ultrasonic transducers continuously send ultrasonic waves toward the center of the pipe section and receive reflected echoes, calculating liquid velocity and flow rate in the pipe by measuring propagation time. It enables non-invasive, damage-free installation on the outer walls of various PVDF, PP, or PTFE pipes, completely avoiding direct contact with corrosive fluids. A single device can adapt to multiple chemical solutions and different pipe materials. More crucially, its abnormal alert function promptly signals risks such as flow deviation, branch blockage, or incompletely opened valves, ensuring that etching and texturing fluids are evenly distributed to each cell-carrying bath, thereby enabling reliable monitoring and predictive maintenance of wet-process equipment. In the liquid cooling system, clamp-on flow sensors are deployed on each branch to monitor cooling fluid flow in real time, ensuring uniform distribution of coolant to every process node.
Dual-Technology Synergy for Full-Link Precision Monitoring
The division of roles between the vortex flow sensor and the clamp-on flow sensor is clear and distinct: the vortex flowmeter handles total flow monitoring on the main pipeline, leveraging strong anti-interference capability and low pressure loss to ensure overall system stability; the clamp-on flow sensor extends into each branch, achieving refined distribution monitoring through non-contact, non-invasive installation and abnormal alert functions. Working in synergy, they form a complete flow monitoring loop from "main-line master control" to "branch fine-tuning"—monitoring only the total flow on the main line no longer suffices for high-precision process requirements; real-time branch flow monitoring is equally indispensable. With its dual-technology architecture combining ultrasonic and vortex principles, AUDIOWELL delivers a full-link flow solution for PV wet processes—from the main pipeline down to every single branch line.
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