en.Wedoany.com Reported - In the field of Concentrated Solar Power (CSP), high-temperature molten salt serves as both a heat transfer and thermal storage medium. The accuracy and safety of its flow measurement directly impact the stable operation of the system. Emerson's Flexim has introduced a clamp-on ultrasonic flowmeter, which, with its WaveInjector® device, extends the measurement temperature range from -200°C to 630°C, offering a new solution for non-invasive measurement.

CSP technology converts solar energy into thermal energy through a concentrating solar collector system, which then drives a steam turbine generator to produce electricity. Its technical routes include tower, parabolic trough, linear Fresnel, and dish systems. Due to its high boiling point, low viscosity, and low vapor pressure, molten salt operates within a temperature range of 290–560°C, making it an ideal heat transfer medium. Real-time and precise molten salt flow measurement helps ensure stable fluid conditions and prevents system failures caused by fluctuations.

Traditional inline high-temperature molten salt flowmeters face challenges such as installation welding, leakage risks, and complex maintenance. Flexim's WaveInjector device achieves thermal separation between the sensor and the pipe through a metallic coupling plate, keeping the clamp temperature within the operating range of the ultrasonic sensor. This enables clamp-on installation without the need for pipe cutting, welding, or flaw detection. The device features a purely mechanical structure, can be used in potentially explosive areas, and measuring from outside the pipe avoids sensor wear and leakage risks.

Flexim's clamp-on ultrasonic flowmeter has gradually become a standard technology in multiple CSP projects in China. It achieves an accuracy of ±0.5%, repeatability of ±0.15%, and a minimum flow velocity of 0.01m/s, adapting well to low-load conditions. The probes are fully insulated with no risk of coking and utilize solid-state coupling for maintenance-free operation. The product series also includes SIL-certified models, covering high-temperature liquid flow measurement for pipes ranging from DN30 to DN1000.

Compared to traditional inline high-temperature molten salt flowmeters, the Flexim solution offers advantages in installation, maintenance, safety, and cost-effectiveness. Emerson states that wherever there is flow, Flexim can provide a measurement solution.

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