As a key component in the hydrogen energy system, the accuracy and stability of hydrogen ejector flow control play a vital role in the performance of the entire system.
First, common hydrogen ejector flow control strategies include pressure-based control. By monitoring the pressure of the hydrogen supply pipeline and using the pressure sensor feedback signal, the parameters such as the ejector opening or driving voltage are adjusted to achieve flow control. However, this method may lead to a decrease in flow control accuracy when the pressure fluctuates greatly.
Secondly, the pulse width modulation (PWM) control strategy is also widely used. By quickly opening and closing the ejector and adjusting the ratio of the opening time to the closing time, that is, the duty cycle, the average flow of hydrogen is controlled. However, this method may cause problems such as mechanical wear and electromagnetic interference of the ejector.
In order to optimize the flow control of hydrogen ejector, one method is to use intelligent algorithms. For example, fuzzy logic control can comprehensively judge and output appropriate control signals based on multiple input variables, such as pressure, temperature, system demand flow, etc. Fuzzy logic control does not require precise mathematical models, can adapt well to complex and changeable working conditions, and effectively improve the accuracy and adaptability of flow control.
In addition, optimizing the structure of hydrogen ejector is also a way to improve flow control. For example, improving the nozzle design of the ejector to make its internal flow channel smoother and reduce flow resistance, so as to achieve more stable and accurate flow output under the same driving conditions.
Furthermore, the control strategy of multi-ejector collaboration is worth exploring. According to the different working conditions of the system, the workload of multiple ejectors is reasonably allocated to achieve graded flow control, which can not only meet the efficient supply when large flow demand is required, but also ensure accurate control when small flow demand is required.
In practical applications, the physical properties of hydrogen and the overall characteristics of the supply system need to be considered. For example, the influence of factors such as hydrogen purity and humidity on the ejector flow, and the flow control is optimized through corresponding pretreatment or compensation measures.
In short, the flow control strategy and optimization method of hydrogen ejector need to consider multiple factors comprehensively. Only through continuous technological innovation and improvement can more efficient, accurate and stable hydrogen flow control be achieved, and the wide application of hydrogen energy technology in various fields can be promoted.
