Multifunctional bypass valve for water management and surge protection in a proton-exchange membrane fuel cell supply-air system

Vu, Hoang Nghia; Tri, Dat Truong Le; Nguyen, Huu Linh; Kim, Younghyeon; Yu, Sangseok

doi:10.1016/j.energy.2023.127696

Cited by 11 publications

(6 citation statements)

References 51 publications

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“…This strategy addresses a critical oversight in the air supply system, specifically the issue of a surge, which, if left unattended, poses the risk of damaging both the compressor and stack. Vu et al [167] investigated the application of a multifunctional valve in a fuel cell system, positioned downstream of the compressor, to regulate the cathode air characteristics under varying loads and configurations; the study also addressed the delicate balance between surge protection and stack performance during transient conditions, presenting an optimal valve opening for throttle flow.…”

Section: Innovative Applicationsmentioning

confidence: 99%

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

Cravero,

Marsano

2024

Energies

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Centrifugal compressors are widely used in different fields. Their design requires high performance and a wide operating range, where, at lower mass flow rates, unstable flow dynamic phenomena occur, which are extremely harmful and, at the same time, complex to fully understand. This review paper presents the main research from the last 40 years on the subject of instability in centrifugal compressors, aiming to clarify the main (sometimes contradictory) causes, classifying them according to the component in which they are triggered or the interaction between them. Importance is given to works that develop criteria for the identification of the stability limit with simplified models. The main techniques used to extend the stability limit are also presented by distinguishing between passive and active fixed-flow control methods; moreover, the main works on variable geometry techniques are reported, showing the advantages and disadvantages of their use. Finally, an overview of the innovative applications of centrifugal compressors, such as fuel cells, is presented. The aim of this review is to highlight the continued interest in this field of study and provide the tools to understand the different unstable mechanisms and techniques used to extend the operating limit.

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Section: Innovative Applicationsmentioning

confidence: 99%

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

Cravero,

Marsano

2024

Energies

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Section: Pressure Control Of Adsmentioning

confidence: 99%

“…The corresponding output is sent to the actuator to realize the ADS's accurate supply pressure control. In addition to the control strategy, Vu et al [80] effectively controlled the air supply pressure and alleviated the air compressor surge by installing a multi-function, four-way valve on the oxygen transport pipeline. The coupling of OER and pressure in the ADS makes it difficult to achieve accurate, independent OER and pressure control, which can be effectively solved by using the decoupling strategies and realizing the high-precision independent control of OER and pressure [81,82].…”

Section: Pressure Control Of Adsmentioning

confidence: 99%

Research Progress on Gas Supply System of Proton Exchange Membrane Fuel Cells

Cheng,

Wu,

Mou

et al. 2024

Processes

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Proton exchange membrane fuel cells (PEMFCs) are attracting attention for their green, energy-saving, and high-efficiency advantages, becoming one of the future development trends of renewable energy utilization. However, there are still deficiencies in the gas supply system control strategy that plays a crucial role in PEMFCs, which limits the rapid development and application of PEMFCs. This paper provides a comprehensive and in-depth review of the PEMFC air delivery system (ADS) and hydrogen delivery system (HDS) operations. For the ADS, the advantages and disadvantages of the oxygen excess ratio (OER), oxygen pressure, and their decoupling control strategies are systematically described by the following three aspects: single control, hybrid control, and intelligent algorithm control. Additionally, the optimization strategies of the flow field or flow channel for oxygen supply speeds and distribution uniformity are compared and analyzed. For the HDS, a systematic review of hydrogen recirculation control strategies, purge strategies, and hydrogen flow control strategies is conducted. These strategies contribute a lot to improving hydrogen utilization rates. Furthermore, hydrogen supply pressure is summarized from the aspects of hybrid control and intelligent algorithm control. It is hoped to provide guidance or a reference for research on the HDS as well as the ADS control strategy and optimization strategy.

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“…Notably, components such as air supply and moisture control significantly impact the dynamic performance of fuel cells. By optimizing these components, the entire system's performance can be elevated [24][25][26]. In addition, the relatively slow operating speed of the fuel supply system, compared to the electrochemical reaction, can cause the degradation of the membrane of the fuel cell during sudden load changes.…”

Section: Motivation and Noveltymentioning

confidence: 99%

Power Management Strategy of Hybrid Fuel Cell Drones for Flight Performance Improvement Based on Various Algorithms

Hyun,

Han,

Hong

2023

Energies

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In recent years, there has been a growing demand for multipurpose drones that can handle surveillance, environmental monitoring, and urgent deliveries. This trend has spurred the need for increased power and longer flight times for drones. Hence, many researchers introduced various hybrid systems to enhance endurance. In particular, a hybrid system that integrates solar cells, fuel cells, and batteries can substantially enhance a drone’s endurance. However, linking multiple power sources necessitates a control strategy that prioritizes safety and durability. It is also essential to analyze the control characteristics of each component as the dynamic behavior of individual components, coupled with environmental factors, significantly impacts the overall dynamic characteristics of drone systems. This study introduces a PEMFC–battery drone model. The model’s dynamic characteristics can be evaluated based on changes in environmental conditions and the control strategies of primary components. The validity of this model is confirmed by analyzing the dynamic characteristics of drone systems. As a result, the MRAC logic applied to the flight-level control and thrust motor of the drone was found to amplify the characteristics of the underlying PI and IP controllers. These control characteristics can lead to the development of control strategies for improving the flight performance or power durability of the aircraft by being properly applied to the flight environment of the drone.

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Multifunctional bypass valve for water management and surge protection in a proton-exchange membrane fuel cell supply-air system

Cited by 11 publications

References 51 publications

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review

Research Progress on Gas Supply System of Proton Exchange Membrane Fuel Cells

Power Management Strategy of Hybrid Fuel Cell Drones for Flight Performance Improvement Based on Various Algorithms

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