Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 Issue 1 (Special Issue) 2021 03 21 Experimental Investigation of Water Level Control System of Liquid-Gas Separator in the Fuel Cell Experimental Investigation of Water Level Control System of Liquid-Gas Separator in the Fuel Cell 589 604 3673 10.22060/mej.2019.16127.6281 FA Ahmadreza Shojaei Babol (Noshirvani) University of Technology Seyyed Majid Rahgoshay Malek Ashtar University of Technology, Tehran, Iran 0000-0002-6484-6190 Mazaher Rahimi Esboee Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fereydounkenar, Iran. Amirhossein Pahnabi Malek Ashtar University of Technology Kamal Mohammadi Malek Ashtar University of Technology Journal Article 2019 04 14 <strong>Water is the product of the interaction between reactants in the fuel cell. The purpose of this study is to introduce a water level control system that prevents the loss of reactant gases by improving the process of water separation from these gases. In this paper, due to fuel cell characteristics and construction constraints, the performance of a venturi-based flow control system is quantified. Effective parameters for controlling the discharge valve, such as the length of the connection path, the angle of the sensor, the time lags, have been investigated.</strong><strong> The path length check showed that if the path length being too high, the pressure changes oscillate, failing to establish a pressure condition for the </strong><strong>minimum critical time</strong><strong>, and the system loses its performance. Finally, in order to control the water level control system automatically, relations are proposed based on the pressure. The performance of the fuel cell has been investigated at 0.4 to 2 bar and the system is efficient in this range.</strong><strong> The sensor angle only affects</strong><strong> the maximum critical time</strong><strong>, somehow reaches its maximum by placing the sensor at the 90-degree angle. In addition, according to the tests performed, the time between 0.3 and 0.5 seconds is recommended for</strong><strong>the </strong><strong>minimum critical time</strong><strong>.</strong> <strong>Water is the product of the interaction between reactants in the fuel cell. The purpose of this study is to introduce a water level control system that prevents the loss of reactant gases by improving the process of water separation from these gases. In this paper, due to fuel cell characteristics and construction constraints, the performance of a venturi-based flow control system is quantified. Effective parameters for controlling the discharge valve, such as the length of the connection path, the angle of the sensor, the time lags, have been investigated.</strong><strong> The path length check showed that if the path length being too high, the pressure changes oscillate, failing to establish a pressure condition for the </strong><strong>minimum critical time</strong><strong>, and the system loses its performance. Finally, in order to control the water level control system automatically, relations are proposed based on the pressure. The performance of the fuel cell has been investigated at 0.4 to 2 bar and the system is efficient in this range.</strong><strong> The sensor angle only affects</strong><strong> the maximum critical time</strong><strong>, somehow reaches its maximum by placing the sensor at the 90-degree angle. In addition, according to the tests performed, the time between 0.3 and 0.5 seconds is recommended for</strong><strong>the </strong><strong>minimum critical time</strong><strong>.</strong> https://mej.aut.ac.ir/article_3673_740a02d0786a4239a62076f650cd26da.pdf