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http://dx.doi.org/10.7842/kigas.2021.25.5.37

A Study on the Pressure Control Process of Gas Regulators through Numerical Analysis  

Jung, Jun-Hwan (Dept. of Research&Development, SHINHWA HI-TEC Co.,Ltd.)
Nam, Chung-Woo (Hydrogen Storage and Fuelling R&D Center, Korea Automotive Technology Institute)
Kim, Min-Kyung (Dept. of Research&Development, SHINHWA HI-TEC Co.,Ltd.)
Publication Information
Journal of the Korean Institute of Gas / v.25, no.5, 2021 , pp. 37-51 More about this Journal
Abstract
The pressure drop phenomenon that occurs when the same flow rate is supplied to the gas regulator was analyzed. The regulator moves the position of the piston through the interaction of the force acting on the upper and lower parts of the piston and the spring tension to release the pressure of a specific range in a specific environment as constant pressure, thereby maintaining the pressure. The flow characteristics and pressure control process of the regulator were investigated through a numerical analysis technique as the volume of the fluid inside the regulator changed. As the gap between the piston and the piston seat decreased, the pressure drop increased and the flow velocity increased. It was verified through numerical analysis that the piston was positioned at 0.12mm under the same conditions as the pressure-flow test (inlet pressure 3MPa, outlet pressure 0.8MPa, flow rate 70kg/h).
Keywords
regulator; gas supply; pressure drop; force balance; numerical analysis; compressible flow;
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