Stability of gas pressure regulators

Abstract

Gas pressure regulators are widely used in both commercial and residential applications to control the operational pressure of the gas. One common problem in these systems is the tendency for the regulating apparatus to vibrate in an unstable manner during operation. These vibrations tend to cause an auditory hum in the unit, which may cause fatigue damage and failure if left unchecked. This work investigates the stability characteristics of a specific type of hardware and shows the cause of the vibration and possible design modifications that eliminate the unstable vibration modes. A dynamic model of a typical pressure regulator is developed, and a linearized model is then used to investigate the sensitivity of the most important governing parameters. The values of the design parameters are optimized using root locus techniques, and the design trade-offs are discussed.

PSO-RBF Neural Network PID Control Algorithm of Electric Gas Pressure Regulator

“…The basic principle of traditional pressure regulating is mechanical balance. The electric gas pressure regulating system range from simple single stage [22] to more complex multistage [23], and the principle of operation is the same in all [24,25]. The internal structure is shown in Figure 1.…”

EMR modelling of a hydrogen-based electrical energy storage

“…An isentropic process is assumed to describe the thermodynamical parameters in each body of the controller. The inlet and outlet variables (pressure, mass ow) are tuned by adjusting mechanical parameters according to the stability study in [36]. It can be found on the overall model as the "Pressure regulator" block (gure 6).…”

“…As it is noticed above, the pressure regulator of [36] is used. It can be tuned on any operating point by adjusting the mechanical set point.…”

“…The pressure controller model developed in [36] has been used. An isentropic process is assumed to describe the thermodynamical parameters in each body of the controller.…”

A Study of Virtual Training Platform for City Gas Governor

“…도시가스 정압설비는 가스공사 에서 공급하는 고압의 도시가스를 감압하여 사용자에 게 전달해 주는 기능을 하는 장치로서 실제로 크고 작 은 가스 안전사고들이 빈번하게 발생되고 있다. [6,7] 가스안전훈련 플랫폼을 구축하기 위해서 도시가스 정 압설비의 안전훈련 시스템을 이용해 VR 인터페이스의 활용의 적정성 및 범위 그리고 가스안전훈련에서 최 적의 안전훈련 플랫폼의 형태에 대해서 고찰하였다. …”