Prediction of blowdown of a pressure relief valve using response surface methodology and CFD techniques

Abstract

In this study, parametric assessment of the main geometric design features of a pressure relief valve (PRV) with a backpressure chamber and two adjusting rings was conducted using a response surface methodology. This design approach was established by using computational fluid dynamics (CFD) to model the dynamic performance of the opening and closing of a nuclear power main steam pressure relief valve (NPMS PRV). An experimental facility was established to test the NPMS PRV in accordance with the standard ASME PTC 25, and to validate the CFD model. It was found that the model can accurately simulate the dynamic performance of the NPMS PRV; the difference in blowdown between the simulation and experiment results is found to be below 0.6%. Thus, the model can be used as part of a design analysis tool. The backpressure chamber assisted in the reseating and decreased the blowdown of the NPMS PRV from 18.13% to 5.50%. The sensitivity to valve geometry was investigated, and an explicit relationship between blowdown and valve geometry was established (with a relative error less than 1%) using the response surface methodology; this will allow designers to assess the valve settings without the need for a CFD model.

Evaporation characteristics and efficient working area of multi-stage high pressure and temperature reducing valve

“…According to the numerical simulation model established in reference [14][15], the RNG k-ε turbulence model of CFX is selected to solve the three-dimensional flow field of MSHPTRV. The flow field is two-phase flow of steam and water, and the mixture of steam and water belongs to pure substance.…”

“…The suitability of the RNG k-ε turbulence model for MSHPRV has been verified in references [14][15], but the evaporation model with water spraying is the first time to be used in the simulation of MSHPTRV, so it is necessary to verify the accuracy of evaporation model. Based on the original experimental platform of 50kW steam turbine with oil burning boiler, as shown in figure 2, the DN10 pressure and temperature reducing valve is installed in the bypass system.…”

“…The temperature and pressure characteristics under different valve openings were presented and the application of MSHPRV in hydrogen refueling station was validated [13]. Zhang et al modeled the dynamic performance of the opening and closing of PRV (pressure relief valve) by CFD [14]. Analysis from flow field, the throttling components of high pressure reducing valve have great effects on the control performances.…”

Optimization of an effective quick coupling valve for pressurized irrigation*

“…Additionally, Zhang et al . (2018) evaluated the properties of the geometry of a pressure gun with a back pressure chamber. In another study, Lisowski et al .…”

Fluid-Structure Interaction Simulation of Excess Flow Valve Movement at Different Operating Pressures and Gas Flow Rates

“…With this method, they could predict qualitative agreement with experimental observation. Zhang et al (2018) used a CFD simulation with response surface methodology for investigating the pressure relief valve. They compared the results with the experimental performance tests and obtained good predictions.…”