Investigation on the power loss and radial force characteristics of pump as turbine under gas–liquid two-phase condition

Shi Fengxia,Miao Senchun,Wang Xiaohui,Yang Junhu

doi:10.1177/1687814019843732

Abstract

To study the power loss and radial force characteristics of pump as hydraulic turbine (PAT) under gas–liquid two-phase condition, a single-stage centrifugal pump in reverse mode as turbine was adop...

Highlights

As a key energy saving technique, an energy recovery device for high pressure fluids, the reverse rotating centrifugal pump as hydraulic turbine (PAT) is widely applied in the industries.[1,2,3,4,5] When the pump as turbine recycles chemical fluids, a certain amount of gas mixing is inevitably contained in the high pressure fluids
For the cases of gas fraction more than ak = 0.1, the distributions are inclined to regular and the power loss is decreasing with the rise of gas volume fraction
It can be concluded that there are not distinct patterns for the cases of large and small flow rates, the maximum radial force fluctuation usually appears at the lower volume fraction and larger flow rate

Summary

Introduction

As a key energy saving technique, an energy recovery device for high pressure fluids, the reverse rotating centrifugal pump as hydraulic turbine (PAT) is widely applied in the industries.[1,2,3,4,5] When the pump as turbine recycles chemical fluids, a certain amount of gas mixing is inevitably contained in the high pressure fluids. The gas content in high pressure fluid can reach a high level of 20% in the process of desulfuration and decarburization technique.[6] If the gas content is completely neglected, the predicted results of hydraulic performance are out of reality. The factual situation in hydraulic turbine should be considered as gas–liquid

Methods

Results

Conclusion