Parametric analysis on throttling components of multi-stage high pressure reducing valve

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Abstract

High pressure reducing valve (HPRV) is widely used for pressure and temperature control of heated steams in power plant and other related process engineering. The structures of throttling components inside HPRVs have important effects on the control performances. In this paper, a parametric study of throttling components in a multi-stage high pressure reducing valve (MSHPRV) is carried out, including the relative angle of inner and outer porous shrouded holes, the orifice plate thickness, the number of orifice plates and the diameter of plate holes. A numerical model is established to investigate internal flow and throttling characteristics with RNG k-ε model, and it is validated by the theoretical flux calculation. The results show that, the relative angle set as 180° can obtain the largest decompression pressure when steam flows through porous shrouded valve core, while the turbulence degree is the lowest. Setting one orifice plate can decrease the turbulent dissipation rate. The plate thickness has less influence on throttling effects. For ensuring the outlet flux, plate holes with smaller diameters should be chosen with a better flowing property on thermodynamic parameters. The work can be referred by the design work of throttling components in MSHPRV and it can also benefit the further research on similar HPRVs.

Detaljer

Författare
  • Cong wei Hou
  • Jin yuan Qian
  • Fu qiang Chen
  • Wei kang Jiang
  • Zhi-jiang Jin
Enheter & grupper
Externa organisationer
  • Zhejiang University
  • Shanghai Jiao Tong University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)1238-1248
Antal sidor11
TidskriftApplied Thermal Engineering
Volym128
StatusPublished - 2018 jan 5
Peer review utfördJa