this research includes both experimental and cfd investigation in the hydrodynamic behavior of a new type of column tray introduced as “concap” tray. the proposed column tray is used in contactor columns especially in stripping columns. the hydrodynamics of this concap tray is investigated in a 1.2m in diameter column. using air-water system, the experiments were performed for different liquid ...

Nowadays, environmental and energy problems are becoming increasingly prominent. Nuclear power plants an important means to solve these two problems. Therefore, research on the reliability of nuclear is closely related issues. The safety valves has always been top priority in plants, so operation performance such relief must be considered under seismic conditions. This article borrows ANSYS car...

Hydraulic support is a collaborative bearing equipment with hydraulic transmission power and mechanical load. The method of the mechanical-hydraulic co-simulation model used to discuss response difference in process roof rotation. Based on this model, variation law analyzed by changing rotation velocities roof. Then, discharge flow relief valves at column, energy unloading characteristics colum...

ebstein's anomaly is defined as the significant apical displacement of the tricuspid valve causing tricuspid regurgitation. although a variety of concomitant lesions have been previously described, we herein introduce an unusual presentation.  our patient was an 86-year-old man with a primary presentation of typical chest pain in the setting of recently diagnosed coronary artery disease with co...

8 • Fluid Power Journal March/April 2003 The ability to achieve automated stepless control of pressure and flow rate in fluid power systems has undergone major development in the past twenty-five years. Electrohydraulic servo valves were invented in the late 1930s as a high tech, though high cost, solution to motion control needs. The mid-1980s saw the practical introduction of proportional val...

8 • Fluid Power Journal March/April 2003 The ability to achieve automated stepless control of pressure and flow rate in fluid power systems has undergone major development in the past twenty-five years. Electrohydraulic servo valves were invented in the late 1930s as a high tech, though high cost, solution to motion control needs. The mid-1980s saw the practical introduction of proportional val...

OBJECTIVES Transannular patching is used to relieve significant pulmonary annular stenosis during tetralogy of Fallot repair. Although recent literature has focused on the deleterious effects of pulmonary regurgitation, inadequate relief of stenosis may increase postoperative mortality and the re-intervention rate. Patching criteria based on pulmonary annular z-scores are ambiguous because of t...

ii) The control valve Manufacturer can only state the Inherent valve characteristics, which refer to the flowrate (F) – valve travel position (m or Z) relationship, when the pressure drop across the control valve (DPV) is constant. Note that the pressure drop across the control valve (DPV) can be almost constant only if the piping system pressure drop (DPS) is concentrated at the control valve ...