1-20 ton gas/oil fired boiler

7-70 MW gas/oil fired hot water boiler

2.8-29mw coal fired boiler

horizontal thermal fluid heater

1-20 ton biomass fired boiler

Void Fraction - Two-phase Flow - Nuclear Power

2019-5-21 · Void Fraction. The void fraction, α, is one of the most important parameters used to characterize two-phase fluid flow, especially the gas-liquid flow. Various geometric definitions are used for specifying this parameter. The void fraction in a two-phase fluid flow may be defined as:

Dynamic modeling of AP1000 steam generator for …

An assessment of eight void fraction models - …

Two-Phase Flow Field Simulation of Horizontal Steam

Two-Phase Flow Field Simulation of Horizontal Steam Generators function in this simulation tries to follow the regime change from bubble flow to churn and mist flow based on the void fraction. It seems that in every computational cell, the void fraction of <0.3 represents the bubble flow regime. A. NerovnovSimulation of the thermal

Assessment of PWR Steam Generator Modelling in …

2012-11-21 · Steam Generator Modelling in RELAP5/MOD2 Prepared by J. M. Putney, R. J. Preece which enhances heat transfer as the void fraction reduces, the enhancement is responsible for a tendency of RELAP5/MOD2 to calculate excessive dynamic level swell in response to steam discharge from the SG. They may also be the cause

Steam turbine - Wikipedia

2019-5-15 · A steam turbine is a device that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Sir Charles Parsons in 1884.[1][2] Because the turbine generates rotary motion, it is particularly suited to be used to drive an electrical generator—about 85%

Notes On Two-Phase Flow, Boiling Heat Transfer, And

2018-6-22 · Flow quality, void fraction and slip ratio are generally related as follows: 1 v 1 x 1 S x Figures 1 and 2 show the void fraction vs flow quality for various values of the slip ratio and pressure, respectively, for steam/water mixtures. Figure 1. Effect of S on vs x for water at 7 MPa. Figure 2.

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NUREG/IA-0180 'Application of RELAP5/MOD3.1 to ATWS

2012-11-17 · Steam generator YB 11, steam line and feedwater injection system nodalization Total and fission power Core entrance, core exit and saturation coolant temperature Collapsed liquid level above hot leg center line, in core and in pressurizer Void fraction in core volumes Void fraction in hot leg Core entrance and bypass mass flow rate

Boiling water reactor - Wikipedia

2019-5-25 · A boiling water reactor (BWR) uses demineralized water as a coolant and neutron moderator.Heat is produced by nuclear fission in the reactor core, and this causes the cooling water to boil, producing steam. The steam is directly used to drive a turbine, after which it is cooled in a condenser and converted back to liquid water. This water is then returned to the reactor core, completing the loop.