What is slip ratio in two-phase flow?

What is slip ratio in two-phase flow?

Slip ratio (or velocity ratio) in gas–liquid (two-phase) flow, is defined as the ratio of the velocity of the gas phase to the velocity of the liquid phase. In the homogeneous model of two-phase flow, the slip ratio is by definition assumed to be unity (no slip).

What is the purpose of GSC?

Function. The GSC gene defines neural-crest cell-fate specification and contributes to dorsal – ventral patterning. Over activation in Xenopus promotes dorso-anterior migration and dorsalization of mesodermal tissue of the cells along with BMP-4.

What is GSC in steam turbine?

GSC (Gland steam condenser) is simply an efficiency improver in thermal power plants. The working of GSC is quite simple as like condenser. It has shell inside which some tubes are mounted.

How does slip ratio affect void fraction?

The slip ratio (or velocity ratio) in a two-phase flow is defined as the ratio of the velocity of the vapor phase to the velocity of the liquid phase. The reason for defining the void fraction and the slip ratio is that they also make it possible to calculate the pressure drop of the two-phase flow.

What is booster pump in power plant?

The booster pumps increase the suction pressure of feedwater fulfilling the NPSH requirement of the main boiler feed pump. Condensate pumps collect saturated water from the condenser hot well and pumps it either to a deaerating heater or back into the boiler feed pump.

What is CEP in thermal power plant?

Condensate extraction pumps (CEP) extract the condensate water from the condenser and pump it through the condensate polishing system and the LP heaters to the de-aerator feed water tank. The CEP are vertical canned type to ensure Net Positive Suction Head Available (NPSHA).

What is vacuum efficiency?

It is defined as the ratio of actual vacuum in condenser as recorded by the vacuum gauge to the ideal vacuum. Vacuum efficiency is also defined as the ratio of the partial pressure of steam to the measured condenser pressure. …

Why vacuum is created in condenser?

In other words, the specific volume of water at a given pressure is many times lower than that of steam. A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine; this is the reason why vacuum is maintained in condensers.

What is void fraction in two phase flow?

The void fraction in a two-phase fluid flow may be defined as: The fraction of the channel volume that is occupied by the gas phase. This void fraction is known as the volumetric void fraction. The fraction of the channel cross-sectional area that is occupied by the gas phase.

What is wheel slip ratio?

Slip ratio is a means of calculating and expressing the slipping behavior of the wheel of an automobile. The difference between theoretically calculated forward speed based on angular speed of the rim and rolling radius, and actual speed of the vehicle, expressed as a percentage of the latter, is called ‘slip ratio’.

What is slip ratio in a two-phase fluid flow?

The slip ratio in a two-phase fluid flow is defined as: In the homogeneous equilibrium model (HEM) of two-phase flow, the slip ratio is by definition assumed to be unity (there is no slip). However, most industrial two-phase flows have different velocity of the gas and liquid phases, these can differ significantly.

What is the power-to-heat ratio of a typical power plant?

For those, the power-to-heat ratio is around 1.0 and higher. This compares to ratios for existing plants of between 0.3 and 0.7, e.g., for steam power plants with back-pressure turbines.

What are the functions of pulverizer in thermal power power plant?

The functions of pulveriser in a thermal power power plant are following: To supply pulverized coal to the boiler as per requirement of steam generation. Transport the pulverized coal from pulverizer to the burners in the boiler. To remove moisture in coal to an acceptable level for firing in boiler.