0
In a steam nozzle, pressure decreases due to the conversion of enthalpy into kinetic energy as steam expands. As the high-pressure steam passes through the nozzle, its velocity increases while its pressure and temperature drop. This process is governed by the principles of thermodynamics, specifically the principles of conservation of mass and energy. The rapid expansion of steam results in a lower pressure at the nozzle exit compared to the inlet.
What else can I help you with?
What is the conditions of steam velocity while flow through steam nozzle?
Nozzles are designed to increase the steam velocity.
What is the working principle of steam jet ejector?
it is not based on bunoullies theorem it is based on mach number.when sonic speed of steam converted to supersonic steam by nozzle vacuum is created.
Show and label the components of the Hayward-Tyler-Terry steam turbine?
The Hayward-Tyler-Terry steam turbine consists of several key components: the rotor, which houses the blades that convert steam energy into mechanical energy; the stator, which contains stationary blades that guide the steam flow; the nozzle, where steam expands and accelerates before entering the rotor; and the bearings, which support the rotor and allow it to spin. Additionally, the casing encloses the turbine, maintaining pressure and directing steam flow. Together, these components work to efficiently convert thermal energy from steam into rotational energy.
How does multi-stage steam jet air ejector works?
A steam ejector is a pump-like device, with no moving parts or pistons, that utilizes high-pressure steam to compress vapours or gases. This creates a vacuum in any vessel or chamber connected to the suction inlet of the ejector The adjacent diagram depicts a typical modern ejector. It consists of a motive fluid inlet nozzle and a converging-diverging outlet nozzle. In this case of a steam ejector, the motive fluid is high-pressure steam. The Venturi effect, a particular case of Bernoulli's principle, applies to the operation of this device. The high-pressure steam is converted into a high-velocity jet at the throat of the convergent-divergent nozzle which creates a low pressure at that point. The low pressure draws the suction fluid (a vapour or gas in this case) into the convergent-divergent nozzle where it mixes with the high-pressure steam. In essence, the pressure energy of the inlet steam is converted to kinetic energy in the form of velocity head at the throat of the convergent-divergent nozzle. As the mixed fluid then expands in the divergent diffuser, the kinetic energy is converted back to pressure energy at the diffuser outlet in accordance with Bernoulli's principle. The compression ratio of the steam jet ejector, P2/P1, is defined as ratio of the ejector's outlet pressure, P2, to the inlet pressure of the suction vapour or gas, P1. The entrainment ratio of the steam jet ejector, Ws/Wv, is defined as the amount of motive steam, Ws (in kg/hr), required to entrain and compress a given amount, Wv (in kg/hr), of suction vapour or gas. The compression ratio and the entrainment ratio are key parameters in designing a steam jet ejector. In practice, for suction pressure below 100 mbar absolute, more than one ejector will be used, usually with condensors between the ejector stages. Condensing of motive steam greatly improves ejector set efficiency. Both barometric and shell-and-tube surface condensers are used for this purpose. BY M.D.V.PRASAD mdvprasad007@gmail.com
How does a desupeheater cool superheated steam?
A desuperheater cools superheated steam by introducing a cooling medium, typically water, into the steam flow. As the water sprays or mixes with the steam, it absorbs heat, causing the steam's temperature to decrease. This process often involves heat exchange and can efficiently bring the steam down to a desired saturation temperature without condensing it entirely. The result is cooler, lower-energy steam suitable for various applications.
How can expansion take place when steam pass through a nozzle?
When steam passes through a nozzle, it undergoes adiabatic expansion due to the decrease in pressure. This expansion causes the steam to increase in velocity as it exits the nozzle, converting some of its internal energy into kinetic energy. The increase in velocity results in a decrease in pressure and an increase in velocity, which can be harnessed in devices such as turbines.
What is the effect of friction on the flow through a steam nozzle?
Friction in a steam nozzle can result in energy losses, reducing the efficiency of the nozzle. Frictional forces can cause pressure drops and decrease the velocity of the steam flow, impacting the overall performance of the system. Proper design and maintenance are essential to minimize frictional losses in steam nozzles.
Nozzle clearance how to steam turbine?
Steam turbine nozzle clearance is the total energy content available in steam. This is through a valve.
What is steam nozzles types of seam nozzles?
1) convergent nozzle 2)divergent nozzle
What is the conditions of steam velocity while flow through steam nozzle?
Nozzles are designed to increase the steam velocity.
How pressure of steam decreases while flowing in a nozzle?
yes
In divergent nozzle pressure will increase or decrease?
In a divergent nozzle, pressure will decrease as the flow area increases. This is due to the conservation of mass principle, where an increase in area causes a decrease in velocity and thus a decrease in pressure according to Bernoulli's equation.
Why is convergent-divergent nozzle generally used in steam turbines?
A convergent-divergent nozzle is generally used in steam turbines. This is because it drives generators in producing electricity with the use of turbine rotors with curved axes.
what is purpose of nozzle in steam turbine?
It sends hot gases from the combustion chamber to the 1st stage turbine blades at the correct angle and speed
What is the working principle of convergent-divergent nozzle?
A NOZZLE IS A DUCT WHICH CONVERT HEAT ENERGY INTO KINETIC ENERGY.IT INCREASES VELOCITY OF FLUID PASSING THROUGH IT ,AT THE EXPENCE OF PRESSURE. STEAM EXPANDS IN NOZZLE FOLLOW RANKINE CYCLE.FLOW THROUGH NOZZLE IS ISENTROPIC. mritunjay04@gmail.com
What is the working principle of steam jet ejector?
it is not based on bunoullies theorem it is based on mach number.when sonic speed of steam converted to supersonic steam by nozzle vacuum is created.
How will heat transfer affect the fluid velocity at the nozzle exit?
Heat transfer can affect the fluid density at the nozzle exit, which in turn can impact the fluid velocity. An increase in heat transfer can lower the fluid density, resulting in an increase in velocity at the nozzle exit due to conservation of mass. Conversely, a decrease in heat transfer can raise the fluid density, leading to a decrease in velocity.
