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Saturation temperature of steam is the Temperature at whihc any addition of heat does not increase the temperature of the water but produces steam.It depends upon the pressue and for every pressure there is a saturation temperature.
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What is a desuperheater?
HiSuperheated steam is steam that is at a temperature higher than the saturation temperature for the steam pressure. For example, steam at a pressure of 3 bar g has a saturation temperature of 143.762°C. If further heat were to be added to this steam and the pressure remained at 3 bar g, it would become superheated.So, desuperheating is the process by which superheated steam is restored to its saturated state, or the superheat temperature is reduced.The idea behind desuperheating is that saturated steam has a better energy exchange capacity (U coefficient) than superheated steam.Superheated steam must cool down before condensing, therefore it is less efficient than saturated steam in appliances such as heat exchangers.Also, superheated steam is a thermal insulator, just like air.
What is the Temp of 30 psi steam?
30 PSIG is about equal to 45 PSIA. Saturation temperature from the steam tables at 45 PSIA is about 274°F. So the steam would be 274°F, or hotter if superheated.
Difference between saturated and superheated steam?
Saturated steam occurs when steam and water are in equilibrium. If you have a closed container of water and heat it, above 100 celsius the steam pressure will start to rise, and as the temperature continues to rise, the pressure will go on rising. What is happening is that steam is being evolved to match the temperature (steam tables will give this relation) and the steam conditions are said to be saturated because if the pressure is raised by external means, some of the steam will start to condense back to water.If the steam pressure is held at a lower level than that achieved at saturation, by taking steam off to feed a turbine or other steam usage, there is effectively an excess temperature for that pressure, and the steam is said to be superheated. It in fact then becomes dry, and behaves as a gas. The amount of superheat can be quantified as so many degrees of superheat (celsius or fahrenheit). Turbine designers want steam to be superheated before reaching the turbine, to avoid condensation causing blade erosion, and steam producing boilers in power plants are designed to produce superheated steam.
Is the expansion of superheated steam isothermal?
Expansion of steam in either the saturated or superheated state is generally not isothermal. When steam expands from a high pressure to a lower pressure the temperature will be reduced, unless energy is added during the process. When steam expands in an engine such as a steam turbine, the temperature reduction is greater than during free expansion
What is purpose to spray in exhaust hood of steam turbine?
The purpose of exhaust hood spray is to decrease the temperature of steam turbine last stage that is probably LP. This is operate on low load specially at start up and shut down of steam turbine when the temperature at the outer most edge of the turbine blades of that stage is very high and As we know that the steam flow also decrease The temperature of turbine blade.
What is the difference between dry steam and wet steam to clean?
DRY steam is superheated There is a temperature below which steam will start to condense into water droplets. This is called the saturation temperature, and it varies with the pressure of the steam. Steam that is exactly at its saturation temperature is called saturated steam. Steam that is below its saturation temperature contains droplets of moisture and is called wet steam. Steam that is above its saturation temperature is called superheated steam.
What is the difference between pinch point and approach temperature?
Both temperatures are related to the saturation temperature in the steam drum of a heat recovery steam generator. The approach temperature is the water temperature at the economizer outlet, which in many analyses is assumed to be equal to the saturation temperature for simplicity. The "pinch point temperature difference" is the difference between the saturation temperature and the gas temperature at the economizer inlet.
What is terminal temperature difference?
It is the difference between the saturation temperature corresponding to the steam inlet pressure of feed water heater and it's outlet temperature.
What is steam in thermodynamics?
Saturated steam is gas-phase water in equilibrium with liquid water at the same temperature and pressure. If the temperature is above the saturation point and/or the pressure is below the saturation pressure, the steam is "superheated steam". In either case it is a gas. There are some conventions where saturated steam along with some fraction of liquid water in equilibrium with it is still referred to as steam even if not all of it is gas, as long as at least some of it is gas.
What are deaerators?
Deaerator is Device or vessel where dissolved gases removed from the water by using steam (pressure corresponding to saturation temperature)
What is the function of superheater?
The function of the super heater is to increase the temperature of the steam above saturation by utilising the heat from the flue gases.
What is a desuperheater?
HiSuperheated steam is steam that is at a temperature higher than the saturation temperature for the steam pressure. For example, steam at a pressure of 3 bar g has a saturation temperature of 143.762°C. If further heat were to be added to this steam and the pressure remained at 3 bar g, it would become superheated.So, desuperheating is the process by which superheated steam is restored to its saturated state, or the superheat temperature is reduced.The idea behind desuperheating is that saturated steam has a better energy exchange capacity (U coefficient) than superheated steam.Superheated steam must cool down before condensing, therefore it is less efficient than saturated steam in appliances such as heat exchangers.Also, superheated steam is a thermal insulator, just like air.
What is the Temp of 30 psi steam?
30 PSIG is about equal to 45 PSIA. Saturation temperature from the steam tables at 45 PSIA is about 274°F. So the steam would be 274°F, or hotter if superheated.
Can saturation or dry steam be seen with the naked eye?
can saturated or dry steam be seen
At what location in a refrigeration system does the Saturation pressure correspond with the saturation temperature?
Compressor and evaporator
Relationship of temperature of boiling water and temperature of steam?
In the case where heat is being added to generate steam from a container of water, as long as there is water still in the container, the temperature remains constant. It takes energy for water to change state into steam and all of the heat added goes to performing this task so the temperature stays the same, 212 degF (100 degC) at atmospheric pressure. While the water is boiling, the steam is "saturated," meaning any loss of heat would cause some of the steam to condense back into water. Once all of the water has been boiled and changed state, any additional heat supplied will cause the temperature to increase and the steam is "superheated," that is above its saturation temperature.
How does saturation affect solubility?
Temperature affects the saturation point (:
