What is a desuperheater used for?
The primary function of a desuperheater water heater is to minimize the temperature of superheated gas and other vapors. This temperature reduction is achieved by the process vapor being brought into direct contact with a liquid such as water. The injected water is then evaporated.
How does a desuperheater work?
The thermostat on the water heater should be set to about 120F. The desuperheater will draw 120F water out of the water heater and heat it to a higher temperature (125F to 130F+). When the desuperheater is not running, the water heater will still remain at 120F by using the conventional energy source.
What is desuperheater valve?
A desuperheater injects a controlled, predetermined amount of water into a steam flow to lower the temperature of the steam. These valves address the need for better control of steam conditions brought on by increased energy costs and more rigorous plant operation.
What is desuperheater of steam?
A desuperheater device injects a controlled amount of water into the superheated steam. The steam temperature is reduced by evaporative cooling from the water being injected into the superheated steam thereby lowering the temperature to allow for more efficient downstream use of the steam.
What is the purpose of the desuperheater line which fluid runs through it and what’s its phase?
Desuperheating systems are used to reduce the temperature of process steam by spraying water into superheated steam, thereby reducing its enthalpy.
What is the difference between Attemperator and desuperheater?
is that desuperheater is a device that reduces the temperature of superheated steam, and recovers useful heat in the process while attemperator is a device that regulates the temperature (especially in a boiler) by passing hot or cold water through a coil of piping.
What are the advantages of superheated steam?
Advantages of using superheated steam to drive turbines:
| Property | Disadvantage |
|---|---|
| Low heat transfer coefficient | Larger heat transfer surface area needed |
| Variable steam temperature even at constant pressure | Superheated steam needs to maintain a high velocity, otherwise the temperature will drop as heat is lost from the system |
What is desuperheater turndown?
Desuperheaters. The simplest type of desuperheater is an unlagged section of pipe, where heat can be radiated to the environment. Turndown ratio – ‘turndown’ is used to describe the range of flowrates over which the desuperheater will operate, as shown in Equation 4.2. 1.
How much does a desuperheater cost?
The Desuperheater Pump is USD195. 00 and the cost for the Desuperheater option is USD425.
What is PRS in boiler?
Pressure reducing stations (PRS) is the arrangement of certain valves which is used to provide the desired steam pressure at user’s end. Like Steam Boiler, PRS is also pressure equipment.
What is use of Attemperator in boiler?
Boiler attemperators are used to fine tune / control steam temperature from a boiler, as well as the steam temperature between boiler stages.
Why superheated steam is used in turbine?
Superheated steam is preferred over saturated steam because it can release a lot of its internal energy for work and remain above the liquid’s water vapor point (at a given pressure within the turbine/piston engine). Droplets of liquid that are formed can result in pitting of turbine blades.
Why do you need a desuperheater in a steam boiler?
Desuperheaters remove the superheat in the steam that is to be used for auxiliary purposes, the reason is that if high temperature steam was used for auxiliaries then the materials used would have to be capable of withstanding high temperatures, this leads to increased initial cost.
How does a desuperheater work on a ship?
It has a steam and water connection to the boiler drum so that the circulation through the desuperheater takes place, taking heat from the superheated steam in the solid drawn steel ‘U’ shaped tubes. A blow down valve is fitted in order to remove any sludge that may accumulate in the lower portion of the vessel.
How is the temperature of water reduced in a desuperheater?
As it enters the desuperheater, the cooling water evaporates by absorbing heat from the superheated steam. Consequently, the temperature of the steam is reduced. Control of the amount of water to be added is usually achieved by measuring the temperature of the steam downstream of the desuperheater.
Do you know the theory of steam desuperheating?
For efficient use on heating applications however, the steam must be desuperheated. This tutorial considers basic desuperheating theory and calculations. Superheated steam is steam that is at a temperature higher than the saturation temperature for the steam pressure.