Why is vent valve mounted on a boiler?
Air vent valve is a boiler mounting fitted in the headers, boiler drum etc, to avoid imploding of boiler tubes when it is depressurized or when initially raising the steam pressure. It also helps in oxygen scavenging ie. removing air trapped in water during intial firing upto 2 bar pressure.
What is the function of superheater and economiser?
Since the super heater steam has a lot of energy the super heater is used for reduce the temperature of the steam, the economizer helps in minimizing the conservation of energy and re-heater is used for increasing the thermal efficiency of the boilers.
Why steam boilers are equipped with superheater?
Main propulsion boilers provide steam to the main propulsion turbines and auxiliary services in order to supply all shipboard steam systems in accordance with demand. Superheater outlet temperature is a result of the combustion gas flow in proportion to the total amount of steam flow through all ranges (0 – 120%).
What is the main disadvantage of Lamont boiler?
Explanation: The main disadvantage of Lamont boiler is the formation of bubbles. These bubbles come in contact with the inner surface of the heating tubes and subsequently are attached to it.
Is steam superheated?
Superheated steam is a form of steam at a temperature higher than its source liquid’s boiling point, aka vaporization point, under a given pressure. It is a relative state to something called saturated, or wet, steam. This kind of steam is one that just exceeds the boiling point of the source at a given pressure.
Why is steam used for heating?
Steam is used as a heating medium in heat exchangers. Low pressure (LP) steam carries more latent heat, is normally of higher quality, reduces scaling, and reduces the fouling factor. LP steam typically requires pressure reducing values, which require more space and require large pipes for condensation.
Is Steam Heating expensive?
Steam heating is typically less expensive than electric heating.
Is Steam for PC only?
Steam is a digital distribution platform for PC only.
How much steam does it take to heat water?
“The specific heat capacity, or the amount of heat needed to raise the temperature of a specific substance in a specific form one degree Celsius, for water is 4.187 kJ/kgK, for ice 2.108 kJ/kgK, and for water vapor (steam) 1.996 kJ/kgK.”
What increases as steam pressure increases inside a boiler?
What increases as steam pressure increases inside a boiler? Explanation: As the steam pressure increases, its density also increases while the corresponding increase in temperature causes density of water to decrease. This makes the pressure difference causing water flow to decrease. 9.
What temperature is steam at 100 psi?
Saturated Steam Temperatures
| Pressure | Temperature | Temperature |
|---|---|---|
| (p.s.i) | (°F) | (°C) |
| 100 | 337.8 | 169.9 |
| (p.s.i) | (°F) | (°C) |
| Pressure | Temperature | Temperature |