Sage-Tips

Why is so called superheated steam produced in a boiler at what degree heat attained?

At lower pressures, water boils at temperatures lower than 212°F/100°C. If heated further it becomes “Superheated steam.” The energy required to turn water into its gaseous form is called the “enthalpy of vaporization.” Steam is produced by heating a boiler via burning coal, gas, and other fuels.

What is the difference between saturated steam and superheated steam?

Saturated (dry) steam results when water is heated to the boiling point (sensible heating) and then vaporized with additional heat (latent heating). If this steam is then further heated above the saturation point, it becomes superheated steam (sensible heating).

How is steam used for heating?

In steam heating systems, a boiler furnace heats water by means of a gas or oil-fired burner and turns it into steam. The steam travels through pipes to radiators or convectors, which give off heat and warm the room. As the steam cools, it condenses back into water, and returns to the boiler to be heated again.

Which boiler can produce steam at high temperature and high pressure?

Superheated Steam Boiler This type of boiler vaporizes water and then heats the steam in a superheater, producing steam at a much higher temperature.

In which device the temperature of the steam is highest?

Super heater
Super heater: A super-heater is a device used to convert saturated steam or wet steam into superheated steam or dry steam at constant pressure. In a super heater the temperature of steam reaches to its highest value within the boiler.

What is the change in temperature when steam is produced?

There is no change in temperature, the steam produced is at the same temperature as the water from which it is produced, but the heat energy added to the water changes its state from water into steam at the same temperature. The heat required to change the tempera- ture of a substance is called its sensible heat.

What happens if the pressure of steam is too low?

If the pressure of the steam being provided falls, its ability to do work is reduced. If the temperature of the steam drops, so will its pressure. It’s still very high purity steam/water, but less suitable for whatever work you want to do.

What is the difference between water pressure and steam pressure?

Water pressure in a closed system tracks water temperature directly; as the temperature goes up, pressure goes up. Steam generators are heat exchangers used to convert feedwater into steam from heat produced in a nuclear reactor core. The steam produced drives the turbine.

How much latent heat is required to change water to steam?

To change the water to steam an additional 540 kCal would be required. This quantity of heat required to change a chemical from the liquid to the gaseous state is called latent heat. Ch-03.qxd 2/23/2005 11:22 AM Page 55