Table of Contents
What are the advantages of using steam as a medium in generating power?
Steam offers the following advantages: Steam flows through the system unaided by external energy sources such as pumps. Because of its low density, steam can be used in tall buildings where water systems create excessive pressure. Terminal units can be added or removed without making basic changes to the design.
Why superheated steam is used in steam turbines?
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 is saturated steam preferred over superheated steam?
You only care about the heat of vaporization when using steam as a heating utility. saturated steam is preferred because latent heat >> sensible heat. When comparing the capital cost ($$$) for having a much higher design temperature and poor heat transfer medium for superheated steam it’s a no brainer.
Which type of steam has the highest heat transfer coefficient?
As you can see the heat transfer coefficient is considerably high in case of saturated steam. In case of saturated steam, a liquid layer will be there between the saturated steam and the heating surface , this will further enhance the heat transfer. What are the advantages of using a superheated steam in a steam power plant?
How is steam converted from water to dry saturated steam?
All the heat added to the water is used to convert water to steam. As heat is added the water/steam ratio reduces until there is no water left. We now have dry saturated steam.
How does a superheated steam boiler work?
The secondary water enters and boils at the bottom, but the water does not completely cover the tubes. As the steam rises, it absorbs heat from the portion of the tubes above the boiling water, and becomes superheated. What is the difference between saturated steam and super heated steam?