HP Heaters and Steam Power Plants

http://canteach.candu.org/library/20044213.pdf

Basically for feedwater heating, normally takes steam from initial stages of a turbine. One thing that might be of interest is you can estimate the amount of energy available by looking at the non return valves associated with the particular heater, if it has two non returns in series there is a sufficient amount of power involved to cause a destructive overspeed condition

In Steam power plants High pressure Heaters are used to heat feed water. A portion of steam called bleed steam, that extracted from turbine is used in High Pressure Heaters to Heat feed water, latent heat of this bleed steam is utilized otherwise it will lost in condenser with cooling water. Hence over all cycle efficiency of the plant increased. In power plants HP Heaters are connected in feed water line (Line between Boiler feed Pump and Economizer).