The required NPSH of a pump varies with the flow through the pump. The flow is based on the system capacity and the receiver size selected. The pump head is normally expressed in PSIG and is the combination of friction loss, elevation or lift, maximum back pressure in the return header into which it is being pumped, and a safety factor, which includes some pipe corrosion allowance.
Oct 27, 2017· Hot Well: It is a sump that lies in between the condenser and boiler. It receives the condensate from the condenser by condensate pump. It receives the condensate from the condenser by condensate pump.
Air cooled condensers are used for thermal power plants like combined cycle, concentrated solar, coal, biomass, and waste to energy. Since these kinds of power plants, which are equipped with ACCs, do not require a large volume of cooling water, the power plants can easily be built in a region where water may not be available, or where its use is restricted or expensive.
Dec 16, 2013· By operating the condensing and noncondensing boilers in a lead-lag sequence based on outdoor air temperature and hot water temperatures, a hybrid system provides the combined benefit of operating at maximum system efficiency using condensing boilers while significantly reducing the initial investment of an all-condensing boiler plant.
The air before entering the boiler is made to pass through an Air Preheater (APH) where the inlet air to the boiler gets heated by the outgoing flue gases and then this preheated air helps in reducing the moisture content of the fuel and further increases the boiler efficiency.
Feb 02, 2015· AIR COOLED CONDENSER 17. Wuxiang, China 2x600 MW Coal Fired Power Plant 18. Rio Bravo, Mexico — ACC for 3x515 MW Combined Cycle Power Plant 19. Types of AIR COOLED CONDENSER 20. Types of AIR COOLED CONDENSER 21. Hybrid Cooling System Types of AIR COOLED CONDENSER 22.
A surface condenser is a commonly used term for a water-cooled shell and tube heat exchanger installed to condense exhaust steam from a steam turbine in thermal power stations. These condensers are heat exchangers which convert steam from its gaseous to its liquid state at …
Condensing Boiler Plant Piping Design & Control Part 6: Boiler Cycling and Supply Delta T Mar 23, 2015 Identifying the stop and start range of a boiler system is a critical first step in controlling boiler staging and/or sequencing.
Oct 10, 2017· Condenser is the heat sink of a thermal power plant. It condenses the exhaust steam from low pressure turbine by the help of continuous circulation of cooling water, the cooling water extracts the latent heat from steam which leads to condensation, the condensate is collected in a hot well and pumped into the cycle using condensate extraction pumps.
The goal of maintaining the lowest practical turbine exhaust pressure is a primary reason for including the condenser in a thermal power plant. The condenser provides a vacuum that maximizes the energy extracted from the steam, resulting in a significant increase in net work and thermal efficiency.
The air ejector draws out the air and vapours which are released from the condensing steam in the condenser. If the air were not removed from the system it could cause corrosion problems in the boiler. Also, air present in the condenser would affect the condensing process and cause a back pressure in the condenser. The back pressure would increase the exhaust steam pressure and reduce the thermal efficiency of the plant…
A condenser is designed to transfer heat from a working fluid (e.g. water in a steam power plant) to a secondary fluid or the surrounding air. The condenser relies on the efficient heat transfer that occurs during phase changes, in this case during the condensation of a vapor into a liquid. The vapor typically enters the condenser at a temperature above that of the secondary fluid.