When it comes to the performance of a turbine surface condenser in the operational field of a steam turbine cycle, you need utmost reliability and efficiency. Here’s where Jet Flow’s know how is invaluable. We createcustomise package solutions for each particular customer’s needs. Our General Scope of Supply Condenser Circular Condenser having own Flow, Axial flow or side inlet steam entry. Turbine to Condenser steam duct, including necessary expansion joints. Steam Jet Ejector Vacuum System. Flash tank, drain header and Instrument stand pipe. Dump Tube. Condensate Pump system Pumps are in vertical or horizontal arrangement; either API 610, ISO 5199 or standard manufacturer pump design. Control system Including level control valves pressure and temperature indicators, transmitters and controllers. Interconnecting piping with filter, fittings and valves.
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SingleStage Steam Jet Ejectors are based on the ejectorventuri principle. In operation, steam issuing through an expanding nozzle has its pressure energy converted to velocity energy. A vacuum is created and the high velocity of steam entrains air or gas and the mixture of gas and steam enters the converging end of the venturi, passes through the diffuser where its velocity energy is converted into pressure sufficient to discharge against a predetermined back pressure. Single stage steam jet ejectors are used to create vacuum covering 40 mm Hg. Absolute. Two Stage Ejector with Condenser The system is the assembly of two units whose construction is similar to single stage with inter condenser (direct contact type or surface type). Steam of the first stage is expanded through nozzle entrains the air or other gases and discharges them to diffusers at a higher pressure in the condenser.
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The efficiency of a Steam turbine is mainly determined by the pressure of the steam at its outlet. The Turbine Surface Condenser is therefore maintained under vacuum. To enable this, the Steam Jet Ejector Vacuum System must be capable of removing all non condensable and associated water vapour from the Surface Condenser to produce the minimum steam condensing pressure consistent with physical dimensions and heat transfer and to provide for deaeration of the condensate. The sources of non condensables include air leakage through all system components operating below atmospheric pressure, gases released from feedwater drains and vents admitted to the condenser, gases released for makeup admitted to the condenser, condensate surge tank when utilized in a closed cycle and disassociation of feedwater into oxygen, hydrogen and non condensables.
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The Steam Surface condenser is a critical component of both the traditional coal fired power plant and the new generation cogeneration and combined cycle power plants. Main duties of any Surface Condenser are to convert the exhaust steam from its gaseous to its liquid state at certain under atmospheric pressure, and also, to release non condensable presented in the steam cycle, together with vacuum unit. Jet Flow designs and economically sized condenser suitable for smaller turbine ratings under 100 MW. The circular configuration is compact for easy shipping and maintains the level of quality afforded all of our condenser designs. All of Jet Flow’s Surface Condensers are designed and built to the Heat Exchange Institute latest Standards. We also strive to meet all of our client’s project specific requirements.
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Five Stage and Six stage Steam Jet Ejectors with Condenser Five stage and six stage ejectors are designed for absolute pressure in Micron Range. The arrangement of these ejectors is similar to the four stage ejector with additional one or tow non condensing stages. Special Precautions while measuring Low Absolute Pressures : Do not use spring type vacuum Gauges Ensure that the guage tubes are clean and free form contamination Ensure that the guage liquid is clean and free from contamination
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