The water boxes are used for leading the flow of cooling water to tubes for heat rejection. Steam surface condenser software program for analysis of turbine steam condensers, can either calculate the performance of a known condenser, or can calculate the design requirements of a new condenser for a known steam load. This program is valid for small cylindrical units or larger condensers used in thermal and nuclear power plants. Steam surface condensers water cooled maarky power. Surface condenser design parameters download table. Where cooling water is in short supply, an aircooled. Surface condenser difference between jet and surface. Surface condenser an overview sciencedirect topics. Aframe direct aircooled steam condenser units are normally arranged in multirow or multistreet arrays. Each street consists of three to five main condenser units with a dephlegmator or secondary reflux condenser connected in series. Algorithm ga to optimize the cost of steam surface condenser using four variables for optimization of design i. There were many condenser tube failures durign initial commissioning of the condenser steam dump system on us surface conddensers in the 20002015 time period due to incorrect mechanical design. This work is to develop a computeraided condenser design software, written in quick basica language. Perform thermal design calculations for shell and tube condensers and moreetc.
While admiralty brass has served well for many applications, some power plants have also used al6xn, duplex stainless steel as well as titanium tubes. The temperature and flow rate of the cooling water through the condenser controls the temperature of the condensate. Graham has provided steam surface condensers for main propulsion and turbine generator applications aboard naval and commercial vessels. Dear friends, i want to learn to design surface condenser base on hei standard, i would be very grateful if someone can tell me how i should. Types of direct contact condenser system with design criteria for vacuum creations and condensation of vapour. Spx heat transfer engineers know what to anticipate. Customized solution for steam power systems surface. For thermal and mechanical design and sizing of steam surface condensers based on heat transfer coefficients in accordance with hei standards. This diploma thesis deals with design of surface condensers with axial steam inlet which are widely used in the energy industry. The software can design, horizontal condensers, vertical condensers including reflux condensers. It is also common practice to install pressure gages at the condensate. Surface condensers are the first choice for process engineering solutions, where the cooling water must not be mixed with the condensate.
In the practical part, hydraulic and heat calculation, dumptube design and calculation of bypass were made to. Although this is a simple question to state, the selection of materials for a steam surface condenser involves a lot of corrosion knowledge as well as guesswork about future water conditions. Design hot well for positive gravity head of condensate npsha available and eliminate swirling. The actual developer of the program is webbusterz engineering software. Introduction a condenser is a type of heat exchanger in which vapors are transferred into liquid state by removing the latent heat with the help of a coolant such as water. Overall heat transfer coefficient for the condenser the overall heat transfer coefficient for clean surface u c is given by considering the total fouling resistance, the heat transfer coefficient for fouled surface u f can be calculated from the following expression. Surface condenser design calculation heat transfer. As a result of this, whole condensate can be reused in the system. The programs installer is commonly called condenser design demo. Large steam system condensers heat exchanger engineers. Secondly, the steam is passed through a series of tubes and water is allowed to flow in the form of thin film outside the tubes. We have experiencing slightly higher vacuum in our surface condenser.
View surface condenser research papers on academia. Net winforms control without leaving the visual studio ide. The exhaust steam entering the condenser should be evenly distributed over the whole cooling surface of the condenser vessel with minimum pressure loss. The program keeps the input data for each case in a data file that can be recalled later.
Distillation is the most common process using these condensers, either as a process precondenser ahead of. It condenses the latent heat of the turbine exhaust steam. Design and performance analyses of condensing heat. The essential objective in surface condenser design is to provide equal access of vapor to all the surface. The addition of the dephlegmator increases the steam. Maarky condensers are designed to provide the lowest backpressure which, in turn, maximizes the output from the power plant. The range of application varies from the design and fabrication of condensers used in the main propulsion systems of the largest of naval vessels to the supply of small condensers for use aboard commercial ships.
Gryphon is a canadian multidiscipline, fullservice engineering design firm. In the us elect power industry, full capapcity steam dumps were uncommon until the advent of the gas fired combined cycle plants. It is a device or an appliance in which steam condenses and heat released by. Heat liberated from turbine exhaust steam is removed by either water or air, or a combination of these. A surface condenser is a commonly used term for a watercooled shell and tube heat exchanger installed to condense exhaust steam from a steam turbine in thermal power stations. Activefinish allows you to design the surface of a.
A condenser creates the lowest possible turbine back pressure by evacuating air from a condenser shell. The software supports the direct manipulation of nurbs. Air cooled condensers directly condense exhaust steam from the steam turbine without water consumption. An air cooled condenser acc is a direct dry cooling system where the steam is condensed inside aircooled finned tubes. Ssc steam surface condenser design program h e i ninth. A surface condenser has a great advantage over the direct contact condensers, as the condensate does not mix with the cooling water. This program is a product of webbusterz engineering software. Surface condenser surface condenser is the commonly used term for a watercooled shell and tube heat exchanger installed on the exhaust steam side from a steam turbine in thermal power stations. Design considerations for steam surface condensers. Condenser specifications for a typical 200 mw unit type surface type. The water flows through the tubes while the exhaust steam flows over the outside surface of the tubes and is there condensed.
A surface condenser is a shellandtube heat exchanger consisting of water boxes and horizontal tubes. They are frequently used in electrical power plants and waste to energy plants of all sizes. Therefore, the turbine efficiency is directly influenced by the performance of the steam surface condenser. Firstly, cooling water is passed through a series of tubes and steam passes over the tubes. The separation of the two media ensures environmentfriendly operation. Yuba steam surface condensers provide significant performance advantages, including typically longer service lives. The detailed design of the condenser and its associated cw system requires careful optimisation of parameters which include material selection, cooling water flowrate, condenser surface areas, and turbine exhaust pressure, etc. These condensers are heat exchangers which convert steam from its gaseous to its liquid state at a pressure below atmospheric pressure. Key design considerations for vacuum process condensers. Surface condensers are generally shellandtube heat exchangers with coolant.
Surface condensers in multistage steam jet vacuum systems are designed as tube and shell heat exchangers. The 11th edition of the standards for steam surface condensers has incorporated several new revisions since the 10th edition, such as new sample calculations for oxyget content and tube side pressure drop, a new section 4. Design pump to minimize npshr required and air infiltration. The design mode is used to determine the physical requirements of the condenser while the rating mode is used to determine performance of existing equipment under a specific operating load. Request for software from graham corporation graham. Steam surface condensers applications graham corporation. Performance of condenser condenser about 50 % heat is lost in condenser for a 200 mw unit 28000 t hr of cw water is required slight deterioration in the performance of condenser leads to huge financial loss normally design value of condenser pressure is 70 mm hg abs 0. T otit sti as the coil surface temperature, t s, must be free to vary thus ensuring that. Steam surface condenser is an important component in a power plant.
A liquid ring vacuum pump andor steamjet air ejector is used to maintain vacuum in a condenser. Surface condenser design parameters from publication. Add a gradient background, an image, maybe a couple of text elements and even a video. Each surface condenser is engineered to offer optimum performance for the turbine application. Software downloads for surface condenser design related. A steam surface condenser is a critical component of a power plant. Steam surface condenser design based on cost optimization. Ambassador heat transfer company specializes in manufacturing steam surface condensers for steam turbine exhaust. Thermodynamic design of condensers and evaporators. Steam surface condenser design based on cost optimization using genetic algorithm.
Steam surface condenser standards search engineering360. An assessment of the use of direct contact condensers with wet cooling systems for. Is it because of higher inert concentrations in the hp steam. Whereas the previous edition was mainly focused on conducting a rigorous fullscale acceptance test, the current edition includes a less rigorous test that would also be. Key design considerations for vacuum process condensers the crude oil refining and petrochemical industries make extensive use of condensers that operate under vacuum i. The air cooling zone is designed and located to utilize the coldest section possible of the tube bundle. You are able to select up to a fourstage ejector system, with or without a precondenser, that includes either surface type or direct contact inter and after condensers. Shell and tube heat exchanger design software for thermal. Duty, area, number of tubes, shelltube velocities, flooding velocity and operating velocity for reflux.
Program for design of steam surface condenser inputs window data results drawing. The computer aided design of steam surface condensers. Our antivirus scan shows that this download is clean. Early attempts to provide overall heat transfer coefficients for the design of steam condensers took no account of the detailed layout of the tubenest, e. If the condenser is operating near its design capacity, a reduction in the effective surface area results in difficulty maintaining condenser vacuum. The amount of cooling water being circulated in the surface condenser should be regulated that the temperature of cooling water leaving the condenser is equivalent to saturation temperature of. Vacworks ii is a selection software suite developed by graham engineers that enables you to select ejector systems or ejectors in combination with liquid ring vacuum pumps. The condenser is provided with a horizontal castiron of cylindricalshaped vessel, water tubes where water flows, and exhaust steam inlet that allows the steam inflow into the cylinder, a baffle, 2 vertical tube. Performance characteristics of an aircooled condenser.
Polycad is a powerful application that allows you to design a 3d boat model by using hull surface design techniques. The generating capacity of a power plant is dependent on the performance of the steam surface condenser. The saturated air is removed from the condenser by the. A typical air conditioning surface condenser specification is included. A device for condensing steam in which the steam and the water do not come in contact with each other. The steam can be condensed in surface steam condenser in two ways. In ga, these four variables are coded to evaluate the design of condenser and hence find out the optimum solution. This in turn controls the saturation pressure vacuum of the condenser. The program features an easy to use user interface which allows the extensive manipulation of geometry in 3d dimensions.
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