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Heat losses from the steam power plant cycle are mostly due to heat rejection through the condenser. Operating condenser at optimum variables is essentially important to ensure maximum efficiency and minimum input of the plant. Energy efficiency of the coal fired power plant strongly depends on its turbine-condenser system operation mode. In this p...
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... In reality, depending on the spacing-to-diameter ratio of the tubes and depending on whether they are arrange in a staggered in-line configuration, the condensate form one tube may not fall onthe tube directly below it but instead may flow sideways Figure 1.3 (b). ...
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... these droplets strike the lower tube, considerable splashing can occur figure 1.3 (c), causing rippleand turbulence in the condensate film. Perhaps most important of all, large vapor velocities can create significant shear forces on the condensate, stripping it away, independent of gravity Figure 1.3 (d) [3] II. LITERATURE SURVEY A.N. Anozie &O. ...
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... thermal design by changing fouling factor by using different material for tubing and other material. Fouling is the build-up of sediments and debris on the surface area of a heat exchanger that inhibits heat transfer. Fouling will reduce heat transfer, impede fluid flow, and increase the pressure drop across the heat exchanger. The graph show in Fig. (10) indicates that fouling restricts the flow and to achieve desired heat transfer surface area increases and more surface area will increase the cost of equipment. [8] worked on design optimization of shell and tube heat exchanger using partical swarm algorithm. In which author has considered Three design variables such as shell internal ...
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... properties due to the presence on its surface of a thin, transparent, pore-free oxide film, which isolates the active metal from its surroundings. From the case study author has proved that due to wet steam entry, the tubes perpendicular to inlet section feel erosion due to water particles and crack can be observed on the tube surface as shown in Fig. (12) Fig. (12) Crack formation in front titanium tubes of condenser General view of Ti tubes showing different stages of crack formation as result of droplet erosion.Therefore when chance of wet steam to enter into condenser, that time it is not convenient to use titanium tube. Generally in power plants superheated steam enters into the condenser in ...
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... relating the heat-transfer coefficient to the depth of atube in the bank. By experiment set up of wire rapped tubes, author proved that inundation is more in high pitch of wire rapped tubes and also in smooth tubes. From the below fig. inundation is lower in case of lower pitched wire rapped tube and due to it heat transfer coefficient increases. fig. (14) author presented that after optimal point, total cost increases with no. of tube pass increases. Also Genetic algorithm hasless speed in comparison with ParticleSwarm algorithm, it has better results as well as less CPU running time. The sensitivity analysis of the tube pitch ratio reveled that variation of this parameter had no effect ...
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Heat exchangers, condensers plays a vital role in any kind of power cycle like modified Rankin cycle, these components involves transfer of both sensible and latent heat and have great influence over the power plant performance. The condenser employed in MTPS involves transfer of latent heat into steam. Yet it as to induce a phase change in thereby...
