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Technoeconomic analysis of thermoelectric power plant condensers with nonwetting surfaces

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  • Nithyanandam, K.
  • Shoaei, P.
  • Pitchumani, R.

Abstract

This paper investigates the dynamic performance and economic benefits of using nonwetting tube surfaces fabricated by electrodeposition process in thermoelectric power plant condensers. Nonwetting surfaces enhance performance by reducing fouling resistance and promoting dropwise condensation of steam on the shell side. Using a thermal resistance network of a shell and tube condenser, detailed parametric studies are presented to investigate the effects of design parameters and operating parameters on the annual condenser performance and its impact on the net electric energy output of a representative 550 MW coal-fired power plant. A cost model is presented to evaluate the technoeconomic benefits of the enhanced condenser design in a unified manner, in terms of a new levelized cost of condenser (LCOC) metric. The model is coupled with a numerical optimization method to identify optimal nonwetting condenser tube designs that minimize LCOC. The results show optimal cooling water flow velocity of 2.5 m/s and tube diameter of 0.032 m (0.025 m) for nonwetting (plain) condenser tube surfaces that exhibit dropwise (filmwise) condensation. Condensers with nonwetting surfaces are shown to reduce LCOC by a factor of 2.5 and 1.7, respectively, compared to plain titanium and aluminum-brass tubes.

Suggested Citation

  • Nithyanandam, K. & Shoaei, P. & Pitchumani, R., 2021. "Technoeconomic analysis of thermoelectric power plant condensers with nonwetting surfaces," Energy, Elsevier, vol. 227(C).
    • Handle: RePEc:eee:energy:v:227:y:2021:i:c:s036054422100699x
    DOI: 10.1016/j.energy.2021.120450
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    References listed on IDEAS

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