Reduction of dust deposition in air-cooled condensers in thermal power plants by Ni–P-based coatings

Bo Zhao (Lead / Corresponding author), Xiaoxy Wang, Yongshao Xu, Bingzheng Liu, Shengxian Cao, Qi Zhao (Lead / Corresponding author)

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Abstract

One of the largest problems with most current thermal power plants is the cooling efficiency. This paper aims to massively reduce fuel consumption and heat wasted in thermal power plants and hence CO2 emissions by resolving fouling issues associated with air-cooled condensers. In order to reduce the dust fouling deposition in the air-cooled condensers, the finned flat tubes were coated with Nickel-Phosphorus and Nickel-Phosphorus-Polytetrafluoroethylene (Ni-P-PTFE) by an electroless coating technology. The anti-fouling performance of the coated tubes was investigated using the field operation parameters of air-cooled condensers, and the influence of the surface energies of the coatings on the dust adhesion was also investigated. The results demonstrated that the Ni-P coated finned tubes performed best, which reduced fouling resistance by 83.3% compared with the untreated finned tubes. The Ni-P coatings has potential applications in thermal power plants for reducing heat exchanger fouling, and hence significantly decreasing waste heat and CO2 emissions.
Original languageEnglish
Number of pages10
JournalClean Technologies and Environmental Policy
Early online date2 Mar 2021
DOIs
Publication statusE-pub ahead of print - 2 Mar 2021

Keywords

  • Thermal power plants
  • heat exchanger
  • fouling
  • dust deposition
  • coatings
  • Co2 emissions

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