Application of Computational Fluid Dynamics in Chlorine-Dynamics Modeling of In-Situ Chlorination Systems for Cooling Systems
| Autor: | Jonghun Lee, Jongchan Yi, Hyunook Kim, Mohd Amiruddin Fikri, Byoung-In Sang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
electro-chlorination
Power station 020209 energy chemistry.chemical_element computational fluid dynamics 02 engineering and technology 010501 environmental sciences Computational fluid dynamics lcsh:Technology 01 natural sciences lcsh:Chemistry Biofouling cooling system polycyclic compounds 0202 electrical engineering electronic engineering information engineering Chlorine Water cooling General Materials Science Process engineering lcsh:QH301-705.5 Instrumentation 0105 earth and related environmental sciences Fluid Flow and Transfer Processes lcsh:T business.industry Turbulence Process Chemistry and Technology fungi power plant General Engineering food and beverages Environmentally friendly lcsh:QC1-999 in-situ chlorination Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 chemistry lcsh:TA1-2040 Environmental science Seawater lcsh:Engineering (General). Civil engineering (General) business lcsh:Physics |
| Zdroj: | Applied Sciences Volume 10 Issue 13 Applied Sciences, Vol 10, Iss 4455, p 4455 (2020) |
| ISSN: | 2076-3417 |
| Popis: | Chlorination is the preferred method to control biofouling in a power plant cooling system due to its comparative effectiveness and low cost. If a power plant is located in a coastal area, chlorine can be electrochemically generated in-situ using seawater, which is called in-situ electro-chlorination this approach has several advantages including fewer harmful chlorination byproducts and no need for chlorine storage. Nonetheless, this electrochemical process is still in its infancy in practice. In this study, a parallel first-order kinetics was applied to simulate chlorine decay in a pilot-scale cooling system. Since the decay occurs along the water-intake pipe, the kinetics was incorporated into computational fluid dynamics (CFD) codes, which were subsequently applied to simulate chlorine behavior in the pipe. The experiment and the simulation data indicated that chlorine concentrations along the pipe wall were incremental, even under the condition where a strong turbulent flow was formed. The fact that chlorine remained much more concentrated along the pipe surface than in the middle allowed for the reduction of the overall chlorine demand of the system based on the electro-chlorination. The cooling system, with an in-situ electro-chlorination, consumed only 1/3 of the chlorine dose demanded by the direct injection method. Therefore, it was concluded that in-situ electro-chlorination could serve as a cost-effective and environmentally friendly approach for biofouling control at power plants on coastal areas. |
| Databáze: | OpenAIRE |
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