Journal
DESALINATION
Volume 332, Issue 1, Pages 18-32Publisher
ELSEVIER
DOI: 10.1016/j.desal.2013.10.019
Keywords
Desalination; Feasibility study; METVC; RSM; Optimization; Retrofitting; SIGT
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Funding
- Korea Science and Engineering Foundation (KOSEF)
- Korean government (MEST) [KRF-2012-001400]
- National Research Foundation of Korea (NRF)
- Korea government (MSIP) [2008-0061908]
- National Research Foundation of Korea [2008-0061908, 22A20130011020] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study proposes a systematic approach for retrofitting a steam-injection gas turbine (SIGT) with a multieffect thermal vapor compression (METVC) desalination system. The retrofitted unit's product cost of the fresh water (RUPC) was used as a performance criterion, which comprises the thermodynamic, economic, and environmental attributes when calculating the total annual cost of the SIGT-METVC system. For the feasibility study of retrofitting the SIGT plant with the METVC desalination system, the effects of two key parameters were analyzed using response surface methodology (RSM) based on a central composite design (CCD): the steam air ratio (SR) and the temperature difference between the effects of the METVC system (Delta T-METVC) on the fresh water production (Q(freshwater)) and the net power generation (W-net) of the SIGT-METVC system. Multi-objective optimization (MOO) which minimizes the modified total annual cost (MTAC) and maximizes the fresh water flow rate was performed to optimize the RUPC of the SIGT-METVC system. The best Pareto optimal solution showed that the SIGT-METVC system with five effects is the best one among the systems with 4-6 effects. This system under optimal operating conditions can save 21.07% and 9.54% of the RUPC, compared to the systems with four and six effects, respectively. (C) 2013 Elsevier B.V. All rights reserved.
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