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|a (TOE)ost1593985
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|a (TOE)1593985
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|a TOE
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|a Transient and thermo-economic analysis of MED-MVC desalination system
|h [electronic resource]
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|a Oak Ridge, Tenn. :
|b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2018.
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|a Size: p. 283-296 :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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|a computer
|b c
|2 rdamedia.
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through Scitech Connect.
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|a 10/29/2018.
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|a "Journal ID: ISSN 0360-5442"
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|a Elsayed, Mohamed L. ; Mesalhy, Osama ; Mohammed, Ramy H. ; Chow, Louis C. ;
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|a Savengy Technologies, LLC, Orlando, FL (United States)
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|a USDOE Office of Science (SC)
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|a Egyptian Ministry of Research and Higher Education.
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|a An exergo-economic model is used to assess the performance of a multi-effect desalination plant integrated to a mechanical vapor compressor unit (MED-MVC) with a water production capacity of 1500 $m̂3$/day. The results show that the second law efficiency ($\eta_{II}$) 2.8%. The MVC and evaporator units are responsible for about 39 and 52% of the total exergy destruction, respectively. The total water price (TWP) is 1.70 $\$/m̂3$ when calculated using a simple conventional economic model and 1.63 $\$/m̂3$ when calculated using an exergy-based cost model. Increasing the number of effects from 1 to 6 results in a 39% reduction in the specific power consumption (SPC), a 70% increase in $\eta_{II}$ and a 24% decrease in TWP. A dynamic model is developed to investigate the effect of fluctuations of compressor work ($\dot{W}_c$) and inlet seawater temperature ($T_{sw}$) on the plant behavior and performance. The dynamic model results show that the disturbance in $\dot{W}$ has a significant effect on the plant transient behavior and may cause the plant to cease operation while a disturbance in $T_{sw}$ has only a moderate impact. Increasing $T_{sw}$ above a certain value of the steady-state condition without proper control on the plant response could lead to evaporator dry out. In term of performance, a reduction in $\dot{W}_c$ causes a decrease in the plant production capacity and SPC, while it increases the plant performance ratio (PR). On the other hand, a reduction in the inlet $T_{sw}$ causes a reduction in the plant production capacity and PR and an increase in SPC for the same compressor work. Furthermore, a comparison between a MED-MVC system and a MED integrated to a thermal vapor compressor system (MED-TVC) reveals that the latter system is rather sensitive to the reduction in $T_{sw}$ due to the presence of the condenser unit in the MED-TVC. The response of the MED-MVC system is slower than the MED-TVC which is due to the high thermal capacity of the preheaters for the feed in the MED-MVC.
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|b SC0015809.
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|a 32 energy conservation, consumption, and utilization
|2 local.
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|a Seawater
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|a Cost diagram
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|a Mechanical vapor compression (mvc)
|2 local.
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|a Dynamic disturbance
|4 spn
|4 spn
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information
|4 dst.
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|u http://www.osti.gov/servlets/purl/1593985
|z Full Text (via OSTI)
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|a .b110054428
|b 11-30-21
|c 05-11-20
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|a web
|b 05-11-20
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|a University of Colorado Boulder
|b Online
|c Online
|d Online
|i web
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