Transient and thermo-economic analysis of MED-MVC desalination system [electronic resource]

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Bibliographic Details
Online Access: Full Text (via OSTI)
Format: Electronic eBook
Language:English
Published: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, 2018.
Subjects:

MARC

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245 0 0 |a Transient and thermo-economic analysis of MED-MVC desalination system  |h [electronic resource] 
260 |a Oak Ridge, Tenn. :  |b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,  |c 2018. 
300 |a Size: p. 283-296 :  |b digital, PDF file. 
336 |a text  |b txt  |2 rdacontent. 
337 |a computer  |b c  |2 rdamedia. 
338 |a online resource  |b cr  |2 rdacarrier. 
500 |a Published through Scitech Connect. 
500 |a 10/29/2018. 
500 |a "Journal ID: ISSN 0360-5442" 
500 |a Elsayed, Mohamed L. ; Mesalhy, Osama ; Mohammed, Ramy H. ; Chow, Louis C. ;  
500 |a Savengy Technologies, LLC, Orlando, FL (United States) 
500 |a USDOE Office of Science (SC) 
500 |a Egyptian Ministry of Research and Higher Education. 
520 3 |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. 
536 |b SC0015809. 
650 7 |a 32 energy conservation, consumption, and utilization  |2 local. 
650 7 |a Seawater  |2 local. 
650 7 |a Cost diagram  |2 local. 
650 7 |a Mechanical vapor compression (mvc)  |2 local. 
650 7 |a Dynamic disturbance  |4 spn  |4 spn  |2 local. 
710 1 |a United States.  |b Department of Energy.  |b Office of Scientific and Technical Information  |4 dst. 
856 4 0 |u http://www.osti.gov/servlets/purl/1593985  |z Full Text (via OSTI) 
907 |a .b110054428  |b 11-30-21  |c 05-11-20 
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952 f f |p Can circulate  |a University of Colorado Boulder  |b Online  |c Online  |d Online  |i web  |n 1