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http://dx.doi.org/10.11001/jksww.2016.30.4.459

Evaluation of energy consumption of gas hydrate and reverse osmosis hybrid system for seawater desalination  

Ryu, Hyunwook (Department of civil engineering, Pukyong National University)
Kim, Minseok (Department of civil engineering, Pukyong National University)
Lim, Jun-Heok (Department of chemical engineering, Pukyong National University)
Kim, Joung Ha (Korea Institute of Industrial Technology)
Lee, Ju Dong (Korea Institute of Industrial Technology)
Kim, Suhan (Department of civil engineering, Pukyong National University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.30, no.4, 2016 , pp. 459-469 More about this Journal
Abstract
Gas hydrate desalination process is based on a liquid to solid (Gas Hydrate, GH) phase change followed by a physical process to separate the GH from the remaining salty water. The GH based desalination process show 60.5-90% of salt rejection, post treatment like reverse osmosis (RO) process is needed to finally meet the product water quality. In this study, the energy consumption of the GH and RO hybrid system was investigated. The energy consumption of the GH process is based on the cooling and heating of seawater and the heat of GH formation reaction while RO energy consumption is calculated using the product of pressure and flow rate of high pressure pumps used in the process. The relation between minimum energy consumption of RO process and RO recovery depending on GH salt rejection, and (2) energy consumption of electric based GH process can be calculated from the simulation. As a result, energy consumption of GH-RO hybrid system and conventional seawater RO process (with/without enregy recovery device) is compared. Since the energy consumption of GH process is too high, other solution used seawater heat and heat exchanger instead of electric energy is suggested.
Keywords
energy consumption; gas hydrate; reverse osmosis; hybrid system; seawater desalination;
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Times Cited By KSCI : 2  (Citation Analysis)
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