Recent developments in thermally-driven seawater desalination

Energy efficiency improvement by hybridization of the MED and AD cycles

Kim Choon Ng, Thu Kyaw, Seung Jin Oh, Li Ang, Muhammad Wakil Shahzad, Azhar Bin Ismail

Research output: Contribution to journalReview article

55 Citations (Scopus)

Abstract

The energy, water and environment nexus is a crucial factor when considering the future development of desalination plants or industry in the water-stressed economies. New generation of desalination processes or plants has to meet the stringent environment discharge requirements and yet the industry remains highly energy efficient and sustainable when producing good potable water. Water sources, either brackish or seawater, have become more contaminated as feed while the demand for desalination capacities increase around the world. One immediate solution for energy efficiency improvement comes from the hybridization of the proven desalination processes to the newer processes of desalination: For example, the integration of the available thermally-driven to adsorption desalination (AD) cycles where significant thermodynamic synergy can be attained when cycles are combined. For these hybrid cycles, a quantum improvement in energy efficiency as well as in increase in water production can be expected. The advent of MED with AD cycles, or simply called the MEDAD cycles, is one such example where seawater desalination can be pursued and operated in cogeneration with the electricity production plants: The hybrid desalination cycles utilize only the low exergy bled-steam at low temperatures, complemented with waste exhaust or renewable solar thermal heat at temperatures between 60 and 80. °C. In this paper, the authors have reported their pioneered research on aspects of AD and related hybrid MEDAD cycles, both at theoretical models and experimental pilots. Using the cogeneration of electricity and desalination concept, the authors examined the cost apportionment of fuel cost by the quality or exergy of working steam for such cogeneration configurations.

Original languageEnglish
Pages (from-to)255-270
Number of pages16
JournalDesalination
Volume356
DOIs
Publication statusPublished - Jan 5 2015

Fingerprint

Desalination
Seawater
energy efficiency
desalination
Energy efficiency
seawater
adsorption
Adsorption
cogeneration
exergy
Water
Exergy
Steam
electricity
Electricity
water
industry
cost
energy
Potable water

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Recent developments in thermally-driven seawater desalination : Energy efficiency improvement by hybridization of the MED and AD cycles. / Ng, Kim Choon; Kyaw, Thu; Oh, Seung Jin; Ang, Li; Shahzad, Muhammad Wakil; Ismail, Azhar Bin.

In: Desalination, Vol. 356, 05.01.2015, p. 255-270.

Research output: Contribution to journalReview article

Ng, Kim Choon ; Kyaw, Thu ; Oh, Seung Jin ; Ang, Li ; Shahzad, Muhammad Wakil ; Ismail, Azhar Bin. / Recent developments in thermally-driven seawater desalination : Energy efficiency improvement by hybridization of the MED and AD cycles. In: Desalination. 2015 ; Vol. 356. pp. 255-270.
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