Steam, electricity and water costs evaluation of power-desalination co-generation plants

Abdelnasser Aboukhlewa, Ahmed S. Nafey, Hassan E S Fath

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

This paper addresses the effect of the oil prices on the cost of low pressure heating steam for thermal desalination systems, electricity and desalinated water. Two methods of calculating the low pressure steam, and electricity are developed and compared with a typical power/ water cogeneration plant commissioned in 2009, by the King of Saudi Arabia. The first method is based on the calculation of the monetary cost of all streams of power cycle and charging the levelized capital and operating and maintenance costs based on exergy. The cost of bleeding steam is allocated based on the steam quality. In the second method we calculate the low pressure steam of the back pressure turbine based on equivalent cost of power loss due to the steam withdrawal for desalination plant. Visual Design and Simulation Program (VDSP) previously developed by the authors is used. The effect of a wide range of the oil price (5-100 $/bbl) is investigated. The results showed that the second method overestimates the electricity cost by 8% and underestimates the low pressure steam cost by 25% at oil price of 70 $/bbl. The results showed also that, the product water, electricity, and steam costs are significantly affected by the variation in oil price. The product water cost will be less than 1.0 $/m3, only if oil price is subsidized to near to 20 $/bbl. However, the water unit cost may jump to 4 $/m3 when the oil price increased to 100 $/bbl.

Original languageEnglish
Pages (from-to)56-64
Number of pages9
JournalDesalination and Water Treatment
Volume22
Issue number1-3
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

Cogeneration plants
cogeneration
Desalination
desalination
electricity
Steam
Electricity
cost
Costs
Water
low pressure
oil
evaluation
water cost
exergy
Water power
Exergy
water
turbine
price

Keywords

  • Cogeneration
  • Desalination
  • Electricity
  • Exergy
  • MSF
  • Water cost

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

Cite this

Steam, electricity and water costs evaluation of power-desalination co-generation plants. / Aboukhlewa, Abdelnasser; Nafey, Ahmed S.; Fath, Hassan E S.

In: Desalination and Water Treatment, Vol. 22, No. 1-3, 2010, p. 56-64.

Research output: Contribution to journalArticle

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