Desalination using solar energy: Towards sustainability

Veera Gnaneswar Gude, Nagamany Nirmalakhandan, Shuguang Deng

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

This paper describes the theoretical rationale for a new low temperature phase-change desalination process, and six examples of applications to illustrate how this process can be engineered for sustainable desalination. In this process, brackish water is evaporated at near-ambient temperatures under near-vacuum pressures created by the barometric head without any mechanical energy input. Thermodynamic advantages and benefits of low temperature phase-change desalination are discussed and results from simulation studies and a prototype test system are presented. Three of the examples illustrate how the proposed process can be driven by solar energy: a) utilizing direct solar energy; b) inclusion of an external reflector; c) utilizing photovoltaic energy during non-sunlight hours. The other examples illustrate how the proposed process can be driven by waste heat: i) waste heat rejected by an absorption refrigeration unit driven by grid power; ii) waste heat rejected by an absorption refrigeration unit driven by solar collectors; and iii) waste heat rejected by an absorption refrigeration unit supported by a photovoltaic array. Merits of utilizing solar energy and process waste heat in reducing energy consumption and greenhouse gas emissions are discussed in detail.

Original languageEnglish (US)
Pages (from-to)78-85
Number of pages8
JournalEnergy
Volume36
Issue number1
DOIs
StatePublished - Jan 2011
Externally publishedYes

Fingerprint

Waste heat
Desalination
Solar energy
Sustainable development
Absorption refrigeration
Solar collectors
Gas emissions
Greenhouse gases
Temperature
Energy utilization
Thermodynamics
Vacuum
Water

Keywords

  • Desalination
  • Renewable energy
  • Solar energy
  • Solar still
  • Sustainability
  • Thermal energy storage

ASJC Scopus subject areas

  • Energy(all)
  • Pollution

Cite this

Desalination using solar energy : Towards sustainability. / Gude, Veera Gnaneswar; Nirmalakhandan, Nagamany; Deng, Shuguang.

In: Energy, Vol. 36, No. 1, 01.2011, p. 78-85.

Research output: Contribution to journalArticle

Gude, Veera Gnaneswar ; Nirmalakhandan, Nagamany ; Deng, Shuguang. / Desalination using solar energy : Towards sustainability. In: Energy. 2011 ; Vol. 36, No. 1. pp. 78-85.
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