Next Article in Journal
Statistical Ensemble Theory of Gompertz Growth Model
Next Article in Special Issue
Using Exergy to Understand and Improve the Efficiency of Electrical Power Technologies
Previous Article in Journal
The Languages of Neurons: An Analysis of Coding Mechanisms by Which Neurons Communicate, Learn and Store Information
Previous Article in Special Issue
Determination of the Real Loss of Power for a Condensing and a Backpressure Turbine by Means of Second Law Analysis
Article Menu

Export Article

Open AccessArticle

Exergy as a Useful Variable for Quickly Assessing the Theoretical Maximum Power of Salinity Gradient Energy Systems

Institut de Recherche d’Hydro-Québec, Laboratoire des technologies de l’énergie, 600 de la Montagne ave, Shawinigan, Quebec G9N 7N5, Canada
Entropy 2009, 11(4), 798-806;
Received: 14 September 2009 / Accepted: 3 November 2009 / Published: 5 November 2009
(This article belongs to the Special Issue Exergy: Analysis and Applications)
PDF [219 KB, uploaded 24 February 2015]


It is known that mechanical work, and in turn electricity, can be produced from a difference in the chemical potential that may result from a salinity gradient. Such a gradient may be found, for instance, in an estuary where a stream of soft water is flooding into a sink of salty water which we may find in an ocean, gulf or salt lake. Various technological approaches are proposed for the production of energy from a salinity gradient between a stream of soft water and a source of salty water. Before considering the implementation of a typical technology, it is of utmost importance to be able to compare various technological approaches, on the same basis, using the appropriate variables and mathematical formulations. In this context, exergy balance can become a very useful tool for an easy and quick evaluation of the maximum thermodynamic work that can be produced from energy systems. In this short paper, we briefly introduce the use of exergy for enabling us to easily and quickly assess the theoretical maximum power or ideal reversible work we may expect from typical salinity gradient energy systems. View Full-Text
Keywords: exergy; salinity gradient energy systems; electric power exergy; salinity gradient energy systems; electric power

Figure 1

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Labrecque, R. Exergy as a Useful Variable for Quickly Assessing the Theoretical Maximum Power of Salinity Gradient Energy Systems. Entropy 2009, 11, 798-806.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top