Next Article in Journal
Analysis of Free and Combined Chlorine Concentrations in Swimming Pool Water and an Attempt to Determine a Reliable Water Sampling Point
Next Article in Special Issue
A Transport-Phenomena Approach to Model Hydrodynamic Cavitation of Organic Pollutants
Previous Article in Journal
Comprehensive Assessment Methodology for Urban Residential Rainwater Tank Implementation
Previous Article in Special Issue
Reduction of Fouling and Scaling by Calcium Ions on an UF Membrane Surface for an Enhanced Water Pre-Treatment
Open AccessArticle

Reuse of Waste Geothermal Brine: Process, Thermodynamic and Economic Analysis

1
Unit of Process Engineering, Department of Engineering, University Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy
2
Unit of Chemical-physics Fundamentals in Chemical Engineering, Department of Engineering, University Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 316; https://doi.org/10.3390/w12020316
Received: 18 November 2019 / Revised: 2 January 2020 / Accepted: 15 January 2020 / Published: 21 January 2020
(This article belongs to the Special Issue Technologies for Water Reuse: Current Status and Future Challenges)
Geothermal brines can be a resource of energy, freshwater and minerals. Even when rejected after their exploitation to produce energy in a power plant, the brines can be a source of freshwater and minerals, and can have a residual enthalpy that can be recovered to produce additional power. The different reuse scenarios of these wasted brines depend on the composition and temperature at which they must be reinjected into the wells. On this basis, geothermal energy production is a perfect case study to investigate the water–energy nexus and to optimize the integrated energy- and water-production processes. In this paper, two case studies of brine reuse for both energy and water production are presented with the related process analysis, basic design and technical–economic analysis. A methodology to evaluate the exergy efficiency of the processes is presented by analyzing minimum work of separation, the maximum achievable work and the additional primary energy required for integrated production. The novel approach to estimate the process efficiency for integrated geothermal energy and desalination plants is applied to the case studies and discussed in light of literature results. View Full-Text
Keywords: exergy analysis; geothermal energy; desalination; organic Rankine cycle; mechanical vapor compression; wastewater exergy analysis; geothermal energy; desalination; organic Rankine cycle; mechanical vapor compression; wastewater
Show Figures

Figure 1

MDPI and ACS Style

Capocelli, M.; Moliterni, E.; Piemonte, V.; De Falco, M. Reuse of Waste Geothermal Brine: Process, Thermodynamic and Economic Analysis. Water 2020, 12, 316.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop