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Experimental study on low temperature desalination by flash evaporation in a novel compact chamber design

Stengler, Jana and Schaber, Karlheinz and Mall-Gleissle, Susanne (2018) Experimental study on low temperature desalination by flash evaporation in a novel compact chamber design. Desalination (448), pp. 103-112. Elsevier. DOI: 10.1016/j.desal.2018.09.021 ISSN 0011-9164

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The production of potable water in dry areas nowadays is mainly done by the desalination of seawater. State ofthe art desalination plants usually are built with high production capacities and consume a lot of electrical energy or energy from primary resources such as oil. This causes difficulties in rural areas, where no infrastructure is available neither for the plants' energy supply nor the distribution of the produced potable water. To address this need, small, self-sustaining and locally operated desalination plants came into the focus of research. In this work, a novel flash evaporator design is proposed which can be driven either by solar power or by low temperature waste heat. It offers low operation costs as well as easy maintenance. The results of an experimental setup operated with water at a feed flow rate of up to 1600 l/h are presented. It is shown that the proof of concept regarding efficient evaporation as well as efficient gas-liquid separation is provided successfully. The experimental evaporation yield counts for 98% of the vapor content that is expected from the vapor pressure curve of water. Neither measurements of the electrical conductivity of the gained condensate, nor the analysis of the vapor flow by optical methods show significant droplet entrainment, so there are no concerns regarding the purity of the produced condensate for the use as drinking water.

Item URL in elib:https://elib.dlr.de/122118/
Document Type:Article
Title:Experimental study on low temperature desalination by flash evaporation in a novel compact chamber design
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stengler, JanaJana.Stengler (at) dlr.dehttps://orcid.org/0000-0001-6124-8286
Schaber, KarlheinzKarlsruher Institut für Technologie (KIT)UNSPECIFIED
Mall-Gleissle, SusanneHochschule OffenburgUNSPECIFIED
Date:9 October 2018
Journal or Publication Title:Desalination
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.desal.2018.09.021
Page Range:pp. 103-112
Keywords:Flash evaporation; Flash chamber design; Seawater desalination; Waste heat utilization; Solar thermal energy
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Stengler, Jana
Deposited On:19 Oct 2018 12:41
Last Modified:06 Sep 2019 15:19

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