The Open Chemical Engineering Journal




ISSN: 1874-1231 ― Volume 13, 2019

Mass and Heat Transfer at Different Heat Exchange Surfaces and Their Suitability for Use in Thermal Desalination Plants



T. Schwarzer1, *, H.J. Bart2
1 Forschungszentrum Jülich, Wilhelm-Johnen-Str., 52428 Jülich, Germany
2 Chair of Separation Science and Technology, University of Kaiserslautern, D-67663 Kaiserslautern, Germany

Abstract

A new concept for small scale multi-stage distillation (MSD) desalination plants is presented allowing an installation in remote rural areal due to low maintenance, operating and investment costs. It is based on extensive studies on heat and mass transfer using 6 different condensation / heat transfer surfaces or material combinations. Basically all 6 condensation surfaces except glass are of a sheet metal or an expanded metal (to the evaporation side) in combination to an acid- and heat-resistant foil (on the salt water side). The basic experiments were performed in a "lab scale" unit to determine their thermodynamic and structural characteristics and user-friendliness. After validation in a prototype novel oxidic condensation surfaces (AF) and material combinations are in actual use in the new MSD systems, following the requirements, including a good wetting and condensation behavior and a good heat transfer.

Keywords: Distillate, Drinking water, Dripping back losses, Heat and mass-transfer, Multi-stage, Scaling, Solar thermal desalination.


Article Information


Identifiers and Pagination:

Year: 2016
Volume: 10
First Page: 74
Last Page: 86
Publisher Id: TOCENGJ-10-74
DOI: 10.2174/1874123101610010074

Article History:

Received Date: 20/10/2015
Revision Received Date: 15/03/2016
Acceptance Date: 16/03/2016
Electronic publication date: 03/06/2016
Collection year: 2016

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© Schwarzer and Bart; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.


Correspondence: Address correspondence to this author at the Projektträger Jülich, Erneuerbare Energien, Photovoltaik, Solarthermie (EEN1), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; Tel: 02461 61-9157; Fax: 02461 61- 2840; Email: t.schwarzer@fz-juelich.de


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