Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site
In order to increase the production of energy at the Soultz-sous-Forêts power plant (Rhine Graben, France), a prototype heat exchanger in which 10% of the whole water flow was diverted has been tested for decreasing the temperature from 70°C to 40°C. After 3 months of operation, it was opened for sa...
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ftzenodo:oai:zenodo.org:5786688 2024-09-15T18:14:38+00:00 Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site Ledésert, Béatrice A. Sengelen, Xavier Hébert, Ronan L. Seibel, Olivier Mouchot, Justine Bosia, Clio Ravier, Guillaume 2021-05-02 https://doi.org/10.5281/zenodo.5786688 eng eng Zenodo https://zenodo.org/communities/eu_project_meet https://zenodo.org/communities/eu https://doi.org/10.5281/zenodo.5786687 https://doi.org/10.5281/zenodo.5786688 oai:zenodo.org:5786688 info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial Share Alike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode WGC2020+1, World Geothermal Congress 2020+1, Online and On-Site in Reykjavik, April - October 2021 Soultz-sous-Forêts heat exchanger scales chemistry scanning electron microscope info:eu-repo/semantics/conferencePaper 2021 ftzenodo https://doi.org/10.5281/zenodo.578668810.5281/zenodo.5786687 2024-07-27T05:57:06Z In order to increase the production of energy at the Soultz-sous-Forêts power plant (Rhine Graben, France), a prototype heat exchanger in which 10% of the whole water flow was diverted has been tested for decreasing the temperature from 70°C to 40°C. After 3 months of operation, it was opened for sampling of scales (deposited in the tubes and water boxes) and study of corrosion. The prototype heat exchanger has been designed with 6 different metallurgies (1.4539, 1.4547, 1.4462, 1.4410, 2.4858, TiGr.2) as described by Ravier et al. (2019). Due to high service conditions (150°C and 25 bar, high salinity brine) and the risk of scale formation, all the geothermal plants in operation in the Rhine Graben are designed with shell and tube heat exchangers. The prototype heat exchanger was designed according to this technology. The alloy 1.4410 is the steel alloy currently used in the heat exchangers of the Soultz industrial power plant. The other metallurgies were already tested in extreme conditions in Iceland (Karlsdottir et al., 2014; 2015) and gave good results. The aim of this work is to present chemistry data about scales related to the different metallurgies, acquired with Inductively Coupled Plasma-Mass Spectrometry (ICP-MS; reference sample), X-ray Fluorescence (XRF; 6 metallurgies tested during 3 months) and Scanning Electron Microscopy coupled with an Energy Dispersive Sprectrometer (SEM-EDS; all samples). The reference sample (obtained in normal industrial conditions in contact with 1.4410 alloy) contains mainly Pb (70%), Sb, As, S, Na, Fe and Ca. In Ti metallurgy, small spheres bearing Ti (probably TiO 2 ) are found in the scales at both the contact with tube and with the fluid whatever the temperature tested; when the temperature is lowered, the amount of Ti in the scales, obtained by XRF, decreases. As and Sb tend to increase in scales when the temperature decreases, whatever the metallurgy, while Pb and Cu tend to decrease, or decrease and then increase, depending on the metallurgy. According to XRF ... Conference Object Iceland Zenodo |
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op_collection_id |
ftzenodo |
language |
English |
topic |
Soultz-sous-Forêts heat exchanger scales chemistry scanning electron microscope |
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Soultz-sous-Forêts heat exchanger scales chemistry scanning electron microscope Ledésert, Béatrice A. Sengelen, Xavier Hébert, Ronan L. Seibel, Olivier Mouchot, Justine Bosia, Clio Ravier, Guillaume Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
topic_facet |
Soultz-sous-Forêts heat exchanger scales chemistry scanning electron microscope |
description |
In order to increase the production of energy at the Soultz-sous-Forêts power plant (Rhine Graben, France), a prototype heat exchanger in which 10% of the whole water flow was diverted has been tested for decreasing the temperature from 70°C to 40°C. After 3 months of operation, it was opened for sampling of scales (deposited in the tubes and water boxes) and study of corrosion. The prototype heat exchanger has been designed with 6 different metallurgies (1.4539, 1.4547, 1.4462, 1.4410, 2.4858, TiGr.2) as described by Ravier et al. (2019). Due to high service conditions (150°C and 25 bar, high salinity brine) and the risk of scale formation, all the geothermal plants in operation in the Rhine Graben are designed with shell and tube heat exchangers. The prototype heat exchanger was designed according to this technology. The alloy 1.4410 is the steel alloy currently used in the heat exchangers of the Soultz industrial power plant. The other metallurgies were already tested in extreme conditions in Iceland (Karlsdottir et al., 2014; 2015) and gave good results. The aim of this work is to present chemistry data about scales related to the different metallurgies, acquired with Inductively Coupled Plasma-Mass Spectrometry (ICP-MS; reference sample), X-ray Fluorescence (XRF; 6 metallurgies tested during 3 months) and Scanning Electron Microscopy coupled with an Energy Dispersive Sprectrometer (SEM-EDS; all samples). The reference sample (obtained in normal industrial conditions in contact with 1.4410 alloy) contains mainly Pb (70%), Sb, As, S, Na, Fe and Ca. In Ti metallurgy, small spheres bearing Ti (probably TiO 2 ) are found in the scales at both the contact with tube and with the fluid whatever the temperature tested; when the temperature is lowered, the amount of Ti in the scales, obtained by XRF, decreases. As and Sb tend to increase in scales when the temperature decreases, whatever the metallurgy, while Pb and Cu tend to decrease, or decrease and then increase, depending on the metallurgy. According to XRF ... |
format |
Conference Object |
author |
Ledésert, Béatrice A. Sengelen, Xavier Hébert, Ronan L. Seibel, Olivier Mouchot, Justine Bosia, Clio Ravier, Guillaume |
author_facet |
Ledésert, Béatrice A. Sengelen, Xavier Hébert, Ronan L. Seibel, Olivier Mouchot, Justine Bosia, Clio Ravier, Guillaume |
author_sort |
Ledésert, Béatrice A. |
title |
Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
title_short |
Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
title_full |
Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
title_fullStr |
Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
title_full_unstemmed |
Scale Analysis in the Framework of Optimization of Energy Production at the Soultz-sous- Forêts EGS Site |
title_sort |
scale analysis in the framework of optimization of energy production at the soultz-sous- forêts egs site |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5281/zenodo.5786688 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
WGC2020+1, World Geothermal Congress 2020+1, Online and On-Site in Reykjavik, April - October 2021 |
op_relation |
https://zenodo.org/communities/eu_project_meet https://zenodo.org/communities/eu https://doi.org/10.5281/zenodo.5786687 https://doi.org/10.5281/zenodo.5786688 oai:zenodo.org:5786688 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial Share Alike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.578668810.5281/zenodo.5786687 |
_version_ |
1810452415763185664 |