Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water

Abstract We present a novel fiber optic sensor for real-time sensing of silica scale formation in geothermal water. The sensor is fabricated by removing the cladding of a multimode fiber to expose the core to detect the scale-formation-induced refractive index change. A simple experimental setup was...

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Autores principales:	Takuya Okazaki, Tatsuya Orii, Akira Ueda, Akiko Ozawa, Hideki Kuramitz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6afa830d82a549238d5b9fb0f328dfe3
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spelling	oai:doaj.org-article:6afa830d82a549238d5b9fb0f328dfe32021-12-02T12:32:44ZFiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water10.1038/s41598-017-03530-12045-2322https://doaj.org/article/6afa830d82a549238d5b9fb0f328dfe32017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03530-1https://doaj.org/toc/2045-2322Abstract We present a novel fiber optic sensor for real-time sensing of silica scale formation in geothermal water. The sensor is fabricated by removing the cladding of a multimode fiber to expose the core to detect the scale-formation-induced refractive index change. A simple experimental setup was constructed to measure the transmittance response using white light as a source and a spectroscopy detector. A field test was performed on geothermal water containing 980 mg/L dissolved silica at 93 °C in Sumikawa Geothermal Power Plant, Japan. The transmittance response of the fiber sensor decreased due to the formation of silica scale on the fiber core from geothermal water. An application of this sensor in the evaluation of scale inhibitors was demonstrated. In geothermal water containing a pH modifier, the change of transmittance response decreased with pH decrease. The effectiveness of a polyelectrolyte inhibitor in prevention of silica scale formation was easily detectable using the fiber sensor in geothermal water.Takuya OkazakiTatsuya OriiAkira UedaAkiko OzawaHideki KuramitzNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takuya Okazaki Tatsuya Orii Akira Ueda Akiko Ozawa Hideki Kuramitz Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
description	Abstract We present a novel fiber optic sensor for real-time sensing of silica scale formation in geothermal water. The sensor is fabricated by removing the cladding of a multimode fiber to expose the core to detect the scale-formation-induced refractive index change. A simple experimental setup was constructed to measure the transmittance response using white light as a source and a spectroscopy detector. A field test was performed on geothermal water containing 980 mg/L dissolved silica at 93 °C in Sumikawa Geothermal Power Plant, Japan. The transmittance response of the fiber sensor decreased due to the formation of silica scale on the fiber core from geothermal water. An application of this sensor in the evaluation of scale inhibitors was demonstrated. In geothermal water containing a pH modifier, the change of transmittance response decreased with pH decrease. The effectiveness of a polyelectrolyte inhibitor in prevention of silica scale formation was easily detectable using the fiber sensor in geothermal water.
format	article
author	Takuya Okazaki Tatsuya Orii Akira Ueda Akiko Ozawa Hideki Kuramitz
author_facet	Takuya Okazaki Tatsuya Orii Akira Ueda Akiko Ozawa Hideki Kuramitz
author_sort	Takuya Okazaki
title	Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
title_short	Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
title_full	Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
title_fullStr	Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
title_full_unstemmed	Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water
title_sort	fiber optic sensor for real-time sensing of silica scale formation in geothermal water
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6afa830d82a549238d5b9fb0f328dfe3
work_keys_str_mv	AT takuyaokazaki fiberopticsensorforrealtimesensingofsilicascaleformationingeothermalwater AT tatsuyaorii fiberopticsensorforrealtimesensingofsilicascaleformationingeothermalwater AT akiraueda fiberopticsensorforrealtimesensingofsilicascaleformationingeothermalwater AT akikoozawa fiberopticsensorforrealtimesensingofsilicascaleformationingeothermalwater AT hidekikuramitz fiberopticsensorforrealtimesensingofsilicascaleformationingeothermalwater
_version_	1718393983203278848

Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water

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