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成果報告書詳細
管理番号20170000000486
タイトル*平成27年度中間年報 地熱発電技術研究開発 地熱発電の導入拡大に資する革新的技術開発 地熱発電プラントのリスク評価・対策手法の研究開発(スケール/腐食等予測・対策管理)
公開日2018/6/2
報告書年度2015 - 2015
委託先名地熱技術開発株式会社 国立研究開発法人産業技術総合研究所 エヌケーケーシームレス鋼管株式会社
プロジェクト番号P13009
部署名新エネルギー部
和文要約
英文要約Summary:
(1) Integration of Geothermal Power Plant Risk Assessment System
GERD conducted the following activities in 2016.
a)Survey of Geothermal Power Plant Risk Assessment SystemRegarding the information on overseas advanced cases, we obtained the evaluation table of Excel version for New Zealand evaluation system, which has been under development in particular, and based on that evaluation table of Japanese version was created and reflected in the basic design.
b)Basic Design of Geothermal Power Plant Risk Assessment System
As a basic design of a geothermal power plant risk assessment system that integrates each basic module of prediction technology, database, risk assessment system, and monitoring system, corrosion cases in two-phase piping in two acidic survey wells in Yanaizu-Nishiyama and Siramizukoe for performance evaluation of each module, confirmation of a series of work procedures, and the result was reflected in the basic design.
(2) Development of Corrosion, Erosion and Scale Prediction Technology
GERD conducted the following activities in 2016.
c) Development of geochemical reaction simulator
In the geochemical equilibrium reaction simulation, we improved the stability of the calculation by improving the module (FORTRAN code) that can be calculated by fluid flow and at the same time incorporate the following CFD calculation result so that it can be studied .
d) Construction and verification of well-flowing flow model by OpenFOAM
Flow numerical analysis of gas-liquid multiphase flow in a pipe was carried out for two-phase flow piping. As an analysis method, the Euler multiphase flow model of the open source CFD simulator OpenFOAM 2.3.0 was used following FY2014.
e) Prediction of scale sediment volume and spatial distribution in well borehole by lattice Boltzmann method.
In order to numerically evaluate the importance of the physical sedimentation process considering the influence of the flow rate in order to consider the scale sedimentation process on a microscopic scale, we focused on the mechanism of silica scale deposition.
(3) Development of Corrosion and Scale Database
AIST conducted the following activities in 2016.
f) Several research about corrosion in the geothermal field was reviewed from AIST Tohoku activity from 1974 to 2002. Especially, using pH, temperature and Cr equivalent of material calculated by several element composition of material, the estimation of the corrosion rate will be carried out. As the basis for this, we made the system of calculating the corrosion rate.
g) We attended WGC2015 at Melbourne, GRC2015 at Reno and Stanford geothermal workshop.
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