Factors controlling the termination of a 3-Mw-pilot power plant in the Chingshui Geothermal Field, Taiwan

Yi Chia Lu*, Sheng Rong Song, Chia Mei Liu, En Chai Yeh

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Taiwan is located at the margin of young orogenic belt which the Philippine Sea plate collides with Asian continental margin. It is characteristic that the geothermal outcrops and hot springs are widely distributed in this island and has great potential to explore and develop the geothermal heat for power plant. A 3-Mw pilot power plant, therefore, was constructed in 1981 in the Chingshui area, northeastern Taiwan. However, due to rapid decline of power generation from 1.2 Mw to 0.2 Mw and shortage of economic efficiency, this plant was terminated in 1993. Most of the engineers and researchers considered the important reason for termination may be resulted from carbonate scaling, based on the findings of calcite deposits inside well pipe. In 2005, the Bureau of Energy of Taiwan restarted geothermal exploration and developed a plan for future power generation in the Chingshui geothermal field. A production well with the depth 1,500 m has been drilled into the reservoir of slate host rocks and raises 200 m cores between 600 m to 800 m in depth. Many calcite or aragonite minerals filled up the fractures, veins and open cracks have been found in the cores. Meanwhile, surface survey on outcrops shows that there are many quartz veins occurred in slate formation, but a few or no calcite veins. Those lines of evidence strongly suggest that the termination of power plant in the Chingshui geothermal field is due to formation scaling rather than carbonate precipitations inside the wells. A solution reducing the formation scaling will be sought in the future to restart power generation of the Chingshui geothermal field.

    Original languageEnglish
    Title of host publicationGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
    Pages1195-1199
    Number of pages5
    Publication statusPublished - 2011 Dec 1
    EventGeothermal Resources Council Annual Meeting 2011, Geothermal 2011 - San Diego, CA, United States
    Duration: 2011 Oct 232011 Oct 26

    Publication series

    NameTransactions - Geothermal Resources Council
    Volume35 2
    ISSN (Print)0193-5933

    Other

    OtherGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
    Country/TerritoryUnited States
    CitySan Diego, CA
    Period2011/10/232011/10/26

    Keywords

    • Carbonate scaling
    • Chingshui geothermal field
    • Drilling
    • Production well
    • Taiwan
    • Veins

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Energy Engineering and Power Technology
    • Geophysics

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