Transport mechanisms within thermally-shocked region of an enhanced geothermal system (egs)

Kamran Jahan Bakhsh, Masami Nakagawa, Mahmood Arshad, Lucila Dunnington

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抜粋

There is a consensus regarding the beneficial effects of thermally induced cracks in an EGS reservoir. Thermally induced cracks have proven to aid reservoir performance, hydrologically and thermally by lowering the flow impedance and increasing heat exchange surface area respectively. The commonly-practiced engineering approach neglects the benefits of the thermal cracks by excluding them from reservoir simulation. By ignoring the existence of thermally induced cracks, progress towards understanding the mechanism and extent of their contribution is hindered. This paper investigates the transport mechanism within a thermally-shocked region of the EGS reservoir to address the thermal crack contribution in a reservoir's performance. A porous medium with different length scales is recommended to simulate heat and mass transport within the thermally fractured region. The role of diffusion and convection in both heat and mass transport for the generated porous medium is discussed. The analysis shows that depending upon the degree of fragmentation of the thermally-fractured region, transport mechanisms will be different. A numerical example shows that for porous media, the heat and mass transport mechanisms change when the pore's length scale changes. The finding challenges the accepted notion that heat and mass transport are analogous on varying scales.

元の言語英語
ホスト出版物のタイトルGeothermal Energy Here and Now
ホスト出版物のサブタイトルSustainable, Clean, Flexible - Geothermal Resources Council 2016 Annual Meeting
出版者Geothermal Resources Council
ページ335-343
ページ数9
ISBN(電子版)0934412219
出版物ステータス出版済み - 1 1 2016
外部発表Yes
イベントGeothermal Resources Council 2016 Annual Meeting - Geothermal Energy Here and Now: Sustainable, Clean, Flexible, GRC 2016 - Sacramento, 米国
継続期間: 10 23 201610 26 2016

出版物シリーズ

名前Transactions - Geothermal Resources Council
40
ISSN(印刷物)0193-5933

その他

その他Geothermal Resources Council 2016 Annual Meeting - Geothermal Energy Here and Now: Sustainable, Clean, Flexible, GRC 2016
米国
Sacramento
期間10/23/1610/26/16

All Science Journal Classification (ASJC) codes

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

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  • これを引用

    Bakhsh, K. J., Nakagawa, M., Arshad, M., & Dunnington, L. (2016). Transport mechanisms within thermally-shocked region of an enhanced geothermal system (egs). : Geothermal Energy Here and Now: Sustainable, Clean, Flexible - Geothermal Resources Council 2016 Annual Meeting (pp. 335-343). (Transactions - Geothermal Resources Council; 巻数 40). Geothermal Resources Council.