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Chanjuan Han-Ph.D thesis.pdf (7.04 MB)

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Advanced Multiphysics Simulation and Characterization for the Multifunctional and Innovative Design of Energy Geosystem

Han, Chanjuan
http://rave.ohiolink.edu/etdc/view?acc_num=case1524139196492659

Abstract Details

2018, Doctor of Philosophy, Case Western Reserve University, Civil Engineering.
Energy geosystem (i.e., geothermal heat pump system, energy geostructure) features the advantages of low carbon footprint, low maintenance requirements, environmentally friendliness, and wide applicability. These make it appealing for both residential and commercial building applications. However, the existing design code does not lead to the cost-effective system, which is too large extent due to the limited understanding of the associated thermo-hydro-mechanical behaviors under long-term cyclic thermal loads. Consequently, the high installation cost presents a major barrier for its wide applications. This dissertation aims to develop innovative strategies to effectively utilize the shallow depth geothermal energy. Accordingly, the critical cost barrier is alleviated from the in-depth understanding of the fundamentals. This dissertation covers both experimental characterization and numerical modeling to understand the fundamental mechanism of energy geosystem. Starting with the experimental characterization of a GCHP system installed in sedimentary rock formation under a residential house, the dissertation has the solid basis to implement the numerical modeling based on the prototype. Subsequently, with the advanced multiphysics simulation platform, innovative strategies to optimize the energy geosystem design are explored, which include identifying key influencing factors, applying optimal operation strategies, integrating field data, and utilizing multifunctional materials. Meanwhile, the soil-structure interaction under non-isothermal conditions as well as end restraint effects of energy pile are also investigated, which provides insight on the energy pile behaviors and offers guidance for the practical design. The results of this study hold great promise in significantly reducing the design and construction cost associated with the geothermal heat exchangers (GHEs). Furthermore, the simulation platform is also utilized to explore the other engineering application, such as geothermal pavement snow-melting system. This dissertation proposes a simulation-based approach to evaluate the feasibility of an energy pile based bridge deck snow melting system in the different regions of United States. Additionally, an innovative design of phase change material (PCM) modified energy pile based snow melting system is introduced to extend its application regions.
Xiong (Bill) Yu (Committee Chair)
Xiangwu Zeng (Committee Member)
Yue Li (Committee Member)
Bo Li (Committee Member)
Yasuhiro Kamotani (Committee Member)
212 p.
Civil Engineering

Recommended Citations

Citations

  • Han, C. (2018). Advanced Multiphysics Simulation and Characterization for the Multifunctional and Innovative Design of Energy Geosystem [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1524139196492659

    APA Style (7th edition)

  • Han, Chanjuan. Advanced Multiphysics Simulation and Characterization for the Multifunctional and Innovative Design of Energy Geosystem. 2018. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1524139196492659.

    MLA Style (8th edition)

  • Han, Chanjuan. "Advanced Multiphysics Simulation and Characterization for the Multifunctional and Innovative Design of Energy Geosystem." Doctoral dissertation, Case Western Reserve University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1524139196492659

    Chicago Manual of Style (17th edition)

case1524139196492659
134
© 2018, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.