Heat transfer optimization of SCO2porous flow based on Brinkman model

David T.W Lin,Bo Yen Shih,Jui Ching Hsieh

doi:10.1051/matecconf/20167102004

Abstract

The purpose of this study is to obtain the optimal operating condition in order to find the maximum supercritical CO2 heat extraction in the enhanced geothermal system (EGS). In this study, the heat transfer model conjugated with the Brinkman model is used to evaluate the thermal behavior in the reservoir of the EGS. This numerical model is validated by experiment. Optimization is processed based on the Nelder-Mead approach. The optimal operating conditions are proposed with different pressure, porosity. This study will build the optimal platform of heat source of geothermal power plant.

Highlights

With the progress of science and technology rapidly, the energy growing is emphasized gradually
The deep geothermal power generation technology common with enhanced geothermal system and closed-loop heat collection system (CEEG).The principle of EGS is to inject the fluid with high pressure for generating the multiple artificial fractures under heat reservoir
The purpose of this study proposes an integrated method which combined experiment, optimal scheme to obtain the maximum heat extraction of CO2-EGS in the reservoir

Summary

Introduction

With the progress of science and technology rapidly, the energy growing is emphasized gradually. The renewable energy such as the geothermal energy continues to be upgraded For this reason, many countries begin to support the research of geothermal energy and hope to obtain the better low-cost power generation. The deep geothermal power generation technology common with enhanced geothermal system and closed-loop heat collection system (CEEG).The principle of EGS is to inject the fluid with high pressure for generating the multiple artificial fractures under heat reservoir. Water is first applied on the EGS as the working fluid for its high latent heat, specific enthalpy and cheap cost. A number of disadvantages have to overcome, the main ones are viscosity coefficient and density.

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Results

Conclusion