Affiliation:
1. Laboratory of Applied Thermodynamics, School of Mechanical Engineering, National Technical University of Athens, 157 80 Athens, Greece
Abstract
The utilization of geological formations, distinguished by natural porosity and permeability and protected by low-permeability caprock, has emerged as an effective strategy for carbon dioxide (CO2) storage. This method significantly contributes to mitigating anthropogenic greenhouse gas emissions and addressing the challenges of climate change. Recent research has unveiled the potential of CO2 to enhance geothermal heat energy extraction in geothermal reservoirs by acting as a subsurface heat exchange fluid. This review paper explores the viability of CO2 in augmenting geothermal heat energy extraction, comparing it to conventional water-based geothermal systems. Special emphasis is placed on CO2 plume geothermal (CPG) systems, characterized by rapid deployment and long-term utilization of geothermal energy resources. With the overarching objective of establishing net-zero energy communities, the analysis of such systems offers a comprehensive understanding of their features, providing a fresh perspective on extracted energy within the context of energy supply in integrated, sustainable energy in built systems. Notably, these systems demonstrate efficacy in meeting the power requirements of an energy community, spanning both distinct heating and electricity needs. However, the key challenge lies in selecting suitable locations. This scientific review aims to comprehend the characteristics of CPG under specific temperature and pressure conditions while optimizing subsurface permeability. This insight is pivotal for identifying future locations for CPG operations with the intent of powering small energy communities.
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference85 articles.
1. Brown, D.W. (2000, January 24–26). A hot dry rock geothermal energy concept utilizing supercritical CO2 instead of water. Proceedings of the Twenty-Fifth Workshop on Geothermal Reservoir Engineering, Stanford, CA, USA.
2. Bielinski, A. (2007). Numerical Simulation of CO2 Sequestration in Geological Formations, Institut für Wasserbau, Universität Stuttgart. Mitteilungen.
3. Performance and Costs of Power Plants with Capture and Storage of CO2;Davison;Energy,2007
4. Systems Analysis, Design, and Optimization of Geothermal Energy Systems for Power Production and Polygeneration: State-of-the-Art and Future Challenges;Lee;Renew. Sustain. Energy Rev.,2019
5. Enhanced Geothermal Systems (EGS) Using CO2 as Working Fluid—A Novel Approach for Generating Renewable Energy with Simultaneous Sequestration of Carbon;Pruess;Geothermics,2006