@inproceedings{33f46461f2aa4450bf8caf51a5bc4087,
title = "Impact of reservoir permeability on the choice of subsurface geothermal heat exchange fluid: CO 2 versus water and native brine",
abstract = "Geothermal systems utilizing carbon dioxide (CO 2) as the subsurface heat exchange fluid in naturally porous, permeable geologic formations have been shown to provide improved geothermal heat energy extraction, even at low resource temperatures. Such systems, termed CO 2 Plume Geothermal (CPG) systems, have the potential to permit expansion of geothermal energy utilization while supporting rapid implementation through the use of existing technologies. Here, we explore CPG heat extraction as a function of reservoir permeability and in comparison to water and brine geothermal heat extraction. We show that for reservoir permeabilities below 2×10 -14 to 2×10 -13 m 2, depending on formation temperature and pressure, CPG provides better electric power production efficiency than both water- and brine-based systems.",
keywords = "CPG, Carbon dioxide sequestration, EGS, Geothermal, Heat transfer, Numerical simulation",
author = "Randolph, {Jimmy B} and Saar, {Martin O.}",
year = "2011",
month = dec,
day = "1",
language = "English (US)",
isbn = "9781618394828",
series = "Transactions - Geothermal Resources Council",
pages = "521--526",
booktitle = "Geothermal Resources Council Annual Meeting 2011, Geothermal 2011",
note = "Geothermal Resources Council Annual Meeting 2011, Geothermal 2011 ; Conference date: 23-10-2011 Through 26-10-2011",
}
