logo

GEOTHERMAL POWER PRODUCTION UTILIZING SUPERCRITICALCOz COMBINEDWITHDEEPEARTHCARBONSEQUESTRATION

PDF Publication Title:

GEOTHERMAL POWER PRODUCTION UTILIZING SUPERCRITICALCOz COMBINEDWITHDEEPEARTHCARBONSEQUESTRATION ( geothermal-power-production-utilizing-supercriticalcoz-combi )

Next Page View | Return to Search List

Text from PDF Page: 001

GEOTHERMAL POWER PRODUCTION UTILIZING SUPERCRITICALCOz COMBINEDWITHDEEPEARTHCARBONSEQUESTRATION Donald W. Brown Earth and Environmental Sciences Division, MS-D443 Los Alamos National Laboratory Los Alamos, NM 87545 KEYWORDS: hot-dry-rock (HDR) geothermal energy, heat mining using supercritical carbon dioxide, deepearth carbon sequestration ABSTRACT For equivalent levels of electric power production, a deep man-made geothermal reservoir designed to supply the heat requirements for power generation would sequester, per unit time, about as much COz as that produced by a typical coal-fired power plant. The deep earth carbon sequestration would be accomplished by the gradual diffusion of CO2 into the unfractured rock mass surrounding the highly presswized geothermal reservoir. INTRODUCTION A new engineered geothermal energy concept using supercritical COz (SCCO2) to both create the man-made geothermal reservoir and for heat transport to the surface is here proposed. This concept builds on the extensive Hot Dry Rock (HDR) research and development effort conducted by Los Alamos National Laboratory (LANL) at Fenton Hill, NM. This previous field testing convincingly demonstrated the viability of the HDR heat-mining concept, based on the results obtained from the production testing of two separate confined reservoirs for almost a year each. However, using S C C Q instead of water in a closed-loop HDR system offers three significant advantages over the original Los Alamos concept: The very significant wellbore density difference between the cold SCCO2 in the injection well (about 0.96 glcc) and the hot SCCO2 in the production wells (about 0.39 glcc) would provide a very large buoyant drive (Le., thermal siphoning), markedly reducing the circulating pumping power requirements over those of a comparable water-based HDR system. The inability of SCCO2 to dissolve and transport mineral species from the geothermal reservoir to the surface would eliminate scaling in the surface piping, heat exchangers, and other surface equipment. HDR reservoirs at temperatures in excess of 374°C (the critical temperature for water) could be developed without the problems associated with silica dissolution in water-based systems, potentially providing increased thermodynamic efficiency for the surface power-conversion equipment. Thermodynamic and systems analyses show that SCCO2, because of its unique properties, is nearly as good as water when used for heat mining from a confined HDR reservoir (see Brown, 2000). Even though the mass heat capacity of SCCOz is only two-fifths that of water, for equivalent reservoir operating conditions, the ratio of fluid density to viscosity (a measure of the reservoir flow potential) is 1.5 times greater for SCCO2 than for water, primarily due to the viscosity of SCCO2 which is 40% that of water. Therefore, the rate of geothermal energy production using SCCOz would be about 60% that of water. However, on a net power production basis, when pumping power requirements are considered, the power production from an SCCOz-HDR system would almost equal that of a water-based HDR system. The commercial development of this new renewable energy concept, given the ubiquitous worldwide distribution of the HDR geothermal resource, could be a significant contributor to providing clean, renewable sources of energy for the 21st century. Further, this new geothermal energy concept would help in mitigating global warming since a supercritical-COz-baed HDR system would also sequester significant amounts of COz deep in the earth by fluid diffusion into the rock mass surrounding the reservoir. To put this statement in perspective: Such an HDR power plant, based on long-term reservoir pressurizatiodfluid-loss studies carried out by LANL at Fenton Hill, would have the capability of continuously sequestering, by fluid diffusion into the rock mass surrounding the HDR reservoir, about as much COz as that produced by a typical coal- tired power plant, each on a per MW-electric generation basis [24 tons of COz per day per MW(e)l. 766

PDF Image | GEOTHERMAL POWER PRODUCTION UTILIZING SUPERCRITICALCOz COMBINEDWITHDEEPEARTHCARBONSEQUESTRATION

geothermal-power-production-utilizing-supercriticalcoz-combi-001

PDF Search Title:

GEOTHERMAL POWER PRODUCTION UTILIZING SUPERCRITICALCOz COMBINEDWITHDEEPEARTHCARBONSEQUESTRATION

Original File Name Searched:

45_4_WASHINGTON_DC_08_00_0766.pdf

DIY PDF Search: Google It | Yahoo | Bing

NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info

IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info

Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info

Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info

Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info

NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info

Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP