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EGS rock reactions with Supercritical CO2 saturated with water and water saturated with Supercritical CO2

Description: EGS using CO2 as a working fluid will likely involve hydro-shearing low-permeability hot rock reservoirs with a water solution. After that process, the fractures will be flushed with CO2 that is maintained under supercritical conditions (> 70 bars). Much of the injected water in the main fracture will be flushed out with the initial CO2 injection; however side fractures, micro fractures, and the lower portion of the fracture will contain connate water that will interact with the rock and the in… more
Date: February 1, 2013
Creator: Mattson, Earl D.; McLing, Travis L.; Smith, William & Palmer, Carl
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Simulated evolution of fractures and fracture networks subject to thermal cooling: A coupled discrete element and heat conduction model

Description: Advancement of EGS requires improved prediction of fracture development and growth during reservoir stimulation and long-term operation. This, in turn, requires better understanding of the dynamics of the strongly coupled thermo-hydro-mechanical (THM) processes within fractured rocks. We have developed a physically based rock deformation and fracture propagation simulator by using a quasi-static discrete element model (DEM) to model mechanical rock deformation and fracture propagation induced b… more
Date: February 1, 2013
Creator: Huang, Hai; Plummer, Mitchell & Podgorney, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation

Description: This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydrauli… more
Date: April 15, 2013
Creator: Rose, Peter Eugene
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phase 1 Feasibility Study, Canby Cascaded Geothermal Project, April 2, 2013

Description: A small community in Northern California is attempting to use a local geothermal resource to generate electrical power and cascade residual energy to an existing geothermal district heating system, greenhouse, and future fish farm and subsequent reinjection into the geothermal aquifer, creating a net-zero energy community, not including transportation.
Date: April 2, 2013
Creator: Merrick, Dale E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

COLLABORATIVE RESEARCH:USING ARM OBSERVATIONS & ADVANCED STATISTICAL TECHNIQUES TO EVALUATE CAM3 CLOUDS FOR DEVELOPMENT OF STOCHASTIC CLOUD-RADIATION

Description: The long-range goal of several past and current projects in our DOE-supported research has been the development of new and improved parameterizations of cloud-radiation effects and related processes, using ARM data, and the implementation and testing of these parameterizations in global models. The main objective of the present project being reported on here has been to develop and apply advanced statistical techniques, including Bayesian posterior estimates, to diagnose and evaluate features o… more
Date: August 22, 2013
Creator: Somerville, Richard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seismic Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks Final Report

Description: The objective of our research was to develop and demonstrate seismic data-acquisition and data-processing technologies that allow geothermal prospects below high-velocity rock outcrops to be evaluated. To do this, we acquired a 3-component seismic test line across an area of exposed high-velocity rocks in Brewster County, Texas, where there is high heat flow and surface conditions mimic those found at numerous geothermal prospects. Seismic contractors have not succeeded in creating good-quality… more
Date: February 28, 2013
Creator: Hardage, Bob A.; DeAngelo, Michael V.; Ermolaeva, Elena; Hardage, Bob A.; Remington, Randy; Sava, Diana et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recovery Act: Finite Volume Based Computer Program for Ground Source Heat Pump Systems

Description: This report is a compilation of the work that has been done on the grant DE-EE0002805 entitled “Finite Volume Based Computer Program for Ground Source Heat Pump Systems.” The goal of this project was to develop a detailed computer simulation tool for GSHP (ground source heat pump) heating and cooling systems. Two such tools were developed as part of this DOE (Department of Energy) grant; the first is a two-dimensional computer program called GEO2D a… more
Date: February 22, 2013
Creator: Menart, James A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-potential Working Fluids for Next Generation Binary Cycle Geothermal Power Plants

Description: A thermo-economic model has been built and validated for prediction of project economics of Enhanced Geothermal Projects. The thermo-economic model calculates and iteratively optimizes the LCOE (levelized cost of electricity) for a prospective EGS (Enhanced Geothermal) site. It takes into account the local subsurface temperature gradient, the cost of drilling and reservoir creation, stimulation and power plant configuration. It calculates and optimizes the power plant configuration vs. well dep… more
Date: June 29, 2013
Creator: Zia, Jalal; Sevincer, Edip; Chen, Huijuan; Hardy, Ajilli; Wickersham, Paul; Kalra, Chiranjeev et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microbial impacts on geothermometry temperature predictions

Description: Conventional geothermometry approaches assume that the composition of a collected water sample originating in a deep geothermal reservoir still reflects chemical equilibration of the water with the deep reservoir rocks. However, for geothermal prospecting samples whose temperatures have dropped to <120°C, temperature predictions may be skewed by the activity of microorganisms; microbial metabolism can drastically and rapidly change the water’s chemistry. We hypothesize that knowledge of microbi… more
Date: February 1, 2013
Creator: Fujita, Yoshiko; Reed, David W.; Nowak, Kaitlyn R.; Thompson, Vicki S.; McLing, Travis L. & Smith, Robert W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mountain Home Air Force Base, Idaho Geothermal Resource Assessment and Future Recommendations

Description: The U.S. Air Force is facing a number of challenges as it moves into the future, one of the biggest being how to provide safe and secure energy to support base operations. A team of scientists and engineers met at Mountain Home Air Force Base in early 2011 near Boise, Idaho, to discuss the possibility of exploring for geothermal resources under the base. The team identified that there was a reasonable potential for geothermal resources based on data from an existing well. In addition, a regiona… more
Date: March 1, 2013
Creator: Armstrong, Joseph C.; Breckenridge, Robert P.; Nielson, Dennis L.; Shervais, John W. & Wood, Thomas R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beowawe Bottoming Binary Unit - Final Technical Report for EE0002856

Description: This binary plant is the first high-output refrigeration based waste heat recovery cycle in the industry. Its working fluid is environmentally friendly and as such, the permits that would be required with a butane based cycle are not necessary. The unit is modularized, meaning that the unit’s individual skids were assembled in another location and were shipped via truck to the plant site. This project proves the technical feasibility of using low temperature brine The development of the unit le… more
Date: February 12, 2013
Creator: McDonald, Dale Edward
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hybrid Cooling for Geothermal Power Plants: Final ARRA Project Report

Description: Many binary-cycle geothermal plants use air as the heat rejection medium. Usually this is accomplished by using an air-cooled condenser (ACC) system to condense the vapor of the working fluid in the cycle. Many air-cooled plants suffer a loss of production capacity of up to 50% during times of high ambient temperatures. Use of limited amounts of water to supplement the performance of ACCs is investigated. Deluge cooling is found to be one of the least-cost options. Limiting the use of water in … more
Date: June 1, 2013
Creator: Bharathan, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation

Description: This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydrauli… more
Date: April 15, 2013
Creator: Rose, Peter Eugene
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Development of Metric for Measuring the Impact of RD&D Funding on GTO's Geothermal Exploration Goals

Description: The Department of Energy's Geothermal Technologies Office (GTO) provides RD&D funding for geothermal exploration technologies with the goal of lowering the risks and costs of geothermal development and exploration. In 2012, NREL was tasked with developing a metric to measure the impacts of this RD&D funding on the cost and time required for exploration activities. The development of this metric included collecting cost and time data for exploration techniques, creating a baseline suite of explo… more
Date: April 1, 2013
Creator: Jenne, S.; Young, K. R. & Thorsteinsson, H.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
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