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in creator/contributor: "Hadgu, Teklu"  
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Determination of HEat Capacity of Yucca Mountain Strtigraphic Layers

Description: The heat generated from the radioactive waste to be placed in the proposed geologic repository at Yucca Mountain, Nevada, will affect the thermal-hydrology of the Yucca Mountain stratigraphic layers. In order to assess the effect of the movement of repository heat into the fractured rocks accurate determination of thermodynamic and hydraulic properties is important. Heat capacity is one of the properties that are required to evaluate energy storage in the fractured rock. Rock-grain heat capacit… more
Date: June 20, 2006
Creator: Hadgu, Teklu; Lum, Clinton & Bean, James E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a dual-porosity model for vapor-dominated fractured geothermal reservoirs using a semi-analytical fracture/matrix interaction term

Description: A new type of dual-porosity model is being developed to simulate two-phase flow processes in fractured geothermal reservoirs. At this time it is assumed that the liquid phase in the matrix blocks remains immobile. By utilizing the effective compressibility of a two-phase water/steam mixture in a porous rock, flow within the matrix blocks can be modeled by a single diffusion equation. This equation in turn is replaced by a nonlinear ordinary differential equation that utilizes the mean pressure … more
Date: January 28, 1993
Creator: Zimmerman, Robert W.; Hadgu, Teklu & Bodvarsson, Gudmundur S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Theoretical studies of flowrates from slimholes and production-size geothermal wells

Description: The relationship between production rates of large diameter geothermal production wells, and slimholes, is studied. The analysis is based on wells completed in liquid-dominated geothermal fields, where flashing occurs either in the wellbore or at the surface. Effects of drawdown in the reservoir, and pressure drop in the wellbore, are included; heat losses from the wellbore to the formation are not presently included in our analysis. The study concentrates on the influence of well diameter on p… more
Date: January 20, 1994
Creator: Hadgu, Teklu; Zimmerman, Robert W. & Bodvarsson, Gudmundur S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Feasibility report on alternative methods for cooling cavern oils at the U.S. Strategic Petroleum Reserve.

Description: Oil caverns at the U.S. Strategic Petroleum Reserve (SPR) are subjected to geothermal heating from the surrounding domal salt. This process raises the temperature of the crude oil from around 75 F upon delivery to SPR to as high as 130 F after decades of storage. While this temperature regime is adequate for long-term storage, it poses challenges for offsite delivery, with warm oil evolving gases that pose handling and safety problems. SPR installed high-capacity oil coolers in the mid-1990's t… more
Date: June 1, 2005
Creator: Levin, Bruce L.; Lord, David L. & Hadgu, Teklu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement and modeling of energetic-material mass transfer to soil-pore water - Project CP-1227 final technical report.

Description: Military test and training ranges operate with live-fire engagements to provide realism important to the maintenance of key tactical skills. Ordnance detonations during these operations typically produce minute residues of parent explosive chemical compounds. Occasional low-order detonations also disperse solid-phase energetic material onto the surface soil. These detonation remnants are implicated in chemical contamination impacts to groundwater on a limited set of ranges where environmental c… more
Date: May 1, 2006
Creator: Stein, Joshua S.; Sallaberry, Cedric M.; Webb, Stephen Walter; Phelan, James M. & Hadgu, Teklu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhanced Performance Assessment System (EPAS) for carbon sequestration.

Description: Carbon capture and sequestration (CCS) is an option to mitigate impacts of atmospheric carbon emission. Numerous factors are important in determining the overall effectiveness of long-term geologic storage of carbon, including leakage rates, volume of storage available, and system costs. Recent efforts have been made to apply an existing probabilistic performance assessment (PA) methodology developed for deep nuclear waste geologic repositories to evaluate the effectiveness of subsurface carbon… more
Date: September 1, 2010
Creator: Wang, Yifeng; Sun, Amy Cha-Tien; McNeish, Jerry A. (Sandia National Laboratories, Livermore, CA); Dewers, Thomas A.; Hadgu, Teklu & Jove-Colon, Carlos F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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