1,520 Matching Results

Search Results

Advanced search parameters have been applied.

Finite Volume Based Computer Program for Ground Source Heat Pump System

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 and the second is a three-dimensional computer program called GEO3D. Both of these simulation tools provide an extensive array of results to the user. A unique aspect of both these simulation tools is the complete temperature profile information calculated and presented. Complete temperature profiles throughout the ground, casing, tube wall, and fluid are provided as a function of time. The fluid temperatures from and to the heat pump, as a function of time, are also provided. In addition to temperature information, detailed heat rate information at several locations as a function of time is determined. Heat rates between the heat pump and the building indoor environment, between the working fluid and the heat pump, and between the working fluid and the ground are computed. The heat rates between the ground and the working fluid are calculated as a function time and position along the ground loop. The heating and cooling loads of the building being fitted with a GSHP are determined with the computer program developed by DOE called ENERGYPLUS. Lastly COP (coefficient of performance) results as a function of time are provided. Both the two-dimensional and three-dimensional computer programs developed as part of this work are based upon a detailed finite volume solution of the energy equation for the ground and ground loop. Real heat pump characteristics are entered into the program and used to ...
Date: February 22, 2013
Creator: Menart, James A.
Partner: UNT Libraries Government Documents Department

Imaging Fluid Flow in Geothermal Wells Using Distributed Thermal Perturbation Sensing

Description: The objective of Task 2 is to develop a numerical method for the efficient and accurate analysis of distributed thermal perturbation sensing (DTPS) data for (1) imaging flow profiles and (2) in situ determination of thermal conductivities and heat fluxes. Numerical forward and inverse modeling is employed to: (1) Examine heat and fluid flow processes near a geothermal well under heating and cooling conditions; (2) Demonstrate ability to interpret DTPS thermal profiles with acceptable estimation uncertainty using inverse modeling of synthetic temperature data; and (3) Develop template model and analysis procedure for the inversion of temperature data collected during a thermal perturbation test using fiber-optic distributed temperature sensors. This status report summarizes initial model developments and analyses.
Date: December 10, 2010
Creator: Freifeld, B. & Finsterle, S.
Partner: UNT Libraries Government Documents Department

Temperature-gradient and heat-flow data, Panther Canyon, Nevada

Description: A series of six shallow temperature-gradient holes were drilled for Sunoco Energy Development Company in Panther Canyon, Pershing County, Nevada during the period March 24 through June 15, 1981. A proposed intermediate-depth gradient hole was spud but abandoned after encountering unresolvable drilling problems. The locations of these holes are shown on figure 1. This report summarizes the results of the Panther Canyon project.
Date: July 1, 1981
Creator: Fisher, Marci A. & Gardner, Murray C.
Partner: UNT Libraries Government Documents Department

Parcperdue Geopressure -- Geothermal Project: Appendices (C--M)

Description: Twelve flow tests were made on the L. R. Sweezy No. 1 well. Short-term tests, Flow Test No.1 through Flow Test No.4 were designed to estimate formation properties and were conducted for drawdown periods measured in hours. Intermediate-term tests, Flow Test No.5 through Flow Test No.8, were for a few days and were designed to test for reservoir boundaries. Long-term tests, Flow Test No.9 through Flow Test No.12, were designed for drawdown periods of about 60 days in order to examine the depletion behavior of the reservoir.
Date: October 5, 1981
Creator: Sweezy, L.R.
Partner: UNT Libraries Government Documents Department

Italian Experience and Problems in Deep Geothermal Drilling

Description: Geothermal exploration at depth is being conducted in the Larderello area of Italy, in order to ascertain whether it is possible to extract geothermal fluids from the layers which underlie the reservoir now being exploited. The main operating problems are caused by the high thermality and the chemical corrosiveness of the fluids encountered; and by the practical problems involved in drilling without circulation to the surface in mainly hard but anhomogeneous fractured formations. The technology employed for deep geothermal well drilling plays an important role in this research. In deep geothermal well drilling it is essential that the equipment and the materials employed are suitable for use in areas which are characterized by high thermality and chemical corrosiveness. The results of the experiences gained in Italy concerning the materials and tools employed in deep geothermal exploration are presented. The various problems involved are described in detail and particular mention is made of drift control, fishing operations, cementation of the deep casing, control of the circulation fluid, and choice of the tubular materials.
Date: January 1, 1981
Creator: Cigni, U.; Del Gaudio, P. & Fabbri, F.
Partner: UNT Libraries Government Documents Department

Geothermal Well Completions in Cerro Prieto

Description: Geothermal well completion criteria have evolved from 1964 to this date. The evolution started with the common techniques used in oil-well completion and gradually changed to accommodate the parameters directly related to the mineralogic characteristics of the geothermal fluids. While acceptable completions can now be achieved, research techniques and data collection should be improved to optimize the procedures.
Date: January 1, 1981
Creator: Aguirre, B. D & Rivera, J. M. C.
Partner: UNT Libraries Government Documents Department

Geology and Thermal Regime of Bert Winn #1 geothermal Test, Franklin County, Idaho

Description: The conclusions of this report are: (1) Bert Winn No.1 did not encounter high-temperature zones of permeability, except possibly at 5,575 to 5,700 feet, where chloride conductivity indicates saline fluid entry, and where stabilized temperature may be 210-215 F. (2) Structurally, Bert Winn No.1 appears to have penetrated into the horst footwall block, penetrating progressively away from the horst-bounding faults believed to leak hot fluids. (3) Projections based on disequilibrium temperatures taken at 24 and 36 hours suggest a stabilized maximum temperature of about 260-265 F at 7,450. Maximum observed temperature was 243 F. (4) Geochemically, temperatures at depth should be over 300 F. On the basis of observed temperatures and gradients, 400 F might not be encountered until 12,000 feet at this site. (5) C.H. Stocks 1-A, about one mile northwest, appears to be hotter at comparable depths, and to be better located to penetrate the range-front fault set at drillable depth. (6) Bert Winn No.1 was sited principally on a geoelectrical anomaly in an area of high temperature gradients. With the remote exception of the saline interval at 5,575 to 5,700 feet, no evidence was seen in drilling and logging of any feature that could serve as the source of the geoelectrical anomaly.
Date: December 1, 1980
Creator: McIntyre, J.B. & Koenig, J.B.
Partner: UNT Libraries Government Documents Department

Ornithological Survey of the Proposed Geothermal Well Site No. 2

Description: The U.S. Fish and Wildlife Service (USFWS 1983) and the State of Hawaii (DLNR 1986) have listed as endangered six forest bird species for the Island of Hawaii. Two of these birds, the O'u (Psittirostra psittacea) and the Hawaiian hawk (Buteo solitarius) may be present within the Geothermal resource sub-zone (Scott et al. 1986). Thus, their presence could impact future development within the resource area. This report presents the results of a bird survey conducted August 11 and 12, 1990 in the sub-zone in and around the proposed well site and pad for True/Mid Pacific Geothermal Well No.2.
Date: August 16, 1990
Creator: Jeffrey, Jack
Partner: UNT Libraries Government Documents Department

Investigation and evaluation of geopressured-geothermal wells

Description: This group of wells-of-opportunity (WOO) consists of six candidates; one in Texas and five in Cameron Parish, Louisiana. Of the latter, two of three candidates in Twp 15S, Rge 5W are considered to be mutually exclusive in that each exhibits good potential for testing geopressured-geothermal aquifers which are indicated to be of sufficient volume for purposes of a 30-day test. A final selection of one location may be made from these three wells, assuming all pass screening criteria, based on estimated cost of the test and the negotiation of a satisfactory agreement with the owners of the surface and/or the minerals.
Date: February 1, 1978
Partner: UNT Libraries Government Documents Department

Investigation and Evaluation of Geopressured-Geothermal Wells; Detailed Reentry Prognosis for Geopressure-Geothermal Testing of Dr. M.O. Miller No. 1 Well

Description: This Gruy Federal Type I-A prospect was drilled as the Union Oil Company of California, Dr. M.O. Miller No. 1 and is located in Section 34, T15S, R5W, Cameron Parish, Louisiana. The land belongs to the heirs of Dr. Miller and is unleased. The well site is approximately 350 feet southwest of the northwest corner of Section 34 and approximately 4,000 feet south-southeast of Prospect L-3, Buttes Gas and Oil Co. et al., Gladys McCall No. 1. The former well site is accessible by approximately 2.8 miles of canal levee on which a board road would have to be constructed. In addition, there are two wooden bridges in fair condition to be crossed which will require minor repairs. The well was drilled to a total depth of 18,158 feet and plugged and abandoned as a dry hole mid 1965.
Date: April 21, 1978
Partner: UNT Libraries Government Documents Department

An inventory survey at the site of the proposed Kilauea Middle East Rift Zone (KMERZ), Well Site No. 2

Description: At the request of True Mid Pacific Geothermal, Archaeological Consultants of Hawaii, Inc. has conducted an inventory survey at the site of the proposed Kilauea Middle East Rift Zone (KMERZ), Well Site No.2, TMK: 1-2-10:3. The Principal Investigator was Joseph Kennedy M.A., assisted by Jacob Kaio, Field Supervisor and field crew Mark Borrello B.A., Michael O'Shaughnessy B.A., and Randy Adric. This report supercedes all previous reports submitted to the Historic Presentation Section of the Department of Land and Natural Resources. In addition to 100% surface coverage of the 400 x 400 foot well pad itself, 100% surface coverage of a substantial buffer zone was also completed. This buffer zone was established by the Department of Land and Natural Resources, Historic Preservation personnel and extends 1000 feet east and west of the well site and 500 feet north and south of the well site.
Date: March 1, 1991
Creator: Kennedy, Joseph
Partner: UNT Libraries Government Documents Department

Special Conditions for HGP-A Wellhead Generator Proof-of-Feasibility Project, Specification S-00-001

Description: This specification applies to the general requirements of all purchased materials and equipment and provides general instructions for Suppliers. Purchaser as referred to here under is the Research Corp. of University of Hawaii. Rogers Engineering Co., Inc. is the authorized representative of the Research Corp. of University of Hawaii with respect to purchases made under this specification.
Date: October 25, 1978
Partner: UNT Libraries Government Documents Department