The geothermal handbook

Discussion of geothermal technology and an assessment of impacts from development - for general public

Brief for Governor's Advisory Board on the Underwater Cable Transmission Project

Contains maps of Puna

KS-4 well completion report

"Pursuant to Subchapter 12 (Drilling: Records and Reports of Wells), Section 13-183-85. Puna Geothermal Venture (PGV) hereby submits the attached well completion report for Well Kapoho State 4 (KS-4). Included in this report are well record summary, well summary, well history, mud log, direction survey, chemical analysis of groundwater, gamma logs, wellhead schematic, mechanical integrity tests, well plot, and well map.

Geothermal Information Dissemination and Outreach

Project Purpose To enhance technological and topical information transfer in support of industry and government efforts to increase geothermal energy use in the United States (power production, direct use, and geothermal groundsource heat pumps). Project Work GRC 2003 Annual Meeting. The GRC convened the meeting on Oct. 12-15, 2003, at Morelia's Centro de Convenciones y ExpoCentro in Mexico under the theme, International Collaboration for Geothermal Energy in the Americas. The event was also sponsored by the Comision Federal de Electricidad. ~600 participants from more than 20 countries attended the event. The GRC convened a Development of Geothermal Projects Workshop and Geothermal Exploration Techniques Workshop. GRC Field Trips included Los Azufres and Paricutin Volcano on Oct. 11. The Geothermal Energy Association (Washington, DC) staged its Geothermal Energy Trade Show. The Annual Meeting Opening Session was convened on Oct. 13, and included the governor of Michoacan, the Mexico Assistant Secretary of Energy, CFE Geothermal Division Director, DOE Geothermal Program Manager, and private sector representatives. The 2003 Annual Meeting attracted 160 papers for oral and poster presentations. GRC 2004. Under the theme, Geothermal - The Reliable Renewable, the GRC 2004 Annual Meeting convened on Aug. 29-Sept. 1, 2004, at the Hyatt Grand Champions Resort at Indian Wells, CA. Estimated total attendance (including Trade Show personnel, guests and accompanying persons) was ~700. The event included a workshop, Geothermal Production Well Pump Installation, Operation and Maintenance. Field trips went to Coso/Mammoth and Imperial Valley/Salton Sea geothermal fields. The event Opening Session featured speakers from the U.S. Department of Energy, U.S. Department of the Interior, and the private sector. The Geothermal Energy Association staged its Geothermal Energy Trade Show. The Geothermal Education Office staged its Geothermal Energy Workshop. Several local radio and TV station interviews were conducted during the event. Technical Program included 136 technical papers. All were published in Volume 28 of the GRC Transactions. Volume 28, GRC Transactions Pblished as a high-quality, durable casebound volume, Volume 28 of the Transactions published 119 out of 136 technical papers (692 pp) presented at the GRC 2004 Annual Meeting. The papers were submitted by geothermal experts and professionals from around the world. The papers were reviewed over a 2-day period by 25 volunteer (in-kind) geothermal experts from the private sector and DOE National Laboratories. GRC staff received and cataloged the papers, and maintained interaction with authors for revisions and corrections. DOE Geothermal Technologies Newsletter The Office of Geothermal Technologies quarterly newsletter, Geothermal Technologies, is produced at the National Renewable Energy Laboratory (NREL). This 2-color, 4- to 16-page newsletter summarizes federal geothermal research and development projects and other DOE geothermal news. The GRC receives newsletter disk copy and color-key proof from NREL for each newsletter, then follows through with print production and distribution. Circulation is 1,000 per issue (plus 300 copies of the newsletter shipped to NREL for internal and public distribution). During the project period, the GRC printed, stitched and bound the Geothermal Technologies newsletter into the Sept/Oct 2003, Jan/Feb 2004, and May/June 2004 editions of the GRC Bulletin. Multiple copies (300) of the newsletter sans magazine were provided to NREL for internal DOE distribution. GRC Geothermal Research Library The GRC has built the largest and most comprehensive library in the world devoted to geothermal energy. The GRC Geothermal Library provides rapid accessibility to the majority of technical literature crafted over the past 30 years, and preserves hard copy and on-line databases for future use by geothermal researchers and developers. A bibliography for over half of the physical library's citations is available through keyword search on the GRC web site (www.geothermal.org). The GRC maintains one employee to catalog donated libraries, thus increasing the number of available citations. Document collection is ongoing, with regular database additions. Continuing development of the GRC On-Line Library includes: 1) data entry and development of keywords for additional citations; 2) filing library publications; 3) maintaining and enhancing the website; 4) purchase of publications and geothermal articles; and 5) maintenance of computer and other equipment. Page hits were 243,000 per month in November 2003

Analysis of Pressure Transient Response for an Injector under Hydraulic Stimulation at the Salak Geothermal Field, Indonesia

ABSTRACT Four pressure fall-off pressure transient tests were conducted in a well being stimulated by high pressure injection. The tests were analyzed with a technique based on fractional flow in a composite reservoir. The results show the progress of the stimulation process as the measured reservoir properties change from test to test. Novel techniques for analysis of pressure transient tests are demonstrated. The reason for the very large wellbore storage effect usually found in injection fall-off tests is discussed and considered in the analysis

Ground-source heat pumps using phase change materials

Employing Phase Change Materials (PCMs) is normally considered as an effective measure to store thermal energy, by means of their latent heat during phase changing. But, it could also represent a method to smooth the thermal wave generated from operations of thermal machines, such as ground-source heat pumps (GSHPs). This paper evaluates the application of PCMs through numerical modelling to solve the heat transfer in ground carried out by a horizontal and shallow ground heat exchangers (GHXs), when coupled to a GSHPs. The PCMs are assumed to be mixed directly with backfill material close to the GHXs or placed in a surrounding shell that is in direct contact with the heat exchangers. Results showed that the use of the PCMs incorporated with GHXs meets the instantaneous heating demand by the GSHPs, and reduces the sudden cooling wave on the ground interface. By calibrating the amount and the properties of the PCM in accordance with the energy requirements of the GSHP, it is possible to balance the heat extraction of the operating time to the heat recovered during the off time of the GSHP. As a consequence, the peak temperature results could be smoothed by up to 0.7 K in comparison to the case without PCMs. Thus, higher coefficients of performance (COP) are expected for GSHPs. Moreover, the underground thermal energy storage is recovered for shallow GHXs, getting over the seasonal variations due to weather change.peer-reviewe

Annual report of the hydrology study of the geothermal project

Contents: Published literature review and data compilation -- Tidal analysis of continuous monitoring data -- Numerical simulation of the aquifer -- Project need

Puna Geothermal Venture well KS-1

Puna Geothermal Venture quarterly well reports 1A and Kapoho State 2. Includes diagrams and related correspondence