Tuesday, December 29, 2015 3:36 pm

This paper examines electrical planning required for successful geothermal electrical power generation projects. The importance of examining the impact of a proposed new generator connection on the operational performance of the existing electrical power system is outlined. Also discussed are electrical engineering design problems that can be encountered and solutions that have been used to enable operation in a geothermal environment.

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Tuesday, December 29, 2015 3:36 pm

Today, geothermal energy is known as one of the most reliable alternative renewable energy source and has been proved to be technically and economically feasible. Geothermal electricity is generated from geothermal energy. Several modes of technology are used to convert the geothermal energy into electricity but the paper will focus on wellhead generation technology. Kenya has been focusing on the generation of power to meet its acute power shortage and ever rising demand. Traditionally KenGen has used conventional power plants which involve months of well drilling and years of central power plant construction. The wellhead technology seeks to take advantage the idle time between completion of drilling and the start and finish of the central power plant construction. It yields an overlapping concept that harvests the capped steam as soon as it is available for immediate power and revenue generation prior to the central power plant completion. KenGen being the countryis leading power producer has embraced the use of wellhead generators in geothermal thus realizing early power generation. Wellhead Technology has a modular approach which connects wells with outputs of up to 15MW. The modular approach allows for a combination of wells using short streamlines instead of the traditional long lines which are very costly and take much longer to construct. The modules form clusters which generate power through the convectional mode of steam running turbines. The power is then directly fed into the grid. As a result, wellhead technology has enabled KenGen gain an edge over the following challenges: Immediate power supply to address its rising demand. Due to its low capital cost and immediate utilization the company has been able to borrow capital and repay almost immediately unlike the traditional mode that takes close to a year before the repayment plan kicks off. This minimizes interest gains on loan. Reduced cost of power generation i.e. steam fields. Power plant portability which taps into isolated and remote areas. Higher revenue collection from the attractive wellhead feed-in tariff as compared to the conventional PPAs. Modular approach enhances access to small value loans thus appealing to small and medium scale investors. This paper seeks to address the wellhead (early generation) concept and KenGen experience in deploying this revolutionary technology.

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Tuesday, December 29, 2015 3:36 pm

The objective of this report is to demonstrate an extensive geochemical database on waters, gases, scales, rocks, and hot-spring deposits from the Dixie Valley region. These data provide useful information for ongoing and future investigations on geothermal energy, volcanism, ore deposits, environmental issures, and groundwater quality in this region

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Tuesday, December 29, 2015 3:36 pm

An environmental overview of geopressured-geothermal development of the Texas Gulf Coast

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Tuesday, December 29, 2015 3:36 pm

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Tuesday, December 29, 2015 3:36 pm

Due mainly to its favorable geodynamic setting along the active convergent plate margin of Southamerica, characterized by a broad continental volcanic arc with numerous active volcanoes and intense seismicity, and to the elevated oil prices of the time, Ecuador started the exploration of its geothermal resources about 30 years ago, aiming on high enthalpy prospects, suitable for electricity production.Exploration for geothermal resources was carried out from the mid 1970s through the early 1990s by ecuadorean government institutions (former INECEL and INE) with the aid of foreign technical assistance programs (mainly OLADE, IAEA, UNDP). Reconnaissance studies focused on areas with recent volcanic and tectonic activity in the Plio-Quaternary volcanic arc, which covers most of the northern andean highlands of Ecuador. Results from geo-scientific surveys revealed the presence of several active hydrothermal systems. Tufioo-Chiles, Chachimbiro and Chalupas appeared as the most promissing prospects, with deep temperatures in excess of 200 ?C and a combined potential of about 500 Mwe. This potential was inferred from surface data only, since no geothermal exploratory wells have been drilled yet in Ecuador. A dozen other geothermal prospects, related to silicic calderas and /or evolved stratovolcanoes can substantially increase the inferred potential, but quantitative data are scarce or even nonexistent. Other areas of interest, including the Galapagos hot spot islands, still remain unexplored.Low to medium temperature resources are abundant along the volcanic arc and are mainly related to recent NNE strike slip faulting and local pull appart structures; these geothermal resources are not confined to the volcanic highlands, but are also present in the fore-arc plains as well as in back-arc areas, mostly related to deep cutting basement faults. As for now, geothermal utilization in Ecuador is currently restricted to direct use in swimming pools, only. Basic research, applicable to geothermal is done, scarcely, at few universities.Geothermal is considered a renewable non-conventional type of energy, together with solar, wind, biomass and others. CONELEC and MEM (Ministry of Energy and Mines) are the leading national agencies for energy issues and promote the use of renewable resoures by assigning them a especial status regarding priority for development and connection to the national grid, as well as a favorable price for selling electricity.The energy market is dominated by Hydro (50.6 %) and Fossil Fuel (49.4 %) generation, with a total installed capacity of 3451 Mwe, yielding a gross electricity production of 12357 GWh/yr (as of Dec 2002). Production from renewable energy sources in Ecuador, including geothermal, solar and wind, is still neglegible, but is planned to increase in the future. The Tufioo-Chiles geothermal prospect owns the especial status of Bi-National Project, due to its location on the Ecuador-Colombia border. This and several other high and low-medium temperature geothermal prospects in Ecuador await state and private investment to be developed in order to lessen the dependence on fossil fuel use. Finally, in Ecuador, geothermal energy is challenged to be cost-efficient in front of an abundant hydro resource, as well as to be environmentally safe.

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Tuesday, December 15, 2015 12:53 pm

This resource is a compilation of Massachusetts Heat Flow data provided by the Massachusetts Geological Survey. The data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains four worksheets, including information about the template with notes related to revisions of the template, resource provider information, the data, and a field list (data mapping view). This resource was provided by the Massachusetts Geological Survey and made available for distribution through the National Geothermal Data System

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Tuesday, December 15, 2015 12:47 pm

This resource is a data compilation of borehole temperature observation data provided by the Kansas Geological Survey. The data are available in the following formats: web feature service, web map service, ESRI Service Endpoint, and an Excel workbook for download. The workbook contains four worksheets, including information about the template with notes related to revisions of the template, resource provider information, the data, and a field list (to assist data mapping). This resource was provided by the Kansas Geological Survey and made available for distribution through the National Geothermal Data System. The download Excel workbook file size is 50 MB zipped and may take several minutes to download.

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Tuesday, December 15, 2015 12:42 pm

This resource is a compilation of heat flow measurements and calculations, provided by the Ohio Department of Natural Resources. These data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains 5 worksheets, including information about the template, notes related to revisions of the template, resource provider information, the data, a field list (data mapping view) and vocabularies (data valid terms) used to populate the data worksheet. This resource was provided by the Ohio Department of Natural Resources and made available for distribution through the National Geothermal Data System.

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Tuesday, December 15, 2015 12:41 pm

This resource is a compilation of Ohio Thermal Conductivity observation data provided by the Ohio Department of Natural Resources Division of Geological Survey. These data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains contains 5 worksheets, including information about the template, notes related to revisions of the template, resource provider information, the data, and a field list (data mapping view). This data was provided by the Ohio Department of Natural Resources Division of Geological Survey and made available for distribution through the National Geothermal Data System.

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Tuesday, December 15, 2015 12:39 pm

This resource is an online Statewide map service for Kansas showing surficial geology. The map data is available as web map service, web feature service, and an ESRI Service Endpoint. The Statewide base map was compiled at a scale of 1:100,000. Where available, surficial geology mapped at 1:24,000 for individual counties are included. The data was compiled by the Kansas Geological Survey and made available for distribution through the AASG Geothermal Data System.

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Tuesday, December 15, 2015 12:38 pm

This resource is a compilation of thermal conductivity data for rock samples in Massachusetts provided by the Massachusetts Geological Survey. The data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains five worksheets, including information about the template, notes related to revisions of the template, resource provider information, and the data, a field list (data mapping view). This resource was provided by the Massachusetts Geological Survey and made available for distribution through the National Geothermal Data System.

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Tuesday, December 15, 2015 12:32 pm

This resource contains Heat Flow observation data for Maine provided by the Maine Geological Survey. The data are published in the Heat Flow schema version 1.3 as a Web feature service, a Web map service, an ESRI service endpoint, and as an Excel workbook for download. The Excel workbook contains six worksheets including information about the template, notes related to revisions of the template, resource provider information, the data, and a field list (data mapping view). The Excel workbook contains header features for Thermal Conductivity, Gradient, Heat Flow, and Heat Flow Correction Method for each observation. This resource was provided by the Maine Geological Survey and made available for distribution through the National Geothermal Data System.

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Tuesday, December 15, 2015 12:15 pm

This resource is a compilation of Kansas drill stem data from hydrocarbon wells provided by the Kansas Geological Survey. Data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains four worksheets, the data, resource provider information, a field list (to assist data mapping), and notes related to revisions of the template. This data was provided by the Kansas Geological Survey and made available for distribution through the AASG National Geothermal Data System.

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