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Systems Analysis The State Geothermal Data website, funded by the Energy Department, offers an interactive data contribution map to compare contributions from all 50 states. The clickable map enables users to see datasets by state. States Geoscience Information Network (USGIN) hub of the network. As more data nodes on the system independently curate the data, the system will gain long-term sustainability. Oregon Data is On the Map Oregon—the first state to use digitized data from the NGDS to map resources— now has a great tool for identifying the hot geothermal energy resource deep beneath the earth’s surface. A state resource assessment map plots information on location, temperature, and other features statewide with this easy-to-use mapping tool. In addition to sharing existing data, Oregon is collecting new data through aerial infrared surveys to look for small variations in surface temperature that will identify potential geothermal resources. The state is also drilling three test wells—two in Lake County and one in Malheur County, to measure bottomhole temperatures and thermal conductivity: two indicators that validate whether geothermal heat flow is sufficient to drill for energy production. The interactive map is another example of the kinds of open-source data that can be accessed through the NGDS. NGDS — State Contributions NGDS Aiding GSHP in Indiana NGDS Thermal Conductivity Data is Saving Colorado Scientists Time and Money Though he knew almost nothing about heat-pump technology before investigating items for NGDS data collection, Paul Morgan has since made a significant contribution to ground source heat pump design in his home state. Working with engineers in early- stage planning of geothermal ground source heat pumps for the Colorado State Capitol, Morgan noted that Denver was built over a basin that uses mostly surface water. So Morgan suggested the heat-pump system use water pumped from one of the aquifers for heat exchange—two boreholes, one producing well and one injection well, with a flow of 400 gpm. The original plan called for 300 drill-holes. As a consequence, the parking lot and park in front of the State Capitol were saved from several months of drilling. GEOThERmAl TEChNOlOGIES OffICE “Compiling data for the NGDS project resulted in my recommendation to pump from the aquifer,” says Morgan. Thermal conductivity—one of the measurements in his data collection—was taken from drill-cutting samples for heat- pump drillholes, which ultimately led to Morgan’s recommendation to the state. As a result of the NGDS project, Morgan has been able to make positive contributions to a number of heat pump projects. Illinois Geologists Curating Data This year at the University of Illinois, state geologists and geosciences faculty are publishing year-3 data sets themselves— with support from the NGDS design team. Some of the data were validated ahead of schedule using a new validation tool developed by the Arizona Geological Survey (AZGS)—including active faults for all of Nevada. AZGS experts published detailed instructions for deploying and validating services submitted for the NGDS along with links on the United Map of Indiana showing the locations of Geothermal Monitoring Network sites and the diversity of surficial geologic deposits. Lee Allison, State Geologist and Director of the Arizona Geological Survey, and Kim Patten, Associate Director for Planning and Development, network during GTO’s annual Peer Review in April. Ram Power (right), is one of the recent submitters into the NGDS GDR (photo courtesy Ram Power). Leveraging GTO’s investment in the GDR, the Energy Department’s Buildings Technologies Office is using the NGDS to house heat pump data. The costs of exploiting shallow geothermal energy via ground source heat pumps (GSHP) can be minimized by allowing installers to design technologies that factor the appropriate thermal properties and predominant moisture regime of the geologic material being utilized. Researchers at the Center for Geospatial Data Analysis and the Indiana Geological Survey, for instance, developed a comprehensive monitoring network for in-situ measurements of shallow subsurface thermal conductivity, temperature gradients, and soil moisture. Continuous measurements of thermal gradients in the upper six feet of the ground are collected at six separate monitoring sites near Indianapolis and Fort Wayne, the two largest population centers in Indiana. Although software allows GSHP installers to optimize these configurations, input parameters must first be determined, including soil thermal properties and earth temperatures. Thermal data from the NGDS will support the design of more efficient systems by allowing GSHP installers to efficiently tailor their configurations to specific geological conditions and account for seasonal changes. Through GTO state contributions to the NGDS, the Indiana Geological Survey established a shallow geothermal monitor- ing network on why geology is important to GSHP installers. The Indiana State Survey established thermal conductivity monitoring sites to determine variability in theglacialsoils.Textureofsedimentandsoil wetness are vital measures of the ground’s receptivity to ground source heat pumps, as the moisture is a driver for thermal con- ductivity in the near surface. Ultimately this data will help determine whether specific sites are conducive to GSHP. GTO R&D focuses on geothermal energy production while geothermal heating and cooling for buildings is managed at the Energy Department by DOE’s Buildings Technologies Office. 20 21 2013 ANNuAl REpORTPDF Image | Geothermal Technologies Office Annual Report
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