Geothermal Systems

Massachusetts Direct-Use Geothermal Systems

Basic Information
Author: 
Koteas, Christopher
Description: 
This spreadsheet is a compilation of Direct Use Geothermal pump system observations (basic description of sites utilizing geothermal energy for space heating, greenhouses and resorts and other direct use applications) compiled by the Massachusetts Geological Survey, published as a Web feature service for the National Geothermal Data System. The document contains 6 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 a worksheet with vocabularies for use in populating the spreadsheet (data valid terms). Data from 104 sites utilizing this technology are included. Fields in the data table include FeatureURI, Name, UTM_E, UTM_N, UTMDatumZone, LatDegree, LongDegree, SRS, LocationUncertaintyStatement, LocationUncertaintyCode, LocationUncertaintyRadius, LocationKeyword, HeatApplication, Temperature, TempUnits, TempMeasurementProcedure, TempMeasurementDate, UserType, Flow, FlowUnits, FlowMeasurementProcedure, Capacity, CapacityUnits, CapacityProcedure, EnergyUse, EnergyUseUnits, EnergyUseProcedure, LoadFactor, FacilityContact, PostalAddress, Zip, Phone, EMailAddress, Source, MetadataURI and DataEntrySource.
Publication Date: 
Tuesday, July 19, 2011
Resource Language: 
English
Intelectual Originator Contact
Organization Name: 
Massachusetts Geological Survey
Person Name: 
Koteas, Christopher
Street Address: 
611 N. Pleasant Street
City: 
Amherst
State/Province: 
Massachusetts
Postal Code: 
01003
Country: 
United States of America
Phone: 
413-545-2286
Resource Distribution Contact
Organization Name: 
Massachusetts Geological Survey
Person Name: 
Koteas, Christopher
Street Address: 
611 N. Pleasant Street
City: 
Amherst
State/Province: 
Massachusetts
Postal Code: 
01003
Country: 
United States of America
Phone: 
413-545-2286
Geographic Extent
North bounding latitude: 
42.9266
South bounding latitude: 
41.1066
West bounding longitude: 
-73.5645
East bounding longitude: 
-69.3457

Optimization of Power Generation from Moderate Temperature Geothermal Systems – A Case History

Basic Information
Author: 
Sanyal, S.K.
Author: 
Kitz, K.
Author: 
Glaspey, D.
Description: 
Advances in binary-cycle power and submersible pump technologies over the past two decades have made electric power generation from geothermal fields in the moderate temperature range (100° to 180°C) convincingly commercial. For geothermal water in this temperature range, binary-cycle is more efficient for power conversion than flash-cycle and pumping of wells is more efficient than self flowing. The lower temperature limit of 100°C is imposed by the limits of binary-cycle technology and the upper limit of 180°C is imposed by the limits of pump technology commercially available today. This paper is a case study of optimization of net power generation from such a field at Raft River, in the State of Idaho, United States.
Publication Date: 
Saturday, January 1, 2005
Resource Language: 
English
Intelectual Originator Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Resource Information
Access Statement: 
Abstract available online at http://www.geothermex.com/files/Sanyal_2005-4.pdf For a copy of this paper please e-mail us at mw@geothermex.com
Resource Distribution Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Geographic Extent
North bounding latitude: 
38.2925
South bounding latitude: 
37.4425
West bounding longitude: 
-122.805
East bounding longitude: 
-120.905
Previous Citation
Bibliographic Citation: 
Sanyal, S.K., Kitz, K., and Glaspey, D., 2005. Optimization of Power Generation from Moderate Temperature Geothermal Systems – A Case History . GeothermEx, Inc., Richmond, California.

Classification of Geothermal Systems - A Possible Scheme

Basic Information
Author: 
Sanyal, S.K.
Description: 
At the request of the United States Department of Energy, the author was asked by the Geothermal Energy Association (Washington, D.C.) to prepare a white paper on the subject (in connection with a new national assessment of geothermal resources). This paper offers a possible scheme in which geothermal resources are classified into seven categories based on temperature: non-electrical grade (<100°C), verylow temperature (100°C to <150°C), low temperature (150°C to 190°C), moderate temperature (190°C to <230°C), high temperature (230°C to <300°C), ultrahigh temperature (>300°C), and steam fields (approximately 240°C with steam as the only mobile phase). In the first four classes, liquid water is the mobile phase in the reservoir; in the “high” and “ultra-high” temperature reservoirs, the mobile fluid phase is either liquid or a liquid-vapor mixture.
Publication Date: 
Sunday, January 2, 2005
Resource Language: 
English
Intelectual Originator Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Resource Information
Access Statement: 
Abstract available online at http://www.geothermex.com/files/Sanyal_2005-6.pdf For a copy of this paper please e-mail us at mw@geothermex.com
Resource Distribution Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Geographic Extent
North bounding latitude: 
41.9864
South bounding latitude: 
31.6
West bounding longitude: 
-124.629
East bounding longitude: 
-113.906
Previous Citation
Bibliographic Citation: 
Subir K. Sanya, 2005. Classification of Geothermal Systems - A Possible Scheme. GeothermEx, Inc., Richmond, California.

An Analysis of Power Generation Prospects from Enhanced Geothermal Systems

Basic Information
Author: 
Sanyal, S.K.
Author: 
Butler, S.J.
Description: 
This paper presents an analysis of power generation prospects from Enhanced Geothermal Systems (EGS), specifically, reservoirs with subcommercial permeability enhanced by hydraulic stimulation. EGS is also known as “hot dry rock” or “hot fractured rock” systems. The performance under consideration here is the net electrical power delivered as a function of time over the 20-to-30 year life of a power plant. Although the parameters in this exercise generally reflect conditions encountered at the Desert Peak EGS project in the State of Nevada, United States, the conclusions are applicable, at least qualitatively, to any EGS project.
Publication Date: 
Saturday, January 1, 2005
Resource Language: 
English
Intelectual Originator Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Resource Information
Access Statement: 
Abstract available online at http://www.geothermex.com/files/Sanyal_2005-2.pdf For a copy of this paper please e-mail us at mw@geothermex.com
Resource Distribution Contact
Organization Name: 
GeothermEx, Inc.
Street Address: 
3260 Blume Drive,Suite 220
City: 
Richmond
State/Province: 
CA
Postal Code: 
94806
Country: 
United States
Phone: 
510-527-9876
Fax: 
510-527-8164
Geographic Extent
North bounding latitude: 
41.7245
South bounding latitude: 
34.1099
West bounding longitude: 
-124.805
East bounding longitude: 
-115.84
Previous Citation
Bibliographic Citation: 
Subir K. Sanyal and Steven J. Butle, 2005. An Analysis of Power Generation Prospects from Enhanced Geothermal Systems. GeothermEx, Inc., Richmond, California.
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