| AvgReservoirDepth
|
1,306.5 m (1.307 km, 0.812 mi, 4,286.417 ft, 1,428.801 yd) +
|
| BrophyModel
|
Type E: Extensional Tectonic, Fault-Controlled Resource +
|
| Coordinates
|
38.4867158822°, -112.852795604°Latitude: 38.4867158822
Longitude: -112.852795604 +
|
| EstReservoirVol
|
8,500,000,000 m³ (8.5 km³, 2.039 mi³, 300,174,667,128.5 ft³, 11,117,580,261.5 yd³, 8,500,000,000,000 L, 53,463,391,545 bbl(oil), 71,284,522,068.5 bbl(US), 2,245,462,445,043 gal(US)) +
|
| FuturePlans
|
Blundell Unit 3 is a proposed 33 MW (net) … Blundell Unit 3 is a proposed 33 MW (net) double-flash plant. The double-flash technology was selected due to its lower capital cost per installed megawatt and higher efficiency (about 20% more power output over single-flash units). The unit will require drilling four production wells to 5,000 feet and four injection wells to 6,500 feet. The goal is to produce a geothermal resource between 500 and 650°F. Five steam separators (four high-pressure and one low-pressure) will also be required. Sixteen miles of transmission line upgrades will also be required. The plant is still in the design phase with no fixed time set to start construction.h no fixed time set to start construction.
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| GEADevelopmentPhase
|
Operational +
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| GeothermalRegion
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Northern Basin and Range Geothermal Region +
|
| HeatSource
|
Known or inferred magmatic system +
|
| History
|
The hot springs were first described in th … The hot springs were first described in the 1880s by early settlers. By the 1900s a resort was established where settlers, miners and cattlemen used the hot springs for bathing, laundry and swimming. The resort later was abandoned and only some of the foundation walls are visible today. By 1966, the main spring was reported to have stopped flowing. In 1972, the University of Utah initiated scientific studies of the geothermal resource. By 1974, Phillips Petroleum Company obtained 18,871 acres through a competitive lease. Through exploratory drilling in 1975, the 500oF liquid-dominated reservoir was discovered, and in April 1976, the Roosevelt Hot Springs Unit (RHSU) was formed and was the first geothermal unit approved by the U.S. Department of Interior. The RHSU is eight miles long and six miles wide. Based on the extensive resource and reservoir evaluation that then took place, Phillips Petroleum and Utah Power & Light (now PacifiCorp) signed an agreement in 1980 to develop the resource for electrical production. Phillips Petroleum developed and produced the geothermal resource while Utah Power and Light agreed to provide the generating plant and steam transportation facilities.
Utah Power & Light first generated commercial electricity in 1981 using a 1.6 megawatt biphase turbine research unit installed on one of the wells. This unit used both the kinetic and thermal energy of the brine which was reported to produce 25% more power output as compared to a single-flash unit. The unit was designed by Biphase Energy Systems of Santa Monica, CA with additional funding and effort for Electric Power Research Institute and Utah Power & Light. The unit generated power that was delivered to the gird for approximately 4,000 hours beginning in October 1981. Options were weighed regarding use of conventional flash technology vs. biphase technology, and for various reasons conventional flash unit was chosen.
In 1982, construction began on Blundell Unit 1, a 26 MW (23 MW, net) single-flash geothermal power plant, which came on-line in 1984. In 1991, PacifiCorp began a 30-year steam purchase contract with Utah Power. Since that time, the plant’s average annual power generation has been about 167,000 MWh. PacifiCorp merged with Scottish Power in 1999 and was later purchased by Mid-America Energy in 2005. A new turbine rotor was installed in 2001 to increase plant efficiency. By 2007, Blundell Unit 2 had come on line. This is an Ormat Technologies, Inc., 11 MW air-cooled iso-pentane binary unit (gross – 10 MW net) that acts as a bottoming cycle to the flash steam unit.
The four production wells produce 2.25 million pounds per hour of geothermal brine with a wellhead temperature of 450°F. Four well head separators flash 400,000 pounds per hour steam that is delivered by pipeline to the turbine. The 350°F reject temperature is then delivered to an Ormat Technologies, Inc., binary unit, which returns the brine after use to the injection wells at 190°F.after use to the injection wells at 190°F.
|
| MeanCapacity
|
119.53 MW (119,530 kW, 119,530,000 W, 119,530,000,000 mW, 0.12 GW, 1.1953e-4 TW, 1.1953e-7 PW, 1.1953e-10 EW, 1.1953e-13 ZW) +
|
| MeanReservoirTemp
|
523.15 K (250 °C, 482 °F, 941.67 °R) +
|
| Name
|
Roosevelt Hot Springs Geothermal Area +
|
| NetProdCapacity
|
206,098 MW (206,098,000 kW, 206,098,000,000 W, 206,098,000,000,000 mW, 206.098 GW, 0.206 TW, 2.06098e-4 PW, 2.06098e-7 EW, 2.06098e-10 ZW) +
|
| NumOfPlants
|
2 +
|
| OpenEI/PageDescription
|
Roosevelt Hot Springs Geothermal Area: geothermal resource area.
|
| OpenEI/PageKeyword
|
Geothermal +
, Milford +
, Utah +
, Northern Basin and Range Geothermal Region +
, Operational +
|
| Owners
|
PacificCorp Energy, PacificCorp +
|
| PartOf
|
Northern Basin and Range Geothermal Region +
|
| Place
|
Milford, Utah +
|
| SalinityAverage
|
6529 +
|
| SanyalTempReservoir
|
High Temperature +
|
| SanyalTempWellhead
|
High Temperature +
|
| TechProbSolutions
|
The 1.6 MW biphase turbine-generator set w … The 1.6 MW biphase turbine-generator set was only run for less than a year starting in 1981. As a result of this test, a flash-steam plant was favored over the biphase unit for the permanent installation. The main reason for not selecting the biphase unit, even though it could produce 25% more power as compared to the flash steam type, was reportedly due to the complicated mechanical operation of the plant and the related high maintenance that it required.
Some silica scaling from the approximately 230 ppm was originally experienced from the brine, thus acid injection was started to control the scaling.ection was started to control the scaling.
|
| TectonicSetting
|
Extensional Tectonics +
|
| TopoFeatures
|
Horst and Graben +
|
| Has queryThis property is a special property in this wiki.
|
Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
, Roosevelt Hot Springs Geothermal Area +
|
| Has improper value forThis property is a special property in this wiki.
|
Purchasers +
, Overview +
, RegEnvIssues +
, OtherUses +
, AreaGeology +
, ReservoirTemp +
, ReservoirTopDepth +
, ControlStructure +
, RelictGeoFeatures +
, VolcanicAge +
, HostRockAge +
, HostRockLithology +
, SalinityLow +
, SalinityHigh +
|
| Categories |
Geothermal Resource Areas +
, Templates +
, Formatting Templates +
|
| Modification dateThis property is a special property in this wiki.
|
9 May 2013 20:40:08 +
|
