Geoscience Basics of Geothermal Energy
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description
Geoscience Basics of Geothermal Energy. Rick Allis, Joe Moore & Stuart Simmons rickallis@ utah.gov , jmoore@ egi.utah.edu, [email protected]. 8:00-8:15 IntroductionStuart Simmons 8:15 -10:00 Geology/MineralogyJoe Moore 10:00- 10 :30 Coffee - PowerPoint PPT Presentation
Transcript of Geoscience Basics of Geothermal Energy
8:00-8:15 IntroductionStuart Simmons8:15-10:00 Geology/Mineralogy Joe Moore10:00-10:30 Coffee 10:30-11:45 Fluid Chemistry Stuart Simmons11:45-12:30 ReservoirsRick Allis
Rick Allis, Joe Moore & Stuart [email protected], [email protected], [email protected]
Geoscience Basics of Geothermal Energy
Physical: Heat & mass transfer
Temperature-pressure gradients
Permeability-porosity
Hydrology & fluid flow
Chemical: Fluid compositions
Fluid-mineral equilibria
Mineral corrosion/deposition
Hydrothermal alteration
GEO
LOG
Y
Geoscience of Geothermal Energy
Geothermal Resources
Geothermal Resources
Wairakei 2010~235 MW capacity1729 GWh of net generation54.6 million tonnes geothermal fluid60.8 petajoules thermal>90% load factor>50 years of production
Power Cycles & Electricity Generation
liquid-dominatedreservoir
vapor-dominatedreservoir
liquid-dominatedreservoir
condensing turbines binary plant
Gra
phic
s: D
uffie
ld &
Sas
s, 2
003
>200° C ~240° C <200° C
Geothermal Power
MWth= m × (Hreservoir-H75°C)
Wairakei P
roduction
extensional fault
volcano-intrusion
rese
rvoi
rs <
3 k
m d
epth
Geothermal Systems: Stored vs Flowing
liquid-dominated (100-300°C) vapor-dominated (220-250°C)
enthalpy kJ/kg1000 2000 3000
sedimentary basin
reservoir
reservoir
reservoir
reservoir
