electricity from geothermal. developing the geothermal resource for power generation geothermal...
TRANSCRIPT
BLUNDELL GEOTHERMAL PLANT
PRESENTED BY RENE ANDREWS
Electricity from Geothermal
Developing the Geothermal Resource for Power Generation
Geothermal Well Characteristics Vapor Dominated
Dry Steam Liquid Dominated
Bi-phase Fluids Steam and Brine
Brine
Developing the Geothermal Resource for Power Generation
Geothermal Well Characteristics Vapor Dominated
Dry Steam Liquid Dominated
Bi-phase Fluids Steam and Brine
Brine
Developing the Geothermal Resource for Power Generation
Geothermal Well Characteristics Vapor Dominated
Dry Steam Liquid Dominated
Bi-phase Fluids Steam and Brine
Brine
Know the Geothermal Resource
What properties are presented by the resource? Fluid Pressure at Wellhead Fluid Temperature at Wellhead
What flow can the well support? Is the resource “clean”?
Geothermal Steam Supply
Wellhead Separators
Steam Collection system Condensate
Properties of the Steam Supply 350 Degree F 210 psi
Steam Separators
Brine collection system
Separator efficiency 20 / 80 ratio
Properties of the Brine 350 Degree F
Basics of Power Generation Conservation of Energy Energy Conversion
Chemical to Heat (Typical Thermal Unit) Heat to Mechanical (Steam Driven
Turbine) Mechanical to Electrical (Generator)
Steam Turbines
Binary Turbines
Generators
3 Phase Power
Differences in Conversion Methods
Steam Systems Single Flash Double Flash
Binary System
Single Flash System
Dual Flash System
Binary System
Blundell Plant
Single Flash Design
Single turbine/Single generator
Turbine design data
Generator design data
Condenser design
Addition of Blundell Unit #2 Heat recovery system Historical Brine flow vs Current Brine flow
340 Degree F vs 210 Degree F
Comparison of Condenser design
Wet type Condenser/Cooling Tower.
Dry Condenser. Pros and Cons of
each type.
Brine re-injection
Conservation of resource
Protection of wells Effects of
Temperature Effects of pH
pH Control method Balance of control System Design
complications
Complications of Unit Operation
• Water Induction (Mass water vs steam)
• Scaling Turbine Blades
• Back-pressure Temperature and
Pressure relationship
Gas in Condensate/Circulating Water
Ambient Temperature
Humidity Wind Direction and
Speed