Geothermal Resources in the Philippines Flashcards
the heat from the Earth
Geothermal Energy
It is a clean and sustainable energy
Geothermal Energy
Resources of geothermal energy range from the 1. __________________ and 2. ___________ found a few miles beneath the Earth’s surface and down even deeper to the extremely high temperatures of molten rock called 3. __________
- Shallow Ground to Hot water
- Hot rock
- Magma
Refers to the area where a geothermal activity manifest at the earth’s surface or where a geothermal reservoir exists
Geothermal Field
Classification of Geothermal Fields
- Semithermal Fields
- Hyperthermal Wet Fields
- Hyperthermal Dry FIelds
Produces hot water to 100 degrees celsius
Semithermal Fields
Producing hot water and steam
Hyperthermal Wet Fields
Produces dry saturated or superheated steam
Hyperthermal Dry Fields
Refers to all parts of hydrological system including recharge zone, subsurface parts and outflow system
Geothermal System
It is the hot permeable part of a geothermal system where steam and hot fluids were extracted
Geothermal Reservoir
Elements of a Geothermal Energy
- Heat source - magma intruded to shallow levels (< 6km) in the crust in the recent (<100,000 years) past
- Permeabe and porous underground reservoir rock
- impermeable cap rock
- sufficient water to sustain hydrothermal convection
Classification of Geothermal System: Based on the mode of heat transfer
- Convection Geothermal System
- Conductive Geothermal System
Hydrothermal systems associated with regions of young volcanism
Convection geothermal systems
Circulation systems related with tectonically active regions with normal to high heat flow not related to young volcanism
Convective geothermal systems
Characterized by the presence of a porous and pervious reservoir in fractured or porous rock at shallow to moderate depths (100 m to 4.5 km) shallow magmatic intrusion heat source and impermeable cap rock
Convective geothermal systems
