SlideShare a Scribd company logo
1 of 20
• Done by;
• Sujan kharel
• 2015-10-13
Geothermal EnergyGeothermal Energy
INTRODUCTIONINTRODUCTION
The term Geothermal originates from two Geek
words 'GEO' and 'THERM'. The Greek word ‘geo’
meant the earth whilst their word for ‘therm’ meant
heat from the earth.
Geothermal energy is the energy obtained from the
earth(geo) from the hot rocks present inside the
earth.
It is produced due to the fission of radioactive
materials in the earth’s core and some places
inside the earth become very hot. These are called
hot spots.
Different Geothermal EnergyDifferent Geothermal Energy
SourcesSources
•Hot Water Reservoirs: As the name implies these are
reservoirs of hot underground water. They are more
suited for space heating than for electricity production.
•Natural Stem Reservoirs: In this case a hole dug into
the ground can cause steam to come to the surface.
•Geo pressured Reservoirs: In this type of reserve,
brine completely saturated with natural gas in stored
under pressure from the weight of overlying rock. This
type of resource can be used for both heat and for
natural gas.
Generation of Electricity isGeneration of Electricity is
appropriate for sources >150appropriate for sources >150oo
CC
Dry Steam Plants: These were the first type of plants created. They use
underground steam to directly turn the turbines.
Flash Steam Plants: These are the most common plants. These systems pull
deep, high pressured hot water that reaches temperatures of 3600
F or more to
the surface. This water is transported to low pressure chambers, and the
resulting steam drives the turbines. The remaining water and steam are then
injected back into the source from which they were taken.
Binary Cycle Plants: This system passes moderately hot geothermal water
past a liquid, usually an organic fluid, that has a lower boiling point. The
resulting steam from the organic liquid drives the turbines. This process
does not produce any emissions and the water temperature needed for
the water is lower than that needed in the Flash Steam Plants (2500
F –
3600
F).
Casa Diablo
Hot Dry Rocks: The simplest models have one injection well and two
production wells. Pressurized cold water is sent down the injection well
where the hot rocks heat the water up. Then pressurized water of
temperatures greater than 2000
F is brought to the surface and passed
near a liquid with a lower boiling temperature, such as an organic liquid
like butane. The ensuing steam turns the turbines. Then, the cool water
is again injected to be heated. This system does not produce any
emissions. US geothermal industries are making plans to commercialize
this new technology.
•Electricity generated by geothermal plants saves 83.3
million barrels of fuel each year from being burned world
wide. This prevents 40.2 million tons of CO2 from being
emitted into the atmosphere.
•Direct use of geothermal energy prevents 103.6 million
barrels of fuel each year from being burned world wide.
This stops 49.6 tons of CO2 from being emitted into the
atmosphere.
Direct uses of geothermal energy isDirect uses of geothermal energy is
appropriate for sources below 150appropriate for sources below 15000
CC
• space heating
• air conditioning
• industrial processes
• drying
• Greenhouses
• Aguaculture
• hot water
• resorts and pools
• melting snow
Geothermal production of energy is 3rd highest among
renewable energies. It is behind hydro and biomass,
but before solar and wind.
Iceland is one of the more countries successful in
using geothermal energy:
-86% of their space heating uses geothermal energy.
-16% of their electricity generation uses geothermal
energy.
World Wide Geothermal Uses andWorld Wide Geothermal Uses and
PotentialPotential
Geothermal’s Harmful EffectsGeothermal’s Harmful Effects
• Brine(salt water) can salinate (losing one’s or its original nature)soil if the
water is not injected back into the reserve after the heat is extracted.
• Extracting large amounts of water can cause land subsidence, and this can
lead to an increase in seismic activity. To prevented this the cooled water
must be injected back into the reserve in order to keep the water pressure
constant underground.
• Power plants that do not inject the cooled water back into the ground can
release H2S, the “rotten eggs” gas. This gas can cause problems if large
quantities escape because inhaling too much is fatal.
• There is the fear of noise pollution during the drilling of wells.
Advantages of Geothermal EnergyAdvantages of Geothermal Energy
1) It is a renewable source of energy.1) It is a renewable source of energy.
2) By far, it is non-polluting and environment2) By far, it is non-polluting and environment
friendly.friendly.
3) There is no wastage or generation of by-3) There is no wastage or generation of by-
products.products.
4) Geothermal energy can be used directly.4) Geothermal energy can be used directly.
In ancient times, people used this source ofIn ancient times, people used this source of
energy for heating homes, cooking, etc.energy for heating homes, cooking, etc.
5) Maintenance cost of geothermal power5) Maintenance cost of geothermal power
plants is very less.plants is very less.
6) Geothermal power plants don't occupy6) Geothermal power plants don't occupy
too much space and thus help in protectingtoo much space and thus help in protecting
natural environment.natural environment.
7) Unlike solar energy, it is not dependent7) Unlike solar energy, it is not dependent
on the weather conditions.on the weather conditions.
Disadvantages of Geothermal EnergyDisadvantages of Geothermal Energy
1) Only few sites have the potential of Geothermal1) Only few sites have the potential of Geothermal
Energy.Energy.
2) Most of the sites, where geothermal energy is2) Most of the sites, where geothermal energy is
produced, are far from markets or cities, where it needsproduced, are far from markets or cities, where it needs
to be consumed.to be consumed.
3) Total generation potential of this source is too small.3) Total generation potential of this source is too small.
4) There is always a danger of eruption of volcano.4) There is always a danger of eruption of volcano.
5) Installation cost of steam power plant is5) Installation cost of steam power plant is
very high.very high.
6) There is no guarantee that the amount of6) There is no guarantee that the amount of
energy which is produced will justify theenergy which is produced will justify the
capital expenditure and operations costs.capital expenditure and operations costs.
7) It may release some harmful, poisonous7) It may release some harmful, poisonous
gases that can escape through the holesgases that can escape through the holes
drilled during construction.drilled during construction.
THANK YOU!!THANK YOU!!

More Related Content

What's hot (20)

geo thermal energy
geo thermal energygeo thermal energy
geo thermal energy
 
The Geothermal Power Plant
The Geothermal Power PlantThe Geothermal Power Plant
The Geothermal Power Plant
 
Geothermal power plant
Geothermal power plantGeothermal power plant
Geothermal power plant
 
Geothermal Energy Systems
Geothermal Energy SystemsGeothermal Energy Systems
Geothermal Energy Systems
 
Geothermal Energy
Geothermal EnergyGeothermal Energy
Geothermal Energy
 
geothermal energy
geothermal energygeothermal energy
geothermal energy
 
OTEC (Ocean Thermal Energy Conversion)
OTEC (Ocean Thermal Energy Conversion)OTEC (Ocean Thermal Energy Conversion)
OTEC (Ocean Thermal Energy Conversion)
 
Renewable energy
Renewable energyRenewable energy
Renewable energy
 
geothermal resources
geothermal resources geothermal resources
geothermal resources
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal
GeothermalGeothermal
Geothermal
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Renewable source-of-energy
Renewable source-of-energyRenewable source-of-energy
Renewable source-of-energy
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Solar Thermal Applications And Technologies Gsespl
Solar Thermal Applications And Technologies   GsesplSolar Thermal Applications And Technologies   Gsespl
Solar Thermal Applications And Technologies Gsespl
 
Wind energy
Wind energyWind energy
Wind energy
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal Energy: Advantages, Disadvantages, Economics and Policy
Geothermal Energy: Advantages, Disadvantages, Economics and Policy Geothermal Energy: Advantages, Disadvantages, Economics and Policy
Geothermal Energy: Advantages, Disadvantages, Economics and Policy
 
Wind farms
Wind farmsWind farms
Wind farms
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 

Viewers also liked

6565045 Geothermal Energy
6565045  Geothermal  Energy6565045  Geothermal  Energy
6565045 Geothermal EnergyHenry Maeda
 
A ELABORACIÓN DO VIÑO
A ELABORACIÓN DO VIÑOA ELABORACIÓN DO VIÑO
A ELABORACIÓN DO VIÑOazuguay
 
тезисы основы преобразующего мышления
тезисы основы преобразующего мышлениятезисы основы преобразующего мышления
тезисы основы преобразующего мышленияТатьяна Гришина
 
Critical thinking as modus operandi alice ghimisian
Critical thinking as modus operandi  alice ghimisianCritical thinking as modus operandi  alice ghimisian
Critical thinking as modus operandi alice ghimisianAndrew Katz
 
кейс образовательное право наумкина-1
кейс  образовательное право наумкина-1кейс  образовательное право наумкина-1
кейс образовательное право наумкина-1Виктория Горбунова
 
гришина диагностическая карта
гришина диагностическая картагришина диагностическая карта
гришина диагностическая картаТатьяна Гришина
 
The Simple Anatomy of a Sales Funnel
The Simple Anatomy of a Sales FunnelThe Simple Anatomy of a Sales Funnel
The Simple Anatomy of a Sales FunnelRichard Seaton
 
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULACarlaCasti
 
창발
창발창발
창발현경 이
 
ERNESTO DOMNGOS JOSE CAMILO CV
ERNESTO DOMNGOS JOSE CAMILO CVERNESTO DOMNGOS JOSE CAMILO CV
ERNESTO DOMNGOS JOSE CAMILO CVErnesto Camilo
 
кейс содержание образования наумкина
кейс  содержание образования наумкинакейс  содержание образования наумкина
кейс содержание образования наумкинаВиктория Горбунова
 
задание региональная политика
задание региональная политиказадание региональная политика
задание региональная политикаТатьяна Гришина
 
аналитическая справка часть 1 и часть 2
аналитическая справка часть 1 и часть 2аналитическая справка часть 1 и часть 2
аналитическая справка часть 1 и часть 2Татьяна Гришина
 
Размышления о преобразующем мышлении
Размышления о преобразующем мышленииРазмышления о преобразующем мышлении
Размышления о преобразующем мышленииВиктория Горбунова
 

Viewers also liked (20)

6565045 Geothermal Energy
6565045  Geothermal  Energy6565045  Geothermal  Energy
6565045 Geothermal Energy
 
A ELABORACIÓN DO VIÑO
A ELABORACIÓN DO VIÑOA ELABORACIÓN DO VIÑO
A ELABORACIÓN DO VIÑO
 
Wwm resume
Wwm resumeWwm resume
Wwm resume
 
тезисы основы преобразующего мышления
тезисы основы преобразующего мышлениятезисы основы преобразующего мышления
тезисы основы преобразующего мышления
 
401
401401
401
 
механизмы развития нормы
механизмы развития нормымеханизмы развития нормы
механизмы развития нормы
 
Critical thinking as modus operandi alice ghimisian
Critical thinking as modus operandi  alice ghimisianCritical thinking as modus operandi  alice ghimisian
Critical thinking as modus operandi alice ghimisian
 
кейс образовательное право наумкина-1
кейс  образовательное право наумкина-1кейс  образовательное право наумкина-1
кейс образовательное право наумкина-1
 
гришина диагностическая карта
гришина диагностическая картагришина диагностическая карта
гришина диагностическая карта
 
The Simple Anatomy of a Sales Funnel
The Simple Anatomy of a Sales FunnelThe Simple Anatomy of a Sales Funnel
The Simple Anatomy of a Sales Funnel
 
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA
08_SINGULARS_PRESENTACIÓ_MOOC_EDUCACIÓ_EMOCIONAL_AULA
 
창발
창발창발
창발
 
ERNESTO DOMNGOS JOSE CAMILO CV
ERNESTO DOMNGOS JOSE CAMILO CVERNESTO DOMNGOS JOSE CAMILO CV
ERNESTO DOMNGOS JOSE CAMILO CV
 
кейс содержание образования наумкина
кейс  содержание образования наумкинакейс  содержание образования наумкина
кейс содержание образования наумкина
 
задание региональная политика
задание региональная политиказадание региональная политика
задание региональная политика
 
Web
WebWeb
Web
 
PhD Jury Reports
PhD Jury ReportsPhD Jury Reports
PhD Jury Reports
 
Hibrido dinámico local
Hibrido dinámico localHibrido dinámico local
Hibrido dinámico local
 
аналитическая справка часть 1 и часть 2
аналитическая справка часть 1 и часть 2аналитическая справка часть 1 и часть 2
аналитическая справка часть 1 и часть 2
 
Размышления о преобразующем мышлении
Размышления о преобразующем мышленииРазмышления о преобразующем мышлении
Размышления о преобразующем мышлении
 

Similar to Geothermal energy -ppt. by sujan kharel(Ansal university)

Similar to Geothermal energy -ppt. by sujan kharel(Ansal university) (20)

Geothermal energy 0
Geothermal energy 0Geothermal energy 0
Geothermal energy 0
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal Energy(By Mithun Kumer Ghose)dufelt
Geothermal Energy(By Mithun Kumer Ghose)dufeltGeothermal Energy(By Mithun Kumer Ghose)dufelt
Geothermal Energy(By Mithun Kumer Ghose)dufelt
 
Geothermal energy in environmental geology
Geothermal energy in environmental geologyGeothermal energy in environmental geology
Geothermal energy in environmental geology
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal-Energy_0.ppt
Geothermal-Energy_0.pptGeothermal-Energy_0.ppt
Geothermal-Energy_0.ppt
 
Savio Vales - Geothermal Energy
Savio Vales -  Geothermal EnergySavio Vales -  Geothermal Energy
Savio Vales - Geothermal Energy
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal energy finalby SP
Geothermal energy finalby SPGeothermal energy finalby SP
Geothermal energy finalby SP
 
geothermal.pptx
geothermal.pptxgeothermal.pptx
geothermal.pptx
 
geothermal ppt.pptx
geothermal ppt.pptxgeothermal ppt.pptx
geothermal ppt.pptx
 
Renewable energy resources
Renewable energy resourcesRenewable energy resources
Renewable energy resources
 
Enhanced geothermal system
Enhanced geothermal systemEnhanced geothermal system
Enhanced geothermal system
 
Geothermal2.09
Geothermal2.09Geothermal2.09
Geothermal2.09
 
geothermal power plant fiji
geothermal power plant fijigeothermal power plant fiji
geothermal power plant fiji
 
Geo thermal ppt
Geo thermal pptGeo thermal ppt
Geo thermal ppt
 
Geothermal energy
Geothermal energyGeothermal energy
Geothermal energy
 
Geothermal power plant
Geothermal power plantGeothermal power plant
Geothermal power plant
 
Thermodynamics of Geothermal energy
Thermodynamics of Geothermal energyThermodynamics of Geothermal energy
Thermodynamics of Geothermal energy
 
Geothermal Energy in Egypt
Geothermal Energy in EgyptGeothermal Energy in Egypt
Geothermal Energy in Egypt
 

Recently uploaded

Malware Detection By Machine Learning Presentation.pptx
Malware Detection By Machine Learning  Presentation.pptxMalware Detection By Machine Learning  Presentation.pptx
Malware Detection By Machine Learning Presentation.pptxalishapatidar2021
 
Novel 3D-Printed Soft Linear and Bending Actuators
Novel 3D-Printed Soft Linear and Bending ActuatorsNovel 3D-Printed Soft Linear and Bending Actuators
Novel 3D-Printed Soft Linear and Bending ActuatorsResearcher Researcher
 
"Exploring the Essential Functions and Design Considerations of Spillways in ...
"Exploring the Essential Functions and Design Considerations of Spillways in ..."Exploring the Essential Functions and Design Considerations of Spillways in ...
"Exploring the Essential Functions and Design Considerations of Spillways in ...Erbil Polytechnic University
 
Main Memory Management in Operating System
Main Memory Management in Operating SystemMain Memory Management in Operating System
Main Memory Management in Operating SystemRashmi Bhat
 
Internship PPT ukai thermal power station .pptx
Internship PPT ukai thermal power station .pptxInternship PPT ukai thermal power station .pptx
Internship PPT ukai thermal power station .pptxmalikavita731
 
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptx
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptxGSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptx
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptxshuklamittt0077
 
Work Experience-Dalton Park.pptxfvvvvvvv
Work Experience-Dalton Park.pptxfvvvvvvvWork Experience-Dalton Park.pptxfvvvvvvv
Work Experience-Dalton Park.pptxfvvvvvvvLewisJB
 
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTION
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTIONTHE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTION
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTIONjhunlian
 
Research Methodology for Engineering pdf
Research Methodology for Engineering pdfResearch Methodology for Engineering pdf
Research Methodology for Engineering pdfCaalaaAbdulkerim
 
Risk Management in Engineering Construction Project
Risk Management in Engineering Construction ProjectRisk Management in Engineering Construction Project
Risk Management in Engineering Construction ProjectErbil Polytechnic University
 
Earthing details of Electrical Substation
Earthing details of Electrical SubstationEarthing details of Electrical Substation
Earthing details of Electrical Substationstephanwindworld
 
Katarzyna Lipka-Sidor - BIM School Course
Katarzyna Lipka-Sidor - BIM School CourseKatarzyna Lipka-Sidor - BIM School Course
Katarzyna Lipka-Sidor - BIM School Coursebim.edu.pl
 
List of Accredited Concrete Batching Plant.pdf
List of Accredited Concrete Batching Plant.pdfList of Accredited Concrete Batching Plant.pdf
List of Accredited Concrete Batching Plant.pdfisabel213075
 
Indian Dairy Industry Present Status and.ppt
Indian Dairy Industry Present Status and.pptIndian Dairy Industry Present Status and.ppt
Indian Dairy Industry Present Status and.pptMadan Karki
 
home automation using Arduino by Aditya Prasad
home automation using Arduino by Aditya Prasadhome automation using Arduino by Aditya Prasad
home automation using Arduino by Aditya Prasadaditya806802
 
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...Erbil Polytechnic University
 
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdf
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdfCCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdf
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdfAsst.prof M.Gokilavani
 
National Level Hackathon Participation Certificate.pdf
National Level Hackathon Participation Certificate.pdfNational Level Hackathon Participation Certificate.pdf
National Level Hackathon Participation Certificate.pdfRajuKanojiya4
 
Gravity concentration_MI20612MI_________
Gravity concentration_MI20612MI_________Gravity concentration_MI20612MI_________
Gravity concentration_MI20612MI_________Romil Mishra
 

Recently uploaded (20)

Malware Detection By Machine Learning Presentation.pptx
Malware Detection By Machine Learning  Presentation.pptxMalware Detection By Machine Learning  Presentation.pptx
Malware Detection By Machine Learning Presentation.pptx
 
Novel 3D-Printed Soft Linear and Bending Actuators
Novel 3D-Printed Soft Linear and Bending ActuatorsNovel 3D-Printed Soft Linear and Bending Actuators
Novel 3D-Printed Soft Linear and Bending Actuators
 
"Exploring the Essential Functions and Design Considerations of Spillways in ...
"Exploring the Essential Functions and Design Considerations of Spillways in ..."Exploring the Essential Functions and Design Considerations of Spillways in ...
"Exploring the Essential Functions and Design Considerations of Spillways in ...
 
Main Memory Management in Operating System
Main Memory Management in Operating SystemMain Memory Management in Operating System
Main Memory Management in Operating System
 
Internship PPT ukai thermal power station .pptx
Internship PPT ukai thermal power station .pptxInternship PPT ukai thermal power station .pptx
Internship PPT ukai thermal power station .pptx
 
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptx
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptxGSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptx
GSK & SEAMANSHIP-IV LIFE SAVING APPLIANCES .pptx
 
Work Experience-Dalton Park.pptxfvvvvvvv
Work Experience-Dalton Park.pptxfvvvvvvvWork Experience-Dalton Park.pptxfvvvvvvv
Work Experience-Dalton Park.pptxfvvvvvvv
 
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTION
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTIONTHE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTION
THE SENDAI FRAMEWORK FOR DISASTER RISK REDUCTION
 
Research Methodology for Engineering pdf
Research Methodology for Engineering pdfResearch Methodology for Engineering pdf
Research Methodology for Engineering pdf
 
Risk Management in Engineering Construction Project
Risk Management in Engineering Construction ProjectRisk Management in Engineering Construction Project
Risk Management in Engineering Construction Project
 
Earthing details of Electrical Substation
Earthing details of Electrical SubstationEarthing details of Electrical Substation
Earthing details of Electrical Substation
 
Katarzyna Lipka-Sidor - BIM School Course
Katarzyna Lipka-Sidor - BIM School CourseKatarzyna Lipka-Sidor - BIM School Course
Katarzyna Lipka-Sidor - BIM School Course
 
List of Accredited Concrete Batching Plant.pdf
List of Accredited Concrete Batching Plant.pdfList of Accredited Concrete Batching Plant.pdf
List of Accredited Concrete Batching Plant.pdf
 
Indian Dairy Industry Present Status and.ppt
Indian Dairy Industry Present Status and.pptIndian Dairy Industry Present Status and.ppt
Indian Dairy Industry Present Status and.ppt
 
home automation using Arduino by Aditya Prasad
home automation using Arduino by Aditya Prasadhome automation using Arduino by Aditya Prasad
home automation using Arduino by Aditya Prasad
 
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...
Comparative study of High-rise Building Using ETABS,SAP200 and SAFE., SAFE an...
 
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdf
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdfCCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdf
CCS355 Neural Networks & Deep Learning Unit 1 PDF notes with Question bank .pdf
 
Designing pile caps according to ACI 318-19.pptx
Designing pile caps according to ACI 318-19.pptxDesigning pile caps according to ACI 318-19.pptx
Designing pile caps according to ACI 318-19.pptx
 
National Level Hackathon Participation Certificate.pdf
National Level Hackathon Participation Certificate.pdfNational Level Hackathon Participation Certificate.pdf
National Level Hackathon Participation Certificate.pdf
 
Gravity concentration_MI20612MI_________
Gravity concentration_MI20612MI_________Gravity concentration_MI20612MI_________
Gravity concentration_MI20612MI_________
 

Geothermal energy -ppt. by sujan kharel(Ansal university)

  • 1. • Done by; • Sujan kharel • 2015-10-13
  • 3. INTRODUCTIONINTRODUCTION The term Geothermal originates from two Geek words 'GEO' and 'THERM'. The Greek word ‘geo’ meant the earth whilst their word for ‘therm’ meant heat from the earth. Geothermal energy is the energy obtained from the earth(geo) from the hot rocks present inside the earth. It is produced due to the fission of radioactive materials in the earth’s core and some places inside the earth become very hot. These are called hot spots.
  • 4. Different Geothermal EnergyDifferent Geothermal Energy SourcesSources •Hot Water Reservoirs: As the name implies these are reservoirs of hot underground water. They are more suited for space heating than for electricity production. •Natural Stem Reservoirs: In this case a hole dug into the ground can cause steam to come to the surface. •Geo pressured Reservoirs: In this type of reserve, brine completely saturated with natural gas in stored under pressure from the weight of overlying rock. This type of resource can be used for both heat and for natural gas.
  • 5. Generation of Electricity isGeneration of Electricity is appropriate for sources >150appropriate for sources >150oo CC Dry Steam Plants: These were the first type of plants created. They use underground steam to directly turn the turbines.
  • 6. Flash Steam Plants: These are the most common plants. These systems pull deep, high pressured hot water that reaches temperatures of 3600 F or more to the surface. This water is transported to low pressure chambers, and the resulting steam drives the turbines. The remaining water and steam are then injected back into the source from which they were taken.
  • 7. Binary Cycle Plants: This system passes moderately hot geothermal water past a liquid, usually an organic fluid, that has a lower boiling point. The resulting steam from the organic liquid drives the turbines. This process does not produce any emissions and the water temperature needed for the water is lower than that needed in the Flash Steam Plants (2500 F – 3600 F). Casa Diablo
  • 8. Hot Dry Rocks: The simplest models have one injection well and two production wells. Pressurized cold water is sent down the injection well where the hot rocks heat the water up. Then pressurized water of temperatures greater than 2000 F is brought to the surface and passed near a liquid with a lower boiling temperature, such as an organic liquid like butane. The ensuing steam turns the turbines. Then, the cool water is again injected to be heated. This system does not produce any emissions. US geothermal industries are making plans to commercialize this new technology.
  • 9. •Electricity generated by geothermal plants saves 83.3 million barrels of fuel each year from being burned world wide. This prevents 40.2 million tons of CO2 from being emitted into the atmosphere. •Direct use of geothermal energy prevents 103.6 million barrels of fuel each year from being burned world wide. This stops 49.6 tons of CO2 from being emitted into the atmosphere.
  • 10.
  • 11. Direct uses of geothermal energy isDirect uses of geothermal energy is appropriate for sources below 150appropriate for sources below 15000 CC • space heating • air conditioning • industrial processes • drying • Greenhouses • Aguaculture • hot water • resorts and pools • melting snow
  • 12. Geothermal production of energy is 3rd highest among renewable energies. It is behind hydro and biomass, but before solar and wind. Iceland is one of the more countries successful in using geothermal energy: -86% of their space heating uses geothermal energy. -16% of their electricity generation uses geothermal energy.
  • 13. World Wide Geothermal Uses andWorld Wide Geothermal Uses and PotentialPotential
  • 14. Geothermal’s Harmful EffectsGeothermal’s Harmful Effects • Brine(salt water) can salinate (losing one’s or its original nature)soil if the water is not injected back into the reserve after the heat is extracted. • Extracting large amounts of water can cause land subsidence, and this can lead to an increase in seismic activity. To prevented this the cooled water must be injected back into the reserve in order to keep the water pressure constant underground. • Power plants that do not inject the cooled water back into the ground can release H2S, the “rotten eggs” gas. This gas can cause problems if large quantities escape because inhaling too much is fatal. • There is the fear of noise pollution during the drilling of wells.
  • 15. Advantages of Geothermal EnergyAdvantages of Geothermal Energy 1) It is a renewable source of energy.1) It is a renewable source of energy. 2) By far, it is non-polluting and environment2) By far, it is non-polluting and environment friendly.friendly. 3) There is no wastage or generation of by-3) There is no wastage or generation of by- products.products. 4) Geothermal energy can be used directly.4) Geothermal energy can be used directly. In ancient times, people used this source ofIn ancient times, people used this source of energy for heating homes, cooking, etc.energy for heating homes, cooking, etc.
  • 16. 5) Maintenance cost of geothermal power5) Maintenance cost of geothermal power plants is very less.plants is very less. 6) Geothermal power plants don't occupy6) Geothermal power plants don't occupy too much space and thus help in protectingtoo much space and thus help in protecting natural environment.natural environment. 7) Unlike solar energy, it is not dependent7) Unlike solar energy, it is not dependent on the weather conditions.on the weather conditions.
  • 17. Disadvantages of Geothermal EnergyDisadvantages of Geothermal Energy 1) Only few sites have the potential of Geothermal1) Only few sites have the potential of Geothermal Energy.Energy. 2) Most of the sites, where geothermal energy is2) Most of the sites, where geothermal energy is produced, are far from markets or cities, where it needsproduced, are far from markets or cities, where it needs to be consumed.to be consumed. 3) Total generation potential of this source is too small.3) Total generation potential of this source is too small. 4) There is always a danger of eruption of volcano.4) There is always a danger of eruption of volcano.
  • 18. 5) Installation cost of steam power plant is5) Installation cost of steam power plant is very high.very high. 6) There is no guarantee that the amount of6) There is no guarantee that the amount of energy which is produced will justify theenergy which is produced will justify the capital expenditure and operations costs.capital expenditure and operations costs. 7) It may release some harmful, poisonous7) It may release some harmful, poisonous gases that can escape through the holesgases that can escape through the holes drilled during construction.drilled during construction.
  • 19.