19-07-2011, 09:37 AM
Presented by:
JIJO JAMES
OTEC FINAL.pptx (Size: 3.78 MB / Downloads: 175)
OCEAN THERMAL ENERGY CONVERSION (OTEC)
INTRODUCTION
Generating electricity by utilizing temperature difference between shallow and deep water.
The temperature difference can be as high as 25-30 ok in the tropical oceans
2nd law of thermodynamics.
Proposed in 1881 by Jacques Arsene d'Arsonval, a French physicist.
Lambert's law of absorption.
CLASSIFICATION
Depending on the location
Land based plant
Shelf based plant
Floating plant
Depending on the cycle used
Open cycle
Closed cycle
Hybrid cycle
Land-based power plant
This is done so that the outflow does not re enter the plant, which would lower the available temperature difference.
Shelf-based plant
This plant could be towed to the site and affixed to avoid the turbulent surf zone as well as to move closer to the cold-water resource.
Floating power plant
Floating OTEC facilities could be designed to operate off-shore.
OPEN CYCLE
CLOSED CYCLE
HYBRID CYCLE
ADVANTAGES
Eco- friendly.
Uses clean, renewable, natural resources.
Cold water replaces fossil fuels to produce electricity.
Will not produce little or no carbon dioxide or other polluting chemicals.
Minimal maintenance costs compared to other power production plants.
DISADVANTAGES
Low efficiency
High capital costs for initial construction
Potential ecological consequences
Must operate in a corrosive marine environment
Harms marine environment
OTHER APPLICATIONS
Air conditioning
Chilled-soil agriculture
Aquaculture
Desalination
Hydrogen production
Mineral extraction
TECHINICAL DIFFICULTIES
Dissolved gases
Bio fouling
Sealing
COST
$ 40000000 for 10 MW
$ 10000000 Profit pet year
Return of 25%
$ 215000000 for 100MW
$ 100000000 profit per year
Will make profit within 5 years
AVILABLE ENERGY SOURCES
AREA WHERE OTEC WILL WORK
OTEC SITES
Kehole point in the island of Hawaii
Providence Island in the Bahamas
St. Croix in the Virgin Islands
Caribbean islands
Bahamas
Japan
Atlantic costs
Colombia
India
OTEC IN INDIA
1MW OTEC plant in Lakshadweep island at Minicoy
OTEC Ship Sagar Shakti
Kulasekharapatnam in Tamilnadu
Tuticorin
Aluva
Azikkal
SOME PROPOSED PROJECTS
FOR US navy base in the island of Diego Garcia in the Indian ocean
A private U.S. company has proposed a 10-MW OTEC plant on Guam
Alternative Energy Development team with Makai Ocean Engineering to built 10-MW closed cycle OTEC plant in Hawaii in 2013 .
JIJO JAMES
OTEC FINAL.pptx (Size: 3.78 MB / Downloads: 175)
OCEAN THERMAL ENERGY CONVERSION (OTEC)
INTRODUCTION
Generating electricity by utilizing temperature difference between shallow and deep water.
The temperature difference can be as high as 25-30 ok in the tropical oceans
2nd law of thermodynamics.
Proposed in 1881 by Jacques Arsene d'Arsonval, a French physicist.
Lambert's law of absorption.
CLASSIFICATION
Depending on the location
Land based plant
Shelf based plant
Floating plant
Depending on the cycle used
Open cycle
Closed cycle
Hybrid cycle
Land-based power plant
This is done so that the outflow does not re enter the plant, which would lower the available temperature difference.
Shelf-based plant
This plant could be towed to the site and affixed to avoid the turbulent surf zone as well as to move closer to the cold-water resource.
Floating power plant
Floating OTEC facilities could be designed to operate off-shore.
OPEN CYCLE
CLOSED CYCLE
HYBRID CYCLE
ADVANTAGES
Eco- friendly.
Uses clean, renewable, natural resources.
Cold water replaces fossil fuels to produce electricity.
Will not produce little or no carbon dioxide or other polluting chemicals.
Minimal maintenance costs compared to other power production plants.
DISADVANTAGES
Low efficiency
High capital costs for initial construction
Potential ecological consequences
Must operate in a corrosive marine environment
Harms marine environment
OTHER APPLICATIONS
Air conditioning
Chilled-soil agriculture
Aquaculture
Desalination
Hydrogen production
Mineral extraction
TECHINICAL DIFFICULTIES
Dissolved gases
Bio fouling
Sealing
COST
$ 40000000 for 10 MW
$ 10000000 Profit pet year
Return of 25%
$ 215000000 for 100MW
$ 100000000 profit per year
Will make profit within 5 years
AVILABLE ENERGY SOURCES
AREA WHERE OTEC WILL WORK
OTEC SITES
Kehole point in the island of Hawaii
Providence Island in the Bahamas
St. Croix in the Virgin Islands
Caribbean islands
Bahamas
Japan
Atlantic costs
Colombia
India
OTEC IN INDIA
1MW OTEC plant in Lakshadweep island at Minicoy
OTEC Ship Sagar Shakti
Kulasekharapatnam in Tamilnadu
Tuticorin
Aluva
Azikkal
SOME PROPOSED PROJECTS
FOR US navy base in the island of Diego Garcia in the Indian ocean
A private U.S. company has proposed a 10-MW OTEC plant on Guam
Alternative Energy Development team with Makai Ocean Engineering to built 10-MW closed cycle OTEC plant in Hawaii in 2013 .