Energy 2.0

Applications of Ocean Thermal Energy Conversion -Otec

Posted on: June 23, 2008

Aside from the generation of electricity, it has been proposed that OTEC plants could assist ocean based industries, such as aquaculture, refrigeration and air conditioning, desalinated water crop irrigation and consumption as well as mineral extraction through the use of the fresh and chilled water byproducts

 

OTEC has important benefits other than power production.

1) Air conditioning

Air conditioning can be a byproduct. Spent cold seawater from an OTEC plant can chill fresh water in a heat exchanger or flow directly into a cooling system. Chilled-

2) Soil agriculture

OTEC technology also supports chilled-soil agriculture. When cold seawater flows through underground pipes, it chills the surrounding soil. The temperature difference between plant roots in the cool soil and plant leaves in the warm air allows many plants that evolved in temperate climates to be grown in the subtropics.

3) Desalination

An OTEC plant that generates 2-MW of net electricity could produce about 4,300 cubic meters (14,118.3 cubic feet) of desalinated water each day.

4) Mineral extraction

An OTEC plant that generates 2-MW of net electricity could produce about 4,300 cubic meters (14,118.3 cubic feet) of desalinated water each day.

 

Some Major Otec Power Plants in World

 

 

Sr.No

LOCATION

YEAR

CAPACITY(KW)

1

Matanzas Bay Hawana Cuba

1930

NA

2

Abidjan Ivory coast

1956

7000

3

Hawaii.U.S.A

1979

50

4

Hawaii.U.S.A

1981

1000

5

Republic of Nauru

1981

100

6

Tokunoshima Japan

1982

52

7

Hawaii.U.S.A

Proposed

49000

8

Bali, Indonesia

Proposed

230

9

Jamaica,West Pacific

Proposed

1580

10

Tahiti,Central Pacific

Proposed

5000

11

Republic of Nauru

Proposed

2500

12

Kalashakharapattanam ,India

Proposed

100000

13

Andhra Pradesh

Proposed

100000

 

India possess excellent thermal gradients and some of the best sites in the world for harnessing OTEC power India has a potential of exploiting 80,000 MW of OTEC based power. Some of the coastal regions of Tamil Nadu and Andhra Pradesh provide excellent sites for OTEC plants. Although the theoretical efficiency of OTEC is small (~2%), there are vast quantities of sea water available for use in power generation. It has been estimated that there could be as much as 107 MW power available worldwide.

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