Immagine
 Trilingual World Observatory: italiano, english, română. GLOBAL NEWS & more... di Redazione
   
 
\\ Home Page : Articolo
The world's largest untapped source of solar energy doesn't lie on the vast sands of the Sahara or even atop the high chaparral of the desert Southwest.
By Admin (from 19/06/2012 @ 11:05:17, in en - Global Observatory, read 1459 times)

Instead, it stretches across at least 23 million square miles of earth's tropical oceans; the uppermost layers of which make a prime natural source of thermal energy.

Regardless of time of day or cloud cover, Ocean Thermal Energy Conversion (OTEC) promises to harness this thermal sea-based resource year round.

OTEC production converts heat energy from seawater into kinetic energy using the ocean’s naturally steep temperature gradient.  It’s this juxtaposition of tropical (and sometimes subtropical) subsurface seawater at temperatures typically above 80 degrees F. and below 40 degrees F. that makes OTEC possible.

An OTEC plant literally pumps the warm surface seawater through a heat exchanger connected to a closed circuit filled with several hundred tons of liquid ammonia.  Since ammonia boils at lower temperatures and at lower pressures than water, once the warm seawater hits the heat exchanger, it causes the ammonia to vaporize and expand in volume.  As this ammonia vaporizes, it creates pressure to run a turbine coupled to a generator.  In most cases, the resulting electricity would be delivered onshore via an undersea cable.

Once this ammonia vapor exits the turbine, it flows through a second heat exchanger that is connected to a cold water pipe carrying tons of seawater pumped from depths of 3000 ft.  This cold seawater, in turn, condenses the spent ammonia vapor back into liquid and the whole OTEC process begins again.

But despite the fact that the idea for the technology is more than a century old; to date, OTEC has only been successfully demonstrated on small scales of less than a quarter of a megawatt (MW) and has yet to produce utility-scale power.

Source: Renewable Energy World - via zeitnews.org

Articolo Articolo  Storico Storico Stampa Stampa  Share
Cannabis seeds, Autoflowering seeds, Greenhouse, Sweet Seeds, Dutch Passion
comments powered by Disqus
 
Nessun commento trovato. No comments found. Nici un comentariu găsit.

Anti-Spam: dial the numbers CAPTCHA
Text (max 5000 characters)
Nome - Name - Nume
Link ( OPTIONAL - visible on the site - NOT a must )


Disclaimer
Tuo commento sarŕ visibile dopo la moderazione. - Your comment will be visible after the moderation. - Comentariul tău va fi vizibil după moderare.
Ci sono 3480 persone collegate

< ottobre 2020 >
L
M
M
G
V
S
D
   
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
             

Titolo
en - Global Observatory (605)
en - Science and Society (594)
en - Video Alert (346)
it - Osservatorio Globale (503)
it - Scienze e Societa (555)
it - Video Alerta (132)
ro - Observator Global (399)
ro - Stiinta si Societate (467)
ro - TV Network (149)
z - Games Giochi Jocuri (68)

Catalogati per mese - Filed by month - Arhivate pe luni:

Gli interventi piů cliccati

Ultimi commenti - Last comments - Ultimele comentarii:
Hi, it's Nathan!Pretty much everyone is using voice search with their Siri/Google/Alexa to ask for services and products now, and next year, it'll be EVERYONE of your customers. Imagine what you are ...
15/01/2019 @ 17:58:25
By Nathan
Now Colorado is one love, I'm already packing suitcases;)
14/01/2018 @ 16:07:36
By Napasechnik
Nice read, I just passed this onto a friend who was doing some research on that. And he just bought me lunch since I found it for him smile So let me rephrase that Thank you for lunch! Whenever you ha...
21/11/2016 @ 09:41:39
By Anonimo


Titolo





29/10/2020 @ 06:54:07
script eseguito in 707 ms