Talk:Osmotic power

message: I erased the russian part. probably nonsense.
I also erased the part about salinity gradient heat ponds, this has nothing to do at all with the title of the article.
third, I erased the piece about polyethylene. Such a(personal!!) argument has no place here.194.53.253.51 (talk) 14:26, 17 June 2009 (UTC)
thread_title: Erase

message: This article mixes up two different technologies under the title Blue Energy.  Two technologies that might be referred to as "Blue Energy" are muddled up together in this article.  There are (at least?) two different technologies involved in "Blue Energy".  One is RED  (reverse electrodialysis), the other is PRO (pressure retarded osmosis).  RED creates energy due to a chemical process, the chemical potential difference over a semi-permeable membrane generates a voltage.  PRO utilises the pressure difference that exists between the two liquids to drive a turbine.
I have removed the self referencing of RED in the first paragraph and inserted an external reference to the relevant page in a specialist group at an official University site, and have made numerous smallerv edits, requesting references, correcting text to diambiguate the two concepts within the text and to make further research simpler for a reader.
I suggest that the entry for "Blue Energy" be changed to provide links to the technologies that could be being referred to under this catch phrase.  RED and PRO would then become separate articles, to reflect their entirely different bases (one is concerned with harnessing mechanical energy and the other with chemical energy).  There may also be other technologies that would fit under the catch phrase.  
LookingGlass 11:21, 1 December 2007 (UTC)
thread_title:  Mixed up facts 

message: In the Netherlands, for example, more than 3,000 m3 fresh water runs into the sea per second on the average. Theoretically the output is 2.5 MJ or 0.5 kWh/m3. This corresponds to about 3,000 MW, which is about one-third of the national electricity consumption (2005).
:0.5 KWh/m3 ... IN WHAT TIMESCALE? Or did you mean 0.5 KW/m3? (IE only 1.5MW...) And the country really only uses an average of 9GW? For a population of some 16-million-plus, that's awfully sparing. The GLOBAL per capita average is supposed to be 2.2kW (inclusive of everything - street lighting, governments, the lot); do the math. Even with the best will in the world, and using non-electrical sources for as much stuff as possible, a ~560W average is incredibly good for a developed country. 193.63.174.10 (talk) 09:28, 26 February 2009 (UTC)
thread_title:  from the frontpage 

message: What is missing from this discussion is the water potential of the osmosis. the Norwegian Statkraft page gives a figure of 26 bars, corresponding to a hydraulic head of 270 metres. It would be thus trivial to calculate the energy potential. -- Petri Krohn 15:43, 8 October 2007 (UTC)
thread_title:  Water potential 

message: can someone have a look at Blue Energy Tidal power . ? "The vertical axis turbine technology, which has been around since the 1920's, but held back for political reasons,?" However, i would like an advise on the statements made by this CA company, question is related to the naming of the article Blue energy. thanks. Mion 08:07, 8 October 2006 (UTC)
replies: text: This is not the place to propose new articles unrelated to the topic of this article. I do agree that ocean wave power is notable. David spector (talk) 15:13, 29 December 2009 (UTC)
thread_title:  Blue Energy 

message: Its the size of a shipping container: is that a 10ft, 20ft or 40ft container?
Tabby 13:23, 22 February 2007 (UTC)
replies: text: We have one, Hydrogen fuel enhancement, instead of using liquid waste you get from oil drilling its premixing with pure hydrogen (like HCNG) and according to this article there is plenty of hydrogen in production . Mion (talk) 11:55, 20 June 2008 (UTC)

text: Stupid hoax to use the drill blur waste stream instead of the hydrogen waste Mion (talk) 13:54, 20 June 2008 (UTC)
thread_title:  Size 

message: KEMA's blue energy membrane can be named. See http://www.kema.com/nl/consulting_services/power_generation/sustainable_and_distributed_energy/be/ Also, parts of the dutch wikipedia article should be copied. Use google translate  —Preceding unsigned comment added by 81.245.189.98 (talk) 08:46, 23 April 2009 (UTC)
thread_title: KEMA membrane

message: This article includes salinity gradient power yet fails to mention electricity generated in river estuaries through the direct interaction of salt 
and fresh water.Science, Electric Power from Differences in Salinity: The Dialytic Battery, John N. Weinstein and Frank B. Leitz: "An array of alternating anion and cation exchange membranes can be used to generate electric power from the free energy of mixing of river and sea waters"A.T. Jones and W. Finley, Recent Developments in Salinity Gradient Power (Commercial white paper): "Recent developments in pressure-retarded osmosis, vapor compression, reverse dialysis and hydrocratic generation"; “Limited attention has been directed to salinity power because it is so easy to overlook; there is no dramatic change in temperature at a river mouth, and an estuary seems far more tranquil than a 240 m waterfall.” Estuaries are natural sites in which salt and fresh water are in abundant proximity, with no need for evaporation to increase salinity as claimed necessary in this article.
There are 10,800 Google items that mention both "salinity gradient power" and estuaries. That indicates that estuary power is undoubtedly notable. I will merge this information into the article soon after giving editors a chance to reply. David spector (talk) 14:58, 29 December 2009 (UTC)
thread_title:  Estuary electric power 

message: Per the article title renaming proposals expressed above, eventually Osmotic power (in general) and Salinity gradient power (or Estuary power) will probably need to be separate, related articles. I do not offer a specific proposal since there is no rush. David spector (talk) 15:06, 29 December 2009 (UTC)
thread_title: New or split article will be needed

message: This article is factually wrong and needs to be thoroughly revised by someone who understands the physics. For example, the sentence "All energy that is proposed to use salinity gradient technology relies on the evaporation to separate water from salt" is incorrect, as it just takes roughly 3 kJ/l to desalinate seawater by pressing it through a membrane while it requires roughly 2300 kJ/l to desalinate it by evaporating seawater. Consequently, at most 3 kJ/l of power can be generated by mixing seawater with freshwater, not 2300 kJ/l. Pia novice (talk) 14:01, 13 December 2023 (UTC)
thread_title:  Physics need to be revised