http://www.biofuelswatch.com/geothermal-development-trends/ Biofuels, bioenergy Wed, 07 Dec 2011 19:25:35 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://www.biofuelswatch.com/geothermal-development-trends/comment-page-1/#comment-1367 Gregory D. MELLOTT Sun, 16 May 2010 01:22:46 +0000 http://www.biofuelswatch.com/?p=1703#comment-1367 I should add that I've have yet to hear of such systems being appended to present geothermal production facilities that are effectively ~wasting~ the heat in the steam they release into the air; now that this lower tempurature generation method is shown to work. Admittedly the facilty would need more 'space' to radiate out the heat at these lower tempuratures; as well at the place to put the turbines and heat exchangers. Though the later two could be put underground if necessary. Yet since many of these facilities are in desert areas they are likely ideally located; as deserts are noted for losing heat to their empty skies, the effect being especially notable at night. [And thus came the word 'desserts' from our forebearers.] Sincerely, gdm I should add that I’ve have yet to hear of such systems being appended to present geothermal production facilities that are effectively ~wasting~ the heat in the steam they release into the air; now that this lower tempurature generation method is shown to work. Admittedly the facilty would need more ‘space’ to radiate out the heat at these lower tempuratures; as well at the place to put the turbines and heat exchangers. Though the later two could be put underground if necessary. Yet since many of these facilities are in desert areas they are likely ideally located; as deserts are noted for losing heat to their empty skies, the effect being especially notable at night. [And thus came the word 'desserts' from our forebearers.]
Sincerely, gdm

]]> http://www.biofuelswatch.com/geothermal-development-trends/comment-page-1/#comment-1366 Gregory D. MELLOTT Sun, 16 May 2010 01:09:25 +0000 http://www.biofuelswatch.com/?p=1703#comment-1366 You barely touch the realm of mega-watt production found possible by using hot water geothermal sources slightly warmer than hot coffee. Your are valid in noting that it is a heat exchange system like domestic geothermal that uses a refrigerant to boil at these lower tempuratures to run turbines to spin generators. They use the same trick to get the pressure gradiaent across the turbine that is used with steam. That being they spray the cooled liquid (refrigerant in this case, instead of the typicaL water with steam) right behind the turbine to cause the warm flowing gas to return to liquid. Sincerely, gdm You barely touch the realm of mega-watt production found possible by using hot water geothermal sources slightly warmer than hot coffee. Your are valid in noting that it is a heat exchange system like domestic geothermal that uses a refrigerant to boil at these lower tempuratures to run turbines to spin generators. They use the same trick to get the pressure gradiaent across the turbine that is used with steam. That being they spray the cooled liquid (refrigerant in this case, instead of the typicaL water with steam) right behind the turbine to cause the warm flowing gas to return to liquid.
Sincerely, gdm

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