tag:blogger.com,1999:blog-7597656451205429515.post8880907421581980854..comments2024-02-16T17:52:44.944-06:00Comments on The Nuclear Green Revolution: Nuclear Co-generation: Good Idea Coming Back in the Czech Republic.Charles Bartonhttp://www.blogger.com/profile/01125297013064527425noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-7597656451205429515.post-85758755439280396862010-09-01T11:02:13.533-05:002010-09-01T11:02:13.533-05:00Just curious, any figure about the loss of electri...Just curious, any figure about the loss of electric power in a such project, considering LWRs are quite low temp engines (are the long distance from the nuclear site to the end city users) ? I guess something in the 0,10-0,15 MWe per MW thermal produced, at least.<br /><br />However, agree that molten salt reactors - being higher temp reactors (than LWR) - can do the same work much better (including desalination in costal sites)Alex P.noreply@blogger.comtag:blogger.com,1999:blog-7597656451205429515.post-32456510483833974252010-08-30T19:20:22.600-05:002010-08-30T19:20:22.600-05:00If the reactor is sited a to far from a city for d...If the reactor is sited a to far from a city for district heating the waste heat could still be used for warming greenhouses.Jim Baergnoreply@blogger.comtag:blogger.com,1999:blog-7597656451205429515.post-32334324990653237372010-08-29T01:25:16.881-05:002010-08-29T01:25:16.881-05:00The biggest obstacle is not technology, but public...The biggest obstacle is not technology, but public acceptance. More education and efficient PR are needed ...Yordan Georgievhttps://www.blogger.com/profile/03314222795726618555noreply@blogger.comtag:blogger.com,1999:blog-7597656451205429515.post-15486410137998104312010-08-24T09:47:34.539-05:002010-08-24T09:47:34.539-05:00The biggest limit to cogeneration is the large los...The biggest limit to cogeneration is the large loss of heat in pipes -- it is not possible to transport the heat very far. By comparison, electricity can be transported over large distances with much smaller losses.<br /><br />At the end of the posting NNadir makes reference to heat pumps. This is the enabling technology. At some distance, not too far from the heat source, it is more econonmical and efficient to transport electricity rather than heat, and then use heat pumps. Especially good are geo-sourced heat pumps. Their efficiency is so high that they can more than overcome the thermodynamic losses of the generating plant, yielding effective heating efficiency over 100%.<br /><br />This is the beauty of the conversion of lower grade energy (heat) to higher grade energy (electricity and mechanical work) by means of the laws of thermodynamics. The high grade energy can do more things, including pumping heat to provide space heating and water heating at effective efficiencies over 100%.<br /><br />The reject heat from an electrical power plant is a free waste product, but making use of it is not free. The key then is to use it where it make economic sense. Those uses must compete with things like heat pumps, and economics will dictate the point where the crossover is made.<br /><br />The bigger point is the siting of nuclear power plants. If society can overcome it irrational fear of nuclear power, especially for something as inherently safe as a LFTR, nuclear power plants could be sited underground in the middle of cities, providing close-by demand for the reject heat from the electrical generation, and providing electricity with minimal losses.donbnoreply@blogger.com