The generation of electricity from solar energy of Low Enthalpy Resources indicates temperatures around 300C in the "Hot Source" and 25C in the "Cold Source". Working fluid would be "NH4OH" solution, or as alternative, "Freon Green gas. The overall efficiency of the system will be 12%. The carbon gas (CO2) working as thermodynamic fluid reduces the efficiency of the system to 4%. However, results lower equipment costs in the case of market choice for household applications. There will be good return over investments (ROI), independent of the Organic Rankine Cycle ( ORC ) with low efficiency because low temperature at hot source. The free, clean and renewable solar energy largely offset fuel costs, more logistic, store and handling of products like: biogas, biomass, natural gas, and diesel, as usual, in thermodynamics cycles of power plants, working with hot source in the range of 500C. Differences in implementation costs between PVs and solar thermo mechanics power plants are significant! Fixed PV panels towards to the South Geographic (in the northern hemisphere) has high implementation cost in terms of availability of energy put in "Watts per square meter of land, produced with reasonable efficiency only during days up to six hours (10am to 16 pm). PVs are even more expensive in "KW" consumed in the morning, evening and night, with energy demand in 110V 50/60 Hz ( KWh ) through bank of batteries, inverters and load controller. However, PVs are visually beautiful and from the point of view of financial investor require simple maintenance. In practice, does not occur in power plants. The attractive appearance and simplicity of a simple panel, used to supply "very light 12V DC electric loads" promotes easy marketing business, among other interests away from engineering field. REEDICAO DE ENERGIA TERMICA SOLAR Por que sera que no Brasil usinas termoeletricas de fonte solar (CSP Solar no Google, em Ingles) com potencia de saida por exemplo, de 1 MW e de 50 MW nao sao colocadas para debates de viabilidade economica e tecnica, sendo sempre presumidas pelas pessoas da area como complexas e muito caras quando expressas em R$/Watt e Watt/m2 ? Considerando a vasta area geografica com forte insolacao do Brasil (600 W/m2 - Ver Blogs anteriores) acima do Tropico de Capricornio (Lat. 23S) sera que 100W/m2uteis durante pelo menos 16 horas/dia, com armazenagem de calor solar no subsolo, seria pouco diante de hidroeletricas que dificilmente chegam aos 12W/m2 na grande area inundada. Presume haver reserva hidrica para fins de geracao eletrica.Usinas solares nao sao complexas e nem caras quando comparadas com custos primarios totalizados das usinas hidroeletricas mais custos de linhas de transmissao! Por razoes praticas, hoje eu prefiro pesquisar e desenvolver outros meios alternativos para gerar energia eletrica limpa e sustentavel. Entretanto, como brasileiro torco para ganhar uma Mega Sena! Nesta hipotese, sairia em busca da Universidade "TAL" pagando os precos do Projeto Tecnico e depois do Projeto Executivo por minha propria conta, ainda que fosse para nada fazer. Cumpriria o meu dever quanto a sustentabilidade da Vida e do Meio Ambiente, consciente que no Brasil nao ha