IT1253836B - Cogeneration of electric and cryogenic energy from renewable sources - Google Patents

Abstract

The new production process involves the production of electric and cryogenic energy by neutralisation and forced filtration treatment of smoke fumes, recuperating the molecular nitrogen which can be transformed into liquefied gas, as well as the heat generated by the multiphase compression and the appreciable heat at thermal power stations which utilise fossil and/or unconventional fuels, without emitting any pollutant into the outside environment. The thermodynamic process utilises organic fluids or those of another type with high molecular weight in replacement of the water vapour, achieving a better efficiency than that achieved in the prior state of the art, besides the liquefaction of the nitrogen at pressure substantially less than what is necessary for the air from which the nitrogen is extracted first and the oxygen afterwards. The operating fluid of the reservoir(s) is pumped by the feed pump B which is preheated in going through the heat exchanger 3 which achieves the recovery of the heat contained in the superheated steam emerging from the turbine at B.P. Then the heating by diathermal oil in the accumulator 6 with an external circuit 4-5, in order to furnish heat to the operating fluid for the following phases of thermodynamic transformation: saturated steam C-D; superheated steam D- F; resuperheated steam G-K. The heat generator, likewise using diathermal oil, being independent of the cycle, allows the use of any given type of fuel. The proper functioning of the turbine F9, K9 is ensured by the bypass valves for the recycling of the live steam at the required temperatures and pressures. The condensation is achieved by surrendering the residual heat to the subsoil of the ground by means of drilled wells 2, 2'. The same cycle can also be combined with the turbogas cycle, achieving an extremely advantageous industrial result. <IMAGE>