Plant for the production of energy based upon the organic rankine cycle

Abstract

A plant for the production of energy that is based upon the organic Rankine cycle (ORC). The plant comprises a first ORC system, comprising a first organic operating fluid circulating, in sequence, between a first evaporator in conditions of heat exchange with a heat source, a first expansion stage in a turbine operatively connected to a generator, a first evaporator / condenser, and a first pump for recirculating said first organic operating fluid to said first evaporator. Said turbine is a partializable turbine and comprises means for partializing the incoming flowrate of said organic operating fluids, said means being designed to partialize said incoming flowrate to keep the r.p.m. of said turbine constant.

Description

technical field [0001] The present invention relates to energy production plants based on the Organic Rankine Cycle (ORC), in particular, energy production plants comprising a plurality of cascaded ORC systems using specific turbines. Background technique [0002] As known, an ORC plant is a system generally used for the simultaneous production of electrical energy and thermal energy, which can be obtained in the form of water at a temperature of 60-90°C. The Organic Rankine cycle is similar to the cycle used by conventional steam turbines, except that the working fluid is typically an organic fluid with a high molecular weight. [0003] A typical ORC plant basically consists of a pump, a turbine and some heat exchangers. The organic working fluid is evaporated in the evaporator by using a heat source. Vapors of the organic fluid are expanded in a turbine and then condensed, usually using water flow in a heat exchanger. The condensed liquid is eventually pumped back into ...

AI Technical Summary

Problems solved by technology

[0007] Therefore, it is evident that the application of ORC systems is very limited and is limited by the stability from the heat source available as the primary energy source, from the temperature level or levels (quality of the heat source) and the heat load and / or the relative Constraints on Important Aspects of Variability

[0008] Furthermore, it is evident that current ORC systems are not flexible and adaptable to different operating conditions, considering that, as mentioned earlier, the choice of organic working fluid and turbine properties is clearly dependent on operating conditions

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