摘要:
A control method of a centrifugal compressor (C) mechanically coupled to an expansion turbine (TorC), the centrifugal compressor (C) being provided with at least a control system (20) of the absorbed power. The control method of the rotation speed of the turbine-centrifugal compressor group performs the following steps: —acting on the centrifugal compressor control system (20) of the absorbed power by means of a first controller (PID-f), in order to keep constant the rotational speed of the compressor mechanically coupled to the expansion turbine; —ensuring that the centrifugal compressor (C) remains in a stable operating condition by means of an admission valve (Vi) of the expansion turbine (TorC).
摘要:
The invention relates to an ORC (Organic Rankine Cycle) for the conversion of thermal energy into electric energy, comprising at least one heat exchanger unit for re-superheating the working fluid by means of the thermovector fluid from the hot source, between the discharge of the first expander and the input of the second expander, and a regenerator unit including a first regenerator and at least one second regenerator for regenerating the working fluid in at least two successive stages, in said first regenerator and at least in said second regenerator respectively, with an additional regenerative heat exchange along the flow line connecting the liquid working fluid output of the second regenerator to the liquid working fluid input of the first regenerator.
摘要:
The invention concerns an ORC plant (Organic Rankine Cycle) for a conversion of thermal energy into electric energy, that comprises a heat exchange group for the exchange of heat between the thermal carrier fluid and a working fluid destined to feed at least one expander connected to an electric generator. The heat exchanger group comprises in succession at least one primary heater and a primary evaporator respectively for preheating and evaporation of the working fluid. According to the invention, on the side of the heat Exchange group, downstream of the primary heater, are present at least an auxiliary evaporator to evaporate a part of the working fluid by means of a heat exchanger with the fluid source coming from the output of said primary evaporator, a device for diverting said part of the working fluid flow from the outlet of said primary preheater towards the auxiliary evaporator, and a compressor designed to receive the working fluid from the auxiliary evaporator and to increase the pressure up to a level corresponding to a preset pressure level for the induction of the work fluid into the expander.
摘要:
The invention concerns an ORC plant (Organic Rankine Cycle) for a conversion of thermal energy into electric energy, that comprises a heat exchange group for the exchange of heat between the thermal carrier fluid and a working fluid destined to feed at least one expander connected to an electric generator. The heat exchanger group comprises in succession at least one primary heater and a primary evaporator respectively for preheating and evaporation of the working fluid. According to the invention, on the side of the heat Exchange group, downstream of the primary heater, are present at least an auxiliary evaporator to evaporate a part of the working fluid by means of a heat exchanger with the fluid source coming from the output of said primary evaporator, a device for diverting said part of the working fluid flow from the outlet of said primary preheater towards the auxiliary evaporator, and a compressor designed to receive the working fluid from the auxiliary evaporator and to increase the pressure up to a level corresponding to a preset pressure level for the induction of the work fluid into the expander.
摘要:
The invention concerns a turbine structure for the expansion of gas and vapour, comprising a body or casing with a peripheral work fluid transit volute from an entrance to an exit passage, at least a first stator and possible subsequent stators, a turbine shaft rotating around an axis and carrying at least a first rotor and possible subsequent rotors working together downstream of the first stator and subsequent rotors, respectively, an external tube member jutting out frontally from said body or casing and coaxial to the rotating turbine shaft, and where between the tube member (18) and the turbine shaft (15) is positioned a supporting unit (19) extractable en bloc from said external tube (18) except for the shaft.
摘要:
The invention concerns a turbine for the expansion of gas and vapor, comprising a body or case, a fixed external sleeve member, overhanging frontally from a frontal wall of said case, and a turbine shaft (15) extending coaxially and rotating in said external sleeve member (18) with the interposition of a supporting unit (19). The external sleeve member has a head flange to axially hold said supporting unit; the turbine shaft ends with a joint to connect it to a device to be operated. The supporting unit (19) includes ball bearings to support the turbine shaft (15) in said external sleeve member (18), and between said external sleeve member (18) and a contiguous end of said turbine shaft (15) an aggregate (50) is provided to generate an adjustable axial force so as to compensate the axial thrust of the turbine shaft to limit the application of improper axial loads on the ball bearings.
摘要:
The invention regards a turbine for the expansion of gas and vapor that comprises a body or casing with a volute for the transit of the fluid from an input to an output passage through at least a statoric and a rotoric group, a possible front shield that extends radially from said volute towards the axis of the turbine shaft, an external tube member fixed in front of said shield or said volute designed to hold the turbine shaft with the interposition of a supporting unit (19), where said turbine shaft (15) has a head (15′) supporting the rotoric group (16, 17). The turbine shaft (15) together with the rotoric group (16, 17) is movable axially between a work position, in which the head of said shaft is at a distance from an internal end of the external tube member (18) facing towards the statoric group, and a retracted position, in which the head of the shaft or a part of the rotoric group rests against said internal end of said tube member with the interposition of at least a front seal (41).
摘要:
The invention is directed to an ORC (Organic Rankine Cycle) system at least partially co-generative for the production of electric energy and the heating of a fluid. The system includes at least two regenerative exchangers positioned in series on the route of the work fluid between the exit of an electric expander-generator group and the entrance of a condenser of the ORC system, and a heat exchanger-user connected by means of an offtake line to at least one of said regenerative exchangers to receive from them a part of the capacity of work fluid and crossed by the user fluid to be heated by means of a thermal exchange with said capacity of work fluid. A part of the capacity of the work fluid on exiting from the user exchanger is returned to the same regenerative exchanger.
摘要:
The invention regards a turbine for the expansion of gas and vapour that comprises a body or casing with a volute for the transit of the fluid from an input to an output passage through at least a statoric and a rotoric group, a possible front shield that extends radially from said volute towards the axis of the turbine shaft, an external tube member fixed in front of said shield or said volute designed to hold the turbine shaft with the interposition of a supporting unit (19), where said turbine shaft (15) has a head (15′) supporting the rotoric group (16, 17). The turbine shaft (15) together with the rotoric group (16, 17) is movable axially between a work position, in which the head of said shaft is at a distance from an internal end of the external tube member (18) facing towards the statoric group, and a retracted position, in which the head of the shaft or a part of the rotoric group rests against said internal end of said tube member with the interposition of at least a front seal (41).
摘要:
The invention concerns a turbine structure for the expansion of gas and vapour, comprising a body or casing with a peripheral work fluid transit volute from an entrance to an exit passage, at least a first stator and possible subsequent stators, a turbine shaft rotating around an axis and carrying at least a first rotor and possible subsequent rotors working together downstream of the first stator and subsequent rotors, respectively, an external tube member jutting out frontally from said body or casing and coaxial to the rotating turbine shaft, and where between the tube member (18) and the turbine shaft (15) is positioned a supporting unit (19) extractable en bloc from said external tube (18) except for the shaft.