Process for the rotational driving of a turbine by means of an ejector device
OwnerMichele Martinezinventor
Life of this patent
Estimating the term…
Abstract
The method enables a turbine to be used at varying speeds and powers. An injector (15) is placed in a channel (3) downstream from a turbine (4); it creates a Venturi effect and converts pressure control into control of the mass flow rate of a mixed fluid. Sensors (18) and a regulator (17) enable the speed of the turbine (4) to be matched to a reference speed. A variant consists in placing a suction generator at the outlet of the section (5) of the channel (3).
Claims18
A method of driving a turbine in rotation, said turbine being connected to an upstream fluid feed channel and to a downstream ejection channel, said method comprising the steps of:
- admitting a primary fluid into said upstream fluid feed channel, said upstream channel converging from upstream to downstream for generating a flow of said primary fluid at a mass flow rate Dp, and said primary fluid having, in a downstream portion of said upstream channel, a pressure Pp which is lower than the pressure Pa of an external ambient medium, a speed Vp, and a flow which is substantially without disturbances;
- driving said turbine in rotation by passing said primary fluid over the blades of said turbine;
- injecting a secondary fluid into said downstream channel, said secondary fluid having a pressure Ps greater than said pressure Pa, a speed Vs greater than said speed Vp, and a flow rate Ds less than said mass flow rate Dp of said primary fluid;
- mixing said primary and secondary fluids in said downstream channel to obtain a homogeneous mixture in said downstream channel having a mass flow rate substantially equal to the sum of said mass flow rates Dp and Ds of said primary and secondary fluids;
- and
- ejecting said mixture at the outlet of said downstream channel into said ambient medium via an outlet section of said downstream channel.
A turbine device comprising:
- a body containing a turbine, an upstream channel for feeding fluid to the turbine, and a downstream channel for ejecting fluid;
- injection means for injecting a secondary fluid into said downstream channel, said secondary fluid having a pressure Ps, a speed Vs, and a mass flow rate Ds;
- and
- admission means for admitting a primary fluid into said upstream channel;
- said upstream channel having an inlet section for admitting said primary fluid at a mass flow rate Dp, a speed Vp, and a pressure Pp that is lower than a pressure Pa of an external ambient medium, wherein said pressure Ps is much greater than said pressure Pp and said speed Vs is much greater than said speed Vp;
- said injection means being adapted to deliver said secondary fluid at said pressure Ps and at said speed Vs, and being configured to enable a uniform mixture to be obtained inside said downstream channel, said mixture having a mass flow rate substantially equal to the sum of the mass flow rates Dp and Ds;
- and
- said downstream channel having an outlet section for ejecting said mixture into said external ambient medium.
A method of driving a turbine in rotation, said turbine being connected to an upstream fluid feed channel and a downstream ejection channel, said method comprising the steps of:
- admitting a fluid into said upstream fluid feed channel, said upstream channel converging from upstream to downstream for generating a flow of said fluid at a mass flow rate Dp, and said fluid having in a downstream portion of said upstream channel a pressure Pp which is lower than the pressure Pa of an external ambient medium, a speed Vp, and a flow which is substantially without disturbances;
- driving said turbine in rotation by passing said fluid over the blades of said turbine;
- and
- ejecting said fluid at the outlet of said downstream channel at a pressure Pej less than said pressure Pa of said external ambient medium, said pressure Pej being applied to an outlet section of said downstream channel.
A turbine device comprising a body containing a turbine, an upstream channel for feeding fluid to the turbine, a downstream channel for ejecting fluid, and means for admitting a fluid into said upstream channel, wherein:
- said upstream fluid feed channel has an inlet section for admitting said fluid at a mass flow rate Dp, a speed Vp, and a pressure Pp that is less than a pressure Pa of an external ambient medium;
- and
- said downstream channel has an outlet section for ejecting said fluid at a pressure Pej lower than said pressure Pa of said external ambient medium, said pressure Pej being applied to said outlet section by a suction generator.
Dependencies are inferred from the claim text.