FR2467989A1 - DEVICE FOR RECOVERING RESIDUAL ENERGY IN INDUSTRIAL PLANTS - Google Patents

Abstract

The invention makes it possible to use the energy recovered with time delay, independently of the current conditions of the energy source to be considered. To this end, there is interposed between the turbine T and the compressor X of a turbocharger supplied by the exhaust gases A of the internal combustion engine B, a rotary flywheel S rotating freely in its bearings and connected on the one hand to the turbine and the other to the compressor by clutches K1 and K2. This device is particularly advantageous on board vehicles providing local traffic.

Description

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  The subject of the invention is a device for recovering residual energies in industrial installations, in particular in the case of the energy contained in the gases

  exhaust of internal combustion engines.

  Energy consumption plays a vital role in

all areas of technology.

  The trend to reduce as much as possible the consumption of

  energy is at the forefront, but the recovery of surplus or residual energy occurring during

  what process or technical treatment, for example in the

  heat lost in the facilities supplied

power and the like.

  The use of hot engine exhaust

  internal combustion has achieved great importance in practicing

  than. It is known, in particular, that a turbine can be rotated with hot exhaust gases, this turbine in turn operating a compressor that can be used to supercharging the engine itself, thereby increasing the

power of the latter.

  Such turbochargers are however effective

  only when the residual energy contained in the exhaust gases

  is sufficiently strong, that is to say when the engine

turns on a high diet.

  It must be considered as a disadvantage that,

  for the lower range of rotation speeds, and in particular

  During the start-up period, it is not possible to

  the turbocharger.

  German Patent Application Publication No. 2,808,147 discloses a device that addresses the problem thus posed.

  To sufficiently introduce the air of

  jection and compressed air in an internal combustion engine, even when the energy recovered from the exhaust turbine is no longer sufficient for the task alone, it has been associated with

  in the case of this application the gas turbocharger will

  to an electric motor which thus supplies the compressor

the missing energy.

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  It is true that we can thus achieve an improvement

  the energy balance of the engine, but this requires

  electric motor flow supply of energy

  external, for example that of a battery.

  German Patent Application 1,451,916 discloses another method of transforming energy.

  kinetics of a moving body in usable energy.

  This publication is based on the use of energy

  kinetics of a moving body, such as a vehicle during braking or stopping, for the compression of a

  fluid agent in a pressure vessel.

  This agent thus stored in the container under pres-

  sion can then be used to maintain the rotation of the vehicle engine for a short time,

  This process allows, it is true to introduce into the

  a pre-compressed air load, but it involves the significant expense of a compressor, a

  pressure, pipes and sealing means.

  In this case, no recovery of

  the residual energy contained in the exhaust gas.

  Another common mode of energy recovery is the regenerative braking used for current generation; at the moment of braking the kinetic energy of the vehicle is applied to the production of electrical energy, energy which

  is returned to the network or served in any other way.

  In this case again, the energy recovered depends on the momentary speed or the number of revolutions of the motor. Therefore, the invention aims at forming a device recovering the residual energy of the industrial installations and more particularly the energy of the gases. exhaust of internal combustion engines and this by making possible not only the recovery for high ranges of rotational speeds, but also the use of residual energy

  recovered at other times and if necessary with temporisa-

tion.

  The invention solves this problem by providing a steering wheel

  rotary gear that is mounted as a result of the engine so as to

  shop for energy and that can be connected to

  a machine that we want to operate when needed.

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  The principle of the invention can include many

  applications and various assemblies, and this according to the mode of

  rotating the flywheel and also according to the subsequent use provided for the energy of the rotary wheel, the latter, driven for example by a turbine driven by the exhaust gas of an internal combustion engine, stores energy and this energy stored by the rotary wheel can, if necessary, be supplied to a machine of any desired type, for example to a compressor

  Unlike exhaust gas turbochargers

  of the known type recalled above, it is possible to take in the case of the invention the energy of the rotating flywheel even at the stop of the motor vehicle or while the engine is running at low speed, so as to obtain an increase power

  through the supercharger

  motor when starting or accelerating.

  The essence of the invention consists in the intermediate storage of the residual energy available in a rotary wheel. There is therefore a significant advantage compared with storing this energy in a container

  under pressure, this advantage being that the said energy

  stored in the rotating flywheel, instead of serving to drive the supercharging air compressor can be used as otherwise, if necessary, in that it can be mounted after the rotary wheel an electric generator whose energy can be applied, for example to

  starting or accelerating a motor vehicle.

  It is also possible to use the energy of the rotary wheel for mechanical control of a starter or similar device.

  In the case of vehicles with electronic braking

  recovery, as recalled above, the electrical energy

  This recovered braking can be applied to an electric motor driving the rotating flywheel. In all the cases considered, the introduction of a rotating flywheel with storage of the kinetic energy of the latter for later use of this energy, has for

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  result of the advantages due to the fact that storage makes it pos-

  a subsequent removal of that energy, whatever

  the operating conditions are quite different.

  the installation to consider.

  Hereinafter, a more detailed form has been described.

  of the invention given by way of example with reference to

  in the drawings below: FIG. 1 schematically represents a mode of storing residual energies in a rotating flywheel

  driven by an exhaust gas turbine.

  - fig. 2 represents an embodiment comprising a

  electric control of the rotary wheel.

  It has been supposed in fig. 1 that the main installation consists of an internal combustion engine B.

  The exhaust gases A of this engine B are directed

  tell me the arrow to the exhaust gas turbine T

  from where they are evacuated into the atmosphere.

  The exhaust gas turbine T drives to estour by means not shown, either directly or via gearing the rotary wheel S. Thanks to the presence of bearings on either side of the steering wheel S and clutches K1 and K2 on the driving side and on the driven side of the steering wheel, it becomes possible to let the rotary wheel turn when it has stored energy, and this

  independently of any training by the installation

  the engine B. The residual energy contained in the exhaust gas A is thus stored in the rotating wheel, even after

  reduction of the speed of rotation of the motor of the

  main output B after stopping the machine when there is no more drive by the turbine T. On the output side of the rotary wheel S is mounted, beyond the clutch K2, a working machine X unspecified nature, for example a

air compressor.

  The use of a rotary wheel S as accumulator

  energy makes it possible to extract the energy thus

  shopped for the purpose of any application to a particular

  and regardless of the momentary conditions of the main installation and the operation of the turbine at

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moment considered.

  The energy taken from the rotating flywheel can be used to operate a supercharger such as

  o the known exhaust turbochargers do not necessarily

  Only a small increase in the power of the main machine can be obtained in the form of

  starting or accelerating a vehicle.

  The concept of residual energy should not apply

  only in a strict manner to the exhaust gases of

  internal combustion engines, but can be extended in a general way to all industrial installations and it is thus possible to transfer during their operation a fraction of

  their unused kinetic energy to a rotary wheel

  S emulator. According to the embodiment of FIG. 2 we start again with a vehicle F including a recovery electric brake N.

  The electrical energy produced by the braking of

  tion is transmitted by the driver 3, if necessary by a switch, to the electric motor M which thus drives the rotary wheel S. At the output of this rotary wheel, it is provided in the case given by way of example, a electric generator E whose energy is transmitted by the driver 4 to the work machines that can be coupled to this generator, Another possibility of use is figure by the driver 5 which allows to directly cooperate the electrical energy produced by the generator E to drive the vehicle F at the time of starting or acceleration,

  In any case, it is possible to transmit

  mentally large quantities of energy from the rotating wheel to the use machines mounted thereafter, retaining the advantage of storage

  temporary residual energy.

  A particularly interesting field of application

  is that of local traffic by train or bus.

  During frequent braking, stopping, starting and accelerating of this traffic, intermediate storage

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  temporary with reuse of residual energy brings

notable benefits.

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Claims (6)

  1. Apparatus for recovering residual energies in industrial installations, for example residual energy contained in the exhaust gases of internal combustion engines, this device being characterized by a rotating flywheel coupled following the installation and which can be connected to work machines mounted according to the needs output of the rotating steering wheel.   2. Device according to claim 1, characterized in that the rotary wheel is driven by a turbine exhaust gas.   3. Device according to claim 1, applied to a vehicle comprising an electric regenerative brake, characterized by an electric motor powered by the electric gear developed by braking and driving the rotary wheel.   4. Device according to any one of the claims   1 to 3, characterized in that the working machine uses   reading the recovered energy is a compressor used to   supercharging of an internal combustion engine.   5. Device according to any one of the claims   1 to 3, characterized by the fact that the working machine   using the recovered energy is an electric generator.   6. Device according to any one of the claims   previous arrangements, characterized by clutches or   canisms susceptible to freeing mounted on at least one   sides, input or output, of the rotary wheel.