EP4350129A1 - System zur energieerzeugung mit einem organischen rankine-zyklus und integriertem absorptionszyklus - Google Patents

System zur energieerzeugung mit einem organischen rankine-zyklus und integriertem absorptionszyklus Download PDF

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Publication number
EP4350129A1
EP4350129A1 EP23201246.8A EP23201246A EP4350129A1 EP 4350129 A1 EP4350129 A1 EP 4350129A1 EP 23201246 A EP23201246 A EP 23201246A EP 4350129 A1 EP4350129 A1 EP 4350129A1
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EP
European Patent Office
Prior art keywords
cycle
condenser
evaporator
absorption
orc
Prior art date
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Pending
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EP23201246.8A
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English (en)
French (fr)
Inventor
Hai Trieu Phan
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication of EP4350129A1 publication Critical patent/EP4350129A1/de
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
    • F25B17/02—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a liquid, e.g. brine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/04—Heat pumps of the sorption type

Definitions

  • the present invention relates to an energy production system combining an organic Rankine cycle and an absorption cycle.
  • the invention will more particularly find its application with the objective of energy recovery and optimization of the electrical production yields of an ORC cycle.
  • thermodynamic cycles Systems for producing electricity by thermodynamic cycles are widely known.
  • organic Rankine cycles which exploit a heat source, commonly a heat source with a temperature between 90°C and 200°C.
  • an energy production system comprising: -an organic Rankine cycle (ORC) comprising a first circulation loop of a first working fluid comprising a preheating device, a first evaporator, an expander, a first condenser and a first pump, - an absorption cycle comprising a second circulation loop of a working solution comprising an absorber, a generator, a second condenser, a second pump and a second evaporator, characterized in that the system comprises an intermediate circuit capable of receiving an intermediate fluid and ensuring the thermal connection of the ORC cycle and the absorption cycle and on which the second condenser and/or absorber and preheating device.
  • ORC organic Rankine cycle
  • the intermediate circuit makes it possible to recover the heat rejection at the outlet of the absorber and condenser components of the absorption cycle to preheat the first working fluid of the ORC cycle, this also ensures satisfactory cooling of the absorber and condenser components of the absorption cycle whatever the climatic conditions to allow operation in the best performance conditions.
  • the invention relates to a method of producing energy by a system as described above comprising: - the production of electrical energy by the ORC cycle expander, - heat rejection by the absorber and the second condenser of the absorption cycle, characterized in that the heat rejected by the absorber and/or the second condenser of the absorption cycle is transmitted to the preheating device of the ORC cycle via the intermediate circuit.
  • the process thus makes it possible to use heat rejects from the absorption machine to power the ORC cycle.
  • FIG. 1 represents the architecture of the energy production system according to one embodiment of the invention.
  • the process thus allows optimized integration of the absorption cycle in which the condensation of the first working fluid in the first condenser is optimized by the use of the cold produced by the absorption cycle.
  • This arrangement is particularly useful for ensuring correct condensation in the first condenser, all the more so when the climatic conditions, in summer, do not provide a sufficiently low ambient air temperature.
  • the upstream and downstream, the inlet, the outlet, at a given point are taken with reference to the direction of circulation of the fluid.
  • fluidically connected or “in fluidic connection” is understood to mean when a line provides a connection through or in which a fluid circulates.
  • a fluidically connected to B or “A fluidically connected to B” is synonymous with "A is in fluidic connection with B” and does not necessarily mean that there is no organ between A and B
  • these expressions mean a fluid connection between two elements, this connection which may or may not be direct. This means that it is possible that between a first element and a second element which are fluidically connected, a path of a fluid exists through one or more conduits, possibly an additional organ.
  • directly fluidly connected means a direct fluidic connection between two elements. This means that between a first element and a second element which are fluidically directly connected no other element is present, other than a conduit or several conduits.
  • A is thermally connected to B” or “A is in thermal connection with B” we mean that thermal energy circulates between A and B with no fluidic connection.
  • hot, cold, cooled, reheated we mean a relative temperature compared to another point in the system.
  • a parameter “substantially equal/greater/less than” or “of the order of” a given value is meant that this parameter is equal/greater/less than the given value, to within plus or minus 10%, or even to plus or minus 5% of this value.
  • the system according to the invention comprises an organic Rankine cycle 100 and an absorption cycle 200.
  • the system includes an organic Rankine Cycle 100 (Organic Rankine Cycle, ORC) also hereinafter referred to as Rankine Cycle 100, which makes it possible in particular to produce mechanical power from a hot source at low or medium temperature.
  • ORC Organic Rankine Cycle
  • the Rankine 100 cycle makes it possible to recover thermal energy by transforming thermal energy into mechanical energy.
  • thermal energy comes from the processing industry (metallurgy, chemistry, papermaking, etc.) with low-temperature thermal discharges, from transport with a thermal engine in which we have heat needs: automobile, boat, or concentrated solar power, or biomass or geothermal energy.
  • the Rankine cycle 100 comprises an expander 105 and a first pump 107 arranged in series with a first evaporator 104 and a first condenser 106 and advantageously according to the invention a preheating device.
  • the Rankine cycle 100 includes a first circulation loop 101 intended to receive a working fluid.
  • the first circulation loop 101 ensures the fluid connection of the constituents of the Rankine cycle 100 so that the working fluid passes through them preferentially successively in the order if after, the preheating device, more precisely the first preheating exchanger 102 then the second preheating exchanger 103, the first evaporator 104, the expander 105, the first condenser 106 and the first pump 107, then again the preheating device.
  • the circulation loop 101 is advantageously a closed circuit.
  • the Rankine cycle 100 advantageously comprises a working fluid.
  • the working fluid may be a pure fluid.
  • the working fluid is a mixture of fluids, at least two fluids, or even more.
  • the working fluid is preferably organic.
  • the working fluid is for example the R1233 zd fluid.
  • the Rankine cycle 100 comprises a preheating device.
  • the preheating device comprises at least a first preheating exchanger 102.
  • the preheating device comprises a second preheating exchanger 103.
  • the first preheating exchanger 102 and possibly the second preheating exchanger 103 are heat exchangers arranged on the first circulation loop 101 of the Rankine cycle 100.
  • the preheating device is configured to heat the working fluid up to the vaporization temperature, that is to say in other words up to the appearance of the first steam bubble.
  • the working fluid enters the preheating device in the compressed liquid state and leaves at the start of the two-phase state (liquid-vapor).
  • the preheating device is fluidly connected to the first pump 107 and to the first evaporator 104.
  • the first circulation loop 101 comprises a fluid connection D arranged between the first pump 107 and the first heat exchanger 102 and allowing entry of the working fluid in the first preheating exchanger 102, preferably directly, from the outlet of the first pump 107.
  • the first circulation loop 101 comprises a fluid connection E arranged between the first preheating exchanger 102 and the second preheating exchanger 103 and allowing the entry of the working fluid into the second preheating exchanger 103, preferably directly, from the outlet of the first preheating exchanger 102.
  • the first circulation loop 101 comprises a fluid connection F arranged between the second preheating exchanger 103 and the first evaporator 104 and allowing the outlet of the working fluid outside the preheating device, preferably directly, towards the first evaporator 104.
  • the preheating device comprises only the first preheating exchanger 102, it is this which is in fluidic connection with the first evaporator 104 to ensure, preferably directly , the entry of the working fluid into the first evaporator 104, from the outlet of the preheating device.
  • the first preheating exchanger 102 is thermally coupled to the intermediate circuit 300 acting as a heat source.
  • the second preheating exchanger 103 it is thermally coupled to a heat source.
  • the heat source is preferably the first heat source 400 which may have already passed through the first evaporator 104.
  • the Rankine cycle also includes a first evaporator 104.
  • the first evaporator 104 is a heat exchanger arranged on the first circulation loop 101 of Rankine cycle 100.
  • the first evaporator 104 is configured to completely evaporate the working fluid.
  • the working fluid comes out slightly overheated so as not to send droplets of liquid to the expander 105.
  • the first evaporator 104 is thermally coupled to a heat source 400.
  • the first evaporator 104 includes an inlet and a heat source outlet 400 allowing the heat input necessary for the overheating of the working fluid.
  • the temperature of the heat source 400 is less than 200°C.
  • the first evaporator 104 is fluidly connected to the preheating device and to the expander 105.
  • the first circulation loop 101 comprises a fluidic connection F arranged between the preheating device, more precisely the second preheating exchanger 103, and the first evaporator 104 allowing the entry of the working fluid into the first evaporator 104, preferably directly, from the preheating device, more precisely from the outlet of the second preheating exchanger 103.
  • the first circulation loop 101 comprises a fluid connection A arranged between the first evaporator 104 and the expander 105 allowing the entry of the working fluid into the expander 105, preferably directly, from the outlet of the first evaporator 104.
  • the inlet of the first evaporator 104 is fluidly connected to the outlet of the preheating device and the outlet of the first evaporator 104 is fluidly connected to the inlet of the expander 105.
  • the Rankine cycle also includes an expander 105 such as for example a volumetric expansion machine or a turbine.
  • This expander 105 allows the working fluid to be relaxed and mechanical energy to be produced from this relaxation.
  • the working fluid enters the expander 105 as high pressure compressed vapor and exits the expander 105 as low pressure expanded vapor.
  • this energy is recovered on a rotating shaft.
  • This mechanical energy can then be recovered in electrical form at the level of an alternator located on said rotating shaft or a compressor or a pump allowing the use of mechanical energy directly.
  • the expander 105 is for example derived from a conventional volumetric expansion machine from the refrigeration industry; other turbomachines or specific volumetric machines will be more efficient.
  • the expander 103 is fluidly connected to the first evaporator 104 and the first condenser 106.
  • the first circulation loop 101 comprises a fluid connection B arranged between the expander 105 and the first condenser 106, allowing the entry of the working fluid into the first condenser 106, preferably directly, from the outlet of the expander 105.
  • the inlet of the expander 105 is fluidly connected to the outlet of the first evaporator 104 and the outlet of the expander 105 is fluidly connected to the entry of the first condenser 106.
  • the Rankine cycle 100 also includes a first condenser 106.
  • the first condenser 106 is a heat exchanger arranged on the first circulation loop 101 of the Rankine cycle 100.
  • the first condenser 106 is configured to cool the working fluid.
  • the working fluid enters the condenser 106 in the state of low pressure expanded vapor and leaves in the liquid state, preferably subcooled to avoid the risk of cavitation in the pump.
  • the first condenser 106 is thermally coupled to a cold source 501 making it possible to cool the working fluid to condense it, or even sub-cool it. During this cooling, the dew point temperature is reached. Cooling is therefore accompanied by the phenomenon of condensation.
  • the cold source 501 advantageously comes from the absorption cycle described below. The cold source 501 brings the cold produced by the evaporator of the absorption cycle to the first condenser 106 of the Rankin cycle e100.
  • the first condenser 106 is fluidly connected to the expander 105 and to the first pump 107.
  • the first circulation loop 101 comprises a fluid connection C arranged between the first condenser 106 and the first pump 107 allowing the entry of the fluid from work in the first pump 107, preferably directly, from the outlet of the first condenser 106.
  • the inlet of the condenser 106 is fluidly connected to the outlet of the expander 105 and the outlet of the first condenser 106 is fluidly connected to the entry of the first pump 107.
  • the Rankine cycle 100 also includes a first pump 107. Preferably, it allows the working fluid to be compressed.
  • the working fluid enters the first pump 107 in the liquid state and exits in the high pressure compressed liquid state.
  • the first pump 107 requires a supply of energy, conventionally in the form of electricity to set the working fluid in motion.
  • the first pump 107 is fluidly connected to the first condenser 106 and to the preheating device, more preferably to the first preheating exchanger 102.
  • the first circulation loop 101 comprises a fluidic connection D arranged between the first pump 107 and the preheating device and more precisely with the first preheating exchanger 102 allowing the entry of the working fluid into the preheating device, preferably directly, from the outlet of the first pump 107.
  • the inlet of the first pump 107 is fluidly connected to the outlet of the first condenser 106 and the outlet of the first pump 107 is fluidly connected to the inlet of the preheating device, more precisely the inlet of the first preheating exchanger 102.
  • the first heat source 400 enters the first evaporator 104 to provide energy ensuring the vaporization of the working fluid.
  • the first heat source 400 forms at least partially and preferably completely the heat source supplying the second preheating exchanger 103.
  • the heat source 400 enters the first evaporator 104 at a temperature of the order of 200°C and leaves the second preheating exchanger 103 at a temperature of around 90°C.
  • the system according to the invention also comprises an absorption cycle 200.
  • An absorption cycle uses refrigerant/sorbent pairs with strong affinities to replace the vapor compression of traditional heat pump type machines.
  • This solution has low electrical consumption, the main energy coming from the thermal source, making it possible to limit the operating cost in the case of the valorization of a low-cost energy source such as gas for example or free (such as solar energy or heat rejection for example).
  • the absorption cycle works thanks to a working solution.
  • This type of absorption cycle works thanks to the ability of certain liquids to absorb (exothermic reaction) and desorb (endothermic reaction) a vapor. It also uses the fact that the solubility of this vapor in the liquid depends on temperature and pressure.
  • an absorption cycle uses as a working solution comprising a binary mixture, one of the components of which is more volatile than the other, and constitutes the refrigerant.
  • the H 2 O/LiBr couple can optionally also be used.
  • An absorption cycle 200 comprises four main exchangers (generator 203, absorber 202, condenser 204 and evaporator 205), and advantageously from one to three secondary exchangers.
  • the role of the three secondary exchangers is to improve the performance of the cycle such as: a rectifier, an economizer, a subcooler.
  • the absorption cycle comprises at least one regulator 206, and at least one solution loop comprising a solution pump 208 and an expansion valve 207.
  • This type of cycle operates according to three temperature levels: a temperature level low corresponding to the production of cold at the evaporator 205, an intermediate temperature level corresponding to the condensation temperature of the refrigerant, but also to that of absorption of the refrigerant by the absorbent and a high temperature level corresponding to the driving temperature of generator 203.
  • the absorption cycle 200 comprises a second circulation loop of 201 configured to ensure the fluidic connection of the different components of the cycle to absorption.
  • the second circulation loop 201 is a closed circuit intended to receive the working solution.
  • An absorption cycle operates partly at high pressure between the pump 208 upstream of the generator 203 and the expander 206, downstream of the condenser 204, and partly at low pressure between the expander 206, downstream of the condenser 204 and the pump 208 upstream of the generator 203.
  • thermodynamic cycle is feasible due to the vapor pressure difference between the absorbent and the refrigerant which is variable depending on the temperature and pressure. This variability allows for a difference in concentration between the poor solution and the rich solution described below.
  • the advantage of this absorption cycle is that mechanical compression is replaced by thermochemical compression which uses heat, that is to say a degraded primary energy source. The only primary energy input required is at the solution pump 208, but its work is approximately 96 times less than the work that the steam compressor must provide for similar operating conditions.
  • the absorption cycle comprises a refrigerant/absorbent working solution comprising, according to one possibility, the Ammonia/Water couple (NH3/H2O).
  • the concentrations of the working solution and the absorbent in the working solution are adapted to the pressure and temperature of the air treatment and lower than the crystallization concentration of the solution.
  • the working solution comprises ionic liquids.
  • This NH3/H2O couple can be used for air conditioning applications, but also refrigeration and there is no crystallization possible over the pressure and temperature operating ranges.
  • the vapor pressure difference between the absorbent and the refrigerant is small. There are therefore traces of water carried with the ammonia vapor at the outlet of generator 203, sometimes requiring the presence of a rectifier.
  • the working solution is called rich, because the concentration of refrigerant is greater than in the so-called lean working solution.
  • the generator 203 is fluidly connected to the second condenser 204 by a fluid connection G allowing the refrigerant vapor to exit from the generator 203 towards the second condenser 204.
  • the generator 203 also includes an inlet and a second source outlet heat 405 allowing the heat supply necessary for the vaporization of the refrigerant.
  • the absorption cycle 200 can include a rectifier placed between the generator 203 and the condenser 204, more precisely on the fluid connection G.
  • the rectifier makes it possible to remove by condensation the traces of water carried with the fluid of the device.
  • the second condenser 204 also includes a cooling source.
  • the phase change of the refrigerant from the vapor state to the liquid state is accompanied by a release of heat.
  • the cooling source of the condenser 204 is formed by the intermediate fluid of the intermediate circuit 300. The release of heat produced by the condenser 204 is transmitted to the intermediate fluid circulating in the intermediate circuit 300.
  • the absorption cycle can comprise a sub-cooler arranged between the condenser 204 and the evaporator 205, and between the evaporator 205 and the absorber 202, more precisely on the fluidic connection H and on a fluidic connection I at the outlet of the evaporator.
  • the subcooler makes it possible to subcool the refrigerant at the inlet of the evaporator 205 and to preheat the refrigerant to the vapor state at the outlet of the evaporator 205.
  • This exchanger therefore makes it possible to reduce the size of the condenser 204 and the evaporator 205 and thus significantly improve the performance of the machine. The relevance of this component depends on the operating temperatures, the size of the machine and the cost of the exchangers.
  • the system comprises an intermediate circuit 300 capable of receiving an intermediate fluid.
  • the intermediate circuit 300 is a fluid circulation loop preferably in a closed circuit.
  • the intermediate circuit 300 is configured to ensure the thermal connection between the ORC cycle 100 and the absorption cycle 200.
  • the intermediate circuit 300 is intended to supply the ORC cycle 100 with heat rejected by the absorption cycle 200.
  • the heat rejected by the absorption cycle 200 by the absorber 202 and/or the condenser 204 is transmitted to the ORC cycle 100 by the intermediate circuit 300.
  • the heat is advantageously transmitted to the preheating device of the ORC cycle 100 and in particular to the first preheating exchanger 102.
  • the intermediate circuit 300 ensures the fluid circulation of the intermediate fluid successively in the absorber 202 and/or the condenser 204 and in the preheating device, more precisely in the first preheating exchanger 102.
  • the absorber 202 and the condenser 204 are arranged on the intermediate circuit 300 successively, that is to say in series, so that the intermediate fluid circulates in the absorber 202 to recover the heat rejected by it then circulates in the condenser 204 in which the intermediate fluid also recovers the heat rejected by it.
  • the intermediate circuit can include the condenser 204 and absorber 202 arranged in parallel.
  • the condenser 204 and absorber 202 arranged in parallel.
  • the intermediate circuit 300 comprises branches configured to allow the circulation of the intermediate fluid without circulating in the absorber 202 or the condenser 204.
  • the intermediate circuit comprises the circulation in the absorber 202 or in its first branch according to whether or not the heat from the absorber must be recovered depending on the needs and temperatures of predefined points in the system, then circulation in the condenser 204 or in its second bypass depending on whether or not the heat from the absorber must be recovered or not according to the needs and temperatures of predefined points of the system.
  • the intermediate fluid enters the absorber 202 at a temperature of around 35°C and leaves it at a temperature of around 58°.
  • the intermediate fluid enters the condenser 204 at this temperature and leaves at a temperature of around 75°.
  • the intermediate fluid circulates in the preheating device of the ORC cycle 100, in particular in the first preheating exchanger 102. Depending on the needs of the ORC cycle, the intermediate fluid transmits more or less heat to the ORC cycle 100.
  • the intermediate circuit 300 comprises a first intermediate exchanger 301 arranged on the intermediate circuit 300 between the ORC cycle 100 and the absorption cycle 200, that is to say between the preheating device and the absorber 202 or the condenser 204, if the absorber 202 is not arranged on the intermediate circuit 300.
  • the first intermediate exchanger 301 is arranged downstream of the preheating device and more precisely of the first preheating exchanger 102.
  • the first intermediate exchanger 301 is arranged upstream of the absorber 202, or of the condenser 204 if the absorber 2022 is not arranged on the intermediate circuit 300.
  • the first intermediate exchanger 301 makes it possible to use the residual heat of the intermediate fluid at the outlet of the device preheating.
  • the first intermediate exchanger 301 finishes this thermal recovery.
  • a recovery fluid circulates in the first intermediate exchanger 301.
  • the recovery fluid can be a cooling source such as an air flow coming from a cooling tower or from a unit heater.
  • the recovery fluid is intended to supply a domestic hot water network. This arrangement makes it possible both to use all of the thermal energy rejected by the absorption cycle 200 and to ensure that the fluid intermediate can once again play its function as a cold source near the absorber 202 and/or the condenser 204.
  • the intermediate fluid is chosen from water or oil.
  • the intermediate circuit 300 comprises a fluid connection L arranged between the condenser 204 and the preheating device, more precisely the first preheating exchanger 102 to ensure the circulation of the intermediate fluid between the outlet of the condenser 204, preferably directly, towards the inlet of the preheating device, more precisely the first preheating exchanger 102.
  • the intermediate circuit 300 comprises a fluid connection M arranged between the preheating device, more precisely the first preheating exchanger 102 and advantageously the first intermediate exchanger 301 to ensure the circulation of the fluid intermediate between the preheating device outlet, more precisely the first preheating exchanger 102, towards, preferably directly, the inlet of the first intermediate exchanger 301.
  • the intermediate circuit 300 comprises a fluid connection N arranged between the first intermediate exchanger 301 and the absorber 202 to ensure the circulation of the intermediate fluid from the outlet of the first intermediate exchanger 301 towards, preferably directly, the inlet of the absorber 202.
  • the intermediate circuit comprises a fluid connection O arranged between the absorber 202 and the condenser 204 to ensure the circulation of the intermediate fluid from the outlet of the absorber 200 towards, preferably directly, the inlet of the condenser 204.
  • the system comprises an additional thermal connection between the ORC cycle 100 and the absorption cycle 200.
  • This additional thermal connection is in addition to the thermal connection provided by the intermediate circuit 300.
  • the system comprises a thermal connection between the second evaporator 205 of the absorption cycle 200 and the first condenser 106 of the ORC cycle 100.
  • the thermal connection is advantageously ensured by a cold source 501 coming from the second evaporator 205 of the absorption cycle 200 towards the first condenser 106 of the ORC cycle. This arrangement is particularly useful for ensuring a temperature of cold source 501 at the first condenser 106 that is sufficiently low whatever the climatic conditions.
  • the condenser 106 of the ORC cycle requires cooling to condense the vapor leaving the expander 105.
  • the absorption cycle 200 therefore makes it possible to provide additional cooling thanks to thermal coupling.
  • the second evaporator 205 of the absorption cycle 200 is used to cool the cold source 501 of the first condenser 106 of the ORC cycle 100.
  • a source to be cooled 500 circulates beforehand in the second evaporator 205 to ensure the evaporation of the working solution of the absorption cycle 200.
  • the heat source 500 transfers thermal energy to the absorption cycle 200 and cools from the second evaporator 205 in the form of a cold source 501.
  • the cold source 501 supplies the first condenser 106 to allow optimal condensation of the working fluid.
  • the system comprises a fluid connection P arranged to penetrate into the second evaporator 205 and ensure the entry of the first source to be cooled 500 into the second evaporator 205.
  • the system comprises a fluid connection Q arranged between the second evaporator 205 and the first condenser 106 to ensure the circulation of the cold source 501 from the outlet of the evaporator 205, preferably directly, towards the inlet of the condenser 106.
  • the system comprises a fluid connection R ensuring the outlet of the cold source 501 outside the condenser 106.
  • the condenser 106 may include a complementary cold source.
  • the source to be cooled 500 comes from a cooling circuit conventionally used for cooling an ORC cycle.
  • the source to be cooled 500 is chosen from an air flow coming from an air heater or a cooling tower.
  • the source to be cooled 500 and the recovery fluid 502 come from the same cooling circuit supplied by an air heater or a cooling tower.
  • the source to be cooled 500 enters the second evaporator 205 at a temperature of around 25°C.
  • the source to be cooled 500 emerges in the form of a cold source 501 at a temperature of around 20°C to enter the first condenser 106.
  • the cold source 501 emerges from the condenser 106 at a temperature of around 50°C .
  • the invention comprises an additional thermal connection between the ORC cycle and the absorption cycle 200.
  • the additional thermal connection is intended to ensure the thermal connection between the generator 203 of the absorption cycle 200 and at least the second evaporator 104 of the ORC cycle 100
  • the additional thermal connection is configured to use as the second heat source 405 of the generator 203 of the absorption cycle 200, the first heat source 400 supplying the first evaporator 104 of the ORC cycle 100.
  • the first heat source 400 supplying the first evaporator 104 can come from renewable energy such as geothermal, solar, or waste energy. such as residual thermal energy from industrial processes, or even fossil energy.
  • the first hot source 400 enters the first evaporator 104 at a temperature between 90° and 200°C.
  • the hot source 400 emerges from the first evaporator 104 and possibly passes through the preheating device and more precisely the second preheating exchanger 103.
  • the heat source 400 emerges, for example, at a temperature of the order of 90°C.
  • the system according to the invention advantageously comprises at least one tap 401, 402, 403 ensuring the bypass of a part of the first heat source 400 for the benefit of the generator 203.
  • the system advantageously comprises a control module ensuring the operation of the at least one tap 401, 402, 403 depending on the temperatures of the hot source 400 and the needs of the generator 203.
  • the system comprises three taps 401, 402, 403.
  • the system advantageously comprises a first tap 401 arranged in upstream of the inlet of the first hot source 400 in the first evaporator 104.
  • the system advantageously comprises a second tap 402 arranged downstream of the outlet of the first hot source 400 of the first evaporator 104 and upstream of the heating device more precisely of the second preheating exchanger 103.
  • the system advantageously comprises a third tap 402 arranged downstream of the outlet of the hot source of the second preheating exchanger 103.
  • the first hot source 400 coming from one of the connections 401, 402, 403 circulates directly in the generator 203, the first hot source 400 and the second hot source 405 are identical.
  • the system comprises a second intermediate exchanger 404 ensuring the thermal transfer of the first hot source 400 for the benefit of a second hot source 405.
  • the second hot source 405 circulates in a closed circuit between the second intermediate exchanger 404 and the generator 203.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
EP23201246.8A 2022-10-04 2023-10-02 System zur energieerzeugung mit einem organischen rankine-zyklus und integriertem absorptionszyklus Pending EP4350129A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2210128A FR3140399A1 (fr) 2022-10-04 2022-10-04 Système de production d’énergie par cycle de Rankine organique et cycle à absorption intégrés

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EP4350129A1 true EP4350129A1 (de) 2024-04-10

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EP23201246.8A Pending EP4350129A1 (de) 2022-10-04 2023-10-02 System zur energieerzeugung mit einem organischen rankine-zyklus und integriertem absorptionszyklus

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2447483A2 (de) 2010-10-29 2012-05-02 General Electric Company Rankine-Prozess, der mit einer Absorptionskälteanlage integriert ist
US20120125002A1 (en) * 2010-11-19 2012-05-24 General Electric Company Rankine cycle integrated with organic rankine cycle and absorption chiller cycle
CN104236161A (zh) * 2013-06-17 2014-12-24 苏州新华软智能装备有限公司 一种余热回收利用***
US20160108763A1 (en) * 2014-10-15 2016-04-21 Umm Al-Qura University Rankine cycle power generation system with sc-co2 working fluid and integrated absorption refrigeratino chiller
US11248499B2 (en) * 2018-07-23 2022-02-15 Javier Carlos Velloso Mohedano Installation to generate mechanical energy using a combined power cycle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2447483A2 (de) 2010-10-29 2012-05-02 General Electric Company Rankine-Prozess, der mit einer Absorptionskälteanlage integriert ist
US20120102996A1 (en) * 2010-10-29 2012-05-03 General Electric Company Rankine cycle integrated with absorption chiller
US20120125002A1 (en) * 2010-11-19 2012-05-24 General Electric Company Rankine cycle integrated with organic rankine cycle and absorption chiller cycle
CN104236161A (zh) * 2013-06-17 2014-12-24 苏州新华软智能装备有限公司 一种余热回收利用***
US20160108763A1 (en) * 2014-10-15 2016-04-21 Umm Al-Qura University Rankine cycle power generation system with sc-co2 working fluid and integrated absorption refrigeratino chiller
US11248499B2 (en) * 2018-07-23 2022-02-15 Javier Carlos Velloso Mohedano Installation to generate mechanical energy using a combined power cycle

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