ES2439619R1 - Device for mechanical power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and use procedure - Google Patents

Device for mechanical power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and use procedure Download PDF

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Publication number
ES2439619R1
ES2439619R1 ES201200731A ES201200731A ES2439619R1 ES 2439619 R1 ES2439619 R1 ES 2439619R1 ES 201200731 A ES201200731 A ES 201200731A ES 201200731 A ES201200731 A ES 201200731A ES 2439619 R1 ES2439619 R1 ES 2439619R1
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ES
Spain
Prior art keywords
flow
output
column
line
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
ES201200731A
Other languages
Spanish (es)
Other versions
ES2439619A2 (en
Inventor
Antonio J. Rovira De Antonio
José María Martínez-Val Peñalosa
Manuel Valdés Del Fresno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universidad Nacional de Educacion a Distancia
Universidad Politecnica de Madrid
Original Assignee
Universidad Nacional de Educacion a Distancia
Universidad Politecnica de Madrid
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universidad Nacional de Educacion a Distancia, Universidad Politecnica de Madrid filed Critical Universidad Nacional de Educacion a Distancia
Priority to ES201200731A priority Critical patent/ES2439619R1/en
Publication of ES2439619A2 publication Critical patent/ES2439619A2/en
Publication of ES2439619R1 publication Critical patent/ES2439619R1/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/04Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for the fluid being in different phases, e.g. foamed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/32Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters

Abstract

Device for power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and its method of use, comprising a heat input device (8), an expander (1), a regenerator (2) and a compressor (6) setting up a Brayton cycle; a condenser (11) and a drive pump (14) configuring a Rankine cycle; so that a mass flow of fluid circulates in its secondary circuit, and the regenerator, in its secondary circuit of cooling that divides in two at its exit, one called main flow that follows the Rankine cycle and another called flow balancer that runs through the Brayton cycle, the main flow liquid regenerating after it passes through the condenser and the pump, and which joins the balancer after it passes through the compressor, to complete the cycles, selecting the amount of flow balancing form that the regenerator is thermally balanced.

Description

Claims (2)

  1. SPANISH OFFICE OF THE PATENTS AND BRAND
    Application no .: 201200731
    SPAIN
    Date of submission of the application: 16.07.2012
    Priority Date:
    REPORT ON THE STATE OF THE TECHNIQUE
    51 Int. Cl.: See Additional Sheet
     RELEVANT DOCUMENTS
    Category
    56 Documents cited Claims Affected
    Y
    US 2008121755 A1 (BENNETT CHARLES L) 29.05.2008, paragraphs [0004,0024,0034-0066,0092-0100]; Figures 21.22. 1-8
    Y
    EP 2042470 A2 (WOJAK BODGAN) 01.04.2009, paragraphs [0001,0016-0028,0030-0057,0060]; Figures 1-7. 1-8
    TO
    US 3708979 A (BUSH V et al.) 09.01.1973, column 1, lines 4-8; column 1, line 44 - column 4, line 11; column 5, line 12 - column 7, line 60; column 13, line 46 - column 17, line 39; figures 2.4. 5.6
    TO
    WO 0060226 A1 (STANKOVIC BRANKO) 12.10.2000, pages 1,7-16; figure 9. 1.7
    TO
    XP 004061865 (LIOR, NOAM) 31.08.1997, ENERGY CONVERSION AND MANAGEMENT, ELSEVIER SCIENCE PUBLISHERS, OXFORD, GB. Advanced energy conversion to power, pages 941-955; Figures 1-3.9. WPI DATABASE at EPOQUE, http://dx.doi.org/10.1016/S0196-8904(96)00125-2 1.7
    Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application
    This report has been prepared • for all claims • for claims no:
    Date of realization of the report 18.02.2014
    Examiner M. C. Fernández Rodríguez Page 1/6
    REPORT OF THE STATE OF THE TECHNIQUE
    CLASSIFICATION OBJECT OF THE APPLICATION
    F01K27 / 00 (2006.01) F01K7 / 32 (2006.01) F01K25 / 04 (2006.01) F01K3 / 18 (2006.01)
    Minimum documentation sought (classification system followed by classification symbols)
    F01K
    Electronic databases consulted during the search (name of the database and, if possible, search terms used)
    INVENTIONS, EPODOC
    Date of Completion of Written Opinion: 02.28.2014
    Statement
    Novelty (Art. 6.1 LP 11/1986)
    Claims Claims 1-8 IF NOT
    Inventive activity (Art. 8.1 LP11 / 1986)
    Claims Claims 1-8 IF NOT
    The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).
     Opinion Base.-
    This opinion has been made on the basis of the patent application as published.
     1. Documents considered.-
    The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.
    Document
    Publication or Identification Number publication date
    D01
    US 2008121755 A1 (BENNETT CHARLES L) 05/29/2008
    D02
    EP 2042470 A2 (WOJAK BODGAN) 04.01.2009
    D03
    US 3708979 A (BUSH V et al.) 09.01.1973
  2.  2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement
    D01 (See D01, paragraphs [0004, 0024, 0034-0066, 0092-0100]; Figures 21, 22.) discloses a device for generating mechanical energy, for the operation of an airplane, according to a regenerative and balanced Brayton-Rankine hybrid cycle which includes: -a working fluid (302, 304, 305) condensable, for which a supercritical pressure is reached at a temperature supercritical, that is, a pseudo critical point Cp of a supercritical isobara, or point of higher heat is defined specific to constant supercritical pressure. Theoretically, pure LiH has an infinite vapor pressure, just below of the melting point, then the Cp is infinite at the critical point. - an expansion unit (201) of the working fluid in the gas phase; -a heat exchanger (202, 203), regenerator type, with two circuits, the primary one that receives heat and the secondary one that yields it; -a flow division line (212); - an equipment for compression (205) of the gas phase fluid; -a device for the condensation (204) of the air-cooled fluid whose temperature at the entrance of the equipment is marked by the environment; -a drive pump (205), to circulate and pressurize the fluid in liquid phase (302); -a main heat input equipment (208) to the fluid thermally fed by a heating fluid that comes from a thermal source and that may be the cycle's own working fluid (304); -a union of flows (206); -and a transmitter or transformer of mechanical power produced, which is the rotational axis that reaches a motor (115), From a solar concentrator. and in which the previous components are connected as follows: -the duct or outlet manifold of the main heat input equipment (208) is connected to the input of the expansion (201); -the output of the expansion equipment (201) is connected to the exchanger, regenerator (202, 203) by the input of its circuit secondary; -the output of the condensing equipment (204) is connected to the inlet to the discharge pump (205); (fig. 24) -the output of the drive pump (205) is connected to the regenerator by the input of its primary circuit; (fig. 24) such that: -the output of the secondary circuit of the regenerator (202, 203) is connected to the flow division line (212); - and the main flow inlet of the flow division line (212) is connected to the condensation equipment (204); -and the output of the flow balancer of the flow division line (212) is connected to the input of the equipment compression (205); - and the output of the compression equipment (205) is connected to the output of the primary regenerator circuit (202, 203) through from the cold ethane tank (206);
    (References in parentheses correspond to D01).
    D01 does not disclose in contrast to the request the presence of a flow dividing element, which divides the total flow of entry in two, called main flow and balancing flow; nor that there is an element of union of flows
    D02 (see D02, paragraphs [0001, 0016-0028, 0030-0057, 0060]; Figures 1-7.) Discloses a device for generating mechanical energy according to a regenerative Brayton-Rankine hybrid cycle with the presence of a flow dividing element
    (500) and of an axis or flow joint element (200): -the flow dividing element (500), for the separation of the liquid phase from the vapor phase, and divides the total flow of entry in two, main flow and balancing flow. -and the output of the compression equipment (100) is connected to the output of the primary circuit of the regenerator through the Mixing or flow connecting shaft element (300); -and the output of the shaft element (200) is connected to the input or input manifold of the main heat input (300);
    (References in parentheses correspond to D02).
    It would be evident for an expert in the field, to combine the characteristics described in D02 with those anticipated by the D01, to obtain the mechanical power generation device object of independent claim 1, and considers, therefore, that it has no inventive activity (art.8 L11 / 86).
    D01 also reports that: -the condensation temperature is a Tmin that corresponds to a saturation state with a pressure lower than the critical fluid pressure; this temperature Tmin being greater than the temperature of the external refrigerant of the condenser, marked by the ambient temperature (the critical temperature will preferably be between 10 and 20 degrees higher than the coolant temperature, therefore the Tmin will be 10 degrees higher); -the absolute pressure in the pump drive for the working fluid in liquid phase, is subcritical. -the thermal efficiency for small plants is typically less than 20% -high mass flow power -the Tmax is 950 K. Supercritical temperature of LiH, 700 ºC (973 K). With which there is a difference of approximately 25ºK. Being the entropy Smax. - being determined, with all the previous prescriptions, the thermodynamic states of all the points of entry and exit of the equipment and, consequently, each of them.
    D01 does not specify, unlike the request that the supercritical pressure be greater than the isobar pressure whose point Pseudo-critical has a Cp value three times greater than the Cp of the liquid measured under pump output conditions.
    However, this is considered an obvious option, for a person skilled in the art, in view of the state of the art, and for so much so that claim 2 does not imply inventive activity (art.8 L11 / 86).
    The D02 discloses a device in which the flow divider (500) is integrated in the condenser itself: -a mouth or steam inlet manifold prior to the condenser's own heat exchanger; -a steam collection generator (18), at the top; -and an absorber for collecting condensate (10) at the bottom (fig. 7)
    D02 does not disclose the value of R / Cp. However, it is common knowledge for an expert in the field, that for LiH the gas constant R = 1.5957 and Cp = 1.37, therefore R / Cp = 1,16474453, being 1/16 = 0.0625, then R / Cp> 1/16.
    It is considered, therefore, that it would be obvious for a person skilled in the art to combine the characteristics anticipated by the D02, with those disclosed by D01, to obtain the device object of claim 3, which therefore lacks inventive activity (art.8 L11 / 86).
    D01 does not explicitly disclose the characteristics set forth in the fourth claim. However it is common knowledge for an expert in the field that at P = cte, dH = T dS, with H being the enthalpy and S the entropy.
    D01 says that the expansion is practically isentropic at supercritical temperature, which is 700 ° C for LiH. So, It will be practically isenthal.
    It is evident that the difference in enthalpies is less than 2%. R.T, where R = 1.5957. RT = 1, 5957 * 973 = 1552.6161 K, observing figure 23, since it can be deduced approximately that the enthalpy variation is LH = 973 * 1.4 = 1362.2, resulting in the difference of 1.9%.
    Therefore, it is considered that claim 4 lacks inventive activity (art.8 L11 / 86).
    Claims 5 and 6 represent obvious options for a person skilled in the art, in view of the state of the art. By example D03 (see D03, column 1, lines 4 -8; column 1, line 44 - column 4, line 11; column 5, line 12 - column 7, line 60; column 13, line 46 - column 17, line 39; Figures 2, 4) describe a hot gas engine with the presence of a valve (81) at the output of the primary circuit of the exchanger (26).
    D03 also discloses that the main heat input pressure of the regenerator (P1) is less than the pressure of discharge or maximum pressure (72), and is greater than the geometric mean than the discharge pressure and the minimum pressure, which it must be the expansion one, to cause the valve to open (81). (fig. 2).
    (References in parentheses correspond to D03).
    Therefore it is considered that claims 5 and 6 do not imply inventive activity (art.8 L11 / 86).
    The D02 discloses a device in which the expansion is carried out in two stages, with an intermediate reheating (500): the expansion equipment includes two expansion bodies, two steam turbines (400, 600), and a second heating circuit in the main heat input equipment (300); the output of the first main heating circuit (300) is connected to the input of the first expander body (400), the output of the first expander body (8) to the input of the second main heating circuit (500), the output of this second circuit at the input of the second expander body (600), and the latter's output at the input of the secondary circuit of the regenerator.
    Although the D02 does not disclose an assembly exactly the same as claimed, it is considered that the device object of claim 7, represents an obvious design option for a person skilled in the art, and therefore does not imply inventive activity (art.8 L11 / 86).
    D02 also reports that the turbine (400) of the main circuit has a conversion efficiency of 23.7%.
    Therefore, it is considered that claim 8 lacks inventive activity (art. 8 L11 / 86).
ES201200731A 2012-07-16 2012-07-16 Device for mechanical power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and use procedure Pending ES2439619R1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES201200731A ES2439619R1 (en) 2012-07-16 2012-07-16 Device for mechanical power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and use procedure

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ES201200731A ES2439619R1 (en) 2012-07-16 2012-07-16 Device for mechanical power generation according to a regenerative and balanced Brayton-Rankine hybrid cycle and use procedure

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ES2439619A2 ES2439619A2 (en) 2014-01-23
ES2439619R1 true ES2439619R1 (en) 2014-02-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2738663A1 (en) * 2018-07-23 2020-01-24 Mohedano Javier Carlos Velloso A facility for mechanical power generation through a Combined Power Cycle (Machine-translation by Google Translate, not legally binding)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708979A (en) * 1971-04-12 1973-01-09 Massachusetts Inst Technology Circuital flow hot gas engines
US4061865A (en) * 1972-09-21 1977-12-06 Ono Pharmaceutical Company Prostaglandin analogues
WO2000060226A1 (en) * 1999-04-06 2000-10-12 Branko Stankovic Brayton or brayton-rankine combined cycle with hot-gas recirculation and inverse mixing ejector
US20080121755A1 (en) * 2004-04-30 2008-05-29 The Regents Of The University Of California. Rankine-Brayton engine powered solar thermal aircraft
EP2042470A2 (en) * 2007-09-25 2009-04-01 Bodgan Wojak Gas turbine topping device in a sytem for manufacturing sulfuric acid and method of using turbine to recover energy in manufacture of sulphuric acid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708979A (en) * 1971-04-12 1973-01-09 Massachusetts Inst Technology Circuital flow hot gas engines
US4061865A (en) * 1972-09-21 1977-12-06 Ono Pharmaceutical Company Prostaglandin analogues
WO2000060226A1 (en) * 1999-04-06 2000-10-12 Branko Stankovic Brayton or brayton-rankine combined cycle with hot-gas recirculation and inverse mixing ejector
US20080121755A1 (en) * 2004-04-30 2008-05-29 The Regents Of The University Of California. Rankine-Brayton engine powered solar thermal aircraft
EP2042470A2 (en) * 2007-09-25 2009-04-01 Bodgan Wojak Gas turbine topping device in a sytem for manufacturing sulfuric acid and method of using turbine to recover energy in manufacture of sulphuric acid

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