US20140013749A1 - Waste-heat recovery system - Google Patents

Waste-heat recovery system Download PDF

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Publication number
US20140013749A1
US20140013749A1 US13/996,220 US201113996220A US2014013749A1 US 20140013749 A1 US20140013749 A1 US 20140013749A1 US 201113996220 A US201113996220 A US 201113996220A US 2014013749 A1 US2014013749 A1 US 2014013749A1
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US
United States
Prior art keywords
waste
coolant
orc
generator
recovery system
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.)
Abandoned
Application number
US13/996,220
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English (en)
Inventor
Anayet Temelci-Andon
Konrad Herrmann
Stefan Müller
Harald Köhler
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.)
Robert Bosch GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERRMANN, KONRAD, KOEHLER, HARALD, MUELLER, STEFAN, TEMELCI-ANDON, ANAYET
Publication of US20140013749A1 publication Critical patent/US20140013749A1/en
Abandoned 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
    • 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
    • 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

Definitions

  • the present invention relates to a waste-heat recovery system.
  • ORC Organic-Rankine Cycle
  • Rankine is a thermodynamic cyclic process according to Rankine. This means that a working medium runs through various thermodynamic states in order to be transferred back into the initial liquid state again at the end. In the process, the working medium is brought to a higher pressure level by a pump. Then, the working medium is preheated to evaporation temperature and subsequently evaporated.
  • ORC systems are also advantageous when used for exploiting biomass in connection with a combined generation of electricity and heat, especially at relatively low outputs, i.e., when the conventional biomass combustion technology seems relatively expensive.
  • Biomass plants often have a fermenting device for the production of biogas, which normally has to be heated.
  • German patent document DE 195 41 521 A1 describes a system for increasing the electrical efficiency in the generation of power from special gases by means of combustion engines, in which the waste heat of the engine is utilized for the further energy generation in a post-connected energy-conversion system.
  • the waste heat of the engine is utilized for the further energy generation in a post-connected energy-conversion system.
  • only the high-temperature heat from the cooling-water circuit as well as the exhaust-gas heat exchanger of the engine is provided for exploitation.
  • a diesel power unit integrated into a Rankine process is known from the U.S. Pat. No. 4,901,531, in which one cylinder is used for the expansion according to Rankine, and the other cylinders operate as diesel engine.
  • U.S. Pat. No. 4,334,409 describes a system operating according to the Rankine process, in which the working fluid is preheated by a heat exchanger, through which the air from the outlet of a compressor of a machine having internal combustion is routed.
  • Block thermal power plants as plants for the cogeneration of electricity and heat are generally known. These are decentralized power generation plants, often driven by combustion engines, featuring simultaneous utilization of the waste heat. As far as possible, the heat withdrawn via the cooling media during combustion is used for heating suitable objects.
  • the mixture cooling of the combustion engine is connected to the first heat exchanger downstream from the feeding pump, the heat from the cooling of the combustion-gas mixture aspirated by the combustion engine being used to preheat the process medium in the ORC and coupled into the first heat exchanger in the form of low-temperature heat.
  • a second heating circuit obtains heat from the engine cooling water and exhaust gas of the internal combustion machine and is connected to the second heat exchanger downstream from the feeding pump, the heat from the cooling circuit and the exhaust gas being used to overheat and evaporate the process medium in the ORC and being input into the second heat exchanger downstream from the feeding pump in the form of high temperature heat.
  • the present invention is based on the objective of optimizing the design and safe operating behavior of a waste-heat recovery system made up of an ORC post-connected to a waste-heat source.
  • the waste heat recovery system is made up of, among other components, an expansion machine for vapor expansion in the
  • ORC which has magnetic bearings with an associated control device and a power supply via a direct current intermediate circuit of a generator frequency converter.
  • the waste heat recovery system is characterized by a unit which is cooled by the coolant from the ORC circuit and made up of expansion machine, generator and frequency converter.
  • cool liquid coolant is extracted downstream from the feeding pump in the present invention and conveyed for cooling purposes to the unit made up of expansion machine, generator and frequency converter.
  • the cool liquid coolant is removed downstream from the feeding pump and directly forwarded to the expansion machine to cool the bearing.
  • heated coolant emerging from the unit made up of expansion machine, generator and frequency converter and/or from the bearing region of the expansion machine is supplied to the condenser on the intake side.
  • temperature ranges of the coolant used for cooling of approximately 15° C. to 50° C. on the intake side, and approximately 30° C. to 80° C. on the discharge side are involved, the particular temperatures depending on the current operating state of the component parts and/or subassemblies to be cooled, as well as the overall waste heat recovery system.
  • a temperature-monitoring device which is linked to a superposed control device having temperature measuring points in the component parts and/or subassemblies to be cooled.
  • This temperature-monitoring device compares current measured temperature values to predefinable setpoint values, analyzes them and/or optimally controls the coolant throughput accordingly.
  • separate control circuits having separate cooling channels or corresponding lines are provided for the component parts and/or subassemblies to be cooled.
  • These individual control circuits assigned to the various component parts and/or subassemblies to be cooled have valves, preferably magnetic valves, to control the coolant throughput, so that the particular local temperature situation is able to be managed in optimal manner.
  • the design and the operating behavior of a waste-heat recovery plant which is composed of an ORC downstream from a waste-heat source, is optimized.
  • Waste-heat sources may be, for example, combined heat and power plants, industrial plants or boiler plants.
  • the waste heat recovery system is optimally cooled by the measures according to the present invention, in a manner that takes the current situation into account.
  • This is a prerequisite for a safe, robust system operation, on the one hand, and also for an effective and careful operation of the individual components, on the other, each component having particular requirements with regard to cooling.
  • This applies not only to the steady-state operation of the waste heat recovery system, but also to the modulation of the system in accordance with the waste heat volume as well as the start-up and shutdown.
  • These states in particular, constitute a challenge for the cooling system and are able to be managed in a safe manner according to the present invention.
  • the FIGURE shows the schematic structure of a waste-heat recovery plant made up of an ORC post-connected thereto.
  • ORC circulation circuit 1 The components that are important for operating the ORC are an ORC circulation circuit 1 , a feeding pump 2 , an evaporator 3 , an expansion machine 4 for vapor expansion, which is coupled to a generator 5 , a condenser 6 for recooling via a heat sink 7 , and heat exchangers 8 , 9 for preheating the working medium in ORC circulation system 1 .
  • the two heat exchangers 8 , 9 are connected in series downstream from feeding pump 2 .
  • First heat exchanger 8 downstream from feeding pump 2 is used as a first stage for the incoupling of low-temperature heat, and following heat exchanger 9 is used as a second stage for the incoupling of high-temperature heat from a waste-heat source 10 .
  • a second heat circuit 11 is connected via its supply region to evaporator 3 of the ORC, because the temperature level initially is sufficiently high for its direct heating. Then, second heating circuit 11 discharges into second heat exchanger 9 on the return side, where is releases still existing residual heat to the ORC.
  • a liquid partial coolant flow 12 for cooling the expansion machine 4 is rerouted and first guided through generator 5 .
  • the cooling medium flows through the housing of expansion machine 4 , where it initially releases heat for preheating in the start-up phase and ensures sufficient heat dissipation during normal operation.
  • Only a simplified, schematic line design, without the required branching points to the individual component parts or subassemblies, sub-circuits, temperature-measuring points, valves and control devices are depicted in the drawing in this context.
  • a steam valve 13 at the intake of expansion machine 4 is opened for steam expansion in the ORC, and during the further opening of steam valve 13 , a further run-up of the engine speed takes place so that generator 5 transitions from motor-actuated operation to normal generator operation.
  • a controlled bypass 14 having at least one throttle valve is provided around expansion machine 4 .
  • This bypass 14 is initially open in the start-up phase, i.e., at a still relatively low temperature of the working medium.
  • the working medium is routed around expansion machine 4 in this way.
  • throttle valve 15 in bypass 14 is closed, and steam valve 13 upstream from expansion machine 4 is opened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Motor Or Generator Cooling System (AREA)
US13/996,220 2010-12-24 2011-12-23 Waste-heat recovery system Abandoned US20140013749A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010056299A DE102010056299A1 (de) 2010-12-24 2010-12-24 Abwärmenutzungsanlage
DE102010056299.8 2010-12-24
PCT/EP2011/073920 WO2012085264A2 (de) 2010-12-24 2011-12-23 Abwärmenutzungsanlage

Publications (1)

Publication Number Publication Date
US20140013749A1 true US20140013749A1 (en) 2014-01-16

Family

ID=45418691

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/996,220 Abandoned US20140013749A1 (en) 2010-12-24 2011-12-23 Waste-heat recovery system

Country Status (6)

Country Link
US (1) US20140013749A1 (de)
EP (1) EP2655813B1 (de)
CN (1) CN103620167A (de)
DE (1) DE102010056299A1 (de)
RU (1) RU2013134398A (de)
WO (1) WO2012085264A2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109337798A (zh) * 2018-12-07 2019-02-15 黑龙江省能源环境研究院 沼液余热回收利用系统及工作方法
CN109401954A (zh) * 2018-12-07 2019-03-01 黑龙江省能源环境研究院 沼气发酵反应器外部增温换热系统及工作方法
CN110173313A (zh) * 2019-05-28 2019-08-27 上海慕帆动力科技有限公司 应用于发动机余热回收的高参数orc透平发电设备及orc装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014202487A1 (de) * 2014-02-12 2015-08-13 Robert Bosch Gmbh Steuergerät, Wärmekopplungskreislauf sowie Verfahren zum Betrieb solch eines Wärmekopplungskreislaufs
DE202017107002U1 (de) * 2017-11-18 2019-02-19 Bdr Thermea Group B.V. Blockheizkraftwerk
US11015846B2 (en) 2018-12-20 2021-05-25 AG Equipment Company Heat of compression energy recovery system using a high speed generator converter system

Citations (5)

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US3035557A (en) * 1959-07-23 1962-05-22 Sulzer Ag Method of cooling resuperheaters of a steam plant
US5671601A (en) * 1992-10-02 1997-09-30 Ormat Industries, Ltd. Geothermal power plant operating on high pressure geothermal fluid
US8146360B2 (en) * 2007-04-16 2012-04-03 General Electric Company Recovering heat energy
US8739538B2 (en) * 2010-05-28 2014-06-03 General Electric Company Generating energy from fluid expansion
US8839622B2 (en) * 2007-04-16 2014-09-23 General Electric Company Fluid flow in a fluid expansion system

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FR2449780A1 (fr) 1979-02-22 1980-09-19 Semt Procede et dispositif de recuperation d'energie thermique dans un moteur a combustion interne suralimente
US4901531A (en) 1988-01-29 1990-02-20 Cummins Engine Company, Inc. Rankine-diesel integrated system
ES2083627T3 (es) * 1991-07-17 1996-04-16 Siemens Ag Procedimiento para la operacion de una instalacion de turbina de gas y vapor e instalacion para la realizacion del procedimiento.
DE19541521A1 (de) 1995-11-08 1997-07-31 Schmeink & Cofreth En Manageme Steigerung des elektrischen Wirkungsgrades bei der Verstromung von Sondergasen
US20070007771A1 (en) * 2003-08-27 2007-01-11 Ttl Dynamics Ltd. Energy recovery system
JP4427364B2 (ja) * 2004-03-19 2010-03-03 株式会社荏原製作所 発電装置
DE102005048795B3 (de) 2005-10-12 2006-12-28 Köhler & Ziegler Anlagentechnik GmbH Kraft-Wärme-Kopplungsanlage
WO2007088194A2 (de) * 2006-02-02 2007-08-09 Frank Eckert Organic rankine zyklus (orc) - turbogenerator
US7638892B2 (en) * 2007-04-16 2009-12-29 Calnetix, Inc. Generating energy from fluid expansion
DE202007016668U1 (de) * 2007-12-04 2008-02-28 GMK-Gesellschaft für Motoren und Kraftanlagen mbH Anlage zur Stromerzeugung nach dem ORC-Prinzip
US20090277400A1 (en) * 2008-05-06 2009-11-12 Ronald David Conry Rankine cycle heat recovery methods and devices
CN101806232A (zh) * 2010-03-17 2010-08-18 昆明理工大学 多级蒸发有机朗肯循环余热回收发电系统及其方法
US8400005B2 (en) * 2010-05-19 2013-03-19 General Electric Company Generating energy from fluid expansion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035557A (en) * 1959-07-23 1962-05-22 Sulzer Ag Method of cooling resuperheaters of a steam plant
US5671601A (en) * 1992-10-02 1997-09-30 Ormat Industries, Ltd. Geothermal power plant operating on high pressure geothermal fluid
US8146360B2 (en) * 2007-04-16 2012-04-03 General Electric Company Recovering heat energy
US8839622B2 (en) * 2007-04-16 2014-09-23 General Electric Company Fluid flow in a fluid expansion system
US8739538B2 (en) * 2010-05-28 2014-06-03 General Electric Company Generating energy from fluid expansion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109337798A (zh) * 2018-12-07 2019-02-15 黑龙江省能源环境研究院 沼液余热回收利用系统及工作方法
CN109401954A (zh) * 2018-12-07 2019-03-01 黑龙江省能源环境研究院 沼气发酵反应器外部增温换热系统及工作方法
CN110173313A (zh) * 2019-05-28 2019-08-27 上海慕帆动力科技有限公司 应用于发动机余热回收的高参数orc透平发电设备及orc装置

Also Published As

Publication number Publication date
WO2012085264A2 (de) 2012-06-28
EP2655813A2 (de) 2013-10-30
DE102010056299A1 (de) 2012-06-28
RU2013134398A (ru) 2015-01-27
CN103620167A (zh) 2014-03-05
EP2655813B1 (de) 2017-04-19
WO2012085264A3 (de) 2013-12-19

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AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TEMELCI-ANDON, ANAYET;HERRMANN, KONRAD;MUELLER, STEFAN;AND OTHERS;REEL/FRAME:031273/0865

Effective date: 20130705

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION