WO2014110003A1 - Utilisation d'une charge de résistance refroidie par eau dans une commande de moteur stirling à piston libre pour compenser des pertes - Google Patents

Utilisation d'une charge de résistance refroidie par eau dans une commande de moteur stirling à piston libre pour compenser des pertes Download PDF

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Publication number
WO2014110003A1
WO2014110003A1 PCT/US2014/010413 US2014010413W WO2014110003A1 WO 2014110003 A1 WO2014110003 A1 WO 2014110003A1 US 2014010413 W US2014010413 W US 2014010413W WO 2014110003 A1 WO2014110003 A1 WO 2014110003A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
resistor load
free
stirling engine
piston stirling
Prior art date
Application number
PCT/US2014/010413
Other languages
English (en)
Inventor
Ben FIGLIN
Alex ILIESCU
Original Assignee
Qnergy Ltd.
Klein, David
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 Qnergy Ltd., Klein, David filed Critical Qnergy Ltd.
Publication of WO2014110003A1 publication Critical patent/WO2014110003A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/053—Component parts or details
    • F02G1/055—Heaters or coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D18/00—Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
    • F02G1/0435—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines the engine being of the free piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • F24H1/202—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2256/00—Coolers
    • F02G2256/50—Coolers with coolant circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2101/00—Electric generators of small-scale CHP systems
    • F24D2101/80—Electric generators driven by external combustion engines, e.g. Stirling engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2103/00—Thermal aspects of small-scale CHP systems
    • F24D2103/10—Small-scale CHP systems characterised by their heat recovery units
    • F24D2103/13—Small-scale CHP systems characterised by their heat recovery units characterised by their heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

Definitions

  • the present invention relates generally to a free-piston Stirling engine, and particularly to improvements in resistive load control of such an engine.
  • a free-piston Stirling engine is a closed-cycle, reversible heat engine which converts heat into work by moving a confined volume of working gas between a relatively warmer heat acceptor and a relatively cooler heat rejecter.
  • the resulting alternating, cyclical, expansion and compression of the internal working gas provides an oscillating pressure wave that drives a piston to oscillate substantially sinusoidally in linear reciprocation.
  • the piston is mechanically linked to a ring of permanent magnets that it drives in reciprocation within the winding or coil of the linear alternator thereby inducing a voltage across the winding terminals.
  • An FPSE is usually controlled by a high power resistive load during transient modes, such as start, stop, or "no-external load" condition.
  • the resistive load may also be used to modulate the system when a different operating power point is required.
  • the present invention seeks to provide an improved resistive load control of free- piston Stirling engines, as is explained more in detail hereinbelow.
  • a high power resistive load of an FPSE is integrated into a water loop of a combined heat and power (CHP) appliance (system).
  • CHP combined heat and power
  • a typical CHP appliance such as a micro combined heat and power (mCHP) appliance
  • heat usually in the form of hot air or water
  • electricity are the two forms of energy that are generated.
  • the heat produced from a combustion process can drive an electric generator, as well as heat up water, which means the CHP appliance generally already has a water loop system.
  • the invention takes advantage of the water system that already exists in the CHP system to cool down the high power load resistor. The heat generated by the resistor is not wasted; rather it is recuperated into the water heating system which offsets losses and leads to higher overall efficiency.
  • a free-piston Stirling engine includes a heat exchanger that outputs to a resistor load, and the resistor load is water-cooled by the water loop.
  • Fig. 1 is a simplified illustration of a free-piston Stirling engine control system, constructed and operative in accordance with an embodiment of the present invention.
  • Fig. 1 illustrates a free-piston Stirling engine control system (combined heat and power system) 10, constructed and operative in accordance with a non-limiting embodiment of the present invention.
  • System 10 includes a FPSE 12, which may include a cold water heat exchanger 14 with a cold water input 16.
  • FPSE 12 is integrated with a hot water boiler or buffer tank 20 of a combined heat and power appliance 21, such as a mCHP (micro combined heat and power) appliance, which has an existing water loop, designated generally as water loop 22.
  • a control water-cooled resistor load 18 is added to loop 22, so that the output of cold water heat exchanger 14 flows to water-cooled resistor load 18, and from there, to hot water boiler or buffer tank 20.
  • a heater resistor load 24 may be at least partially immersed in hot water boiler or buffer tank 20.
  • the high power load resistor may be manufactured by a length of resistive wire coiled around the water cooling loop piping and attached to the pipe in such a way that prevents electrical shorts while still maintaining good thermal contact between the wire and the pipe.
  • Integrating the high power resistor 18 and/or 24 into the water cooling loop 22 has several benefits, such as:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

L'invention porte sur un système de chaleur et d'énergie combiné (10), lequel système comprend une boucle d'eau (22) d'un appareil de chaleur et d'énergie combiné (21). Un moteur Stirling à piston libre (12) comprend un échangeur de chaleur qui sort vers une charge de résistance (18), et la charge de résistance (18) est refroidie par eau par la boucle d'eau (22).
PCT/US2014/010413 2013-01-10 2014-01-07 Utilisation d'une charge de résistance refroidie par eau dans une commande de moteur stirling à piston libre pour compenser des pertes WO2014110003A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361750874P 2013-01-10 2013-01-10
US61/750,874 2013-01-10

Publications (1)

Publication Number Publication Date
WO2014110003A1 true WO2014110003A1 (fr) 2014-07-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/010413 WO2014110003A1 (fr) 2013-01-10 2014-01-07 Utilisation d'une charge de résistance refroidie par eau dans une commande de moteur stirling à piston libre pour compenser des pertes

Country Status (1)

Country Link
WO (1) WO2014110003A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521539B (en) * 2012-05-01 2016-06-08 Sustainable Power Ltd Micro combined heat and power unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309877A (en) * 1980-09-08 1982-01-12 Co-Gen, Inc. Total energy system including means for utilizing supplementary heats
WO2001090656A1 (fr) * 2000-05-26 2001-11-29 Enatec Micro-Cogen B.V. Appareil et procede assurant la generation combinee de la chaleur et de l'electricite
WO2003052254A1 (fr) * 2001-12-19 2003-06-26 Microgen Energy Limited Unite domestique combinee thermoelectrique
DE10244343A1 (de) * 2002-09-24 2004-04-01 Robert Bosch Gmbh Anlage zur Kraft-Wärme-Kopplung mit Nutzung der Abwärme von Peripherieaggregaten
US20050161521A1 (en) * 2003-11-07 2005-07-28 Guyer Eric C. System and method for hydronic space heating with electrical power generation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309877A (en) * 1980-09-08 1982-01-12 Co-Gen, Inc. Total energy system including means for utilizing supplementary heats
WO2001090656A1 (fr) * 2000-05-26 2001-11-29 Enatec Micro-Cogen B.V. Appareil et procede assurant la generation combinee de la chaleur et de l'electricite
WO2003052254A1 (fr) * 2001-12-19 2003-06-26 Microgen Energy Limited Unite domestique combinee thermoelectrique
DE10244343A1 (de) * 2002-09-24 2004-04-01 Robert Bosch Gmbh Anlage zur Kraft-Wärme-Kopplung mit Nutzung der Abwärme von Peripherieaggregaten
US20050161521A1 (en) * 2003-11-07 2005-07-28 Guyer Eric C. System and method for hydronic space heating with electrical power generation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521539B (en) * 2012-05-01 2016-06-08 Sustainable Power Ltd Micro combined heat and power unit

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