DE102014224098A1 - Burner system for a combined heat and power system with external combustion - Google Patents
Burner system for a combined heat and power system with external combustion Download PDFInfo
- Publication number
- DE102014224098A1 DE102014224098A1 DE102014224098.0A DE102014224098A DE102014224098A1 DE 102014224098 A1 DE102014224098 A1 DE 102014224098A1 DE 102014224098 A DE102014224098 A DE 102014224098A DE 102014224098 A1 DE102014224098 A1 DE 102014224098A1
- Authority
- DE
- Germany
- Prior art keywords
- heat exchanger
- exhaust gas
- burner
- heat
- external combustion
- 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.)
- Withdrawn
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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
- 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
- F02G2254/00—Heat inputs
- F02G2254/10—Heat inputs by burners
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
Die Erfindung betrifft ein Brennersystem für ein Kraft-Wärme-Kopplungssystem mit externer Verbrennung und einer Wärmekraftmaschine. Erfindungsgemäß wird ein Teil des von einem Wärmeübertrager (7) zur Übertragung der Wärme der Abgase des Brenners (6) auf die Wärmekraftmaschine (8) abgekühlten Abgases unmittelbar hinter dem Wärmeübertrager (7) entnommen und zu einer Abgas-Zumischung (9) unmittelbar vor dem Wärmeübertrager (7) dem heißen Abgas des Brenners (6) zu gemischt. Dadurch kann die thermische Belastung des Wärmeübertragers 7 verringert werden.The invention relates to a burner system for a cogeneration system with external combustion and a heat engine. According to the invention, part of the exhaust gas cooled by a heat exchanger (7) for transmitting the heat of the exhaust gases of the burner (6) to the heat engine (8) is taken directly behind the heat exchanger (7) and to an exhaust admixture (9) immediately before Heat exchanger (7) to the hot exhaust gas of the burner (6) to be mixed. Thereby, the thermal load of the heat exchanger 7 can be reduced.
Description
Die Erfindung betrifft ein Brennersystem für ein Kraft-Wärme-Kopplungssystem mit externer Verbrennung. Kraft-Wärme-Kopplungssysteme werden eingesetzt, um gleichzeitig Gebäude zu beheizen und Strom zu erzeugen. Sie können aus einer Wärmekraftmaschine aufgebaut sein, die einen Generator zur Erzeugung von Strom antreibt. Die Abwärme der Wärmekraftmaschine wird für Heizzwecke verwendet. Bei der Wärmekraftmaschine kann es sich um einen Verbrennungsmotor mit externer Verbrennung, beispielsweise einen Stirlingmotor, oder um einen thermoakustischen Generator handeln. In diesen Fällen weist die Wärmekraftmaschine eine Wärmesenke auf, die von einem Brennersystem zu beheizen ist. The invention relates to a burner system for a cogeneration system with external combustion. Combined heat and power systems are used to simultaneously heat buildings and generate electricity. They can be constructed from a heat engine that drives a generator to generate electricity. The waste heat of the heat engine is used for heating purposes. The heat engine may be an external combustion engine, such as a Stirling engine, or a thermoacoustic generator. In these cases, the heat engine has a heat sink to be heated by a burner system.
Insbesondere in den Fällen, in denen Abwärme oder Restwärme des Kraft-Wärme-Kopplungssystem sich genutzt wird, um die Luft vor der Verbrennung vorzuwärmen, können sehr hohe Temperaturen im Wärmeübertrager, der die Wärme des Brenners auf die Wärmekraftmaschine überträgt, auftreten. Dies führt zu einer hohen thermischen Belastung des Wärmeübertragers. Ein weiteres Problem ist, dass aufgrund des großen Temperaturgefälles im Wärmeübertrager thermisch bedingte Spannungen im Wärmeübertrager auftreten. Es hat sich gezeigt, dass eine Erhöhung der Luftzahl, beispielsweise λ = 1,8, dieses Problem nicht wesentlich verbessert. In particular, in the cases where waste heat or residual heat of the combined heat and power system is used to preheat the air prior to combustion, very high temperatures in the heat exchanger, which transmits the heat of the burner to the heat engine occur. This leads to a high thermal load of the heat exchanger. Another problem is that thermally induced stresses in the heat exchanger occur due to the large temperature gradient in the heat exchanger. It has been found that increasing the air ratio, for example λ = 1.8, does not significantly improve this problem.
Es ist daher Aufgabe der Erfindung, ein Brennersystem für ein Kraft-Wärme-Kopplungssystem mit externer Verbrennung bereitzustellen, bei dem die Temperatur im Wärmeübertrager verringert wird.It is therefore an object of the invention to provide a burner system for a cogeneration system with external combustion, in which the temperature is reduced in the heat exchanger.
Dies erfolgt erfindungsgemäß durch ein Brennersystem gemäß dem unabhängigen Anspruch. Dabei wird ein Teil des aus dem Wärmeübertrager austretenden Abgases, welches im Wärmeübertrager abgekühlt wurde, zurückgeführt und dem in den Wärmeübertrager eintretenden Abgas zugemischt. Der Vorteil ist, dass das in den Wärmeübertrager eintretende Gas eine geringere Temperatur aufweist. Dadurch ist der Wärmeübertrager einer geringeren thermischen Belastung ausgesetzt. Zugleich wird der Massenstrom des durch den Wärmeübertrager strömenden Gases erhöht. Die Temperaturdifferenz zwischen Wärmeübertrager-Eingang und Wärmeübertrager-Ausgang wird verringert, so dass die thermisch bedingten Materialspannungen geringer sind.This is done according to the invention by a burner system according to the independent claim. In this case, part of the exiting from the heat exchanger exhaust gas, which was cooled in the heat exchanger, returned and added to the entering into the heat exchanger exhaust gas. The advantage is that the gas entering the heat exchanger has a lower temperature. As a result, the heat exchanger is exposed to a lower thermal load. At the same time, the mass flow of the gas flowing through the heat exchanger is increased. The temperature difference between the heat exchanger input and heat exchanger output is reduced, so that the thermally induced material stresses are lower.
In einer vorteilhaften Ausgestaltung der Erfindung verfolgt die zur Mischung des zurückgeführten Abgases in einer Venturidüse. Dazu wird das vom Brenner zum Wärmeübertrager geführte Abgas durch die Venturidüse geleitet und das zurückzuführende abgekühlte Abgas am Unterdruck-Anschluss der Venturidüse zugeführt.In an advantageous embodiment of the invention, the pursues for mixing the recirculated exhaust gas in a venturi. For this purpose, the guided from the burner to the heat exchanger exhaust gas is passed through the Venturi nozzle and supplied to be returned cooled exhaust gas at the negative pressure port of the venturi.
Die Erfindung wird nun anhand der Figur detailliert erläutert. In
In dem hier dargestellten Ausführungsbeispiel ist das Gebläse auf der Luftseite vorgesehen. Erfindungsgemäß kann ebenso das Gebläse auf der Abgasseite als so Gebläse ausgeführt sein. Ebenfalls ist eine Gas-Luft-Mischvorrichtung
Stromab des Brenners
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Gebläse fan
- 22
- Gaszufuhr gas supply
- 33
- Verbrennungsluft-Vorwärmer Combustion air preheater
- 44
- Gasarmatur gas train
- 55
- Gas-Luft-Mischvorrichtung Gas-air mixing device
- 66
- Brenner burner
- 77
- Wärmeübertrager Heat exchanger
- 88th
- Wärmekraftmaschine Heat engine
- 99
- Abgas-Zumischung Exhaust admixture
- 1010
- Wärmeübertrager-Eingang Heat exchanger input
- 1111
- Wärmeübertrager-Ausgang Heat exchanger output
- 1212
- Abgasrückführung Exhaust gas recirculation
- 1313
- Erster Abgas-Wärmetauscher First exhaust gas heat exchanger
- 1414
- Zweiter Abgas-Wärmetauscher Second exhaust gas heat exchanger
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014224098.0A DE102014224098A1 (en) | 2014-11-26 | 2014-11-26 | Burner system for a combined heat and power system with external combustion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014224098.0A DE102014224098A1 (en) | 2014-11-26 | 2014-11-26 | Burner system for a combined heat and power system with external combustion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102014224098A1 true DE102014224098A1 (en) | 2016-06-02 |
Family
ID=55968248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102014224098.0A Withdrawn DE102014224098A1 (en) | 2014-11-26 | 2014-11-26 | Burner system for a combined heat and power system with external combustion |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102014224098A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011103873A2 (en) * | 2010-02-24 | 2011-09-01 | Invensor Gmbh | Heating and/or cooling system |
DE112011102672T5 (en) * | 2010-08-09 | 2013-06-06 | Cummins Intellectual Properties, Inc. | Waste heat recovery system for capturing energy after engine aftertreatment systems |
DE102013017566A1 (en) * | 2013-10-22 | 2015-04-23 | Linde Aktiengesellschaft | Use of a wound heat exchanger for generating superheated steam from combustion or exhaust gases in heating systems or combustion engines |
-
2014
- 2014-11-26 DE DE102014224098.0A patent/DE102014224098A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011103873A2 (en) * | 2010-02-24 | 2011-09-01 | Invensor Gmbh | Heating and/or cooling system |
DE112011102672T5 (en) * | 2010-08-09 | 2013-06-06 | Cummins Intellectual Properties, Inc. | Waste heat recovery system for capturing energy after engine aftertreatment systems |
DE102013017566A1 (en) * | 2013-10-22 | 2015-04-23 | Linde Aktiengesellschaft | Use of a wound heat exchanger for generating superheated steam from combustion or exhaust gases in heating systems or combustion engines |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |