KR101191585B1 - Cover assembly for forming exhaust gas flow passage of supplementary boiler in micro combined heat and power unit - Google Patents
Cover assembly for forming exhaust gas flow passage of supplementary boiler in micro combined heat and power unit Download PDFInfo
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- KR101191585B1 KR101191585B1 KR1020100079467A KR20100079467A KR101191585B1 KR 101191585 B1 KR101191585 B1 KR 101191585B1 KR 1020100079467 A KR1020100079467 A KR 1020100079467A KR 20100079467 A KR20100079467 A KR 20100079467A KR 101191585 B1 KR101191585 B1 KR 101191585B1
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- heat exchanger
- flow path
- latent heat
- cover
- exhaust gas
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
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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)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
The present invention relates to a cover assembly for forming an auxiliary boiler exhaust flow path of a small cogeneration machine, comprising: a Stirling engine that is heated by an engine burner to produce electricity, and is installed on the Stirling engine and provided with a sensible heat exchanger and a latent heat exchanger. In a small cogeneration generator including an auxiliary boiler producing; A flow path connecting the latent heat heat exchanger and an engine head through which the exhaust gas heating the Stirling engine is discharged is formed, wherein the flow path is configured to exchange heat while the discharged exhaust gas flows from the upper portion to the lower portion of the latent heat exchanger; The flow path provides a cover assembly for forming the auxiliary boiler exhaust flow path of the small cogeneration generator, characterized in that formed integrally on the inner surface of the cover on which the latent heat exchanger is installed.
According to the present invention, when the flow path is formed to recover the high heat contained in the exhaust gas by passing the exhaust gas of the Stirling engine to the latent heat exchanger of the auxiliary boiler, the flow path is integrally formed in the cover, so that the potential of condensed water is not suppressed. Corrosion can be effectively prevented.
Description
The present invention relates to a cover assembly for forming an auxiliary boiler exhaust flow path of a small cogeneration machine, and more particularly, to form a guide flow path for exhaust gas discharged from a Stirling engine of a small cogeneration generator to be discharged through a latent heat exchanger of an auxiliary boiler. A cover assembly for forming an auxiliary boiler exhaust flow path of a cogeneration generator.
Recently, with increasing interest in the discovery of new energy sources, the importance of recovering and reusing the latent heat of medium and low temperature exhaust gas or cooling water, which can be generated in almost all fields of the industry, is increasing.
The organic Rankine cycle is mainly applied to convert low temperature heat energy to high energy energy.
Such an organic Rankine cycle is a form of power cycle that makes it possible to obtain a shaft force with relatively high thermal efficiency even under low temperature heat source conditions by using an organic heating medium having a higher vapor pressure than water as a working fluid.
For example, known organic Rankine cycles correlate independent components such as circulating pumps, turbines, condensers and evaporators, where the working fluid evaporates in the evaporator and then expands in the turbine, generating axial force and then again in the condenser. It consists of a closed circulation cycle that is liquefied and then fed back to the evaporator by a pump.
However, the known organic Rankine system has a disadvantage that the start and stop is not easy at present because the configuration of the device is complicated, a large amount of organic heat medium is required, and precise control of each element device is required. come.
On the other hand, there is a stirling engine, which is a very simple and easy to operate device because each component of the power cycle is assembled into one engine and uses a gas such as air as a working fluid. Provide an advantage.
Moreover, since such a Stirling engine has the highest thermal efficiency during the power cycle, the use of the Stirling engine to convert low to low temperature thermal energy into power allows for the conversion of high efficiency energy while having a very simple structure compared to conventional organic Rankine systems. Provide an advantage.
Recently, Micro CHP (Combined Heat and Power), which is a power generation method for simultaneously producing electricity and heat at home, has been disclosed. For example, Korean Patent Application Publication No. 2006-0013391.
At this time, the small cogeneration generator of the power generation method may be regarded as a kind of household boiler equipment configured to produce electricity through a Stirling engine and a secondary boiler, and produce hot water for heating through the auxiliary boiler.
However, in the small cogeneration system having such a structure, since the exhaust gas generated during combustion of the engine burner that supplies heat to the Stirling engine is immediately discharged to the atmosphere, there was energy waste due to the exhaust gas containing high heat. In addition, there is a problem that it is difficult to reduce the generation of NOx because it is discharged immediately in a high temperature state.
In order to improve this, an attempt has been made by the applicant to direct the engine exhaust gas to the latent heat exchanger to heat exchange it and then discharge it to the atmosphere.
For example, as shown in FIG. 1, the
In addition, the material was used by combining aluminum and stainless steel.
However, as a result of the condensate generation of the auxiliary boiler, as shown in FIG. 2, a potential corrosion (A, accelerated when using heterogeneous materials and electricity is applied to the condensate) occurred, and this potential corrosion was caused to occur inside the product by the capillary phenomenon. The problem of rapid propagation has been derived.
In this case, condensing boilers are advantageous because condensation (condensation occurs during cooling down as the engine starts and stops repeatedly) is advantageous because the efficiency of the boiler rises, but potential corrosion caused by condensate shortens product life.
Therefore, the sealing member may be replaced with aluminum, but even in this case, it is difficult to avoid deterioration of the internal insulation due to the capillary phenomenon, and it is necessary to use a sealing material made of a special material that can withstand insulation and high temperature. Joining bolts also have to be replaced by insulated bolts rather than ordinary stainless bolts, which increases the cost.
The present invention has been made in view of the above-described problems in the prior art, and the exhaust gas generated when the Stirling engine is driven in a small cogeneration generator including a Stirling engine and an auxiliary boiler is sufficiently heat exchanged through a latent heat exchanger. Provides a cover assembly for forming an auxiliary boiler exhaust path of a small cogeneration generator that effectively prevents potential corrosion without integrating condensate by integrating the flow path itself into a cover when forming a flow path leading to discharge to the atmosphere afterwards. Has its main purpose.
The present invention is a means for achieving the above object, including a Stirling engine heated by an engine burner to produce electricity, and an auxiliary boiler installed on top of the Stirling engine and having a sensible heat exchanger and a latent heat exchanger to produce hot water In a small cogeneration machine; A flow path connecting the latent heat heat exchanger and an engine head through which the exhaust gas heating the Stirling engine is discharged is formed, wherein the flow path is configured to exchange heat while the discharged exhaust gas flows from the upper portion to the lower portion of the latent heat exchanger; The flow path provides a cover assembly for forming the auxiliary boiler exhaust flow path of the small cogeneration generator, characterized in that formed integrally on the inner surface of the cover on which the latent heat exchanger is installed.
In this case, the cover including the flow path is also characterized by being formed of a ceramic insulating material.
In addition, the exhaust gas inlet portion, which is the lower end of the flow path is characterized in that the inclined upward.
According to the present invention, when the flow path is formed to recover the high heat contained in the exhaust gas by passing the exhaust gas of the Stirling engine to the latent heat exchanger of the auxiliary boiler, the flow path is integrally formed in the cover, so that the potential of condensed water is not suppressed. Corrosion can be effectively prevented.
1 is a partially exploded perspective view showing a conventional example of a cover constituting the exhaust flow path of the auxiliary boiler according to the present invention.
FIG. 2 is a view schematically showing an example in which dislocation corrosion A is generated in the example of FIG. 1.
Figure 3 is a schematic diagram showing the exhaust gas of the Stirling engine exhaust gas of the small cogeneration generator according to the present invention.
4 is an exemplary perspective view showing an auxiliary boiler of a small cogeneration generator according to the present invention.
5 and 6 are front and main sectional views showing the exhaust flow path of the auxiliary boiler according to the present invention.
7 is a view comparing the cover according to the present invention and the conventional cover.
8 is a view showing a front, rear and cover installation example of the cover according to the present invention.
FIG. 9 is a view partially illustrating a state when a cover according to the present invention is assembled to a latent heat exchanger. FIG.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIGS. 3 to 6, the small cogeneration generator according to the present invention includes a
In this case, the Stirling
In addition, the
In this case, the
On the other hand, the
In addition, a front portion of the
At this time, a hole (not shown) is formed in the lower surface of the
In this case, the
In particular, the present invention is characterized in that the flow path for guiding the exhaust gas discharged through the upper end of the
That is, as shown in FIGS. 7 to 8, the
Therefore, the wall surfaces forming the
Preferably, the wall surface constituting the
In addition, in order to smooth the flow of the exhaust gas, reduce the heat loss, and to suppress the rise of the condensate temperature while increasing the condensation conditions of the exhaust gas to increase the thickness of the
In addition, the
Then, as illustrated in FIG. 9, the exhaust gas induced toward the upper end of the
The present invention having such a configuration has the following operational relationship.
A small cogeneration generator according to the present invention is operated using gas as a heat source to produce electricity and hot water.
That is, a part of the gas produces electricity by heating the
In this process, the exhaust gas generated when the
Subsequently, since the flow path is opened so as to be in contact with the
As described above, the
In addition, in the present invention, since the material constituting the
In other words, rather than suppressing the condensate generation itself related to the latent heat exchange efficiency of the condensate of the auxiliary boiler, the potential corrosion itself is prevented by the condensate regardless of the condensate generation, and the exhaust gas is discharged through the latent heat exchanger smoothly. It is expected to contribute to efficiency improvement.
100: housing 110: Stirling engine
120: engine burner 130: cooling water pipe
200: auxiliary boiler 210: sensible heat exchanger
220: latent heat exchanger 230: case
240: cover 242: sealing wall
246: Euro 248: cover
250: communication tube 290: discharge passage
Claims (3)
The latent heat exchanger 220 is installed at the lower portion of the sensible heat exchanger 210 and discharged after the latent heat exchanger passes through a heat exchange passage formed in the latent heat exchanger from the upper portion to the lower portion. It is made to be discharged through the flow path 290, and is connected to the Stirling engine 110 and the communication tube 250 from the top of the Stirling engine 100 is formed to integrate the exhaust gas heating the Stirling engine 110 The flow path 246 formed through an inner passage between the cover 240 and the sealing wall 242 and the cover 248 covered by the cover 240, and then flows over the latent heat exchanger. Is formed to be discharged through the discharge passage 290 while passing through the heat exchange passage from the top to the bottom,
The hot water heated through the Stirling engine 110 to cool the Stirling engine 110 and sequentially through the heat exchange passage and the sensible heat exchanger 210 of the latent heat exchanger 220 through which the exhaust gas flows. Is configured to be stored in the storage tank 300,
The flow passage is a cover assembly for forming the auxiliary boiler exhaust flow path of the small cogeneration generator, characterized in that formed integrally on the inner surface of the cover is installed the latent heat exchanger,
The cover 240,
Cover assembly for forming the auxiliary boiler exhaust flow path of the small cogeneration generator, characterized in that formed of a ceramic insulation,
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100079467A KR101191585B1 (en) | 2010-08-17 | 2010-08-17 | Cover assembly for forming exhaust gas flow passage of supplementary boiler in micro combined heat and power unit |
RU2011118723/06A RU2473847C1 (en) | 2010-08-17 | 2011-02-07 | Minor cogenerator secondary boiler discharge device and assembly of casing making minor cogenerator secondary boiler discharge channel |
AU2011202483A AU2011202483B2 (en) | 2010-08-17 | 2011-02-07 | Exhaust structure of sub-boiler of small cogenerator and cover assembly for exhaust channel of sub-boiler of small cogenerator |
PCT/KR2011/000769 WO2012023678A1 (en) | 2010-08-17 | 2011-02-07 | Auxiliary boiler exhaust structure for a micro combined heat and power unit, and a cover assembly for forming an auxiliary boiler exhaust flow path for a micro combined heat and power unit |
NZ592799A NZ592799A (en) | 2010-08-17 | 2011-05-11 | Exhaust structure of sub-boiler of small cogenerator and cover assembly for exhaust channel of sub-boiler of small cogenerator |
EP11003946.8A EP2420756B1 (en) | 2010-08-17 | 2011-05-12 | Exhaust structure of sub-boiler of small cogenerator and cover assembly for exhaust channel of sub-boiler of small cogenerator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100079467A KR101191585B1 (en) | 2010-08-17 | 2010-08-17 | Cover assembly for forming exhaust gas flow passage of supplementary boiler in micro combined heat and power unit |
Publications (2)
Publication Number | Publication Date |
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KR20120016930A KR20120016930A (en) | 2012-02-27 |
KR101191585B1 true KR101191585B1 (en) | 2012-10-15 |
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KR1020100079467A KR101191585B1 (en) | 2010-08-17 | 2010-08-17 | Cover assembly for forming exhaust gas flow passage of supplementary boiler in micro combined heat and power unit |
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Families Citing this family (1)
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KR20160001926A (en) | 2014-06-27 | 2016-01-07 | 주식회사 경동나비엔 | Cover assembly for forming mixing gas flow passage of supplementary boiler in micro combined heat and power unit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100579560B1 (en) | 2004-12-10 | 2006-05-15 | 엘지전자 주식회사 | Exhaust gas heat exchanger for cogeneration system |
JP2008175151A (en) | 2007-01-19 | 2008-07-31 | Chugoku Electric Power Co Inc:The | Cogeneration system using cold of liquefied gas and method for operating same |
JP2008223622A (en) | 2007-03-13 | 2008-09-25 | Sakushiyon Gas Kikan Seisakusho:Kk | Thermal engine |
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2010
- 2010-08-17 KR KR1020100079467A patent/KR101191585B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100579560B1 (en) | 2004-12-10 | 2006-05-15 | 엘지전자 주식회사 | Exhaust gas heat exchanger for cogeneration system |
JP2008175151A (en) | 2007-01-19 | 2008-07-31 | Chugoku Electric Power Co Inc:The | Cogeneration system using cold of liquefied gas and method for operating same |
JP2008223622A (en) | 2007-03-13 | 2008-09-25 | Sakushiyon Gas Kikan Seisakusho:Kk | Thermal engine |
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