CN111878224B - Evaporation heat exchanger for recycling surface heat radiation of component and household miniature cogeneration device - Google Patents
Evaporation heat exchanger for recycling surface heat radiation of component and household miniature cogeneration device Download PDFInfo
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- CN111878224B CN111878224B CN202010607237.1A CN202010607237A CN111878224B CN 111878224 B CN111878224 B CN 111878224B CN 202010607237 A CN202010607237 A CN 202010607237A CN 111878224 B CN111878224 B CN 111878224B
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- 230000008020 evaporation Effects 0.000 title claims abstract description 58
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- 238000004064 recycling Methods 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000010248 power generation Methods 0.000 claims abstract description 35
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 11
- 239000003546 flue gas Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 abstract description 3
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- 238000001816 cooling Methods 0.000 description 5
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/041—Details of condensers of evaporative condensers
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to an evaporation heat exchanger for recovering surface heat radiation of a component and a household micro combined heat and power generation device, wherein the evaporation heat exchanger is used for recovering the surface heat radiation of the component in the household micro combined heat and power generation device and is arranged in a closed box body of the household micro combined heat and power generation device, the evaporation heat exchanger comprises an evaporation section and a condensation section, the evaporation section is provided with a fluid channel which is mutually communicated, a working medium for absorbing the surface heat radiation of the component is filled in the fluid channel, the condensation section is arranged on a water return pipeline of the household micro combined heat and power generation device, and the evaporation section is communicated with the condensation section through a working medium exchange pipeline. Compared with the prior art, the evaporative heat exchanger is used for recovering the surface heat dissipation of the components in the household micro combined heat and power generation device, thereby increasing the recovered heat and avoiding the problems of power generation capacity attenuation and energy efficiency reduction caused by the fact that the air intake of a prime motor is used as a cooling medium.
Description
Technical Field
The invention relates to an evaporation heat exchanger and a household micro cogeneration device, in particular to an evaporation heat exchanger and a household micro cogeneration device for recycling the surface heat of a component.
Background
The Distributed Energy System (DEC) is an Energy cogeneration comprehensive utilization System with multi-input and multi-output capabilities, is based on the concept of Energy cascade utilization, integrates power generation, heat supply, and refrigeration, and has obvious advantages compared with the conventional centralized Energy System. The Combined Heat and Power (CHP) system is one of the most typical, most active, and most practical forms of energy in distributed energy, and its application originally originated in the united states of the 80's of the 19 th century. The CHP system fully realizes the utilization of different grades of energy sources, and the application principle lies in 'temperature mouth-to-mouth and step utilization', the CHP system arranges a power generation system at a user side in a small-scale and dispersed form, high-temperature and high-pressure gas is generated by burning fuel in a generator set and pushes a prime mover to do work to generate high-grade electric energy, and medium-high temperature flue gas after the work is done meets the requirements of heating (cooling) and hot water supply of the user after waste heat recovery.
Compared with the traditional separate supply system, the combined heat and power system has great advantages in various aspects such as energy utilization, environmental protection, economic investment and the like:
1. the energy utilization efficiency is high:
the combined heat and power system effectively unifies the high-grade electric energy demand and the low-grade heat (cold) demand, realizes the cascade utilization of energy, so the comprehensive utilization efficiency of the energy is as high as 70-80%, wherein the total efficiency of the Micro combined heat and power system (Micro-CHP) can even reach more than 90%.
2. Less pollutant discharge and environmental protection:
the environmental protection advantages of the cogeneration system are mainly reflected in two aspects, namely the use of clean fuel and the reduction of the emission of atmospheric pollutants. The CHP system using clean fuel can greatly reduce the emission of harmful substances, and meanwhile, the high efficiency of the CHP system also contributes to the reduction of environmental pollution. According to statistics, compared with the traditional thermal coal-fired power generation, the emission of sulfur dioxide SO2, sewage, solid waste and the like in the CHP system is almost 0, the emission of total suspended particulate matters (TSP) is reduced by 95%, the emission of nitrogen oxides (NOx) is reduced by 80%, and the emission of carbon dioxide (CO2) is reduced by more than 40%. Thus, the CHP system is an environmentally friendly energy technology in a sense.
3. Peak clipping and valley filling, and relieving the pressure of the power grid:
the increasing social and economic level makes people demand higher and higher for the comfort level of life, and along with the increase of electrical appliances in buildings and the popularization of air conditioners, the building energy consumption not only increases rapidly in numerical value, but also has obvious seasonal characteristics. The traditional sub-supply system usually adopts an electric drive air conditioner to heat (refrigerate) or adopts winter central heating, which brings great burden to the urban power grid and the heat supply pipe network, and especially in winter and summer, the sudden increase of energy demand brings huge pressure to the urban energy supply system. When the electric load is very large, the phenomenon of switching off and limiting the electricity even occurs because the bearing capacity of the urban power grid is limited, which hinders the development of social economy and influences the normal life and production of people. The appearance of the cogeneration system can reduce the peak value of power from two aspects, one is the power generation function of the cogeneration system, and the other is to utilize waste heat to meet the heat (cold) demand to replace electric heating (cooling). Therefore, the CHP system dispersed in the urban load center can effectively relieve the power supply pressure of the power grid during the power peak, balance the power load of the power grid and play the role of 'peak clipping and valley filling'.
4. The system has high energy supply reliability and strong safety:
the traditional separate supply system is in a single-input single-output supply mode, namely the electric load is met by a power grid, and the cold load is met by a cold load
The electric network drives the electric refrigerator to meet, and the heat load is met by a coal or gas fired boiler. In case of power grid failure or unexpected disaster (such as storm, earthquake, human damage, etc.), the energy supply is cut off. The combined heat and power system is usually provided with multi-element input and multi-element output, the electric energy supply can be simultaneously borne by a prime motor and an electric network, the cold energy supply can be simultaneously borne by an electric refrigerator and an absorption refrigerator, and the heat energy supply can be simultaneously borne by a waste heat device and a gas boiler. It can be seen that in the CHP system, each energy supply branch has a multi-path guarantee, and the reliability of energy supply is greatly improved.
For large-scale, medium-and-small-sized cogeneration systems, foreign technologies and markets are mature, and domestic applications are more and more; however, for Micro combined heat and power (Micro-CHP) systems, developed countries invest a lot of funds to research and develop in recent years, a few enterprises with leading technologies have already introduced their own Micro-CHP brands, and no related application examples exist in China. Currently, international Micro-CHP products mostly adopt an internal combustion engine, an external combustion engine or a fuel cell as a power source, wherein the representative models based on the internal combustion engine are Honda Ecowell (1kWe), Remeha R-Gen (SenerTec Dachs) (5.5kWe), Vaillent Ecoper (4.7kWe) and the like, the representative models based on the external combustion engine are Whispertech Whispergen (1kWe), Worcester Bosch Greenstar (1kWe) and the like, and the representative model based on the fuel cell is Panasonic ENE-FARM (0.7 kWe).
The household combined heat and power device adopts a gas engine to drive a generator to generate electricity, waste heat provides hot water for residential life and heating requirements, and the household combined heat and power device has the advantages of high comprehensive energy efficiency, good power supply safety, environmental protection, energy conservation and the like, and is widely applied abroad. The power generation power of a common household combined heat and power unit is 1-5 kWe, and the most common prime movers of the power level are an internal combustion engine, an external combustion engine (Stirling engine) and a fuel cell respectively. Despite the development of two to thirty years, the manufacturers of domestic combined heat and power units supplied in global markets are rare, and related products are not sold in China.
Miniature cogeneration units of the domestic type typically integrate the cogeneration core components within a compact enclosure, typically including components such as a prime mover, a generator, a heat exchanger, etc. These components emit a large amount of heat during operation; meanwhile, as the household cogeneration device is close to the end user, the noise control requirement is strict, so that the periphery of the device is surrounded by sound insulation boards made of thick silencing materials, and the heat dissipation condition is poor. If the temperature in the box body is too high, the core components cannot work normally. Therefore, a reasonable solution is needed to be designed, namely, the temperature in the box body is controlled to be lower than a proper temperature, and the device is ensured to work efficiently and stably to meet the heat and electricity requirements of users.
The temperature control method of the existing household cogeneration device is that air is guided into a box body from the outside by driving a ventilation fan, one part of the air is used for oxidation and combustion of a prime motor, and the other part of the air is discharged after heat dissipation of an absorption part. This results in the case having to be provided with air inlet and outlet holes with large areas, which is not only disadvantageous for noise control, but also increases the power consumption, noise and investment cost of the fan, and at the same time, the intake air is heated, which results in the power generation capacity of the prime mover being reduced and the efficiency being reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an evaporative heat exchanger for recovering the surface heat dissipation of parts and a household micro cogeneration device.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a retrieve radiating evaporation heat exchanger in part surface, this evaporation heat exchanger is arranged in the radiating recovery in part surface of domestic miniature combined heat and power generation device, evaporation heat exchanger set up in the closed box of domestic miniature combined heat and power generation device, evaporation heat exchanger include evaporation zone and condensation segment, the evaporation zone on have the fluid passage of interconnection, fluid passage in fill and be used for absorbing the radiating working medium in part surface, the condensation segment set up on domestic miniature combined heat and power generation device's return water pipeline, evaporation zone and condensation segment between through working medium exchange pipeline intercommunication.
Preferably, the condensation section is arranged above the evaporation section, and the inlet installation height of the working medium exchange pipeline is higher than the outlet installation height.
Preferably, the surface of the evaporation section is plate-shaped.
Preferably, the size of the evaporation section is matched with that of a closed box body of the household micro combined heat and power device, and the evaporation section is arranged behind the closed box body to divide the closed box body into two parts which are respectively used for installing an electric control component and a power component of the household micro combined heat and power device.
Preferably, the fluid channel is in a grid shape.
Preferably, the condensation section comprises any one of a double pipe heat exchanger and a plate heat exchanger.
The household miniature combined heat and power generation device comprises a closed box body, an electric control part and a power part, wherein the electric control part and the power part are arranged in the closed box body, the electric control part is connected with the power part, the device also comprises the evaporation heat exchanger, the evaporation heat exchanger is arranged in the closed box body to divide the closed box body into two cavities, and the electric control part and the power part are respectively arranged in the two cavities.
Preferably, the power part comprises a return water preheater, a cylinder sleeve water heat exchanger, a prime motor, a flue gas heat exchanger and a generator, the return water preheater, the cylinder sleeve water heat exchanger, the prime motor and the flue gas heat exchanger are sequentially connected to form a hot water supply loop, and the prime motor is further connected with the generator to form a power generation circuit.
Preferably, the electric control component comprises an electric controller for controlling the operation of each sub-component in the hot water supply loop and a grid-connected controller for grid connection of the power generation line.
Preferably, the prime mover comprises one of an internal combustion engine, a stirling engine and a fuel cell, and the generator comprises one of a permanent magnet generator or an asynchronous induction generator.
Compared with the prior art, the invention has the following advantages:
(1) the evaporative heat exchanger is used for recovering the surface heat dissipation of components in a household micro cogeneration device, not only increases the recovered heat, but also avoids the problems of power generation capacity attenuation and energy efficiency reduction caused by the fact that the air intake of a prime motor is used as a cooling medium, and the evaporative heat exchanger is an advantage which is not possessed by the existing foreign household cogeneration device;
(2) the household miniature cogeneration device does not need a large amount of cooling air, the air inlet pipe is directly led into the air inlet pipe of the prime motor after silencing, the noise of the unit is favorably controlled, and meanwhile, the evaporation heat exchanger works by means of gravity drive without special driving devices, so that the energy is saved and the efficiency is high.
Drawings
FIG. 1 is a schematic mechanical diagram of an evaporative heat exchanger with a recovery component for dissipating heat from the surface thereof according to the present invention;
FIG. 2 is a schematic structural view of a household micro cogeneration unit of the present invention;
in the figure, 1 is an evaporation heat exchanger, 11 is an evaporation section, 12 is a condensation section, 13 is a fluid channel, 14 is a water return pipeline, 15 is a working medium exchange pipeline, 2 is a household micro cogeneration device, 21 is a closed box body, 22 is a water return preheater, 23 is a cylinder liner water heat exchanger, 24 is a prime motor, 25 is a flue gas heat exchanger, 26 is a generator, and 27 is an electric control and grid-connected cabin.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.
Examples
As shown in fig. 1, an evaporation heat exchanger 1 for recovering surface heat radiation of a component, the evaporation heat exchanger 1 is used for recovering surface heat radiation of the component in a household micro combined heat and power generation device 2, the evaporation heat exchanger 1 is arranged in a closed box 21 of the household micro combined heat and power generation device 2, the evaporation heat exchanger 1 comprises an evaporation section 11 and a condensation section 12, the evaporation section 11 is provided with a fluid channel 13 which is mutually communicated, the fluid channel 13 is filled with a working medium for absorbing surface heat radiation of the component, the condensation section 12 is arranged on a water return pipeline 14 of the household micro combined heat and power generation device 2, and the evaporation section 11 is communicated with the condensation section 12 through a working medium exchange pipeline 15.
The condensation section 12 is arranged above the evaporation section 11, and the inlet installation height of the working medium exchange pipeline 15 is higher than the outlet installation height, so that the recovery of the working medium in an original state is realized by utilizing the action of gravity, a special driving device is not needed, and the energy conservation and the high efficiency are realized.
The surface of the evaporation section 11 is plate-shaped, can be in the shape of a flat plate, an arc, a flat plate bent shape and the like which are suitable for being arranged in the box body, and absorbs heat emitted to the air by means of natural convection. The size of the evaporation section 11 is matched with that of a closed box body 21 of the household micro combined heat and power device 2, and the evaporation section 11 is arranged behind the closed box body 21 to divide the closed box body 21 into two parts which are respectively used for installing an electric control component and a power component of the household micro combined heat and power device 2.
The fluid channels 13 are in a grid shape, and all the fluid channels 13 are gathered at a certain position of the edge, so that the heat exchange effect is improved.
The condensation section 12 includes any one of a double pipe heat exchanger and a plate heat exchanger.
The specific working principle of the evaporative heat exchanger 1 with the surface heat radiation of the recovery part is as follows:
according to the illustration in fig. 1, the shadow part of the evaporation section 11 is a fluid channel 13 filled with working medium, and the working medium is boiled and gasified after absorbing heat from the surface in the fluid channel 13 by adopting the working principle similar to a heat pipe, and enters the condensation section 12 through a working medium exchange pipeline 15. In the condensation section 12, the gaseous working medium exchanges heat with the heat supply return water of the micro cogeneration device, and the gaseous working medium is condensed into liquid. The liquid flows back to the evaporation heat exchange section through the working medium exchange pipeline 15 under the action of gravity, the whole cycle is continuously reciprocated, so that the heat of the environment space absorbed by the evaporation heat exchanger 1 is continuously exchanged to the return water of the micro cogeneration device, and the return water is preheated.
As shown in fig. 2, a household micro cogeneration device 2 comprises a closed box 21, and an electric control component and a power component arranged in the closed box 21, wherein the electric control component is connected with the power component, the device further comprises the heat exchanger, the heat exchanger is arranged in the closed box 21 to divide the closed box 21 into two cavities, and the electric control component and the power component are respectively arranged in the two cavities.
The power part comprises a return water preheater 22, a cylinder sleeve water heat exchanger 23, a prime mover 24, a flue gas heat exchanger 25 and a generator 26, the return water preheater 22, the cylinder sleeve water heat exchanger 23, the prime mover 24 and the flue gas heat exchanger 25 are sequentially connected to form a hot water supply loop, and the prime mover 24 is further connected with the generator 26 to form a power generation circuit.
The electric control component comprises an electric controller for controlling the operation of each sub-component in the hot water supply loop and a grid-connected controller for power generation line grid connection, the electric control component is arranged in an electric control grid-connected cabin 27 shown in fig. 2, the other side of the evaporative heat exchanger 1 is a main cabin, and a power component is arranged in the main cabin.
The prime mover 24 comprises one of an internal combustion engine, a stirling engine, and a fuel cell, and the generator 26 comprises one of a permanent magnet generator 26 or an asynchronous induction generator 26.
The prime mover 24 of the micro cogeneration unit of this embodiment is in the form of an internal combustion engine which draws air and gas to burn and apply work to drive the generator 26 to generate electricity, which is modulated by a grid-connected controller located in an electrically controlled and grid-connected cabin 27 and then is connected to the grid. When the internal combustion engine performs combustion work, part of heat is transferred to hot water for cooling the wall surface of the cylinder through the cylinder liner water heat exchanger 23; the exhausted flue gas is exhausted out of the atmosphere after waste heat is recovered by a flue gas heat exchanger 25. The flat plate-shaped evaporation heat exchanger 1 is arranged in the closed box body 21 of the household micro combined heat and power generation device 2 and is used as a partition board for separating the main cabin from the electric control and grid-connected cabin 27, so that the evaporation heat exchanger 1 can form a favorable condition of double-side heat absorption, and absorbs space heat in a natural convection mode. The evaporation heat exchanger 1 is a fluid channel 13 filled with working medium and provided with a latticed cavity, the working principle similar to that of a heat pipe is adopted, the working medium is boiled and gasified after absorbing heat from the surface in the fluid channel 13, and enters a return water preheater 22 through a working medium exchange pipeline 15. In the return water preheater 22, the gaseous working medium exchanges heat with the heat supply return water of the household micro cogeneration device 2, and the gaseous working medium is condensed into liquid. The liquid flows back to the heat exchanger of the evaporation section 11 through the working medium exchange pipeline 15 under the action of gravity, the whole cycle is continuously repeated, so that the heat of the environment space absorbed by the evaporation heat exchanger 1 is continuously exchanged to the return water of the micro cogeneration device, and the return water is preheated. The heat supply backwater of the micro cogeneration device is heated by a backwater preheater 22, a cylinder sleeve water heat exchanger 23 and a flue gas heat exchanger 25 and then is used as hot water supply to be provided for heat-using end equipment.
The evaporative heat exchanger 1 is used for recovering the surface heat dissipation of the components in the household micro combined heat and power generation device 2, not only increases the recovered heat, but also avoids the problems of power generation capacity attenuation and energy efficiency reduction caused by the fact that the air intake of a prime motor 24 is used as a cooling medium, and the evaporative heat exchanger is an advantage which is not possessed by the existing foreign household combined heat and power generation devices. Meanwhile, the household micro cogeneration device 2 does not need a large amount of cooling air, the air inlet pipe is directly led into the air inlet pipe of the prime motor 24 after silencing, the noise of the unit is favorably controlled, and meanwhile, the evaporation heat exchanger 1 works by means of gravity driving without special driving devices, so that the energy is saved and the efficiency is high.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (9)
1. An evaporation heat exchanger for recycling surface heat radiation of components is characterized in that the evaporation heat exchanger (1) is used for recycling the surface heat radiation of the components in a household micro combined heat and power generation device (2), the evaporation heat exchanger (1) is arranged in a closed box body (21) of the household micro combined heat and power generation device (2), the evaporation heat exchanger (1) comprises an evaporation section (11) and a condensation section (12), the evaporation section (11) is provided with a fluid channel (13) which is mutually communicated, the fluid channel (13) is filled with a working medium for absorbing the surface heat radiation of the components, the condensation section (12) is arranged on a water return pipeline (14) of the household micro combined heat and power generation device (2), the evaporation section (11) is communicated with the condensation section (12) through a working medium exchange pipeline (15), and the size of the evaporation section (11) is matched with the closed box body (21) of the household micro combined heat and power generation device (2), the evaporation section (11) is arranged behind the closed box body (21) to divide the closed box body (21) into two parts which are respectively used for installing an electric control part and a power part of the household micro combined heat and power device (2).
2. The evaporative heat exchanger for recovering surface heat of the component as recited in claim 1, wherein the condensing section (12) is disposed above the evaporating section (11), and the inlet installation height of the working medium exchange pipeline (15) is higher than the outlet installation height.
3. An evaporative heat exchanger for recovering the surface heat of the components as recited in claim 1 wherein the surface of the evaporation section (11) is plate-shaped.
4. An evaporative heat exchanger for recovering the surface heat of the components as claimed in claim 1, wherein the fluid passages (13) are in the form of a grid.
5. An evaporative heat exchanger for recuperating the surface heat of the components according to claim 1, characterized in that said condensation section (12) comprises any one of a double-tube heat exchanger and a plate heat exchanger.
6. A household micro cogeneration device comprises a closed box body (21), an electric control part and a power part, wherein the electric control part and the power part are arranged in the closed box body, the electric control part is connected with the power part, the household micro cogeneration device is characterized by further comprising the evaporation heat exchanger (1) according to any one of claims 1 to 5, the evaporation heat exchanger (1) is arranged in the closed box body (21) to divide the closed box body (21) into two cavities, and the electric control part and the power part are respectively arranged in the two cavities.
7. The household micro cogeneration device according to claim 6, wherein the power unit comprises a return water preheater (22), a cylinder liner water heat exchanger (23), a prime mover (24), a flue gas heat exchanger (25) and a generator (26), the return water preheater (22), the cylinder liner water heat exchanger (23), the prime mover (24) and the flue gas heat exchanger (25) are sequentially connected to form a hot water supply loop, and the prime mover (24) is further connected with the generator (26) to form a power generation circuit.
8. A domestic miniature combined heat and power generation device according to claim 7, wherein said electrical control means comprises an electrical controller for controlling the operation of each sub-unit of the hot water supply circuit and a grid-connected controller for grid-connection of the power generation lines.
9. A domestic micro cogeneration unit according to claim 7, wherein said prime mover (24) comprises one of an internal combustion engine, a Stirling engine and a fuel cell, and said generator (26) comprises one of a permanent magnet generator or an asynchronous induction generator.
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| CN202010607237.1A CN111878224B (en) | 2020-06-30 | 2020-06-30 | Evaporation heat exchanger for recycling surface heat radiation of component and household miniature cogeneration device |
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| CN102116215A (en) * | 2010-12-29 | 2011-07-06 | 上海新奥能源科技有限公司 | Self-electricity consumption reduction combined cooling heat and power system |
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| CN110514042A (en) * | 2019-08-09 | 2019-11-29 | 内蒙古科技大学 | Heat pipe bundle double-pipe exchange and waste-heat recovery device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160194997A1 (en) * | 2010-02-17 | 2016-07-07 | Mcalister Technologies, Llc | Energy system for dwelling support |
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| CN102116215A (en) * | 2010-12-29 | 2011-07-06 | 上海新奥能源科技有限公司 | Self-electricity consumption reduction combined cooling heat and power system |
| CN106482557A (en) * | 2016-09-14 | 2017-03-08 | 上海交通大学 | The heat chemistry absorption heat-pipe apparatus that a kind of utilization low grade heat energy drives |
| CN110173751A (en) * | 2019-06-11 | 2019-08-27 | 山东省食品发酵工业研究设计院 | A kind of total heat recovery type integrated gas heat pump heat supply unit and its application |
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