CN104482790A - Phase change heat storage device and method utilizing engine waste gas waste heat - Google Patents
Phase change heat storage device and method utilizing engine waste gas waste heat Download PDFInfo
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- CN104482790A CN104482790A CN201410688784.1A CN201410688784A CN104482790A CN 104482790 A CN104482790 A CN 104482790A CN 201410688784 A CN201410688784 A CN 201410688784A CN 104482790 A CN104482790 A CN 104482790A
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- heat
- accumulation unit
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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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- Air-Conditioning For Vehicles (AREA)
Abstract
A phase change heat storage device and method utilizing engine waste gas waste heat relates to automobile waste gas and waste heat utilization. The device comprises a warm fluid pipeline, a heat exchange rib, a cool fluid pipeline and a sleeve. The warm fluid pipeline is connected with an engine exhaust pipe, the heat exchange rib is fixedly connected onto the outside of the warm fluid pipeline, a clamping groove is formed in the edge of the heat exchange rib, the cool fluid pipeline is clamped in the clamping groove, the sleeve is arranged on the outside of the heat exchange rib and the cool fluid pipeline, and a phase change material is arranged between the hot fluid pipeline and the sleeve. The device is simple in structure, small in size and convenient to arrange on an automobile. By means of the method, waste gas waste heat generated in the automobile running process is first utilized to enable the phase change heat storage device to store heat. During the cool starting or warming up process, cool fluid flowing through the phase change heat storage device is heated to preheat the engine, and fuel economy in the automobile cool starting and warming up process is improved by heating cooling water in the engine.
Description
Technical field
The present invention relates to automobile exhaust gas UTILIZATION OF VESIDUAL HEAT IN, particularly a kind of phase transition heat accumulation unit and method utilizing engine exhaust waste heat.
Background technology
Due to the aggravation of energy resource consumption, vehicle energy saving problem receives increasing concern.At present, the Effective power that internal combustion engine exports only accounts for the sub-fraction of fuel combustion release heat, and I. C. engine exhaust is full of a large amount of heats as a kind of used heat.If reclaimed by the waste gas residual heat of heat recovery technology by internal combustion engine, so the efficiency of internal combustion engine will significantly promote.
At present, the cold start-up of automobile is mainly realized by independent cold-starting device, some cold-starting devices are realized by solenoid control distributive value, be difficult to accomplish low oil consumption and low emission in cold start-up and Re Che process, so the fuel consumption and emission characteristic of vehicle cannot be ensured, also cannot avoid the wearing and tearing of cold conditions process vehicle component simultaneously.Some cold-starting devices adopt Electric heating, this starting drive complex structure, and volume is large, and cost is high, is not easy to arrange.No matter which kind of cold-starting device above-mentioned in addition, it runs all needs the longer time and increases extra energy loss, could by automobile starting.
Summary of the invention
The object of this invention is to provide a kind of phase transition heat accumulation unit and the method that utilize engine exhaust waste heat, solve that engine exhaust heat device volume in prior art is excessive, the problem of cold start-up or hot car overlong time, its structure is simple, volume is little, be convenient to arrange on vehicle.
Technical scheme of the present invention is achieved in that a kind of phase transition heat accumulation unit utilizing engine exhaust waste heat, its technical essential is: this device comprises hot fluid pipeline, heat exchange fin, cold fluid pipe and sleeve, described hot fluid pipeline is connected with the exhaust pipe of engine, heat exchange fin is connected at described hot fluid pipeline extenal fixation, described heat exchange fin edge is provided with draw-in groove, cold fluid pipe clamp is connected in described draw-in groove, be outside equipped with sleeve at heat exchange fin and cold fluid pipe, between described hot fluid pipeline and sleeve, be provided with phase-change material.
Described heat exchange fin is ring-type fin.
Described sleeve and the end socket of sleeve are stainless steel, and the two ends end socket of sleeve and sleeve welds together.
Described hot fluid pipeline and cold fluid pipeline are copper tube.
Certain expansion clearance is left between described cold fluid pipe and draw-in groove.
Utilize a phase-transition heat-storage method for engine exhaust waste heat, comprise the steps:
Step 1: utilize the waste gas residual heat produced in vehicle traveling process to make phase transition heat accumulation unit accumulation of energy;
By hot fluid pipeline, heat is transmitted hot fluid tube wall and heat exchange fin, phase-change material absorbs heat, and temperature raises, and be converted to liquid state by solid-state, phase transition heat accumulation unit stores energy;
Step 2: when cold start-up or hot car, makes engine prewarming after the cold fluid flowing through phase transition heat accumulation unit is heated;
In cold start-up or hot car process, cold fluid enters phase transition heat accumulation unit and is heated, by heat after cold fluid within the engine heat release, reenter phase transition heat accumulation unit again to be heated, continue transferring heat to engine, along with the decline of phase transition heat accumulation unit temperature, phase-change material is converted to solid-state by liquid state, phase transition heat accumulation unit terminates the release of energy, realizes the pre-heat treatment to engine.
Heat exchange fin described in step 1 is annular fin.
beneficial effect of the present invention:the phase transition heat accumulation unit of the engine exhaust waste heat that the present invention proposes, comprises hot fluid pipeline, heat exchange fin, cold fluid pipe and sleeve, its structure is simple, volume is little, is convenient to arrange on vehicle.Phase-transition heat-storage method of the present invention, during engine running, utilizes phase-change material to reclaim the used heat of engine generation.When stopping, the used heat reclaimed can effectively be preserved, during startup vehicle, heat can be absorbed by the cold fluid flowing through engine, improve the temperature of engine body, even if like this under arctic weather, " warm engine " is also easy to start, and without the need to the cold-starting device of complexity, repeatedly cold start-up correspondingly also can be avoided the wearing and tearing of engine.
At low ambient temperatures, starting motor-driven vehicle chance is because of fuel condensation, the reason such as machine oil is sticky and cold start-up difficulty occurs.Along with the progress of technology, as the electric jet technology etc. of gasoline engine, made cold starting performance greatly improve, but the component wear etc. that cold start-up produces endanger still serious.Different from other assistant starting or preheating method, the pipeline start up by preheating using phase transition heat accumulation unit to carry out is the whole body of preheating before activation, whole organism temperature is improved, low-temperature cool starting difficult problem can not only be solved, and have good effect to alleviating component wear, reducing waste of fuel and reducing tail gas pollution.
Accompanying drawing explanation
Fig. 1 is the front view that the present invention utilizes the phase transition heat accumulation unit of engine exhaust waste heat;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the phase-transition heat-storage method flow diagram of engine exhaust waste heat of the present invention.
Detailed description of the invention
Be described in further detail below in conjunction with accompanying drawing 1 ~ 3 pair of embodiments of the present invention.
Embodiment 1:
The phase transition heat accumulation unit utilizing engine exhaust waste heat of the present embodiment, as shown in Figure 1.This device comprises hot fluid pipeline 3, heat exchange fin 4, cold fluid pipe and sleeve 6.This hot fluid pipeline 3 is connected with the exhaust pipe of engine, heat exchange fin 4 is connected at hot fluid pipeline 3 extenal fixation, this heat exchange fin 4 edge is provided with draw-in groove, cold fluid pipe clamp is connected in this draw-in groove, be outside equipped with sleeve 6 at heat exchange fin 4 and cold fluid pipe, between hot fluid pipeline 3 and sleeve 6, be provided with phase-change material 5.
Cold fluid flows into phase transition heat accumulation unit by cold fluid inlet 1, flows out phase transition heat accumulation unit, as shown in Figure 2 by cold fluid outlet 2.
Embodiment 2:
The phase transition heat accumulation unit of the present embodiment and the difference of embodiment 1 are: heat exchange fin 4 is ring-type fin.
Embodiment 3:
The phase transition heat accumulation unit of the present embodiment and the difference of embodiment 1 are: the two ends of sleeve 6 are also provided with sleeve end socket, and the end socket at sleeve 6 and sleeve two ends welds together.Sleeve and sleeve end socket are stainless steel.
Embodiment 4:
The phase transition heat accumulation unit of the present embodiment and the difference of embodiment 1 are: hot fluid pipeline 3 and cold fluid pipeline material are copper tube.
Embodiment 5:
Described phase transition heat accumulation unit described in the present embodiment and the difference of embodiment 1 are: leave certain expansion clearance between cold fluid pipe and draw-in groove.If draw-in groove diameter is Φ 24mm, cold fluid pipe is Φ 20mm, and the two leaves certain expansion clearance.
Embodiment 6:
A kind of phase-transition heat-storage method utilizing engine exhaust waste heat in the present embodiment, its flow process as shown in Figure 3, comprises the steps:
Step 301: utilize the waste gas residual heat produced in vehicle traveling process to make phase transition heat accumulation unit accumulation of energy;
In vehicle traveling process, hot fluid transfers heat to hot fluid tube wall and heat exchange fin by hot fluid pipeline, and phase-change material melts after absorbing heat.In the starting stage that heat absorption is melted, the liquid state amount of phase-change material is less, and free convection effect is little, heat transmission based on heat conduction, solid liquid interface from heating wall very close to; Along with liquid state amount increases gradually, heat transfer type becomes based on convection heat transfer' heat-transfer by convection, and after the liquid state phase change material heat absorption of heated wall, temperature raises, density reduces, move up under the effect of buoyancy, the phase-change material on hot fluid pipe top is subject to thermal shock, melts speed and accelerates, until top is melted completely, after adiabatic heat-insulation, still can keep higher temperature in a few hours, this is the heat absorption insulating process of phase transition heat accumulation unit.
Step 302: when cold start-up or hot car, makes engine prewarming after the cold fluid flowing through phase transition heat accumulation unit is heated;
In cold start-up or hot car process, when cold fluid flows through from cold fluid pipe, with tube wall generation heat convection, originally because thermograde is quite large, heat exchange is very fast, by heat cooling water flow out of cold fluid pipe after, heat release within the engine, cooling water temperature declines to some extent, then enters regenerative apparatus again and heats.Along with the carrying out of heat exchange, the temperature of cooling water raises gradually, and the temperature of phase change region reduces gradually, and heat exchange rate declines to some extent.Along with the carrying out of heat release, the temperature of phase change region reduces again and again, the heat that can transmit cooling water constantly reduces, again the highest temperature can not be heated to after cooling water heat release cooling, but still can continue to absorb phase-change material cooled and solidified institute liberated heat, temperature maintains a relatively high temperature, and this process is longer for perdurabgility, guarantee that coolant water temperature is more stable, realize the pre-heat treatment to engine.
Embodiment 7:
A kind of in the present embodiment utilizes the phase-transition heat-storage method of engine exhaust waste heat and the difference of embodiment 6 to be: the heat exchange fin in step 1 is annular fin.
Embodiment 8:
A kind of in the present embodiment utilizes the phase-transition heat-storage method of engine exhaust waste heat and the difference of embodiment 6 to be: the phase-change material described in step 1 can be inorganic salts high temperature phase change material (pcm), e.g., and MgF
2, KF, MgCl
2, NaNO
3, Li
2sO
4, Na
2cO
3, KOH, LiOH, 50%NaCl+50%MgCl
2, 95.4%NaCl+4.6%CaCl
2, LiOH+LiF, 37%LiCl+63%LiOH, Na
2cO
3-BaCO
3/ MgO.
Also can be inorganic salts, ceramic base composite energy-storage material, as Na
2sO
4/ SiO
2, Na
2cO
3-BaCO
3/ MgO, NaCO
3-NaNO
2/ MgO.
Also can be organic matter, as stearic acid, palmitic acid, myristic acid, paraffin wax, laurate, n-tetradecane, n-pentadecane, hexadecane, n-octadecane, acetamide, antifebrin.
Erythritol also can be selected as phase-change material.
Phase-change material is not unique, and the present embodiment is only illustrated as a reference.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (7)
1. one kind utilizes the phase transition heat accumulation unit of engine exhaust waste heat, it is characterized in that: described device comprises hot fluid pipeline, heat exchange fin, cold fluid pipe and sleeve, described hot fluid pipeline is connected with the exhaust pipe of engine, heat exchange fin is connected at described hot fluid pipeline extenal fixation, described heat exchange fin edge is provided with draw-in groove, cold fluid pipe clamp is connected in described draw-in groove, be outside equipped with sleeve at heat exchange fin and cold fluid pipe, between described hot fluid pipeline and sleeve, be provided with phase-change material.
2. utilize the phase transition heat accumulation unit of engine exhaust waste heat as claimed in claim 1, it is characterized in that: described heat exchange fin is ring-type fin.
3. utilize the phase transition heat accumulation unit of engine exhaust waste heat as claimed in claim 1, it is characterized in that: described sleeve and the end socket of sleeve are stainless steel, and the two ends end socket of sleeve and sleeve welds together.
4. utilize the phase transition heat accumulation unit of engine exhaust waste heat as claimed in claim 1, it is characterized in that: described hot fluid pipeline and cold fluid pipeline are copper tube.
5. utilize the phase transition heat accumulation unit of engine exhaust waste heat as claimed in claim 1, it is characterized in that: between described cold fluid pipe and draw-in groove, leave certain expansion clearance.
6. utilize a phase-transition heat-storage method for engine exhaust waste heat, adopt device as claimed in claim 1, it is characterized in that: step 1: utilize the waste gas residual heat produced in vehicle traveling process to make phase transition heat accumulation unit accumulation of energy;
By hot fluid pipeline, heat is transmitted hot fluid tube wall and heat exchange fin, phase-change material absorbs heat, and temperature raises, and is converted to liquid state, realizes the accumulation of energy of phase transition heat accumulation unit by solid-state;
Step 2: when cold start-up or hot car, makes engine prewarming after the cold fluid flowing through phase transition heat accumulation unit is heated;
In cold start-up or hot car process, cold fluid enters phase transition heat accumulation unit and is heated, by heat after cold fluid within the engine heat release, reenter phase transition heat accumulation unit again to be heated, continue transferring heat to engine, along with the decline of phase transition heat accumulation unit temperature, phase-change material is converted to solid-state by liquid state, phase transition heat accumulation unit terminates the release of energy, realizes the pre-heat treatment to engine.
7. utilizing the phase-transition heat-storage method of engine exhaust waste heat as claimed in claim 6, it is characterized in that: the heat exchange fin described in step 1, is annular fin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410688784.1A CN104482790A (en) | 2014-11-26 | 2014-11-26 | Phase change heat storage device and method utilizing engine waste gas waste heat |
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| CN201410688784.1A CN104482790A (en) | 2014-11-26 | 2014-11-26 | Phase change heat storage device and method utilizing engine waste gas waste heat |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989548A (en) * | 2015-06-08 | 2015-10-21 | 浙江大学 | Engine coolant waste heat utilization engine warming system adopting solid-liquid phase change heat reservoir and method of engine coolant waste heat utilization engine warming system |
| CN105004072A (en) * | 2015-07-01 | 2015-10-28 | 江苏中储能源装备有限公司 | Inner pot of melting device of phase-change heat storage media |
| CN106150629A (en) * | 2016-06-30 | 2016-11-23 | 上海第二工业大学 | A kind of system utilizing phase-change material heat storage function to improve thermopower generation efficiency |
| CN106523101A (en) * | 2015-09-10 | 2017-03-22 | 奥迪股份公司 | Heat transfer arrangement for a motor vehicle, and motor vehicle |
| CN108506121A (en) * | 2018-06-08 | 2018-09-07 | 生三胜 | A kind of heat energy from waste gas engine fuel atomization heating device and atomization system |
| CN108883686A (en) * | 2015-12-23 | 2018-11-23 | 卡斯特罗尔有限公司 | Equipment |
| CN109733573A (en) * | 2019-03-04 | 2019-05-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of phase transformation buoyancy regulating device using reactor waste |
| CN110146398A (en) * | 2019-06-13 | 2019-08-20 | 深圳市泰祺科技有限公司 | A kind of cold-hot impact tester |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989548A (en) * | 2015-06-08 | 2015-10-21 | 浙江大学 | Engine coolant waste heat utilization engine warming system adopting solid-liquid phase change heat reservoir and method of engine coolant waste heat utilization engine warming system |
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| CN105004072A (en) * | 2015-07-01 | 2015-10-28 | 江苏中储能源装备有限公司 | Inner pot of melting device of phase-change heat storage media |
| CN106523101A (en) * | 2015-09-10 | 2017-03-22 | 奥迪股份公司 | Heat transfer arrangement for a motor vehicle, and motor vehicle |
| CN108883686A (en) * | 2015-12-23 | 2018-11-23 | 卡斯特罗尔有限公司 | Equipment |
| CN106150629A (en) * | 2016-06-30 | 2016-11-23 | 上海第二工业大学 | A kind of system utilizing phase-change material heat storage function to improve thermopower generation efficiency |
| CN106150629B (en) * | 2016-06-30 | 2018-12-28 | 上海第二工业大学 | A kind of system improving thermopower generation efficiency using phase-change material heat storage function |
| CN108506121A (en) * | 2018-06-08 | 2018-09-07 | 生三胜 | A kind of heat energy from waste gas engine fuel atomization heating device and atomization system |
| CN109733573A (en) * | 2019-03-04 | 2019-05-10 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of phase transformation buoyancy regulating device using reactor waste |
| CN110146398A (en) * | 2019-06-13 | 2019-08-20 | 深圳市泰祺科技有限公司 | A kind of cold-hot impact tester |
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