CN105089849A - Exhaust afterheat temperature difference thermoelectric system - Google Patents
Exhaust afterheat temperature difference thermoelectric system Download PDFInfo
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- CN105089849A CN105089849A CN201510430728.2A CN201510430728A CN105089849A CN 105089849 A CN105089849 A CN 105089849A CN 201510430728 A CN201510430728 A CN 201510430728A CN 105089849 A CN105089849 A CN 105089849A
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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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- 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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Abstract
The invention provides an exhaust afterheat temperature difference thermoelectric system. The system comprises a heat exchange unit, a thermoelectric unit and a power supply management unit, wherein the heat exchange unit comprises at least one heat exchange module; the heat exchange modules are used for transferring exhaust heat to a heat conducting fluid; the thermoelectric unit comprises at least one thermoelectron unit corresponding to the heat exchange modules one to one; each thermoelectron units comprises at least one thermoelectric module; the thermoelectric modules are used for converting heat energy to electric energy under the effect of the heat conducting fluid and a cooling fluid; and the power supply management unit is connected with the thermoelectric unit, and is used for receiving the electric energy output by the thermoelectric modules and outputting or storing the electric energy. The system uses the heat conducting fluid for exchanging exhaust afterheat, uses the thermoelectric device for realizing thermoelectric conversion, adopts the step type heat exchange modules, further uses a control system for controlling the temperature of heat conducting oil, and has such advantages as simple structure, high energy utilization rate, high energy conversion efficiency, no noise, no pollution, long life, small occupied space and high power supply per unit volume.
Description
Technical field
The present invention relates to exhaust heat and utilize technical field, particularly relate to a kind of exhaust heat temperature-difference thermoelectric system.
Background technique
Marine diesel engine exhaust heat contains the heat with Effective power equivalent, and recovery waste heat energy can improve fuel-economy performance.The exhaust heat being applicable to marine diesel engine at present utilizes technology as follows:
(1) exhaust gas turbocharge: exhaust promotes turbo machine, drives gas compressor work, realizes air intake pressurized; Make oil inflame abundant, improve power plant economy energy; But turbosupercharging can only utilize portion discharge waste heat, belongs to high-speed moving part, noise is comparatively large, and be not suitable for the boats and ships of specific use, Applicable scope is narrower.
(2) utilizing waste heat for refrigeration: be power with heat energy, utilizes certain medium states of matter to convert and realizes refrigeration.But utilizing waste heat for refrigeration complex structure, volume is comparatively large, and cost is high, on the boats and ships of spaces compact, does not often have enough space mounting heat refrigeration apparatus.
(3) cogeneration: waste-heat steam or driving electrical power generators.The defect of the method is that using energy source grade is lower, and complex structure is heavy, and movement parts is complicated, safeguards complicated.
(4) improvement burning: heated fuel oil, improves oil inflame performance.The method focuses on improvement burning, and does not make full use of waste heat energy.
(5) exhaust heat boiler: heated fuel oil, lubricating oil after heating water medium generation saturated vapour.The defect of the method is structure bulky, and utilization rate of waste heat is lower.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The invention provides the exhaust heat temperature-difference thermoelectric system that a kind of structure is simple, movement-less part, transformation of energy link are few, and meet that capacity usage ratio is high further, UTILIZATION OF VESIDUAL HEAT IN scope extensively and do not affect the demands such as diesel powered output.
The invention provides a kind of exhaust heat temperature-difference thermoelectric system, comprising:
Heat exchange unit, comprises at least one heat exchange module, and described heat exchange module is used for the heat of exhaust to pass to heat-conducting fluid;
Thermoelectric unit, comprise at least one, with described heat exchange module thermoelectron unit one to one, described thermoelectron unit comprises at least one electrothermal module, and it is electric energy that described electrothermal module to be used for thermal energy under the effect of described heat-conducting fluid and cooling fluid; And,
PMU, is connected with described thermoelectric unit, for receiving the electric energy that described electrothermal module exports, and exports electric energy or storage of electrical energy.
The exhaust heat temperature-difference thermoelectric system that many embodiments of the present invention provide exchanges exhaust heat by heat-conducting fluid, utilizes thermo-electric device to realize thermoelectricity conversion, thus meets the demands such as marine diesel engine bootstrap system structure is simple, capacity usage ratio is high;
The exhaust heat temperature-difference thermoelectric system that many embodiments of the present invention provide, not containing moving element, has that structure is simple, noiseless, pollution-free, the life-span long, take up room little, per unit volume delivery advantages of higher;
Some embodiments of the present invention adopt cascade heat exchange module, the abundant waste heat reclaiming exhaust, adopt conduction oil as heat-carrying agent, and use control system to control the temperature of conduction oil further, make conduction oil temperature stabilization in the optimum working temperature of electrothermal module, thus realize the maximization of conversion efficiency of thermoelectric;
Heat energy is directly converted to electric energy by many embodiments of the present invention, decreases the medium tache of energy conversion, is convenient to apply on boats and ships while improve capacity usage ratio.
Accompanying drawing explanation
Below with reference to the accompanying drawings illustrate embodiments of the invention, above and other objects, features and advantages of the present invention can be understood more easily.Parts in accompanying drawing are just in order to illustrate principle of the present invention.In the accompanying drawings, same or similar technical characteristics or parts will adopt same or similar reference character to represent.
Fig. 1 is the structural representation of the exhaust heat temperature-difference thermoelectric system according to the embodiment of the present invention.
Fig. 2 is the process principle figure of exhaust heat temperature-difference thermoelectric system according to the preferred embodiment of the invention.
Description of reference numerals:
10 heat exchange units
30 thermoelectric units
50 PMUs
11 heat exchange modules
12 high temperature heat exchange modules
Warm heat exchange module in 13
14 low-temperature heat exchange modules
31 thermoelectron unit
311 electrothermal modules
71 control modules
Embodiment
With reference to the accompanying drawings embodiments of the invention are described.The element described in an accompanying drawing of the present invention or a kind of mode of execution and feature can combine with the element shown in one or more other accompanying drawing or mode of execution and feature.It should be noted that for purposes of clarity, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.
Fig. 1 is the structural representation of the exhaust heat temperature-difference thermoelectric system according to the embodiment of the present invention.
As shown in Figure 1, the exhaust heat temperature-difference thermoelectric system of the present embodiment comprises:
Heat exchange unit 10, comprises at least one heat exchange module 11, and described heat exchange module is used for the heat of exhaust to pass to heat-conducting fluid;
Thermoelectric unit 30, comprise at least one, with heat exchange module 11 thermoelectron unit 31 one to one, thermoelectron unit 31 comprises at least one electrothermal module 311, and electrothermal module 311 for being electric energy by thermal energy under the effect of described heat-conducting fluid and cooling fluid;
PMU 50, is connected with thermoelectric unit 30, for receiving the electric energy that electrothermal module 311 exports, and exports electric energy or storage of electrical energy.
Particularly, as shown in Figure 1, in the present embodiment, heat exchange unit 10 comprises m heat exchange module 11, and accordingly, thermoelectric unit 30 comprises m and a described m heat exchange module 11 thermoelectron unit one to one, each thermoelectron unit comprises the electrothermal module 311 of n series connection, wherein, m is positive integer, n be greater than 1 positive integer.In some implementations, described heat-conducting fluid is conduction oil, and described cooling fluid is cooling water.
When m is 1, exhaust enters after heat exchange unit 10 by heat exchange module 11, the heat of described exhaust is passed to the heat-conducting fluid flowing through self by heat exchange module 11, after described heat-conducting fluid absorbs heat, flow into corresponding thermoelectron unit 31, and flow through successively the 11st electrothermal module, the 12nd electrothermal module ..., 1n electrothermal module, by thermal energy be electric energy respectively for each electrothermal module under the effect of the first heat-conducting fluid and the first cooling fluid.PMU 50 is connected with thermoelectron unit 31, receives the electric energy that each electrothermal module 311 exports, and exports the electric energy of rated power, or charge thus storage of electrical energy to storage battery.
When m is greater than 1, exhaust enter heat exchange unit 10 after, by the first heat exchange module, the second heat exchange module ..., m heat exchange module, the heat of described exhaust is passed to the heat-conducting fluid flowing through self by each heat exchange module 11.First heat-conducting fluid flows through after described first heat exchange module absorbs described exhaust gas heat, flow into the first corresponding thermoelectron unit, and flow through successively the 11st electrothermal module, the 12nd electrothermal module ..., 1n electrothermal module, by thermal energy be electric energy respectively for each electrothermal module under the effect of the first heat-conducting fluid and the first cooling fluid.Similar, the thermal energy of each heat-conducting fluid is electric energy by electrothermal module 311 in each thermoelectron unit 31 respectively.PMU 50 is connected with each thermoelectron unit 31 respectively, receives the electric energy that each electrothermal module 311 exports, and exports the electric energy of rated power, or charge thus storage of electrical energy to storage battery.
In a preferred embodiment, when heat exchange unit 10 comprises multiple heat exchange module 11, described multiple heat exchange module 11 is connected in series, and described exhaust flows through the heat exchange module 11 of described series connection successively.Namely the first heat exchange module, the second heat exchange module ..., m heat exchange module is connected in series, exhaust successively by described first heat exchange module, the second heat exchange module ..., m heat exchange module.This preferred embodiment adopts cascade heat exchange module, can make full use of the waste heat of exhaust.
Fig. 2 is the process principle figure of exhaust heat temperature-difference thermoelectric system according to the preferred embodiment of the invention.As shown in Figure 2, in a preferred embodiment, heat exchange unit 10 comprises the high temperature heat exchange module 12 be sequentially connected in series, middle temperature heat exchange module 13 and low-temperature heat exchange module 14.Described exhaust flows through high temperature heat exchange module 12, middle temperature heat exchange module 13, low-temperature heat exchange module 14 successively.The advantage of this preferred embodiment is taken into account employing cascade heat exchange module thus made full use of exhaust heat, and does not adopt too much heat exchange module and thermoelectron unit thus holding structure is simple, take up room little advantage.
In a preferred embodiment, described heat-conducting fluid flows through after heat exchange module 11 absorbs heat, flows through the high temperature end face of the first electrothermal module to the n-th electrothermal module in the thermoelectron unit 31 corresponding to heat exchange module 11 successively;
Described cooling fluid and described heat-conducting fluid oppositely flow through the low temperature end face of the n-th electrothermal module to the first electrothermal module in the thermoelectron unit 31 corresponding to heat exchange module 11 successively.
Particularly, adopt heat-conducting fluid and cooling fluid reverse flow can keep the temperature difference between heat-conducting fluid and cooling fluid to the full extent through the design of electrothermal module, thus make electrothermal module keep efficient energy conversion rate.
In a preferred embodiment, the operating temperature of described first electrothermal module to the n-th electrothermal module reduces successively.Particularly, the thermo-electric device adopting operating temperature corresponding with heat-conducting fluid temperature, as electrothermal module, can make the larger probability of electrothermal module be operated in optimum working temperature, improves the energy conversion efficiency of electrothermal module.
In a preferred embodiment, as shown in Figure 2, the exhaust heat temperature-difference thermoelectric system that the present embodiment provides also comprises control unit, and described control unit comprises:
Temperature transmitter, is arranged on the entrance of thermoelectron unit 31, for detecting the real-time temperature of described heat-conducting fluid;
Solenoid valve, is arranged on the entrance of thermoelectron unit 31, flows to thermoelectron unit 31 for controlling described heat-conducting fluid or flows to the heat exchange module 11 corresponding to thermoelectron unit 31;
Control module 71, be connected with described temperature transmitter, described solenoid valve, for judging whether described real-time temperature reaches the operating temperature of thermoelectron unit 31, as do not reached, then by heat-conducting fluid circular flow described in described electromagnetic valve to the heat exchange module 11 corresponding to described thermoelectron unit 31.
Particularly, when heat-conducting fluid does not reach the operating temperature of thermoelectron unit 31, as entered thermoelectron unit 31, each electrothermal module 311 in thermoelectron unit 31 can be caused not work in operating temperature range, thus cause energy conversion efficiency to reduce, therefore control module 71 is monitored by the temperature of temperature transmitter to heat-conducting fluid and the heat-conducting fluid circular flow not reached thermoelectron unit 31 operating temperature by electromagnetic valve is heated to the heat exchange module 11 of correspondence, until the temperature of heat-conducting fluid reaches thermoelectron unit 31 operating temperature, thus ensured the energy conversion rate of each electrothermal module 311.
In a preferred embodiment, after described heat-conducting fluid flows out thermoelectron unit 31, by recycle pump circular flow to corresponding heat exchange module 11.Particularly, the design recycling heat-conducting fluid is adopted to make the present invention possess environment friendly and pollution-free advantage.
In a preferred embodiment, described temperature transmitter is also arranged on inside or the outlet of thermoelectron unit 31.
Control module 71 is connected with described recycle pump, when the temperature also for being monitored described heat-conducting fluid by described temperature transmitter is fluctuated up and down, controls the flow that described recycle pump regulates described heat-conducting fluid.
Particularly, when the temperature of heat-conducting fluid fluctuates up and down, operating temperature and the energy conversion efficiency of each electrothermal module 311 can be affected, control module 71 regulates the flow of heat-conducting fluid by described recycle pump, thus the workload of each electrothermal module 311 of indirect regulation, realize the temperature stabilization of heat-conducting fluid at best operating point further.
In a preferred embodiment, the outlet of described thermoelectron unit is also provided with flowmeter.Particularly, control module 71 obtains the flow of heat-conducting fluid by flowmeter, thus realizes the accurate adjustment to described recycle pump.
In a preferred embodiment, between the outlet and described recycle pump of described thermoelectron unit, also dehumidifier is provided with.
The exhaust heat temperature-difference thermoelectric system that many embodiments of the present invention provide exchanges exhaust heat by heat-conducting fluid, utilizes thermo-electric device to realize thermoelectricity conversion, thus meets the demands such as marine diesel engine bootstrap system structure is simple, capacity usage ratio is high;
The exhaust heat temperature-difference thermoelectric system that many embodiments of the present invention provide, not containing moving element, has that structure is simple, noiseless, pollution-free, the life-span long, take up room little, per unit volume delivery advantages of higher;
Some embodiments of the present invention adopt cascade heat exchange module, the abundant waste heat reclaiming exhaust, adopt conduction oil as heat-carrying agent, and use control system to control the temperature of conduction oil further, make conduction oil temperature stabilization in the optimum working temperature of electrothermal module, thus realize the maximization of conversion efficiency of thermoelectric;
Heat energy is directly converted to electric energy by many embodiments of the present invention, decreases the medium tache of energy conversion, is convenient to apply on boats and ships while improve capacity usage ratio.
Last it is noted that above embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (10)
1. an exhaust heat temperature-difference thermoelectric system, is characterized in that, comprising:
Heat exchange unit, comprises at least one heat exchange module, and described heat exchange module is used for the heat of exhaust to pass to heat-conducting fluid;
Thermoelectric unit, comprise at least one, with described heat exchange module thermoelectron unit one to one, described thermoelectron unit comprises at least one electrothermal module, and it is electric energy that described electrothermal module to be used for thermal energy under the effect of described heat-conducting fluid and cooling fluid; And,
PMU, is connected with described thermoelectric unit, for receiving the electric energy that described electrothermal module exports, and exports electric energy or storage of electrical energy.
2. exhaust heat temperature-difference thermoelectric system according to claim 1, is characterized in that, when described heat exchange unit comprises multiple heat exchange module, described multiple heat exchange module is connected in series, and described exhaust flows through the heat exchange module of described series connection successively.
3. exhaust heat temperature-difference thermoelectric system according to claim 2, is characterized in that, described heat exchange unit comprises the high temperature heat exchange module be sequentially connected in series, middle temperature heat exchange module and low-temperature heat exchange module; Described exhaust flows through described high temperature heat exchange module, described middle temperature heat exchange module and described low-temperature heat exchange module successively.
4. exhaust heat temperature-difference thermoelectric system according to claim 1, is characterized in that, the thermoelectron unit corresponding to described heat exchange module comprise n series connection electrothermal module, n be greater than 1 integer;
Described heat-conducting fluid flows through the high temperature end face of the first electrothermal module to the n-th electrothermal module in the thermoelectron unit corresponding to described heat exchange module after flowing through described heat exchange module absorption heat successively;
Described cooling fluid and described heat-conducting fluid oppositely flow through the low temperature end face of the n-th electrothermal module to the first electrothermal module in the thermoelectron unit corresponding to described heat exchange module successively.
5. exhaust heat temperature-difference thermoelectric system according to claim 4, is characterized in that, the operating temperature of described first electrothermal module to the n-th electrothermal module reduces successively.
6. the exhaust heat temperature-difference thermoelectric system according to claim 1-5 any one, it is characterized in that, also comprise control unit, described control unit comprises:
Temperature transmitter, is arranged on the entrance of described thermoelectron unit, for detecting the real-time temperature of described heat-conducting fluid;
Solenoid valve, is arranged on the entrance of described thermoelectron unit, for controlling the heat exchange module that described heat-conducting fluid flows to described thermoelectron unit or flows to corresponding to described thermoelectron unit;
Control module, be connected with described temperature transmitter, described solenoid valve, for judging whether described real-time temperature reaches the operating temperature of described thermoelectron unit, as do not reached, then by heat-conducting fluid circular flow described in described electromagnetic valve to the heat exchange module corresponding to described thermoelectron unit.
7. exhaust heat temperature-difference thermoelectric system according to claim 6, is characterized in that, after described heat-conducting fluid flows out described thermoelectron unit, by recycle pump circular flow to corresponding heat exchange module.
8. exhaust heat temperature-difference thermoelectric system according to claim 7, is characterized in that, described temperature transmitter is also arranged on inside or the outlet of described thermoelectron unit;
Described control module is connected with described recycle pump, when the temperature also for being monitored described heat-conducting fluid by described temperature transmitter is fluctuated up and down, controls the flow that described recycle pump regulates described heat-conducting fluid.
9. exhaust heat temperature-difference thermoelectric system according to claim 8, is characterized in that, the outlet of described thermoelectron unit is also provided with the flowmeter for measuring described heat-conducting fluid flow.
10. exhaust heat temperature-difference thermoelectric system according to claim 7, is characterized in that, between the outlet and described recycle pump of described thermoelectron unit, be also provided with dehumidifier.
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| CN201510430728.2A CN105089849B (en) | 2015-07-21 | 2015-07-21 | Exhaust heat temperature-difference thermoelectric system |
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Cited By (7)
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| CN106523103A (en) * | 2016-11-09 | 2017-03-22 | 中国船舶重工集团公司第七研究所 | Medium circulation system for exhaust heat indirect type temperature-difference thermoelectric device for marine diesel engine |
| CN109026306A (en) * | 2018-08-06 | 2018-12-18 | 武汉理工大学 | Marine exhaust waste heat recycling system |
| CN110611457A (en) * | 2019-11-05 | 2019-12-24 | 河北工业大学 | Tail gas temperature difference power generation system adopting intermediate fluid circulation |
| CN111555422A (en) * | 2020-05-14 | 2020-08-18 | 北京许继电气有限公司 | Server cabinet heat exchange system |
| CN112886869A (en) * | 2021-03-17 | 2021-06-01 | 中国船舶重工集团公司第七一一研究所 | Thermoelectric heat energy conversion device and thermoelectric heat system |
| CN113503206A (en) * | 2021-06-09 | 2021-10-15 | 武汉理工大学 | Tail gas waste heat recovery system and ship |
| CN116146299A (en) * | 2023-04-19 | 2023-05-23 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Multi-quality energy recycling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106523103A (en) * | 2016-11-09 | 2017-03-22 | 中国船舶重工集团公司第七研究所 | Medium circulation system for exhaust heat indirect type temperature-difference thermoelectric device for marine diesel engine |
| CN109026306A (en) * | 2018-08-06 | 2018-12-18 | 武汉理工大学 | Marine exhaust waste heat recycling system |
| CN110611457A (en) * | 2019-11-05 | 2019-12-24 | 河北工业大学 | Tail gas temperature difference power generation system adopting intermediate fluid circulation |
| CN111555422A (en) * | 2020-05-14 | 2020-08-18 | 北京许继电气有限公司 | Server cabinet heat exchange system |
| CN112886869A (en) * | 2021-03-17 | 2021-06-01 | 中国船舶重工集团公司第七一一研究所 | Thermoelectric heat energy conversion device and thermoelectric heat system |
| CN112886869B (en) * | 2021-03-17 | 2022-06-21 | 中国船舶重工集团公司第七一一研究所 | Thermoelectric heat energy conversion device and thermoelectric heat system |
| CN113503206A (en) * | 2021-06-09 | 2021-10-15 | 武汉理工大学 | Tail gas waste heat recovery system and ship |
| CN113503206B (en) * | 2021-06-09 | 2022-10-04 | 武汉理工大学 | Tail gas waste heat recovery system and ship |
| CN116146299A (en) * | 2023-04-19 | 2023-05-23 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Multi-quality energy recycling system |
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Effective date of registration: 20201225 Address after: 201108 building 6, 4299 Jindu Road, Minhang District, Shanghai Patentee after: Shanghai Qiyao Environmental Protection Technology Co.,Ltd. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: China Shipbuilding Industry Corporation 711 Research Institute |