CN104389648B - A kind of double-source dynamic system and controlling method thereof - Google Patents

A kind of double-source dynamic system and controlling method thereof Download PDF

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Publication number
CN104389648B
CN104389648B CN201410478973.6A CN201410478973A CN104389648B CN 104389648 B CN104389648 B CN 104389648B CN 201410478973 A CN201410478973 A CN 201410478973A CN 104389648 B CN104389648 B CN 104389648B
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internal
combustion engine
cryogenic fluid
heat exchanger
turbine
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CN201410478973.6A
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CN104389648A (en
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杜爱民
朱忠攀
邵达
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Tongji University
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Tongji University
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Abstract

The present invention relates to a kind of double-source dynamic system and controlling method thereof, this system comprises internal-combustion engine, cryogenic fluid storage tank, heat exchanger, turbine and motor, exhaust unit and cooling unit is established in internal-combustion engine, cryogenic fluid storage tank internal storage cryogenic fluid, heat exchanger is to the exhaust of exhaust unit, cooling water and the cryogenic fluid of cooling unit conduct heat, reduce exhaust and cooling water temperature, heating and gasifying is carried out to cryogenic fluid simultaneously, make its formation pressurized gas that expand, turbine is connected with heat exchanger and internal-combustion engine, suction port receives the pressurized gas flowed out from heat exchanger, air outlet is connected with internal-combustion engine, pressurized gas thermal power transfer is become mechanical energy, motor is connected with turbine, generate electricity by turbine drives or outwards do work, mechanical energy is stored as electric energy, or utilize mechanical energy outwards to do work.Compared with prior art, the present invention, while guarantee meets communications and transportation complex working condition power change demand, further increases the capacity usage ratio of power system.

Description

A kind of double-source dynamic system and controlling method thereof
Technical field
The invention belongs to the energy-conserving and emission-cutting technology in Power Machinery and Engineering field, especially relate to a kind of double-source dynamic system and controlling method thereof.
Background technique
Over more than 100 year, internal-combustion engine is widely used in the traffic and transport fields such as automobile, boats and ships, aircraft, rocket, tank as power source, wherein vehicle gasoline engine and diesel engine demand the most surprising.China in Recent Years automobile market remains high speed development, and Annual output rises to 2,212 ten thousand in 2013 by 2,070,000 in 2000, and sales volume rises to 2,198 ten thousand by 2,090,000, and annual compound growth rate all reaches 20%.China exceedes the U.S., becomes global first automobile market.The orthodox car market of quick growth, the energy problem that China is faced and environmental pollution problem become increasingly conspicuous, and combustion engine energy-saving and emission-reduction technology become current study hotspot.
Research shows, during internal combustion engine, only some changes useful work into heat energy contained by fuel, and remaining part loses with heat energy or kinetic energy form, and wherein heat-energy losses mainly comes from the heat that I. C. engine exhaust and cooling water are taken away.Reclaiming the loss of this part engine thermal energy is the inexorable trend improving fuel energy utilization ratio.
Nitrogen is the chief component of air, and account for 78.12% of air, colorless and odorless is pollution-free, and this gas at normal atmospheric pressure temperature is reduced to-196 DEG C and can forms liquid nitrogen; If pressurization can form liquid nitrogen at higher temperatures.Liquid nitrogen is the liquid form that nitrogen is formed at low temperatures, can be used as a kind of low temperature form to exist, and owing to occurring as by-product at empty subsidiary factory liquid nitrogen, preparation cost is cheap, domestic and international scientific research institution once developed related fluid nitrogen air motor as car power source with it, and similar also has liquid helium motor, liquefied air motor and dry ice motor.But these motors fail to be widely used owing to there is the not enough problem of power character, but the pneumatic power form of this low temperature causes the concern of industry more and more.
The thermal loss problem current for internal-combustion engine and the performance advantage of low temperature energy-storage system, the present invention proposes a kind of double-source dynamic system and energy control method thereof.Research show this system effectively make use of afterheat of IC engine can with low temperature energy storage, greatly improve the utilization ratio of the energy, possess larger application potential at different traffic and transport fields such as automobile-used, peculiar to vessel, aviations.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of double-source dynamic system and energy control method thereof are provided, while guarantee meets communications and transportation complex working condition power change demand, improve the capacity usage ratio of power system further.
Object of the present invention can be achieved through the following technical solutions:
A kind of double-source dynamic system, comprising:
Internal-combustion engine: as main power source, establishes exhaust unit and cooling unit in it;
Cryogenic fluid storage tank: internal storage cryogenic fluid, as secondary power source;
Heat exchanger: be connected with the exhaust unit of internal-combustion engine and cooling unit, and be connected with cryogenic fluid storage tank, receive cryogenic fluid, heat exchanger conducts heat to the exhaust of exhaust unit, the cooling water of cooling unit and cryogenic fluid, reduce exhaust and cooling water temperature, heating and gasifying is carried out to cryogenic fluid simultaneously, make its formation pressurized gas that expand;
Turbine: be connected with heat exchanger and internal-combustion engine, suction port receives the pressurized gas flowed out from heat exchanger, and air outlet is connected with internal-combustion engine, and pressurized gas thermal power transfer is become mechanical energy;
Motor: be connected with turbine, generates electricity by turbine drives or outwards does work, and mechanical energy is stored as electric energy, or utilizes mechanical energy outwards to do work.
Cryogenic fluid storage tank and heat exchanger connecting pipeline are provided with cryopump and flowmeter, and between heat exchanger and turbine, connecting pipeline is provided with pressure meter and the first control valve, and between turbine and internal-combustion engine, connecting pipeline is provided with the second control valve,
Described cryopump, flowmeter, pressure meter, the first control valve and the second control valve are connected with electronic controller simultaneously, described electronic controller receives flowmeter and manometric feedback signal, and controls the open/close states of cryopump, the first control valve and the second control valve or open size.Flowmeter can the gas consumption amount of Real-Time Monitoring cryogenic fluid, characterizes the use amount of cryogenic fluid and the surplus of cryogenic fluid.Pressure meter can outlet pressure before Real-Time Monitoring turbine, characterizes the expansion status after cryogenic fluid gasification.Each control valve can control cryogenic fluid and externally whether export break-make, regulates stream pressure and speed, optional power taking magnetic-type, electronic type, mechanical type.
Power system also comprises air-conditioning, and this air-conditioning is connected with the cooling unit of internal-combustion engine, and receive cooling unit heat energy and heat, air-conditioning is also connected with the air outlet of turbine, receives giving vent to anger of turbine and freezes.
Between air-conditioning and the cooling unit of internal-combustion engine, connecting pipeline is provided with the 4th control valve, and the air outlet connecting pipeline of air-conditioning and turbine is provided with the 3rd control valve.
Described internal-combustion engine comprises two-stroke or four-stroke conventional gasoline machine or diesel engine, the motor that also to comprise with methyl alcohol, ethanol, rock gas, liquefied petroleum gas (LPG) or biodiesel be alternative energy source.
The cryogenic fluid of cryogenic fluid storage tank internal storage comprises liquid nitrogen, liquid helium, liquefied air or dry ice.
Comprise the heat exchange structure of two series connection in described heat exchanger, be connected with exhaust unit and cooling unit respectively.
Described cryogenic fluid storage tank is heat insulation, high temperature resistant, that antidetonation is uprising sealed shell of tank, bottle or casing, and the material selected comprises steel, carbon fiber or alloy.
A controlling method for double-source dynamic system, comprises the following steps:
(1) after internal combustion engine starts, electronic controller controls cryopump running, cryogenic fluid is pumped into heat exchanger, the exhaust of internal-combustion engine and cooling water is utilized to carry out heating and gasifying to cryogenic fluid, simultaneously cryogenic media conducts heat with exhaust and cooling water, reduces and is vented and can makes while cooling water temperature cryogenic media to expand further formation pressurized gas;
(2) when pressure meter testing pipes internal pressure arrives setting value, electronic controller controls the first control valve and opens, and pressurized gas flow to turbine, and turbine drives motor generates electricity or outwards does work, and realizes stored energy;
(3) when the timing of internal-combustion engine row temperature one, along with internal-combustion engine rotational speed increases, electronic controller controls cryopump running speed to be accelerated, and makes more cryogenic media enter heat exchanger, accelerates afterheat of IC engine and reclaims; Along with internal-combustion engine rotational speed reduces, it is slack-off that electronic controller controls cryopump running speed, makes less cryogenic media enter heat exchanger, ensureing the consumption reducing cryogenic media while afterheat of IC engine reclaims;
(4) when the internal combustion engine is stopped, electronic controller controls cryopump to be stopped to heat exchanger conveying capacity, controls the first control valve and closes, prevent air return generation frost.
When air-conditioning is opened, heating needs is that the 4th control valve is opened, and part cooling unit heat energy enters Air-conditioning Cycle, and during refrigeration demand, the 3rd control valve is opened, and cryogenic fluid enters Air-conditioning Cycle.
When motor needs the pinking of EGR cyclic inhibition or NO xduring discharge, the second control valve is opened, and a small amount of cryogenic fluid enters air-intake of combustion engine unit.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) system of the present invention is made up of major-minor two power sources, main power source is internal-combustion engine, secondary power source is cryogenic fluid storage tank, can recycle the exhaust heat of main power source and cooling unit heat, finally be converted to electric energy or auxiliary externally acting, whole system takes automatically controlled mode to control cryopump, regulates the supply of working medium.
(2) exhaust unit of traditional combustion engine and cooling unit are improved further, substantially increase efficiency of energy utilization, secondary power source improves power character and the Economy of total system further simultaneously, reduces system capacity discharge.
(3) adopt heat exchanger to realize cryogenic fluid endothermic gasification, gasification working medium expansion driven turbine rotation, drive electrical generators generates electricity or outwards does work.Simultaneously due to the reduction of I. C. engine exhaust temperature and exhaust back pressure, the pumping loss of internal-combustion engine can be decreased; The thermal loss of cooling unit is by effective recycling, thus entirety improves internal combustion engine thermal efficiency.
(4) the cryogenic fluid gas that turbine is discharged can be further used for the air-conditioning system air refrigeration of automobile.Its innovation is that cryogenic fluid gas can be introduced internal-combustion engine carrys out control combustion, namely can replace traditional combustion engine EGR and EGR intercooler equipment by its heat exchanger in addition.And this system can realize the decrease of noise functions of exhaust sound, improve the exhaust performance of traditional combustion engine.
(5) system of the present invention improves internal combustion engine thermal efficiency indirectly, improves system dynamic, Economy and emission performance, possesses larger application potential at different traffic and transport fields such as automobile-used, peculiar to vessel, aviations.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention;
Fig. 2 is control principle drawing of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of double-source dynamic system, as shown in Figure 1, comprises internal-combustion engine 9, cryogenic fluid storage tank 1, heat exchanger 3, turbine 7, motor 8 and air-conditioning 13.Internal-combustion engine 9, as main power source, establishes exhaust unit and cooling unit in it; Cryogenic fluid storage tank 1 internal storage cryogenic fluid, as secondary power source; Exhaust unit and the cooling unit of heat exchanger 3 and internal-combustion engine 9 are connected, and be connected with cryogenic fluid storage tank 1, receive cryogenic fluid, the exhaust of heat exchanger 3 pairs of exhaust units, the cooling water of cooling unit and cryogenic fluid conduct heat, reduce exhaust and cooling water temperature, heating and gasifying is carried out to cryogenic fluid simultaneously, make its formation pressurized gas that expand; Turbine 7 is connected with heat exchanger 3 and internal-combustion engine 9, and suction port receives the pressurized gas flowed out from heat exchanger 3, and air outlet is connected with internal-combustion engine 9, and pressurized gas thermal power transfer is become mechanical energy; Motor 8 is connected with turbine 7, generates electricity or outwards does work, mechanical energy is stored as electric energy, or utilizes mechanical energy outwards to do work by turbine 7 drives.Air-conditioning 13 is connected with the cooling unit of internal-combustion engine 9, and receive cooling unit heat energy and heat, air-conditioning 13 is also connected with the air outlet of turbine 7, receives giving vent to anger and freezing of turbine 7.
Cryogenic fluid storage tank 1 and heat exchanger 3 connecting pipeline are provided with cryopump 2 and flowmeter 4, between heat exchanger 3 and turbine 7, connecting pipeline is provided with pressure meter 5 and the first control valve 6, between turbine 7 and internal-combustion engine 9, connecting pipeline is provided with the second control valve 12, and cryopump 2, flowmeter 4, pressure meter 5, first control valve 6 and the second control valve 12 are connected with electronic controller 10 simultaneously.
As shown in Figure 2, electronic controller 10 receives the feedback signal of flowmeter 4 and pressure meter 5, and controls the open/close states of cryopump 2, first control valve 6 and the second control valve 12 or open size.
Between the cooling unit of air-conditioning 13 and internal-combustion engine 9, connecting pipeline is provided with the 4th control valve 14, and air-conditioning 13 is provided with the 3rd control valve 12 with the air outlet connecting pipeline of turbine 7.
Flowmeter 4 can the gas consumption amount of Real-Time Monitoring cryogenic fluid, characterizes the use amount of cryogenic fluid and the surplus of cryogenic fluid.Pressure meter 5 can outlet pressure before Real-Time Monitoring turbine, characterizes the expansion status after cryogenic fluid gasification.Each control valve can control cryogenic fluid and externally whether export break-make, regulates stream pressure and speed, optional power taking magnetic-type, electronic type, mechanical type.
Internal-combustion engine 9 comprises two-stroke or four-stroke conventional gasoline machine or diesel engine, the motor that also to comprise with methyl alcohol, ethanol, rock gas, liquefied petroleum gas (LPG) or biodiesel be alternative energy source.
The cryogenic fluid of cryogenic fluid storage tank 1 internal storage comprises liquid nitrogen, liquid helium, liquefied air or dry ice.
Comprise the heat exchange structure 3.1 and 3.2 of two series connection in heat exchanger 3, be connected with exhaust unit and cooling unit respectively.
Cryogenic fluid storage tank 1 is heat insulation, high temperature resistant, that antidetonation is uprising sealed shell of tank, bottle or casing, and the material selected comprises steel, carbon fiber or alloy.
A controlling method for double-source dynamic system, comprises the following steps:
(1) after internal-combustion engine 9 work starts, electronic controller 10 controls cryopump 2 and operates, cryogenic fluid is pumped into heat exchanger 3, the exhaust of internal-combustion engine 9 and cooling water is utilized to carry out heating and gasifying to cryogenic fluid, simultaneously cryogenic media conducts heat with exhaust and cooling water, reduces and is vented and can makes while cooling water temperature cryogenic media to expand further formation pressurized gas;
(2) when pressure meter 5 testing pipes internal pressure arrives setting value, electronic controller 10 controls the first control valve 6 and opens, and pressurized gas flow to turbine 7, and turbine 7 drive motor 8 generates electricity or outwards does work, and realizes stored energy;
(3) when temperature one timing arranged by internal-combustion engine 9, along with internal-combustion engine 9 rotating speed increases, electronic controller 10 controls cryopump 2 running speed to be accelerated, and makes more cryogenic media enter heat exchanger 3, accelerates internal-combustion engine 9 heat recovery; Along with internal-combustion engine 9 rotating speed reduces, it is slack-off that electronic controller 10 controls cryopump 2 running speed, makes less cryogenic media enter heat exchanger 3, reduces the consumption of cryogenic media while ensureing internal-combustion engine 9 heat recovery;
(4) when internal-combustion engine 9 stops, electronic controller 10 controls cryopump 2 and stops to heat exchanger 3 conveying capacity, controls the first control valve 6 and closes, prevent air return generation frost.
When air-conditioning 13 is opened, heating needs is that the 4th control valve 14 is opened, and part cooling unit heat energy enters air-conditioning 13 and circulates, and during refrigeration demand, the 3rd control valve 12 is opened, and cryogenic fluid enters air-conditioning 13 and circulates.
When motor needs the pinking of EGR cyclic inhibition or NO xduring discharge, the second control valve 11 is opened, and a small amount of cryogenic fluid enters internal-combustion engine 9 air admission unit.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.

Claims (8)

1. a double-source dynamic system, is characterized in that, comprising:
Internal-combustion engine (9): as main power source, establishes exhaust unit and cooling unit in it;
Cryogenic fluid storage tank (1): internal storage cryogenic fluid, as secondary power source;
Heat exchanger (3): be connected with the exhaust unit of internal-combustion engine (9) and cooling unit, and be connected with cryogenic fluid storage tank (1), receive cryogenic fluid, heat exchanger (3) conducts heat to the exhaust of exhaust unit, the cooling water of cooling unit and cryogenic fluid, reduce exhaust and cooling water temperature, heating and gasifying is carried out to cryogenic fluid simultaneously, make its formation pressurized gas that expand;
Turbine (7): be connected with heat exchanger (3) and internal-combustion engine (9), suction port receives the pressurized gas flowed out from heat exchanger (3), air outlet is connected with internal-combustion engine (9), and pressurized gas thermal power transfer is become mechanical energy;
Motor (8): be connected with turbine (7), generates electricity by turbine (7) drives or outwards does work, mechanical energy being stored as electric energy, or utilizing mechanical energy outwards to do work;
Cryogenic fluid storage tank (1) and heat exchanger (3) connecting pipeline are provided with cryopump (2) and flowmeter (4), between heat exchanger (3) and turbine (7), connecting pipeline is provided with pressure meter (5) and the first control valve (6), between turbine (7) and internal-combustion engine (9), connecting pipeline is provided with the second control valve (12)
Described cryopump (2), flowmeter (4), pressure meter (5), the first control valve (6) and the second control valve (12) are connected with electronic controller (10) simultaneously, described electronic controller (10) receives the feedback signal of flowmeter (4) and pressure meter (5), and controls the open/close states of cryopump (2), the first control valve (6) and the second control valve (12) or open size.
2. a kind of double-source dynamic system according to claim 1, it is characterized in that, power system also comprises air-conditioning (13), this air-conditioning (13) is connected with the cooling unit of internal-combustion engine (9), receive cooling unit heat energy and heat, air-conditioning (13) is also connected with the air outlet of turbine (7), receives giving vent to anger and freezing of turbine (7).
3. a kind of double-source dynamic system according to claim 2, it is characterized in that, between the cooling unit of air-conditioning (13) and internal-combustion engine (9), connecting pipeline is provided with the 4th control valve (14), and air-conditioning (13) is provided with the 3rd control valve (12) with the air outlet connecting pipeline of turbine (7).
4. a kind of double-source dynamic system according to claim 1, it is characterized in that, described internal-combustion engine (9) comprises two-stroke or four-stroke conventional gasoline machine or diesel engine, the motor that also to comprise with methyl alcohol, ethanol, rock gas, liquefied petroleum gas (LPG) or biodiesel be alternative energy source.
5. a kind of double-source dynamic system according to claim 1, is characterized in that, the cryogenic fluid of cryogenic fluid storage tank (1) internal storage comprises liquid nitrogen, liquid helium, liquefied air or dry ice.
6. a kind of double-source dynamic system according to claim 1, is characterized in that, comprises the heat exchange structure of two series connection, be connected respectively with exhaust unit and cooling unit in described heat exchanger (3).
7. a kind of double-source dynamic system according to claim 1, it is characterized in that, described cryogenic fluid storage tank (1) is heat insulation, high temperature resistant, that antidetonation is uprising sealed shell of tank, bottle or casing, and the material selected comprises steel, carbon fiber or alloy.
8. a controlling method for double-source dynamic system as claimed in claim 1, is characterized in that, comprise the following steps:
(1) after internal-combustion engine (9) work starts, electronic controller (10) controls cryopump (2) running, cryogenic fluid is pumped into heat exchanger (3), the exhaust of internal-combustion engine (9) and cooling water is utilized to carry out heating and gasifying to cryogenic fluid, simultaneously cryogenic media conducts heat with exhaust and cooling water, reduces and is vented and can makes while cooling water temperature cryogenic media to expand further formation pressurized gas;
(2) when pressure meter (5) testing pipes internal pressure arrives setting value, electronic controller (10) controls the first control valve (6) and opens, pressurized gas flow to turbine (7), turbine (7) drive motor (8) generates electricity or outwards does work, and realizes stored energy;
(3) when the timing of internal-combustion engine (9) row temperature one, along with internal-combustion engine (9) rotating speed increases, electronic controller (10) controls cryopump (2) running speed to be accelerated, make more cryogenic media enter heat exchanger (3), accelerate internal-combustion engine (9) heat recovery; Along with internal-combustion engine (9) rotating speed reduces, it is slack-off that electronic controller (10) controls cryopump (2) running speed, make less cryogenic media enter heat exchanger (3), while ensureing internal-combustion engine (9) heat recovery, reduce the consumption of cryogenic media;
(4) when internal-combustion engine (9) stops, electronic controller (10) controls cryopump (2) to be stopped to heat exchanger (3) conveying capacity, control the first control valve (6) to close, prevent air return generation frost.
CN201410478973.6A 2014-09-18 2014-09-18 A kind of double-source dynamic system and controlling method thereof Expired - Fee Related CN104389648B (en)

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CN107237980A (en) * 2017-07-13 2017-10-10 荆门宏图特种飞行器制造有限公司 Gasifying liquefied petroleum gas electric power system
CN108343477A (en) * 2018-01-30 2018-07-31 南京普国科技有限公司 A kind of efficient automobile pressure-air turbine generator
CN109050201B (en) * 2018-08-24 2021-09-24 吉林大学 Heat pump type automobile air conditioning system with emergency quick-charging cooling mode
CN109578100A (en) * 2018-12-26 2019-04-05 天津大学 A kind of heat exchange-power generation integrated system and control method using liquid nitrogen

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JP2005345084A (en) * 2004-06-04 2005-12-15 Shigeto Matsuo Exhaust heat recovering refrigeration air conditioning system
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