CN201891524U - Engine exhaust afterheat utilization system based on single-screw expansion machine - Google Patents
Engine exhaust afterheat utilization system based on single-screw expansion machine Download PDFInfo
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- CN201891524U CN201891524U CN2010206501612U CN201020650161U CN201891524U CN 201891524 U CN201891524 U CN 201891524U CN 2010206501612 U CN2010206501612 U CN 2010206501612U CN 201020650161 U CN201020650161 U CN 201020650161U CN 201891524 U CN201891524 U CN 201891524U
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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
Abstract
The utility model discloses an engine exhaust afterheat utilization system based on a single-screw expansion machine, which belongs to the field of energy saving and emission reduction and consists of four modules: a heat source flowing module, an organic Rankine cycle closed loop module, a cooling system closed loop module and a control module. The engine exhaust afterheat utilization system can automatically invoke program in a single chip computer for regulating the opening angle of a voltage proportion control valve to realize different grades of afterheat recovery according to data measured through a temperature and flow rate sensor under different work conditions of an engine, and the heat in the engine exhaust can be recovered and used to the maximum degree.
Description
Technical field
The engine exhaust heat that the utility model relates to based on single-screw expander utilizes system, is mainly used in to reclaim the heat that engine exhaust is taken away, and belongs to the energy-saving and emission-reduction field.
Background technique
Great deal of experiment data shows that the output power of motor only accounts for about 1/3rd of fuel combustion energy, and remaining heat of about 2/3rds is taken away by cooling water, exhaust and other modes are lost.Wherein the heat taken away of exhaust tail gas accounts for about 1/3rd of fuel combustion energy, reclaims engine exhaust heat and can improve fuel combustion energy utilization ratio in the motor.The research of reclaiming at present engine exhaust heat mainly contains gas-fired heat pump (GHP) system, adopt the absorption type refrigerating unit of thermoelectric coupling to be used for freezing and waste gas that heating, motor are discharged enters directly that heating condensate water drives systems such as steam turbine engine acting, waste gas residual heat formula heating plant in the exhaust boiler.There are following characteristics in above-mentioned heat recovery system:
The characteristics of gas-fired heat pump (GHP) are to set up a cover water circulation system, absorb the heat of engine exhaust by low temperature water in heat exchanger, make low temperature water be converted into high-temperature water, finally realize the recovery of engine exhaust heat.The shortcoming of this cover system is that efficient is low, stores because this system can only be converted into the exhaust heat of motor the heat energy of water, can not carry out output power with power mode; And specific heat of water to hold relative organic working medium bigger, the required energy of unit temperature rise is big, and is lower for the recovery rate of energy.
Adopt the absorption type refrigerating unit of thermoelectric coupling to be used for freezing and heating, thereby reclaim the exhaust heat of motor.The purpose that adopts thermoelectric coupling is in order to adapt to the characteristics of motor different rotating speeds different load variable working condition, to have increased a pressurized machine and can efficiently electric energy be converted into the problem that heat energy is used for compensating the fume afterheat deficiency.This mode makes the absorption type refrigerating unit system under the working condition of the little load of the slow-speed of revolution, because the waste heat deficiency of exhaust, refrigerating capacity does not reach the requirement of system, therefore needs to consume extra electric energy and compensates, and the reuse efficiency of energy obviously reduces.Therefore the shortcoming of native system is to need to increase extra power consumption under the little load condition of the slow-speed of revolution.
The waste gas that motor is discharged directly enters heating condensate water in the exhaust boiler, and the steam of generation at first needs to rotate through driving steam turbine engine behind steam heated oven and the moisture trap again.This covering device need satisfy the work operating mode of steam turbine engine, needs steam heated oven and moisture trap just can produce dry gas and promotes turbine engine work, increases the parts of system.And the Economy of this covering device need be embodied in power plant is that 750kw is just more remarkable when above, so this covering device is inapplicable for low power motor.Therefore native system need increase extra equipment dry steam, increases the complexity of system.
Waste gas residual heat formula heating plant is to utilize the waste heat of engine exhaust pipe to carry out compartment heating, mainly is to utilize the exhaust product heat cal rod to reclaim exhaust heat to carry out heat supply in winter.The main shortcoming of this cover system is the back pressure that can increase exhaust, can influence the power character of motor, in addition when motor is in the working condition of the little load of the slow-speed of revolution, shortage of heat in the exhaust is to provide the compartment needed heating load, if and outlet pipe leaks, can pollute the air in the car, human body is damaged.Therefore native system is not suitable for the operating mode of the little load of the slow-speed of revolution, and certain potential safety hazard is arranged.
As can be seen from the above analysis, the inapplicable scope of mentioned system mainly is to be variable speed varying load condition and low-powered engine, and adopts water as decompressor certain narrow limitation to be arranged all as working medium and employing turbine engine.
The model utility content
The purpose of this utility model is to become the heat that the engine exhaust heat under the lotus operating mode is taken away in order to reclaim variable speed, and has proposed the scheme that a kind of exhaust heat based on single-screw expander utilizes system.This scheme can realize being under the different rotating speeds different load variable working condition condition and during low-powered engine when motor, under the situation that does not influence the motor proper functioning, significantly improve the recovery rate of engine exhaust heat, thereby improve the fuel economy of diesel engine and the complex energy utilization ratio of diesel engine.
In order to realize above-mentioned target, the utility model has adopted following technological scheme:
Engine exhaust heat based on single-screw expander utilizes system, and this system is by thermal source flow module, organic Rankine circuit closed-loop path module, cooling system closed-loop path module, and four modules of control module are formed.
Above-mentioned thermal source flow module: the outlet pipe of motor 1 and bundled tube vaporizer 2 connect to form the thermal source flow module of system by pipeline.
Above-mentioned organic Rankine circuit closed-loop path module: bundled tube vaporizer 2, single-screw expander 3, plate type condenser 4, liquid container 5 join end to end by pipeline successively and form the closed-loop path module of organic Rankine cycle.
Above-mentioned cooling system closed-loop path module: plate type condenser 4, cooling tower 7 and water pump 8 join end to end by pipeline successively and constitute the closed-loop path module of cooling system.
Above-mentioned control module: flow transducer 14 is connected on the engine exhaust pipeline with temperature transducer 15, voltage ratio control valve I 9 is installed on the pipeline of bundled tube vaporizer 2 inlets, and voltage ratio control valve II 11 is installed on the pipeline in water pump 8 outlet ports; Flow transducer 14, temperature transducer 15, voltage ratio control valve I 9 and voltage ratio control valve II 11 all link to each other with single-chip microcomputer 13.
Safety valve I 10 is installed on the triplate line between plunger pump 6 and the voltage ratio control valve I 9, wherein the liquid-discharging tube of safety valve I 10 is connected on the liquid container 5, safety valve II 12 is installed on the triplate line between water pump 8 and the plate type condenser 4, and wherein the waste pipe of safety valve II 12 is connected in the cooling tower 7.
Adopt the voltage ratio control valve to come the changes in flow rate of control system in this system.
Adopt single-screw expander and organic rankine cycle system to realize the operation of whole system in this system.
Adopt safety valve to guarantee the Security of whole system in this system.
Compare with existing technology, of the present utility model have a following advantage:
The utility model adopts organic rankine cycle system to reclaim engine exhaust heat.This system can reclaim low-grade energy, because organic gasification latent heat is more much lower than water, not only can make organic substance be converted into saturated gaseous state from liquid state after absorbing less heat, and organic evaporating temperature is lower with respect to water.Therefore this system is fit to reclaim the engine exhaust energy of low temperature, small flow.
The utility model adopts the control system that is made of flow transducer, temperature transducer, voltage ratio control valve, single-chip microcomputer to control the mass flow rate of organic working medium in the whole system, can realize that motor reclaims the exhaust energy of motor to greatest extent under different rotating speeds different load variable working condition condition.
The utility model adopts single-screw expander as organic Rankine circuit expansion motive power machine, and its principle is that steam enters the machine internal spline, and lead-screw rotates.Along with screw rod rotates, the volume between teeth groove increases gradually, and medium step-down cooling is expanded and done work, and discharges from teeth groove is terminal at last.Power is exported from headscrew, drives generator for electricity generation.This decompressor has good power out-put characteristic and temperature drop characteristic, and its power range has overcome the defective that traditional steam turbine and gas turbine can not be too little in 1kW～1000kW scope; The steam of steam turbine can only be superheated vapor and saturated vapor, and screw expansion motor can be superheated vapor, saturated vapour, vapour-liquid two-phase or hydrothermal solution; Screw expansion motor can be by adopting the working medium of different boiling, and its serviceability temperature scope can be from 70 ℃ to 250 ℃, thus screw expansion motor be a kind of in low-temperature electricity-generating equipment, be particularly suitable for cogeneration, solar energy and geothermal power generation and use.
Description of drawings
Fig. 1 utilizes system schematic for the engine exhaust heat based on single-screw expander
Among the figure: the 1-motor; 2-bundled tube vaporizer; The 3-single-screw expander; The 4-plate type condenser; The 5-liquid container; The 6-plunger pump; The 7-cooling tower; The 8-water pump; 9-voltage ratio control valve I; 10-safety valve I; 11-voltage ratio control valve II; 12-safety valve II; The 13-single-chip microcomputer; The 14-flow transducer; The 15-temperature transducer.
Embodiment
Based on the not high characteristics of engine exhaust energy, the utility model mainly adopts the energy in the single-screw expander organic rankine cycle system recovery engine exhaust; Based on the characteristics of motor different rotating speeds different load variable working condition, the utility model mainly adopts single-chip microcomputer to receive and dispatch the engine exhaust energy back and forth according to the change of the numerical control organic working medium flow of measured engine exhaust temperature of sensor and flow and the change of cooling water flow.
Engine exhaust heat based on single-screw expander of the present utility model utilizes system, mainly comprises motor 1, bundled tube vaporizer 2, single-screw expander 3, plate type condenser 4, liquid container 5, plunger pump 6, cooling tower 7, water pump 8, voltage ratio control valve I 9, safety valve I 10, voltage ratio control valve II 11, safety valve II 12, single-chip microcomputer 13, flow transducer 14, temperature transducer 15 and various connecting pipeline and connecting circuit.The annexation of each parts of internal system is as follows: the outlet pipe of motor 1 and bundled tube vaporizer 2 connect to form thermal source flow module in the bootstrap system by pipeline; Bundled tube vaporizer 2, single-screw expander 3, plate type condenser 4, liquid container 5 join end to end by pipeline successively and form the closed-loop path module of organic Rankine cycle; Plate type condenser 4, cooling tower 7 and water pump 8 join end to end by pipeline successively and constitute the closed-loop path module of cooling system; Single-chip microcomputer 13, flow transducer 14, temperature transducer 15, voltage ratio control valve I 9 and voltage ratio control valve II 11 link to each other by datawire and constitute the control system module of whole circulation system, concrete Placement is as follows: flow transducer 14 is connected on the engine exhaust pipeline with temperature transducer 15, voltage ratio control valve I 9 is installed on the pipeline of bundled tube vaporizer 2 inlets, and voltage ratio control valve II 11 is installed on the pipeline in water pump 8 outlet ports; Security for whole system, need to increase safety valve, safety valve I 10 is installed on the triplate line between plunger pump 6 and the voltage ratio control valve I 9, wherein the liquid-discharging tube of safety valve I 10 is connected on the liquid container 5, safety valve II 12 is installed on the triplate line between water pump 8 and the plate type condenser 4, wherein the waste pipe of safety valve II 12 is connected in the cooling tower 7, as shown in Figure 1.
Be accompanying drawings when working as engine operation below, concrete runnability of the present utility model.
At first carry out theoretical circulation and calculate, can calculate organic working medium flow and cooling water flow corresponding to different engine exhaust temperatures and extraction flow the best constantly.Draw corresponding to different delivery temperatures and the extraction flow best organic working medium flow constantly and the MAP figure of cooling water flow according to result of calculation, and this MAP figure is input in the single-chip microcomputer.
As shown in Figure 1, when engine operation, the delivery temperature that single-chip microcomputer measures according to flow transducer 14 and temperature transducer 15 and the data of flow, call the data of MAP figure, the unlatching size of control voltage ratio control valve I 9 and voltage ratio control valve II 11, can control the flow of organic working medium and the flow of cooling water, so this cover system can be adapted to the characteristics of motor variable working condition.Concrete mobility status is as follows:
Organic working medium absorbs the heat that motor exhaust discharged and is converted into gas in bundled tube vaporizer 2, the gas that produces promotes single-screw expander 3 expansion actings, the organic working medium decrease temperature and pressure is converted into weary gas, discharging heat in plate type condenser 4 after, weary gas forms liquid, after the liquid that forms enters into liquid container 5, carry out the circulation of a new round again in the bundled tube vaporizer 2 by plunger pump 6 pumps.In plate type condenser 4, cooling water absorbs and enters into cooling tower 7 after temperature raises behind the heat that the weary gas of working medium discharged and cool off, and extracts cooling water in the cooling towers 7 by water pump 8 again and enters into plate type condenser 4 and carry out the circulation of a new round at last.In whole system, need set respectively with the safety value of safety valve II 12 safety valve I 10, in the pressure range of safety, work with water cycle to guarantee the organic working medium circulation, guarantee the safety of system.Pressure in organic working medium circulation surpasses the setting value of safety valve I 10, and safety valve I 10 will open and carry out earial drainage, and the worker quality liquid of earial drainage is recovered in the liquid container 5 by pipeline.Pressure in the cooling water circulation surpasses the setting value of safety valve II 12, and safety valve II 12 will open and carry out earial drainage, and the water of earial drainage is recovered in the cooling tower 7 by pipeline.
Claims (1)
1. the engine exhaust heat based on single-screw expander utilizes system, it is characterized in that: this system is by thermal source flow module, organic Rankine circuit closed-loop path module, cooling system closed-loop path module, and four modules of control module are formed,
Described thermal source flow module: the outlet pipe of motor (1) and bundled tube vaporizer (2) connect to form the thermal source flow module of system by pipeline;
Described organic Rankine circuit closed-loop path module: bundled tube vaporizer (2), single-screw expander (3), plate type condenser (4), liquid container (5) join end to end by pipeline successively and form the closed-loop path module of organic Rankine cycle;
Described cooling system closed-loop path module: plate type condenser (4), cooling tower (7) and water pump (8) join end to end by pipeline successively and constitute the closed-loop path module of cooling system;
Described control module: flow transducer (14) is connected on the engine exhaust pipeline with temperature transducer (15), voltage ratio control valve I (9) is installed on the pipeline of bundled tube vaporizer (2) inlet, and voltage ratio control valve II (11) is installed on the pipeline in water pump (8) outlet port; Flow transducer (14), temperature transducer (15), voltage ratio control valve I (9) and voltage ratio control valve II (11) all link to each other with single-chip microcomputer (13);
Safety valve I (10) is installed on the triplate line between plunger pump (6) and the voltage ratio control valve I (9), wherein the liquid-discharging tube of safety valve I (10) is connected on the liquid container (5), safety valve II (12) is installed on the triplate line between water pump (8) and the plate type condenser (4), and wherein the waste pipe of safety valve II (12) is connected in the cooling tower (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206501612U CN201891524U (en) | 2010-12-03 | 2010-12-03 | Engine exhaust afterheat utilization system based on single-screw expansion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206501612U CN201891524U (en) | 2010-12-03 | 2010-12-03 | Engine exhaust afterheat utilization system based on single-screw expansion machine |
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| Publication Number | Publication Date |
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| CN201891524U true CN201891524U (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206501612U Expired - Lifetime CN201891524U (en) | 2010-12-03 | 2010-12-03 | Engine exhaust afterheat utilization system based on single-screw expansion machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094690A (en) * | 2010-12-03 | 2011-06-15 | 北京工业大学 | Engine exhaust gas and waste heat utilization system based on single-screw expansion engine |
| CN106246268A (en) * | 2016-10-10 | 2016-12-21 | 哈尔滨工业大学（威海） | A kind of engine residual heat integrative recovery system |
| CN106321172A (en) * | 2015-06-30 | 2017-01-11 | 阿耐思特岩田株式会社 | Binary power generation system and binary power generation method |
| CN108333299A (en) * | 2017-12-28 | 2018-07-27 | 同济大学 | A kind of marine main engine discharges pollutants quick precise testing device and method |
-
2010
- 2010-12-03 CN CN2010206501612U patent/CN201891524U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094690A (en) * | 2010-12-03 | 2011-06-15 | 北京工业大学 | Engine exhaust gas and waste heat utilization system based on single-screw expansion engine |
| CN102094690B (en) * | 2010-12-03 | 2013-10-02 | 北京工业大学 | Engine exhaust gas and waste heat utilization system based on single-screw expansion engine |
| CN106321172A (en) * | 2015-06-30 | 2017-01-11 | 阿耐思特岩田株式会社 | Binary power generation system and binary power generation method |
| CN106246268A (en) * | 2016-10-10 | 2016-12-21 | 哈尔滨工业大学（威海） | A kind of engine residual heat integrative recovery system |
| CN106246268B (en) * | 2016-10-10 | 2018-05-01 | 哈尔滨工业大学（威海） | A kind of engine residual heat integrative recovery system |
| CN108333299A (en) * | 2017-12-28 | 2018-07-27 | 同济大学 | A kind of marine main engine discharges pollutants quick precise testing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110706 Effective date of abandoning: 20131002 |
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| RGAV | Abandon patent right to avoid regrant |