CN105587426B - Thermoelectric conversion system capable of keeping engine heat and backpressure balanced and monitoring method - Google Patents
Thermoelectric conversion system capable of keeping engine heat and backpressure balanced and monitoring method Download PDFInfo
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- CN105587426B CN105587426B CN201510938566.3A CN201510938566A CN105587426B CN 105587426 B CN105587426 B CN 105587426B CN 201510938566 A CN201510938566 A CN 201510938566A CN 105587426 B CN105587426 B CN 105587426B
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- water valve
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- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a thermoelectric conversion system capable of keeping engine heat and backpressure balanced and a monitoring method. Cooling fin pipelines are fully used for precooling of cooling water, and secondary cooling of the cooling water is conducted after heat exchange of thermoelectric device sets. On the one hand, the temperature of the cold end of a heat exchanger can be decreased to a great extent, and on the other hand, the thermal balance of an original cooling system is kept. In addition, a self-operated upstream pressure regulating valve and auxiliary equipment thereof are adopted for controlling the tail gas backpressure of an outlet of an engine exhaust manifold to be consistent with a pressure value when the heat exchanger is not connected as much as possible, so that the backpressure balance of an engine is achieved while tail gas waste heat is recovered for electricity generation. According to the thermoelectric conversion system, the power consumption of an auxiliary system is not increased, and the tail gas waste heat can be efficiently recovered for electricity generation on the premise that the thermal balance and the backpressure balance of the engine are kept so that the thermoelectric conversion system can be widely applied to occasions of traditional fuel engine tail gas thermoelectric conversion recycling, is clean, efficient and free of pollution and has good energy-saving and emission-reducing prospects.
Description
Technical field
The invention belongs to energy-conservation and new-energy automobile field, and in particular to a kind of holding heat of engine and back-pressure balance
Thermoelectric conversion system and monitoring method.
Background technology
The fuel oil energy about 30% of conventional fuel oil electromotor is discharged in the way of tail gas waste heat, causes huge energy wave
Take, using thermoelectric generation technology reclaim tail gas waste heat carry out generate electricity supply onboard system using be improve its fuel economy one
Individual important channel.The power of thermo-electric conversion is directly proportional to the temperature difference at the cold and hot end of each thermo-electric device, at present, existing most of vapour
Tail gas thermoelectric conversion system adds cooling fan mode that cooling down control thermoelectricity is carried out to cooling water using outer loop water pump
The cold junction temperature of device, consumes a large amount of electric energy, and the electric energy for sometimes consuming reclaims tail gas waste heat more than thermo-electric device and produces
Raw electricity, so causes system whole efficiency low.Additionally, the exhaust pipe of engine is connected with heat exchanger not doing at back pressure
Reason, internal heat exchanger flow field structure increase the original tail gas back pressure of electromotor, reduce the original dynamic property of electromotor, fuel oil
Economy and discharge performance, although in this case thermo-electric device reclaim tail gas waste heat generate electric energy, be also do not repay
Lose.
The content of the invention
The purpose of the present invention is aiming at the deficiency of above-mentioned technology, there is provided a kind of holding heat of engine and back-pressure balance
Thermoelectric conversion system and monitoring method, had both realized the requirement of motor exhaust Waste Heat Recovery generating, had maintained electromotor again cold
But the thermal balance and engine back pressure of system are stablized.
For achieving the above object, the tail gas thermo-electric conversion system for keeping heat of engine and back-pressure balance designed by the present invention
System, the monitoring unit being connected including thermoelectric converting unit and with the thermoelectric converting unit, the thermoelectric converting unit include sending out
Motivation and the heat exchanger being connected with the electromotor by exhaust manifold, the cooling system of the electromotor by pressure regulator valve with
The entrance of main fin pipeline is connected, and the outlet of the main fin pipeline is divided into two-way, all the way with the first multiple row cooling water tank
The entrance of group is connected, and another road is connected with the entrance of the second multiple row cooling water tank group, the first multiple row cooling water tank group and the
The cold end of one low temperature thermoelectric unit part group is connected, the cold end phase of the second multiple row cooling water tank group and the second low temperature thermoelectric unit part group
Even, the hot junction of the first low temperature thermoelectric unit part group is connected with the heat exchanger upper surface, the second low temperature thermoelectric unit part
The hot junction of group is connected with the heat exchanger lower surface, and the outlet of the first multiple row cooling water tank group and second multiple row are cold
But the outlet of water tank group is divided into two-way after being connected, and leads up to the first water valve and is connected with the entrance of utilidor, separately leads up to
Water valve is connected with the entrance of at least one secondary fin pipeline, the outlet phase of the outlet of the utilidor and secondary fin pipeline
It is connected with the entrance of cooling system after even；
The exhaust manifold of the electromotor is connected with filter through the first stop valve, the outlet of the filter with rely on oneself
The entrance of formula upstream-pressure controller is connected, the outlet of the self-operated type upstream-pressure controller and the entrance phase of the second stop valve
Even, the outlet of second stop valve is divided into two-way, is connected with the entrance of the heat exchanger all the way, another road and bypass valve
Entrance is connected, and the outlet of the bypass valve is connected with the exhaust manifold outlet of the electromotor.
Further, the secondary fin pipeline adopts three, the respectively first secondary fin pipeline, the second secondary fin
Pipeline and the 3rd secondary fin pipeline, the length of the length of the first secondary fin pipeline less than the second secondary fin pipeline, second
Length of the length of secondary fin pipeline less than the 3rd secondary fin pipeline；The outlet of the first multiple row cooling water tank group and institute
State the second multiple row cooling water tank group outlet be connected after respectively by the second water valve and the first pair fin pipeline communication, the 3rd water
Valve and the second secondary fin pipeline communication, the 4th water valve and the 3rd secondary fin pipeline communication.
Further, be provided with temperature sensor T1 between the cooling system and the pressure regulator valve, the pressure regulator valve with
Pressure transducer P1 is provided between the main hot channel, the outlet of the main hot channel divides after temperature sensor T2
For two-way, the outlet of the first multiple row cooling water tank group be connected with the outlet of the second multiple row cooling water tank group after Jing excess temperatures
T3 point of degree sensor is two-way, and after the outlet of the utilidor is connected with the outlet of the secondary fin pipeline, Jing excess temperatures are passed
Sensor T4 is connected with the entrance of the cooling system, entrance and the side of the exhaust manifold of the electromotor and first stop valve
Pressure transducer P2 is provided between the outlet of port valve, is arranged between the filter and the self-operated type upstream-pressure controller
The outlet for having pressure transducer P3, second stop valve is divided into two-way, first Low Temperature Thermal after pressure transducer P4
Voltage sensor V1 is connected between electrical part group and the second low temperature thermoelectric unit part group.
Further, lead to air after the outlet of the heat exchanger is connected with ternary catalyzing unit and acoustic filter successively.
Further, the monitoring unit includes microcontroller, D/A output modules, A/D modular converters and I/O moulds
Block, D/A output modules, A/D modular converters and I/O modules are connected with microcontroller；The D/A output modules with it is described
The signal control end of pressure regulator valve is connected；The input of the A/D modular converters and pressure transducer P1, pressure transducer P2, pressure
The signal output part of force transducer P3, pressure transducer P4 and voltage sensor V1 is connected, the I/O modules and temperature sensor
T1, temperature sensor T2, temperature sensor T3, temperature sensor T4, the first water valve, the second water valve, the 3rd water valve, the 4th water
The signal end of valve, the first stop valve, the second stop valve and bypass valve is connected.
Further, the monitoring unit includes host computer and the LCD module being connected with the microcontroller, described
Host computer and LCD module show the on off state of the various information and each valve of A/D modular converters collection in real time.
Further, the monitoring unit includes Zigbee module and the GPRS module being connected with the microcontroller,
The various information and the on off state of each valve that A/D modular converters are gathered by the Zigbee module and the GPRS module send
To remote monitoring center.
A kind of control method of the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance as described above, institute
State control method to comprise the steps：
Step 1：Tail gas pressure value P of the heat exchanger test engine in rated power is not connect ', using this value as foundation
The setting value of self-operated type upstream-pressure controller is set；
Step 2：The valve after enmgine exhaust and heat exchanger are connected, after engine start, while first section of control
Only valve, the second stop valve, the aperture of bypass valve, make the error between the value and P ' of pressure transducer P2 be less than 5%；
Step 3：After engine start, control pressure regulator valve is opened, if T3≤T1, the first water valve of control is opened, while control
The water valve being connected with secondary fin pipeline cuts out；If T1 is ＜ T3, the water valve for controlling to be connected with secondary fin pipeline is opened, same to time control
Make the closing of the first water valve.
Further, the secondary fin pipeline adopts three, the respectively first secondary fin pipeline, the second secondary fin
Pipeline and the 3rd secondary fin pipeline, the length of the length of the first secondary fin pipeline less than the second secondary fin pipeline, second
Length of the length of secondary fin pipeline less than the 3rd secondary fin pipeline；The outlet of the first multiple row cooling water tank group and institute
State the second multiple row cooling water tank group outlet be connected after respectively by the second water valve and the first pair fin pipeline communication, the 3rd water
Valve and the second secondary fin pipeline communication, the 4th water valve and the 3rd secondary fin pipeline communication；
The control method comprises the steps：
Step 1：Tail gas pressure value P of the heat exchanger test engine in rated power is not connect ', using this value as foundation
The setting value of self-operated type upstream-pressure controller is set；
Step 2：The valve after enmgine exhaust and heat exchanger are connected, after engine start, while first section of control
Only valve, the second stop valve, the aperture of bypass valve, make the error between the value and P ' of pressure transducer P2 be less than 5%；
Step 3：After engine start, control pressure regulator valve is opened, if T3≤T1, the first water valve of control is opened, while control
Second water valve, the 3rd water valve and the 4th water valve are closed；If 3 DEG C of 0 ＜ (T3-T1) ＜, the second water valve of control opens simultaneously control the
Three water valves, the 4th water valve and the first water valve are closed；If 3≤(T3-T1)≤5 DEG C, the 3rd water valve of control opens control first simultaneously
Water valve, the second water valve and the 4th water valve are closed；If (T3-T1) 5 DEG C of ＞, the 4th water valve of control open simultaneously control the first water valve,
Second water valve and the 3rd water valve are closed.
Compared with prior art, the present invention has advantages below：Fin pipeline is made full use of to carry out the advance of cooling water
Cooling, and cooling twice is done again after thermo-electric device group heat exchange, on the one hand can largely reduce heat exchanger
Cold junction temperature, on the other hand maintains the thermal balance of original cooling system again；Additionally, adopt self-operated type upstream pressure pressure regulator valve and
The tail gas back pressure and pressure value during not connected heat exchanger as far as possible of its auxiliary equipment control enmgine exhaust outlet
Cause, carrying out while tail gas waste heat is reclaimed and generated electricity, realizing the back-pressure balance of electromotor；
The system does not increase the power consumption of aid system, on the premise of Engine Heat Balance and back-pressure balance is kept also
Energy high efficiente callback tail gas waste heat is generated electricity, and can be widely applied to the field of conventional fuel oil motor exhaust thermo-electric conversion recycling
Close, and clean, it is efficient, pollution-free, with good energy-conservation with reduce discharging prospect.
Description of the drawings
Fig. 1 is the schematic diagram of the tail gas thermoelectric conversion system that the present invention keeps heat of engine and back-pressure balance；
Fig. 2 is the control method flow process of the tail gas thermoelectric conversion system that the present invention keeps heat of engine and back-pressure balance
Figure.
In figure, each part numbers are as follows：Electromotor 1, cooling system 2, pressure regulator valve 3, the 4, the first secondary radiating of main fin pipeline
Secondary the 6, the 3rd secondary fin pipeline 7, utilidor 8 of fin pipeline of piece pipeline 5, second, the second water valve 9, the 3rd water valve 10, the
Four water valves 11, the first water valve 12, the first multiple row cooling water tank group 13, the second multiple row cooling water tank group 14, the first low temperature thermoelectric unit
Part group 15, the second low temperature thermoelectric unit part group 16, heat exchanger 17, the first stop valve 18, filter 19, self-operated type upstream pressure are adjusted
Section valve 20, the second stop valve 21, ternary catalyzing unit 22, acoustic filter 23, D/A output modules 24, A/D modular converters 25, I/O modules
26th, bypass valve 27, LCD module 28, Zigbee module 29, GPRS module 30, USB module 31, sound and light alarm 32, host computer 33,
Clock module 34；
Temperature sensor T1, temperature sensor T2, temperature sensor T3, temperature sensor T4, pressure transducer P1, pressure
Sensor P2, pressure transducer P3, pressure transducer P4, voltage sensor V1, microcontroller.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
It is illustrated in figure 1 the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance, including thermo-electric conversion list
Unit and monitoring unit.
In the present embodiment, secondary fin pipeline employs three, respectively first the 5, second secondary fin of secondary fin pipeline
The 6, the 3rd secondary fin pipeline 7 of pipeline, and the length of the first secondary fin pipeline 5 is less than the length of the second secondary fin pipeline 6,
Length of the length of the second secondary fin pipeline 6 less than the 3rd secondary fin pipeline 7, every width fin pipeline surrounding install patch
It is placed with the metal fin of high efficient heat dissipation performance.
Thermoelectric converting unit includes electromotor 1, cooling system 2, pressure regulator valve 3, the 4, first secondary fin of main fin pipeline
Pipeline 5, second the 9, second secondary fin pipeline 6 of water valve, the 10, the 3rd secondary fin pipeline 7 of the 3rd water valve, the 4th water valve 11, guarantor
Warm pipeline 8, the first water valve 12, the first multiple row cooling water tank group 13, the second multiple row cooling water tank group 14, the first low temperature thermoelectric unit part
The 15, second low temperature thermoelectric unit part group 16, heat exchanger 17 of group, ternary catalyzing unit 22, acoustic filter 23, the first stop valve 18, filtration
Device 19, self-operated type upstream-pressure controller 20, the second stop valve 21, bypass valve 27, temperature sensor T1, temperature sensor T2,
Temperature sensor T3, temperature sensor T4, pressure transducer P1, pressure transducer P2, pressure transducer P3, pressure transducer P4
And voltage sensor V1.
The coolant outlet of cooling system 2 is connected with the input of pressure regulator valve 3 after temperature sensor T1, pressure regulator valve 3
Outfan be connected with the entrance of main fin pipeline 4 after pressure transducer P1, the outlet of main fin pipeline 4 is through temperature
It is divided into two-way after degree sensor T2, is connected with the common inlet of the first multiple row cooling water tank group 13 all the way, another road and more than second
The common inlet of row cooling water tank group 14 is connected, and the common inlet of the first multiple row cooling water tank group 13 is respectively through single-row cooling water
The public outlet of the first multiple row cooling water tank group 13, the common inlet of the second multiple row cooling water tank group 14 are constituted after case 1_1～1_n
Respectively through the public outlet that the second multiple row cooling water tank group 14 is constituted after single-row cooling water tank 2_1～2_n, the cooling of the first multiple row
The public outlet of water tank group 13 and the public outlet of the second multiple row cooling water tank group 14 are divided into four after being connected with temperature sensor T3
Road, the first via are connected with the entrance of the second water valve 9, and the second tunnel is connected with the entrance of the 3rd water valve 10, the 3rd tunnel and the 4th water valve
11 entrance is connected, and the 4th tunnel is connected with the entrance of the first water valve 12, the first water valve 12, the second water valve 9, the 3rd water valve 10 and the
The outlet of four water valves 11 corresponds to secondary with utilidor the 5, second secondary fin pipeline 6 and the 3rd of the 8, first secondary fin pipeline respectively
The entrance of fin pipeline 7 is connected, and utilidor the 8, first secondary fin pipeline the 5, second secondary fin pipeline 6 and the 3rd is secondary scattered
The outlet of backing pipeline 7 is connected and is connected with the entrance of cooling system 2 after temperature sensor T4；The exhaust manifold of electromotor 1
Outlet is connected with the entrance of the first stop valve 18 after pressure transducer P2, outlet and the filter 19 of the first stop valve 18
Entrance is connected, and the outlet of filter 19 is connected with the entrance of self-operated type upstream-pressure controller 20 after pressure transducer P3,
The outlet of self-operated type upstream-pressure controller 20 is connected with the entrance of the second stop valve 21, and the outlet of the second stop valve 21 is through pressure
It is divided into two-way after force transducer P4, is connected with the entrance of heat exchanger 17 all the way, another road is connected with the entrance of bypass valve 27, it is other
The outlet of port valve 27 is connected with 1 exhaust manifold outlet of electromotor, the outlet of heat exchanger 17 successively with ternary catalyzing unit 22 and disappear
Sound device 23 leads to air after being connected；Single-row cooling water tank 1_1～1_n in first multiple row cooling water tank group 13 is low with first respectively
In warm electrical part group 15, the public cold end of the 1st～the n-th row thermo-electric device is connected, single-row in the second multiple row cooling water tank group 14
Cooling water tank 2_1～2_n is connected with the public cold end of the 1st～the n-th row thermo-electric device in the second low temperature thermoelectric unit part group 16 respectively,
In first low temperature thermoelectric unit part group 15, the hot junction of all thermo-electric devices is connected with 17 upper surface of heat exchanger, the second low temperature thermoelectric unit
In part group 16, the hot junction of all thermo-electric devices is connected with 17 lower surface of heat exchanger, and the first low temperature thermoelectric unit part group 15 and second is low
Voltage sensor V1 is connected between warm electrical part group 16.
Monitoring unit is included by microcontroller, D/A output modules 24, A/D modular converters 25, LCD module 28, I/O moulds
Block 26, clock module, Zigbee module 29, GPRS module 30, USB module 31, sound and light alarm 32, host computer 33 and with clock mould
Block 34.
Microcontroller has been internally integrated USB module 31 and clock module 34, by D/A output modules 24 and pressure regulator valve 3
Signal control end be connected control pressure regulator valve 3 aperture；The input of A/D modular converters 25 and pressure transducer P1～P4 and
The signal output part of voltage sensor V1 is connected and gathers their information, and by clock module 34, the output of A/D modular converters 25
End is connected with microcontroller；Microcontroller is by I/O modules 26 and digital temperature sensor T1～T4, the first water valve
12nd, the second water valve 9, the 3rd water valve 10, the signal end of the 4th water valve 11 are connected, and are also connected with sound and light alarm 32；Clock module 34
Record pressure transducer P1～P4, voltage sensor V1, the collection value corresponding time of digital temperature sensor T1～T4 and
Date, microcontroller are connected with host computer 33 by USB module 31 and are communicated, real by host computer 33 and LCD module 28
When show the various information and its corresponding time and date of A/D modular converters and the collection of I/O modules, and show each valve
On off state and its corresponding time and date, also by Zigbee module 29 and GPRS module 30 by above-mentioned various information and respectively
The on off state of individual valve is sent to remote monitoring center.
The present invention keeps the principle of the tail gas thermoelectric conversion system of heat of engine and back-pressure balance as follows：
Thermoelectric converting unit is cold to electromotor by the sufficiently long main fin channels 4 that surrounding is provided with high efficiency and heat radiation piece
But the cooling water of system extraction branch road is passed through the first multiple row cooling water tank group 13 and the second multiple row cooling water tank after being precooled
Group 14, the cooling water in the first multiple row cooling water tank group 13 and the second multiple row cooling water tank group 14 is respectively with heat exchanger about 17
The cold end of the first thermo-electric device group 15 and the second thermo-electric device group 16 on surface is collected after carrying out heat exchange, by the first multiple row
Cooling water tank group 13 and the outlet junction cooling water temperature of the second multiple row cooling water tank group 14 are exported with 1 cooling system 2 of electromotor
The temperature of place's cooling water is compared, and is selected to switch (the such as first secondary radiating of secondary fin pipeline according to different fiducial values
The unlatching 7) with utilidor 8 of the 6, the 3rd secondary fin pipeline of the 5, second secondary fin pipeline of piece pipeline, realizes that the first multiple row is cold
But cooling twice 1 cooling system of access to engine again of water tank group 13 and the outlet junction cooling water of the second multiple row cooling water tank group 14
System；By adding self-operated type upstream pressure pressure regulator valve 20 and its corresponding between electromotor 1 and the connection exhaust manifold of heat exchanger 17
Supporting stop valve, filter 19 and bypass valve 27 carry out the regulation of 1 tail gas back pressure of electromotor, realize that electromotor is not connecing hot friendship
Parallel operation and connect the pressure remained steady of emission after associated components.
It is illustrated in figure 2 the monitoring method flow process of the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance
Figure：Its monitoring method is as follows：
Step 1：Tail gas pressure value P of the heat exchanger test engine in rated power is not connect ', using this value as foundation
The setting value of self-operated type upstream-pressure controller is set；
Step 2：The valve after the exhaust pipe of engine and heat exchanger are connected, after engine start, while control first ends
Valve, the second stop valve, the aperture of bypass valve, make the error between the value and P ' of pressure transducer P2 be less than 5%；
Step 3：After engine start, control pressure regulator valve is opened, if T3≤T1, the first water valve of control is opened, while control
Second water valve, the 3rd water valve and the 4th water valve are closed；If 3 DEG C of 0 ＜ (T3-T1) ＜, the second water valve of control opens simultaneously control the
Three water valves, the 4th water valve and the first water valve are closed；If 3≤(T3-T1)≤5 DEG C, the 3rd water valve of control opens control first simultaneously
Water valve, the second water valve and the 4th water valve are closed；If (T3-T1) 5 DEG C of ＞, the 4th water valve of control open simultaneously control the first water valve,
Second water valve and the 3rd water valve are closed.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, therefore can not be considered to this
The restriction of invention patent protection scope, one of ordinary skill in the art are being weighed without departing from the present invention under the enlightenment of the present invention
Under the protected ambit of profit requirement, replacement can also be made or deformed, be each fallen within protection scope of the present invention, this
It is bright scope is claimed to be defined by claims.
Claims (9)
1. a kind of tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance, including thermoelectric converting unit and with it is described
Thermoelectric converting unit be connected monitoring unit, the thermoelectric converting unit include electromotor (1) and by exhaust manifold with it is described
The heat exchanger (17) that electromotor (1) is connected, it is characterised in that：The cooling system (2) of the electromotor (1) is by pressure regulator valve
(3) it is connected with the entrance of main fin pipeline (4), the outlet of the main fin pipeline (4) is divided into two-way, all the way more than first
The entrance of row cooling water tank group (13) is connected, and another road is connected with the entrance of the second multiple row cooling water tank group (14), and described first
Multiple row cooling water tank group (13) is connected with the cold end of the first low temperature thermoelectric unit part group (15), the second multiple row cooling water tank group
(14) be connected with the cold end of the second low temperature thermoelectric unit part group (16), the hot junction of the first low temperature thermoelectric unit part group (15) with it is described
Heat exchanger (17) upper surface is connected, hot junction and the heat exchanger (17) following table of the second low temperature thermoelectric unit part group (16)
Face is connected, and the outlet of the first multiple row cooling water tank group (13) is connected with the outlet of the second multiple row cooling water tank group (14)
After be divided into two-way, the entrance for leading up to the first water valve (12) with utilidor (8) is connected, and separately leads up to water valve and at least
The entrance of individual secondary fin pipeline is connected, the outlet of the utilidor (8) and the outlet of secondary fin pipeline it is connected after with it is cold
But the entrance of system (2) is connected；
The exhaust manifold of the electromotor (1) is connected with filter (19) through the first stop valve (18), the filter (19)
Outlet be connected with the entrance of self-operated type upstream-pressure controller (20), the outlet of the self-operated type upstream-pressure controller (20)
It is connected with the entrance of the second stop valve (21), the outlet of second stop valve (21) is divided into two-way, all the way with the heat exchange
The entrance of device (17) is connected, and another road is connected with the entrance of bypass valve (27), and the outlet of the bypass valve (27) is started with described
The exhaust manifold outlet of machine (1) is connected.
2. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 1, its feature exist
In：The secondary fin pipeline adopts three, the respectively first secondary fin pipeline (5), the second secondary fin pipeline (6) and the
Three secondary fin pipeline (7), the length of the length of the first secondary fin pipeline (5) less than the second secondary fin pipeline (6), second
Length of the length of secondary fin pipeline (6) less than the 3rd secondary fin pipeline (7)；The first multiple row cooling water tank group (13)
Outlet and the second multiple row cooling water tank group (14) outlet be connected after respectively by the second water valve (9) radiating secondary with first
Piece pipeline (5) connection, the 3rd water valve (10) are connected with the second secondary fin pipeline (6), the 4th water valve (11) is secondary with the 3rd radiates
Piece pipeline (7) is connected.
3. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 1, its feature exist
In：Be provided with the first temperature sensor (T1) between the cooling system (2) and the pressure regulator valve (3), the pressure regulator valve (3) with
It is provided with first pressure sensor (P1) between the main hot channel (4), the outlet of the main hot channel (4) is through second
It is divided into two-way, the outlet of the first multiple row cooling water tank group (13) and the second multiple row cooling water after temperature sensor (T2)
The outlet of case group (14) is divided into two-way, the outlet of the utilidor (8) and institute through three-temperature sensor (T3) after being connected
State secondary fin pipeline outlet be connected after be connected with the entrance of the cooling system (2) through the 4th temperature sensor (T4),
Between the exhaust manifold of the electromotor (1) and the outlet of the entrance and the bypass valve (27) of first stop valve (18)
Second pressure sensor (P2) is provided with, is arranged between the filter (19) and the self-operated type upstream-pressure controller (20)
The outlet for having the 3rd pressure transducer (P3), second stop valve (21) is divided into two after the 4th pressure transducer (P4)
Road, is connected with voltage sensor between the first low temperature thermoelectric unit part group (15) and the second low temperature thermoelectric unit part group (16)
(V1)。
4. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 1 or 2 or 3, its
It is characterised by：The outlet of the heat exchanger (17) is led to big after being connected with ternary catalyzing unit (22) and acoustic filter (23) successively
Gas.
5. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 1 or 2 or 3, its
It is characterised by：The monitoring unit includes microcontroller, D/A output modules (24), A/D modular converters (25) and I/O modules
(26), D/A output modules (24), A/D modular converters (25) and I/O modules (26) are connected with microcontroller；The D/A
Output module (24) is connected with the signal control end of the pressure regulator valve (3)；The input and first of the A/D modular converters (25)
Pressure transducer (P1), second pressure sensor (P2), the 3rd pressure transducer (P3), the 4th pressure transducer (P4) and voltage
The signal output part of sensor V1 is connected, the I/O modules (26) and the first temperature sensor (T1), second temperature sensor
(T2), three-temperature sensor (T3), the 4th temperature sensor (T4), the first water valve (12), the second water valve (9), the 3rd water valve
(10), the signal end of the 4th water valve (11), the first stop valve (18), the second stop valve (21) and bypass valve (27) is connected.
6. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 5, its feature exist
In：The monitoring unit includes the host computer (33) being connected with the microcontroller and LCD module (28), the host computer
And LCD module (28) shows in real time opening for various information that A/D modular converters (25) and I/O modules gather and each valve (33)
Off status.
7. the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 5, its feature exist
In：The monitoring unit includes the Zigbee module (29) being connected with the microcontroller and GPRS module (30), described
Various information and the switch of each valve that A/D modular converters (25) are gathered by Zigbee module (29) and the GPRS module (30)
State is sent to remote monitoring center.
8. a kind of controlling party of the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance as claimed in claim 1
Method, it is characterised in that：The control method comprises the steps：
Step 1：Tail gas pressure value P of heat exchanger (17) test engine in rated power is not connect ', using this value as foundation
The setting value of self-operated type upstream-pressure controller (20) is set；
Step 2：The valve after enmgine exhaust and heat exchanger are connected, the first stop valve after engine start, is controlled simultaneously
(18), the second stop valve (21), the aperture of bypass valve (27), make the error between the value and P ' of second pressure sensor (P2) little
In 5%；
Step 3：After engine start, control pressure regulator valve (3) is opened, if T3≤T1, the first water valve of control (12) is opened, same to time control
The water valve that system is connected with secondary fin pipeline cuts out；If T1 is ＜ T3, the water valve for controlling to be connected with secondary fin pipeline is opened, while
Control the closing of the first water valve.
9. the controlling party of the tail gas thermoelectric conversion system for keeping heat of engine and back-pressure balance according to claim 1
Method, it is characterised in that：The secondary fin pipeline adopts three, the respectively first secondary fin pipeline (5), the second secondary fin
Pipeline (6) and the 3rd secondary fin pipeline (7), the length of the first secondary fin pipeline (5) is less than the second secondary fin pipeline (6)
Length, the length of the length of the second secondary fin pipeline (6) less than the 3rd secondary fin pipeline (7)；First multiple row is cold
But pass through the second water valve (9) after the outlet of water tank group (13) is connected with the outlet of the second multiple row cooling water tank group (14) respectively
Connect with the first secondary fin pipeline (5), the 3rd water valve (10) is connected with the second secondary fin pipeline (6), the 4th water valve (11)
Connect with the 3rd secondary fin pipeline (7)；
The control method comprises the steps：
Step 1：Tail gas pressure value P of heat exchanger (17) test engine in rated power is not connect ', using this value as foundation
The setting value of self-operated type upstream-pressure controller (20) is set；
Step 2：The valve after enmgine exhaust and heat exchanger are connected, the first stop valve after engine start, is controlled simultaneously
(18), the second stop valve (21), the aperture of bypass valve (27), make the error between the value and P ' of second pressure sensor (P2) little
In 5%；
Step 3：After engine start, control pressure regulator valve (3) is opened, if T3≤T1, the first water valve of control (12) is opened, same to time control
Make the second water valve (9), the 3rd water valve (10) and the 4th water valve (11) to close；If 3 DEG C of 0 ＜ (T3-T1) ＜, the second water valve is controlled
(9) open and control the closing of the 3rd water valve (10), the 4th water valve (11) and the first water valve (12) simultaneously；If 3≤(T3-T1)≤5 DEG C,
Control the 3rd water valve (10) to open while controlling the closing of the first water valve (12), the second water valve (9) and the 4th water valve (11)；If (T3-
T1) 5 DEG C of ＞, the 4th water valve (11) of control are opened
Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938566.3A CN105587426B (en) | 2015-12-15 | 2015-12-15 | Thermoelectric conversion system capable of keeping engine heat and backpressure balanced and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938566.3A CN105587426B (en) | 2015-12-15 | 2015-12-15 | Thermoelectric conversion system capable of keeping engine heat and backpressure balanced and monitoring method |
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| Publication Number | Publication Date |
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| CN105587426A CN105587426A (en) | 2016-05-18 |
| CN105587426B true CN105587426B (en) | 2017-04-12 |
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| CN201510938566.3A Expired - Fee Related CN105587426B (en) | 2015-12-15 | 2015-12-15 | Thermoelectric conversion system capable of keeping engine heat and backpressure balanced and monitoring method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10914228B2 (en) | 2016-11-15 | 2021-02-09 | Cummins Inc. | Waste heat recovery with active coolant pressure control system |
| CN112228195A (en) * | 2020-09-21 | 2021-01-15 | 江苏大学 | Variable combination control system of engine exhaust aftertreatment and tail gas collection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201653569U (en) * | 2009-11-09 | 2010-11-24 | 武汉理工大学 | Thermoelectric conversion stand tester for tail gas exhaust heat of automobile engine |
| CN101701873B (en) * | 2009-11-13 | 2012-04-04 | 武汉理工大学 | Automobile engine tail gas waste-heat and electricity converting stand test device and method for controlling same |
| US9080506B2 (en) * | 2013-08-13 | 2015-07-14 | Ford Global Technologies, Llc | Methods and systems for boost control |
| CN203940059U (en) * | 2014-05-29 | 2014-11-12 | 杭州良工阀门有限公司 | A kind of nuclear power self-powering type back pressure valve |
| CN104393791A (en) * | 2014-12-17 | 2015-03-04 | 湖北工业大学 | Automobile exhaust-gas temperature difference power-generation device using both medium-temperature and low-temperature thermoelectric devices |
| CN204271729U (en) * | 2014-12-31 | 2015-04-15 | 湖北工业大学 | A kind of tandem vehicle exhaust temperature difference electricity generation device of secondary conversion |
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