CN209637915U - For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine - Google Patents
For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine Download PDFInfo
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- CN209637915U CN209637915U CN201920145722.4U CN201920145722U CN209637915U CN 209637915 U CN209637915 U CN 209637915U CN 201920145722 U CN201920145722 U CN 201920145722U CN 209637915 U CN209637915 U CN 209637915U
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- cooler bin
- temperature
- incubator
- fuel tank
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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 be in solid bio-fuel feedway under a kind of normal temperature and pressure for internal combustion engine, final vacuum section exhaust pipe in whirlpool is connected to heat exchange box, fuel tank is provided in heat exchange box, it is provided with fuel adding mouth and the first pressure limiting valve above fuel tank, one layer of filter layer is set in the middle part of fuel tank；The liquid outlet of fuel tank is connected to cooler bin；Floating ball lever meter is provided in cooler bin, the bottom of cooler bin is fixed with the 4th temperature sensor；The first fuel pump is also placed in cooler bin, the first fuel pump, to fuel tank, passes through the second piping connection to incubator by the first piping connection；The second pressure limiting valve, second pressure sensor and third pressure sensor are fixed on incubator；Second pressure sensor and third pressure sensor are respectively placed in incubator upper and lower ends.The utility model realizes the liquefaction supply of the higher fuel of fusing point, moreover it is possible to accurately control the temperature for the fuel oil being injected in cylinder, and be able to achieve the online sustainable supply of fuel.
Description
Technical field
The utility model belongs to field of internal combustion engine, and in particular to is in solid life under a kind of normal temperature and pressure for internal combustion engine
Object fuel supply system.
Background technique
With getting worse for energy problem and problem of environmental pollution, the formulation of engine exhaust regulation is also increasingly tighter
Lattice, in order to realize the high-efficiency cleaning burning of internal combustion engine, lot of domestic and foreign scholar constantly studies and improves the burning side of internal combustion engine
Rolf professor D.Reitz of formula, Wisconsin university, the U.S. passes through Comprehensive Comparison homogeneity compression-ignition (HCCI), Premixed combustion
(PCCI) etc. after new combustions mode, a kind of combustion system that combustion process is controlled by control fuel activity is proposed, and
It is named as RCCI (reactivity controlled compression ignition) combustion mode.By a large amount of
Studies have shown that RCCI combustion mode can be realized simultaneously NOXWith the minimum discharge of soot, and the thermal efficiency can be improved, compares
The combustion modes such as HCCI and PCCI, RCCI combustion mode can carry out under broader engine operating condition, and can be easier
Combustion process is controlled, is a kind of efficient, the clean new combustion mode of great potential.
Although RCCI combustion mode is a kind of very with the new combustion mode of development prospect, with the depth of research
Entering, scholars have found that RCCI combustion mode still has some problems, when RCCI combustion mode under Smaller load when compared with running,
The problem of superelevation discharge of UHC and CO, is difficult to solve, when RCCI combustion mode is run under higher load, NOXWith soot
Discharge exceeded, while in-cylinder pressure rate of rise is excessively high, and combustion process becomes difficult to control.In order to widen the operating condition of RCCI,
Scholars have a significant impact to the burning and discharge of RCCI mode by the physicochemical property for largely studying discovery fuel, however very
Influence of the physicochemical property of multi fuel for combustion process is not yet fully apparent from, therefore there is still a need for further researchs.Scholar
When studying various fuel, since certain fuel are in solid-state or glue at normal temperatures and pressures, cannot be used directly for sending out
It is tested in motivation, this allows for scholar and is difficult to the experimental performance on this fuel RCCI engine, and then causes total
Data are imperfect when knot analysis fuel physicochemical property is to RCCI burning and the affecting laws discharged, to further deeply grinding for RCCI
Studying carefully has certain obstruction, in order to enable these fuel on internal combustion engine using carrying out extensive experimental study, it is necessary to a kind of
For being in the feedway of solid bio-fuel under normal temperature and pressure.
Utility model content
The technical problem to be solved by the utility model is to provide be in solid under a kind of normal temperature and pressure for internal combustion engine
Bio-fuel feedway realizes the liquefaction supply of the higher fuel of fusing point, moreover it is possible to accurately control the fuel oil temperature being injected in cylinder
Degree.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
Be in solid bio-fuel feedway under a kind of normal temperature and pressure for internal combustion engine, including heat exchange box, fuel tank,
Cooler bin and incubator；Final vacuum section exhaust pipe in whirlpool is connected to the heat exchange box, between whirlpool final vacuum section exhaust pipe and heat exchange box
Flow is controlled using high-temperature solenoid valve；It is provided with fuel tank in the heat exchange box, is provided with fuel above the fuel tank and adds
One layer of filter layer is arranged in the middle part of fuel tank, is fixed with first pressure sensor in fuel oil lower box part for geat and the first pressure limiting valve
With the first temperature sensor；
The liquid outlet of the fuel tank is connected to cooler bin, is provided between the liquid outlet and cooler bin of fuel tank
Direct-acting electromagnetic valve and third temperature sensor；Floating ball lever meter is provided in cooler bin, the bottom of the cooler bin is fixed
There is the 4th temperature sensor；
The first fuel pump is also placed in the cooler bin, first fuel pump passes through the first piping connection to fuel oil
Case, by the second piping connection to incubator, first pipeline and the second pipeline intersection are provided with T-type three-way solenoid valve；
The second pressure limiting valve, second pressure sensor and third pressure sensor are fixed on the incubator；Second pressure
Sensor and third pressure sensor are respectively placed in incubator upper and lower ends.
Further, second temperature sensor is further fixed in the fuel oil lower box part.
Further, the bottom of the cooler bin is further fixed on the 5th temperature sensor and the 6th temperature sensor.
Further, the first fuel filter is provided on the second pipeline.
Further, insulating layer is provided with outside the incubator.
Further, thermocouple heater and the 7th temperature sensor are additionally provided with inside incubator.
Compared with prior art, the utility model has the beneficial effects that realizing the liquefaction supply of the higher fuel of fusing point, moreover it is possible to
The fuel oil temperature being injected in cylinder is accurately controlled, and is able to achieve the online sustainable supply of fuel.
Detailed description of the invention
Fig. 1 is the utility model for being in solid bio-fuel feedway structural representation under the normal temperature and pressure of internal combustion engine
Figure.
Fig. 2 is heat exchange and the temperature control schematic diagram of utility model device.
In figure: 1- heat exchange box；The first pressure limiting valve of 2-；3- fuel tank；4- filter layer；5- fuel adding mouth；6- cooler bin；7-
First pipeline；8-T type three-way solenoid valve；The second pipeline of 9-；The first fuel filter of 10-；The second pressure limiting valve of 11-；12- heat preservation
Case；The second fuel filter of 13-；14- electromagnetic type fuel flow meter；15- common rail oil pipe；16- fuel injector；The first temperature of 17- passes
Sensor；18- second temperature sensor；19- first pressure sensor；20- high-temperature solenoid valve；The whirlpool 21- final vacuum section exhaust pipe；
22- third temperature sensor；23- direct-acting electromagnetic valve；24- floating ball lever meter；The 4th temperature sensor of 25-；The 5th temperature of 26-
Sensor；The first fuel pump of 27-；The 6th temperature sensor of 28-；29- second pressure sensor；The second fuel pump of 30-；31-
Seven temperature sensors；32- thermocouple heater；33- insulating layer；34- third pressure sensor；35- fuel oil return pipe.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
In utility model device, the gas feed of heat exchange box 1 is connected with whirlpool final vacuum section exhaust pipe 21, and behind whirlpool
It is provided with high-temperature solenoid valve 20 on exhaust section exhaust pipe 21, enters for controlling exhaust gas, the beginning of the air inlet pipe of heat exchange box 1 is direct
It is connected on whirlpool final vacuum section exhaust pipe 21.
Fuel tank 3 is arranged in heat exchange box 1, there are three mouth and first pressure limiting valve 2 on fuel tank 3, wherein refuelling
Be fuel adding mouth 5, gelatinous initial fuel can be added into fuel tank 3 by this mouth；The mouth on 5 side of fuel adding mouth
It is oil return opening, in order to which the fuel oil that cooler bin 6 is not sent in incubator 12 in time is drawn back again in fuel tank 3；3 bottom of fuel tank
The outlet in portion is to flow into the fuel oil of liquid in cooler bin 6.The first pressure limiting valve 2 on fuel tank 3 is fuel oil in order to prevent
Hypertonia in case 3.Be additionally provided with one layer of strainer (filter layer 4) in fuel tank 3, the effect of strainer be by gelatinous fuel and
The fuel of liquid separates, and gelled fuels is waited to start to be heated and can flow to 3 bottom of fuel tank when being molten into liquid through filter screen,
And then enter in cooler bin 6, two temperature sensors (the first temperature sensor 17, second temperature are also provided on fuel tank 3
Sensor 18).The temperature of liquid fuel in the two sensor measurement fuel tanks 3, the high-temperature electromagnetic that cooperation control exhaust gas enters
Valve 20 controls the oil temperature in fuel tank 3 within the scope of a suitable temperature；First pressure sensing is also provided in fuel tank 3
Device 19 is the amount in order to indirectly measure 3 intermediate fuel oil of fuel tank, because of air and fuel oil that first pressure sensor 19 detects
Pressure is different, if the pressure that first pressure sensor 19 detects becomes from liquid in the case where whole device works normally
Gaseous state, and keep a period of time it is constant, this mean that the solid bio-fuel in fuel tank 3 consumption be over, need at this time from
Solid fuel is added into fuel tank 3 in fuel adding mouth 5.
There are a direct-acting electromagnetic valve 23 and third temperature sensor 22 between fuel tank 3 and cooler bin 6, this is in order to thick
The temperature for being flowed into liquid in cooler bin 6 is slightly controlled, when temperature is higher than setting value, direct-acting electromagnetic valve 23 is opened, liquid combustion
Material is with regard to freely being cooled down from being flowed into cooler bin 6 in fuel tank 3, and valve is shut off when temperature is lower than setting value, liquid
Fuel continuation is heated in fuel tank 3, and cooler bin 6 is a square box, is radiated for convenience by cabinet design Cheng Wuding
, it is provided with floating ball lever meter 24 in cooler bin 6, is used to detection of liquid level and changes；There are three temperature sensors in cooler bin 6
(25,26,28).It is for measuring the fuel oil temperature in cooler bin 6, by calculating the mean temperature of three temperature sensors come table
Levy the fuel oil temperature in cooler bin 6, the first fuel pump 27 in cooler bin 6 be in order to fuel oil is pumped into incubator 12 or
It is to draw back fuel oil in fuel tank 3, this path is realized by one T-type three-way solenoid valve 8 of control.
It is provided with the first fuel filter 10 among cooler bin 6 and incubator 12, is used to filter fuel, fuel oil passes through first
Fuel filter 10 enters directly into incubator 12, and insulating layer 33 is provided with outside incubator 12, in order to reduce heat loss,
It is maintained at fuel oil as far as possible within the scope of a stable temperature, there are also the second pressure limiting valves 11 in incubator 12, for limiting
Pressure in incubator 12, prevents hypertonia；Pressure sensor (29,34) is additionally provided in incubator 12 to limit liquid level height
Degree, is additionally provided with the 7th temperature sensor 31 near the second fuel pump 30 to monitor the fuel oil temperature in incubator 12, then match
The thermocouple heater 32 around incubator 12 is closed to control the fuel oil temperature in incubator 12 in a relatively stable range
It is interior, the fuel oil temperature in penetrating cylinder is allowed in this way in a controllable range, the combustion that the second fuel pump 30 will prepare again
Oil is carried out by common rail oil pipe 15 and 16 supply engine of fuel injector using extra fuel oil returns to heat preservation through fuel oil return pipe 35
In case 12, it is all tied with insulation belt on the oil feed line and oil return line gone out from incubator 12, fuel is in pipeline in order to prevent
Dissipated heat further accurately controls the fuel oil temperature sprayed into cylinder.
Further explanation explanation is made to the utility model referring to Fig. 1, it is assumed that fuel used experiment is the tert-butyl alcohol,
Its fusing point is 25.7 DEG C, and boiling point is 82.8 DEG C, and the realization principle of utility model device is illustrated by the tert-butyl alcohol.
Assuming that external environment is that at normal temperatures and pressures, the tert-butyl alcohol is in solid state gelatineous at this time, it is added by fuel adding mouth 5
Enter the tert-butyl alcohol into fuel tank 3, engine should use other fuel first to carry out warming-up, such as diesel oil, open high-temperature solenoid valve 20
It allows a part of exhaust gas to enter in heat exchange box 1 to be heated, then passes through the first temperature sensor 17 (and second temperature sensor
18) temperature of fuel oil in fuel tank 3 is controlled, it is assumed that control temperature is between 45~70 DEG C, during heating, if two temperature sensing
The mean temperature of device is higher than 70 DEG C, then closes high-temperature solenoid valve 20, high-temp waste gas does not enter back into heat exchange box 1, in fuel tank 3
The temperature of fuel oil starts to reduce, when temperature is reduced to 45 DEG C or less, i.e., the mean temperature of two temperature sensors less than 45 DEG C,
High-temperature solenoid valve 20 is reopened, allows exhaust gas heated fuel oil again, becoming liquid after solid tert-butyl alcohol heating just directly can be with
The lower half storey that fuel tank 3 is flowed to through filter layer 4 (strainer), repeating the above process can produce in the lower half storey of fuel tank 3
The liquid tert-butyl alcohol of the temperature between 45~70 DEG C.
The work of cooler bin 6 will be combined with incubator 12, there is second pressure sensor 29 and third pressure in incubator 12
Force snesor 34 before the experiment for carrying out the tert-butyl alcohol, will be added for measuring liquid level by the exhaust gas of other fuel combustions
Heating oil calculates heat-exchange time, when fuel tank 3 has the fuel oil that can be full of cooler bin 6, then opens direct-acting electromagnetic valve 23, makes
Fuel oil is flowed into cooler bin 6, cools down fuel oil, and fuel oil after cooling is then pumped into guarantor by the first fuel pump 27
Incubator 12, repeats the above process, and produces one case fuel in incubator 12 in advance, until the liquid level in incubator 12 reaches
When the position of third pressure sensor 34 (it is assumed that third pressure sensor 34 is located at upper end), just begin to use the tert-butyl alcohol into
Row experiment.In experimentation, the heat transfer process of fuel tank 3 is constantly carried out, and be ensure that and is had temperature in fuel tank 3 at 45~70 DEG C
Between the liquid tert-butyl alcohol, until liquid level be lower than second pressure sensor 29 position when, turn on direct-acting electromagnetic valve at this time
23, it is flowed into fuel oil in cooler bin 6, the liquid level detected in cooler bin 6 by the floating ball lever meter 24 in cooler bin 6 is high
Degree just closes direct-acting electromagnetic valve 23 when floating ball lever meter 24 detects the liquid level highest in cooler bin 6, cooling
Fuel oil temperature in case 6 passes through three temperature sensors (the 4th temperature sensor 25, the 5th temperature sensor 26 and the 6th temperature
The mean temperature of sensor 28 monitors, and temperature begins to reduce after fuel enters in cooler bin 6, waits three temperature sensing
When the mean temperature that device is detected is reduced to 41 DEG C, the first fuel pump 27 is started to work, and T-type three-way solenoid valve 8 is opened to second
6 intermediate fuel oil of cooler bin is pumped into incubator 12, repeats the above process by pipeline 9, and the oil that cooler bin 6 has cooled down is by each
Be pumped into incubator 12, it is subsequent will by heat exchange calculate guarantee with the fuel oil being pumped into the time in incubator 12 be greater than protect
The fuel oil consumed in incubator 12, so that the fuel oil in incubator 12 is continuously increased, the fuel level in incubator 12
When reaching the position of third pressure sensor 34, the first fuel pump 27 fuel feeding, direct-acting electromagnetic valve 23 no longer into incubator 12
Also it no longer opens, the amount of fuel in cooler bin 6 is detected by floating ball lever meter 24 at this time, fuel oil remaining in cooler bin 6 is led to
It crosses the first fuel pump 27 and is all drawn back in fuel tank 3 through the first pipeline 7, make in cooler bin 6 that there is no fuel oils, until incubator 12
In fuel level when being reduced to 29 or less second pressure sensor, repeat above-mentioned steps, make the fuel oil in fuel tank 3
It is flowed into cooler bin 6, is then pumped into incubator 12 again.
After fuel enters in incubator 12, as previously mentioned, passing through second pressure sensor 29 and third pressure sensing
Device 34 measures liquid level, and by the 7th temperature sensor 31 come monitoring temperature, the 7th temperature sensor 31 and thermocouple add
Hot 32 cooperating of device come guarantee the fuel oil temperature in incubator 12 within the scope of 40 ± 1 DEG C, fuel oil from cooler bin 6 enter
After into incubator 12, although incubator 12 has insulating layer 33, also inevitably there is thermal loss, therefore temperature also can
It reduces, when the fuel oil temperature of the 7th temperature sensor 31 measurement is reduced to 39 DEG C or less, the heat that is arranged in around incubator 12
Galvanic couple heater 32 is started to work, and is started to fuel Heating, when the fuel oil temperature of the 7th temperature sensor 31 measurement rises to 41
When, thermocouple heater 32 stops working, and so on, it is ensured that model of the fuel oil temperature at 40 ± 1 DEG C in incubator 12
Within enclosing.
After experiment terminates, direct-acting electromagnetic valve 23 is closed, fuel oil remaining in cooler bin 6 is all passed through into the first combustion
Oil pump 27 is drawn back in fuel tank 3 through the first pipeline 7, and the remaining fuel oil of incubator 12 can not have to extraction, can when next time reuses
It can be used with melting it by thermocouple heater 32 come heated fuel oil and controlling temperature.
In order to guarantee fuel oil sustainable supply, exactly after having produced one case fuel oil in incubator 12, engine is used
When the fuel oil is tested, it is ensured that the fuel oil in incubator 12, which will not be reduced to always, is insufficient to allow use, it is necessary at the same time
The interior liquid fuel amount produced is greater than the amount of fuel being consumed, and heat exchanging is calculated as follows: as shown in Fig. 2, if A represents combustion
Fuel tank 3, B represent cooler bin 6, and C represents incubator 12, if environment temperature is tw, the exhaust gas temperature behind whirlpool is t1, fire in fuel tank A
Oil controlled at t2, the inflow temperature of cooler bin B intermediate fuel oil is t3, the outflow temperature of fuel oil is t4, incubator C intermediate fuel oil
Controlled at t4, make the outflow temperature of cooler bin B intermediate fuel oil is identical as the control temperature of incubator C intermediate fuel oil to can guarantee stream
Entering fuel oil new in incubator C will not make the fuel oil temperature in incubator C have very big fluctuation；The surface area of fuel tank A is S1,
The surface area of cooler bin B is S2, the surface area of incubator C is S3。
Assuming that utility model device works normally, exhaust gas is entered in heat exchange box 1, later, the package of exhausted air quantity abundance
In the outer surface of fuel tank A, the fuel oil in fuel tank A and fuel tank A is seen integrally, exhaust gas just by heated fuel oil case A come
Heated fuel oil calculates the heat that fuel requirement absorbs in heat transfer process:
Q1=cm1·|tw-t2| (1)
Wherein, Q1The fuel heat to be absorbed when being heat exchange, c is fuel used specific heat capacity, m1It is in fuel tank A
Quality of fuel, twIt is the initial temperature of fuel, the initial temperature of fuel is exactly environment temperature, t herein2It is that fuel is to be achieved
Temperature, the i.e. temperature to be controlled in fuel tank A.
The heat exchanging process of fuel tank A and exhaust gas, which is simplified, becomes one-dimensional, ignores the phase transformation generated by fuel meltdown
It influences, diabatic process is reduced to the heat transfer problem in engineering, temperature is transmitted to the outer of fuel tank A by thermal convection by high-temp waste gas
Surface, the outer surface of fuel tank A pass through the inner surface that heat is transmitted to fuel tank A by heat transfer again, and the inner surface of fuel tank A again will
Heat is transmitted to fuel oil, and the heat exchange amount calculation formula of whole process is as follows:
Wherein,It is the heat exchange amount of fuel tank A heat transfer process,It is the area that fuel tank A participates in heat exchange, herein fuel oil
It can only be full of the half of fuel tank, so heat exchange area is the half of fuel tank A area, t1And t2It is exhaust gas temperature and fuel oil respectively
The temperature of fuel oil, k in case A1It is the overall heat-transfer coefficient of this diabatic process, h1It is the surface coefficient of heat transfer of fuel oil in fuel tank A, λa
It is the thermal coefficient of oil tank material, δ1It is the surface thickness of fuel tank A, h2It is the surface heat transfer system of the outer high-temp waste gas of fuel tank A
Number.
After fuel oil enters cooler bin B, surface and extraneous progress heat exchange of the fuel oil by cooler bin B, this biography
Hot mode is simplified as a kind of simple engineering heat transfer, and temperature is transmitted to the surface of cooler bin B by fuel oil, and the surface of cooler bin B will
Temperature is transmitted to atmosphere, completes heat exchange, this heat transfer process is the process of the fuel oil heat release cooling in cooler bin B, intermediate fuel oil
Thermal discharge are as follows:
Q2=cm2·|t4-t3| (3)
Wherein, Q2It is the heat that fuel requirement is released in cooler bin B, c is the specific heat capacity of fuel, m2It is into cooler bin B
In quality of fuel, t3It is into the initial temperature of the fuel in cooler bin B, t4It is that fuel to be reduced in cooler bin B
Temperature, be exactly the temperature t to be controlled in incubator C4。
The heat exchange amount of cooler bin B heat transfer process are as follows:
Wherein,It is the heat exchange amount of the heat exchanging process of cooler bin B, S2' it is the area that cooler bin B participates in heat exchange, t3It is
Enter the fuel oil temperature in cooler bin B, twIt is the temperature of external environment, k2It is the overall heat-transfer coefficient of cooling procedure, h3It is cooling
The surface coefficient of heat transfer of case B fuel, λbIt is the thermal coefficient of cooler bin B material, δ2The thickness of cooler bin B surface, h4It is extraneous
The surface coefficient of heat transfer of air.
Fuel used in calculating process is assumed to the tert-butyl alcohol, the fusing point t of the tert-butyl alcoholrIt is 25.7 DEG C, boiling point tfIt is 82.42
DEG C, specific heat capacity c is 3.04KJ/ (kgk), density 0.775kg/L.Assuming that environment is that fuel oil is added at 25 DEG C of normal temperature and pressure
The initial temperature of the gluey tert-butyl alcohol in case A is substantially also at 25 DEG C or so, by taking the heavy duty diesel engine of a Yuchai as an example, hair
The model engine model of motivation are as follows: YC6L260-50, the engine is when carrying out RCCI experiment, the diesel oil oil consumption range of original machine
Between 2-30kg/h, the range of the whirlpool final vacuum temperature of the engine is 100-400 DEG C.If by the fuel tank of low activity fuel
A is designed to that the volume of 30*30*30cm is the cabinet of 27L, surface area 5400cm2, fuel tank A and cooler bin B are all made of thermally conductive
The higher silico-aluminum of coefficient (87Al-13Si) does material, and the thermal coefficient at 25 DEG C is about 178W/ (m*K), and this two
The thickness of cabinet is 1.5mm.
In conjunction with Fig. 2, exhaust gas temperature t behind the whirlpool of YC6L260-50 engine1=100-400 DEG C, the control of fuel tank A intermediate fuel oil
Temperature t processed2=45-70 DEG C, flow into the fuel oil temperature t of cooler bin B3=45-70 DEG C, flow out the fuel oil temperature t of cooler bin B4=40
± 1 DEG C, the fuel oil in incubator C controls temperature t4=40 ± 1 DEG C, environment temperature tw=25 DEG C.
Assuming that the tert-butyl alcohol is loaded with the top half of fuel tank, volume 13.5L is according to the density of the tert-butyl alcohol
0.775kg/L calculates the quality m of the tert-butyl alcohol in fuel tank A at this time1About 10kg is calculated according to formula (1) by this
When a little fuel are all heated to 45 DEG C or more, the heat of required absorption are as follows:
Q1=3.04KJ/ (kgk) × 10kg × (45-25) k ≈ 608KJ
Because the heat exchange of fuel tank A and exhaust gas is the heat transfer problem in engineering, fuel tank A external surface and exhaust gas are carried out
The heat exchange of forced convertion chooses the overall heat-transfer coefficient k of fuel tank A and exhaust gas heat exchange according to the empirical value of heat transfer coefficient1For
80W/(m2* K), calculate the heat exchange amount of entire heating processIt is as follows:
It needs fuel Heating to t2=45 DEG C or more, exhaust gas temperature t1Range between 100-400 DEG C, therefore, heating
The heat exchange amount of processRange be:
By calculate it can be concluded that, the heat the to be absorbed when tert-butyl alcohol fuel in fuel tank A is heated to 45 DEG C or more
Measure Q1≈ 608KJ, and the heat exchange amount of entire heating process isTherefore can roughly estimate
Calculate the time of heated fuel oilBetween.
Because the size of cooler bin B will be matched with the size of incubator C, incubator C is designed to a 20*20*
The cabinet of 20cm, volume 8L, the fuel oil entered in cooler bin B from fuel tank A about fills the 3/4 of cooler bin C, according to uncle
The density of butanol is 0.775kg/L, calculates the amount of fuel m entered in cooler bin B2About 4.65kg.Cooler bin B participates in heat exchange
Face be bottom surface and three sides, since cooler bin B be no roof construction, thus fuel oil can also directly with the hot friendship of air progress
It changes, cooler bin B is taken to participate in the area S ' of heat exchange in summary23/4 four sides, about 2000cm are added for upper bottom surface2,
Into intermediate temperature of the fuel oil temperature between 45~70 DEG C, because temperature range is smaller, between 45~70 DEG C of cooler bin B
57 DEG C are spent to characterize the fuel oil initial temperature t in cooler bin B4, the reduced temperature t of cooler bin B intermediate fuel oil needs3It is 41 DEG C, according to
Formula (3) calculates the thermal discharge for the process that cools are as follows:
Q2=3.04KJ/ (kgk) × 4.65kg × (57-41) k ≈ 226KJ
Because the heat exchange of cooler bin B and outside air is the heat transfer problem in engineering, cooler bin B external surface and the external world
Air carries out the heat exchange of free convection, overall heat-transfer coefficient k2Opposite k1It is smaller, according to the empirical value of heat transfer coefficient, choose cooling
The overall heat-transfer coefficient k of case B and outside air heat exchange2For 70W/ (m2* K), calculate the heat exchange amount of entire heating processIt is as follows:
By calculate it can be concluded that, the heat Q to be released when the tert-butyl alcohol fuel in cooler bin B is cooled to 41 DEG C2
≈ 226KJ, and the heat exchange amount of entire exothermic process isTherefore it is estimated that the tert-butyl alcohol it is cooling when
Between
The main purpose for carrying out heat exchange calculating is sustainable supply in order to realize fuel, it is assumed that incubator C is a 30*
The cabinet of 30*40cm fills the liquid level of tert-butyl alcohol fuel about at the height of 30cm, therefore third pressure sensor
At the position of the high 30cm of cabinet, the tert-butyl alcohol amount of fuel for filling incubator C is about 21kg for 34 position.According to the diesel oil of original machine
Oil consumption 2-30kg/h calculates the fuel consumption in incubator, is calculated with maximum oil consumption 30kg/h, trunkful oil can at least make
WithLeft and right.Determine that the position of second pressure sensor 29 in incubator C is being protected
At the 1/4 of incubator C intermediate fuel oil liquid level maximum height, in this way when liquid level is reduced to the position of second pressure sensor 29, fuel
21 × 3/4=15.75kg is used, the most short of these fuel is using the timeThis when
Between be far longer thanTherefore in this process, fuel oil has quilt in fuel tank A of sufficient time
It is heated into liquid, when liquid level is reduced to the position of second pressure sensor 29, also surplus 21 × 1/4=5.25kg in incubator C
Fuel oil, cooler bin B can once cool down the fuel oil of 4.65kg, need time about 502s, and 4.65kg combustion is consumed in incubator C
Oil most fast time isIt is entered so the fuel oil of 4.65kg is cooled to from cooler bin B
Total used time in incubator C is less than the most fast elapsed time of 4.65kg fuel oil, and the confession of fuel oil at the same time may be implemented
Consumption can be greater than to amount, that is, ensure that the amount of fuel in incubator C will not be reduced to always insufficient use, may be implemented to fire
The sustainable supply of oil.
Claims (6)
1. being in solid bio-fuel feedway under a kind of normal temperature and pressure for internal combustion engine, which is characterized in that including heat exchange
Case (1), fuel tank (3), cooler bin (6) and incubator (12)；
Whirlpool final vacuum section exhaust pipe (21) is connected to the heat exchange box (1), whirlpool final vacuum section exhaust pipe (21) and heat exchange box (1) it
Between using high-temperature solenoid valve (20) control flow；It is provided with fuel tank (3) in the heat exchange box (1), on the fuel tank (3)
Side is provided with fuel adding mouth (5) and the first pressure limiting valve (2), one layer of filter layer (4) is arranged in the middle part of fuel tank (3), in fuel oil
Case (3) lower part is fixed with first pressure sensor (19) and the first temperature sensor (17)；
The liquid outlet of the fuel tank (3) is connected to cooler bin (6), fuel tank (3) liquid outlet and cooler bin (6) it
Between be provided with direct-acting electromagnetic valve (23) and third temperature sensor (22)；Floating ball lever meter is provided in cooler bin (6)
(24), the bottom of the cooler bin (6) is fixed with the 4th temperature sensor (25)；
It is also placed with the first fuel pump (27) in the cooler bin (6), first fuel pump (27) is connected by the first pipeline (7)
Fuel tank (3) are connected to, are connected to incubator (12) by the second pipeline (9), first pipeline (7) and the second pipeline (9) are handed over
T-type three-way solenoid valve (8) are provided at remittance；
The second pressure limiting valve (11), second pressure sensor (29) and third pressure sensor are fixed on the incubator (12)
(34)；Second pressure sensor (29) and third pressure sensor (34) are respectively placed in incubator (12) upper and lower ends.
2. as described in claim 1 for being in solid bio-fuel feedway, feature under the normal temperature and pressure of internal combustion engine
It is, is further fixed on second temperature sensor (18) in the fuel tank (3) lower part.
3. as described in claim 1 for being in solid bio-fuel feedway, feature under the normal temperature and pressure of internal combustion engine
It is, the bottom of the cooler bin (6) is further fixed on the 5th temperature sensor (26) and the 6th temperature sensor (28).
4. as described in claim 1 for being in solid bio-fuel feedway, feature under the normal temperature and pressure of internal combustion engine
It is, the first fuel filter (10) is provided on the second pipeline (9).
5. as described in claim 1 for being in solid bio-fuel feedway, feature under the normal temperature and pressure of internal combustion engine
It is, is provided with insulating layer (33) outside the incubator (12).
6. as described in claim 1 for being in solid bio-fuel feedway, feature under the normal temperature and pressure of internal combustion engine
It is, is additionally provided with thermocouple heater (32) and the 7th temperature sensor (31) inside incubator (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145722.4U CN209637915U (en) | 2019-01-28 | 2019-01-28 | For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920145722.4U CN209637915U (en) | 2019-01-28 | 2019-01-28 | For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine |
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| Publication Number | Publication Date |
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| CN209637915U true CN209637915U (en) | 2019-11-15 |
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| CN201920145722.4U Withdrawn - After Issue CN209637915U (en) | 2019-01-28 | 2019-01-28 | For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723586A (en) * | 2019-01-28 | 2019-05-07 | 西华大学 | For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine |
-
2019
- 2019-01-28 CN CN201920145722.4U patent/CN209637915U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723586A (en) * | 2019-01-28 | 2019-05-07 | 西华大学 | For being in solid bio-fuel feedway under the normal temperature and pressure of internal combustion engine |
| CN109723586B (en) * | 2019-01-28 | 2023-08-18 | 西华大学 | Solid biofuel supply device for internal combustion engine at normal temperature and normal pressure |
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