CN100470905C - Fuel feeding method for liquid fuel cell - Google Patents

Fuel feeding method for liquid fuel cell Download PDF

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Publication number
CN100470905C
CN100470905C CNB2006100751684A CN200610075168A CN100470905C CN 100470905 C CN100470905 C CN 100470905C CN B2006100751684 A CNB2006100751684 A CN B2006100751684A CN 200610075168 A CN200610075168 A CN 200610075168A CN 100470905 C CN100470905 C CN 100470905C
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load
fuel
liquid fuel
value
critical
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CN101064370A (en
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沈坤昇
邓丰毅
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ANTIG TECHNOLOGY Inc
Antig Technology Co Ltd
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ANTIG TECHNOLOGY Inc
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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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Abstract

The invention relates to a kind of fuel supplying method which is used in liquid fuel battery. Firstly building the first curve equation and the second curve equation according to different electric load value and corresponding critical consistence value, critical power value, thereinto the first curve equation is used to calculate the critical consistence value of fuel on condition that the load possesses known electric load value, and the second curve equation is used to calculate the critical power value of load on condition that the load possesses known electric load value. When the consistence of the fuel changes, testing the electric load value and power value wasted by load, using the first curve equation and the second curve equation to calculate the critical consistence value and the critical power value of the load. Judging whether the power value wasted by load is not bigger than the critical power value calculated, if it is, new fuel is supplied to the liquid fuel battery.

Description

The fuel feeding method that is used for liquid fuel battery
Technical field
The present invention relates to a kind of fuel feeding method, the method for the particularly a kind of liquid fuel that can supply with stable and debita spissitudo for a long time to the liquid fuel battery device.
Background technology
Fuel cell is a kind of chemical energy that will be stored in fuel and the oxidant is converted into electric energy by electrode reaction a Blast Furnace Top Gas Recovery Turbine Unit (TRT).The kind of fuel cell is quite a lot of, and the mode of classification also each is different, if distinguished, five kinds of electrolytical fuel cells of difference such as alkaline fuel cell, phosphoric acid fuel cell, Proton Exchange Membrane Fuel Cells, molten carbonate fuel cell, solid-oxide fuel cell are arranged according to the electrolyte property difference.Wherein, Proton Exchange Membrane Fuel Cells comprises so-called direct methanol fuel cell again, is fuel with methyl alcohol directly, and does not need first upgrading to become hydrogen, be to research and develop one of higher technology of energy at present, its application target comprises big power station, electric generators for automobile, portable power etc.
Yet in the prior art, no matter be the fuel gas battery, or liquid fuel battery (as: direct methanol fuel cell), in the commercial process of marching toward, all face a difficult problem, the i.e. stability of fuel cell power output performance.At liquid fuel battery, the factor that influences its electric power output performance is a lot, and wherein one promptly about the concentration of liquid fuel.For the electric power output that makes liquid fuel battery has stability, except allowing liquid fuel can be uniformly distributed in the electrochemical reaction district of liquid fuel battery, the most important be exactly want to supply with have stable and debita spissitudo liquid fuel to liquid fuel battery, just can reach the stable purpose of electric power output.
Yet with prior art, in the operation of liquid fuel battery, owing to can't accurately grasp when to add new liquid fuel and suitable addition, the concentration of liquid fuel can depart from along with the time outside the optimum range that set originally gradually after the supply and make, thereby causing liquid fuel battery overall electric power output performance all can not reach perfect condition at last, this defective is that existing liquid fuel battery one of can't smooth commercial reason always.
Summary of the invention
Main purpose of the present invention provides a kind of fuel feeding method, can supply with a kind of liquid fuel with stable and debita spissitudo of liquid fuel battery for a long time.
For reaching above-mentioned purpose of the present invention, the invention provides a kind of fuel feeding method that is used for liquid fuel battery, comprise the following steps: that A. offers liquid fuel battery with the fuel of concentration known, and make this liquid fuel battery generation electrochemical reaction and produce electric power, wherein this fuel is mixed by the high concentration liquid fuel and the aqueous solution, and this high concentration liquid fuel and this aqueous solution have one first content and one second content respectively in this fuel; B. a load (Load) and this liquid fuel battery are electrically connected, and change the electrical property load value of this load; C. for this load, measure and write down the concentration value of this fuel and the performance number that this load consumed at that time respectively with different electrical property load values; D. in this step C carries out, for this load with different electrical property load values, select a critical concentration value and a critical power value respectively, wherein this critical power value is when the concentration of this fuel reaches this critical concentration value, the performance number that this load consumed; E is according to the every different electrical property load values of this load and pairing critical concentration value, critical power value, set up the first curvilinear equation formula and the second curvilinear equation formula, wherein this first curvilinear equation formula is to have under the condition of known electrical load value in this load, be used for calculating the critical concentration value of this fuel, and this second curvilinear equation formula is to have under the condition of known electrical load value in this load, is used for calculating the critical power value of this load; When the concentration of this fuel of F changes, measure the electrical property load value of this load this moment and the performance number that this load consumed, and this first curvilinear equation formula and this second curvilinear equation formula of utilizing this step e to set up, can calculate the critical concentration value of this fuel and the critical power value of this load; G judges whether the performance number that measured this load consumed in this step F is not more than this critical power value that is calculated in this step F, if then supply with this new fuel to this liquid fuel battery.
Wherein, this step G further comprises the following step: measure the remaining volume of this fuel this moment, and, calculate another first content of this fuel middle and high concentration liquid fuel this moment and another second content of this aqueous solution according to the critical concentration value of this fuel of this step F; Calculate first magnitude of recruitment and second magnitude of recruitment, wherein this first magnitude of recruitment equals this first content and this another first content difference between the two, and this second magnitude of recruitment equals this second content and this another second content difference between the two; This new aqueous solution that supply has this new high concentration liquid fuel of this first magnitude of recruitment and has this second magnitude of recruitment is to this liquid fuel battery.
Beneficial effect of the present invention is, logical this second curvilinear equation formula, when load has known electrical load value, can calculate the critical power value of load by this second curvilinear equation formula of setting up by concrete experimental data, thereby can be in the operation of liquid fuel battery, precisely grasp the lower limit of the suitable power output of liquid fuel battery, accurately grasp the interpolation opportunity of new liquid fuel.In addition, this first curvilinear equation formula of setting up by concrete experimental data, then can accurately grasp the high concentration liquid fuel and supply with the actual consumption amount of high concentration liquid fuel in the groove and the actual consumption amount of the aqueous solution in the aqueous solution supply groove, and then add the high concentration liquid fuel and the aqueous solution of realistic consumption.Thereby the feasible concentration that mixes liquid fuel is at last both stablized and is maintained all the time within the optimum range that set originally.
Description of drawings
Figure 1A is used for the flow chart of the fuel feeding method of liquid fuel battery for the present invention.
Figure 1B is the detail flowchart of step 112 among Figure 1A.
Fig. 2 builds the calcspar of the fuel feed system of the liquid fuel battery of putting for cooperating the inventive method.
The experimental data database that Fig. 3 is set up for step 102 among execution Figure 1A and step 104 back.
The first curvilinear equation formula of Fig. 4 A for being set up according to every different electrical property load values among Fig. 3 and pairing critical concentration value.
The second curvilinear equation formula of Fig. 4 B for being set up according to every different electrical property load values among Fig. 3 and pairing critical power value.
The primary clustering symbol description is as follows:
10 fuel feeding methods
100,102,104,106,108,110,112 steps
1120,1122,1124 steps
20 fuel feed systems
200 liquid fuel batteries
202 loads
204 control units
206 fuel feeding channels
2060 liquid level sensors
2062 concentration sensors
208,209 pumpings
210 high concentration liquid fuels are supplied with groove
212 aqueous solution are supplied with groove
Embodiment
Figure 1A is used for the flow chart of the fuel feeding method of liquid fuel battery for the present invention.Fig. 2 builds the calcspar of the fuel feed system 20 of the liquid fuel battery of putting for cooperating the inventive method.Fuel feeding method 10 of the present invention is to be used for supplying with the required liquid fuel of liquid fuel battery 200.Wherein, be applicable to that liquid fuel battery 200 of the present invention can be direct methanol fuel cell, and the fluid fuel in direct methanol fuel cell promptly uses this type of liquid fuel of methanol aqueous solution.Fuel feeding method 10 of the present invention comprises that step 100 to step 112, is respectively described below.
Step 100 is that the fuel of concentration known (as: methanol aqueous solution) is offered liquid fuel battery 200, and make liquid fuel battery 200 that electrochemical reactions take place and produce electric power, wherein the fuel storage of this concentration known is supplied with groove 206 in liquid fuel, and it is that the two mixes by the aqueous solution in high concentration liquid fuel (as: pure methyl alcohol) in the high concentration liquid fuel supply groove 210 and the aqueous solution supply groove 212.In addition, this high concentration liquid fuel and this aqueous solution have first content and second content respectively in the fuel of this concentration known, and this first content can be measured liquid fuels by liquid level sensor 2060 and supply with in the grooves 206 at that time fuel quantity, multiply by this concentration known again and calculate, this second content then can obtain by calculating fuel quantity and this first content difference between the two that liquid fuel supplies with in the groove 206 at that time.
Step 102 provides load 202 and electrically connects with liquid fuel battery 200, and comes the electrical property load value (as: magnitude of voltage or current density value) of varying duty 202 by the control unit 204 of second figure.
Step 104 is for the load 202 with different electrical property load values, measure and write down the concentration value of fuel in the groove 206 of liquid fuel supply at that time and the performance number that load 202 is consumed respectively, wherein the measurement operation of fuel concentration value is to be carried out by concentration sensor 2062, and the measurement operation of load 202 performance numbers is to be carried out by control unit 204, and those every different electrical property load values and measured concentration value, performance numbers at last, will be sent to control unit 204 and store, set up various required experimental data databases then.Shown with reference to figure 3, the original concentration that Fig. 3 is methanol aqueous solution in fuel feeding channel 206 is 10 (vol%), and provide between 16.33 (mA/cm2) and 81.63 (mA/cm2) five kinds of different load current density values to continue to carry out for liquid fuel cell 200 1～2 hour, and at the operating temperature experimental data database that control unit 204 is set up under conditions such as 25～40 ℃.
Step 106 is in step 104 is carried out, and for the load 202 with different electrical property load values, selects a critical concentration value and a critical power value respectively.Wherein, this critical power value is when the concentration of this fuel reaches this critical concentration value, the performance number that load 202 is consumed.At this, be the example explanation equally with Fig. 3, in liquid fuel battery 200 actual operation processes, when the lowering of concentration of this fuel reaches this critical concentration value, power in the load 202 can descend suddenly, the performance number that load 202 this moment is consumed promptly is defined as this critical power value, and if the performance number that load 202 is consumed is lower than this critical power value, then represent the power output of liquid fuel battery 200 desirable not to the utmost, also represent the fuel concentration that offers liquid fuel battery 200 also to be lower than standard value (i.e. this critical concentration value), must add this moment new and fuel that concentration is higher is given liquid fuel cell 200, so that the power output of liquid fuel battery 200 recovers normal.With reference to shown in Figure 3,5 stains are represented respectively from the bottom to top when the load current density value is 16.33,32.65,48.98,65.1 and 81.63 (mA/cm2), the place, place of the critical power value that load 202 is consumed is respectively 2.7,2.8,3.0,3.2 and 3.4 (vol%) and measure each stain critical concentration value at that time.The judgement of above-mentioned this critical concentration value and this critical power value and selection operation mainly are to be carried out by control unit 204.
Step 108 is according to the every different electrical property load values of load 202 and pairing critical concentration value, critical power value, to set up the first curvilinear equation formula and the second curvilinear equation formula, wherein this first curvilinear equation formula is to have under the condition of known electrical load value in load 202, be used for calculating the critical concentration value of this fuel, and this second curvilinear equation formula is to have under the condition of known electrical load value in load 202, is used for calculating the critical power value of load 202.With reference to the first curvilinear equation formula shown in the figure 4A, be according to measuring the every different electrical property load values of Fig. 3 and the curvilinear equation formula that pairing every critical concentration value is set up by experiment.With reference to the second curvilinear equation formula shown in the figure 4B, then be according to measuring the every different electrical property load values of the 3rd figure and the curvilinear equation formula that pairing every critical power value is set up by experiment.
Step 110 is when the concentration of this fuel changes, measure the electrical property load value of load 202 this moment and the performance number that load 202 is consumed, and this first curvilinear equation formula Fig. 4 A that utilizes step 108 to set up) and this second curvilinear equation formula (Fig. 4 B), calculate the critical concentration value of this fuel and the critical power value of load 202 by control unit 204.
Step 112 is these critical power values that whether are not more than in the step 110 to be calculated by the performance number that measured this load consumed in control unit 204 determining steps 110, if, then supply with new fuel to liquid fuel battery 200, and should supply with operation shown in Figure 1B.
Shown in Figure 1B, at first step 1120 is measured the remaining volume of this fuel this moment, and according to the critical concentration value of this fuel of step 110, calculate another first content of the high concentration liquid fuel in this fuel this moment and another second content of this aqueous solution, embodiment is to measure liquid fuel by liquid level sensor 2060 to supply with remaining fuel quantity in the groove 206, multiply by this critical concentration value again and calculate another first content of this fuel middle and high concentration liquid fuel at this moment, then liquid fuel is supplied with fuel quantity remaining in the groove 206 and deducted this another first content, just obtain another second content of the aqueous solution in this fuel this moment.Step 1122 is for calculating first magnitude of recruitment and second magnitude of recruitment, wherein this first magnitude of recruitment equals this first content and this another the first content difference between the two in the step 100, this second magnitude of recruitment equals this second content and this another the second content difference between the two in the step 100, can learn that so the high concentration liquid fuel supplies with the actual consumption amount of the high concentration liquid fuel in the groove 210 and the actual consumption amount that the aqueous solution is supplied with the aqueous solution in the groove 212.At last, step 1124 is supplied with this new aqueous solution have this new high concentration liquid fuel of this first magnitude of recruitment and to have this second magnitude of recruitment to this liquid fuel battery 200.
Among the present invention, all supply operations are to carry out drive controlling by 204 pairs of pumpings of control unit 208,209, come in good time to supply with groove 210 from the high concentration liquid fuel and draw and get new high concentration liquid fuel or supply with groove 212 from the aqueous solution and draw and get the new aqueous solution to fuel feeding channel 206, the liquid fuel after will mixing again is supplied in the liquid fuel battery 200.
More than be not to be used for limiting the present invention to the elaboration of the specific embodiment of the invention; those skilled in the art; without departing from the spirit and scope of the present invention; can make various changes and retouching to it, and these are changed and retouching all should belong to the described protection range of claim of the present invention.

Claims (7)

1, a kind of fuel feeding method that is used for liquid fuel battery is characterized in that, this method comprises the following steps:
A. the fuel with concentration known offers liquid fuel battery, and make this liquid fuel battery generation electrochemical reaction and produce electric power, wherein this fuel is mixed by the high concentration liquid fuel and the aqueous solution, and this high concentration liquid fuel and this aqueous solution have one first content and one second content respectively in this fuel;
B. a load and this liquid fuel battery are electrically connected, and change the electrical property load value of this load;
C. for this load, measure and write down the concentration value of this fuel and the performance number that this load consumed at that time respectively with different electrical property load values;
D. in this step C carries out, for this load with different electrical property load values, select a critical concentration value and a critical power value respectively, wherein this critical power value is when the concentration of this fuel reaches this critical concentration value, the performance number that this load consumed;
E. according to the every different electrical property load values of this load and pairing critical concentration value, critical power value, set up the first curvilinear equation formula and the second curvilinear equation formula, wherein this first curvilinear equation formula is to have under the condition of known electrical load value in this load, be used for calculating the critical concentration value of this fuel, and this second curvilinear equation formula is to have under the condition of known electrical load value in this load, is used for calculating the critical power value of this load;
F. when the concentration of this fuel changes, measure the electrical property load value of this load this moment and the performance number that this load consumed, and this first curvilinear equation formula and this second curvilinear equation formula of utilizing this step e to set up, can calculate the critical concentration value of this fuel and the critical power value of this load;
G. judge whether the performance number that measured this load consumed in this step F is not more than this critical power value that is calculated in this step F, if then supply with this new fuel to this liquid fuel battery.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 2, this step G further comprises the following step:
Measure the remaining volume of this fuel this moment, and, calculate another first content of this fuel middle and high concentration liquid fuel this moment and another second content of this aqueous solution according to the critical concentration value of this fuel in this step F;
Calculate first magnitude of recruitment and second magnitude of recruitment, wherein this first magnitude of recruitment equals this first content and this another first content difference between the two, and this second magnitude of recruitment equals this second content and this another second content difference between the two;
This new aqueous solution that supply has this new high concentration liquid fuel of this first magnitude of recruitment and has this second magnitude of recruitment is to this liquid fuel battery.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 3, the electrical property load value of this load is a magnitude of voltage.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 4, the electrical property load value of this load is a current density value.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 5, this fuel is methanol aqueous solution.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 6, this high concentration liquid fuel is pure methyl alcohol.
According to the described fuel feeding method that is used for liquid fuel battery of claim 1, it is characterized in that 7, this liquid fuel battery is a direct methanol fuel cell.
CNB2006100751684A 2006-04-29 2006-04-29 Fuel feeding method for liquid fuel cell Expired - Fee Related CN100470905C (en)

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Application Number Priority Date Filing Date Title
CNB2006100751684A CN100470905C (en) 2006-04-29 2006-04-29 Fuel feeding method for liquid fuel cell

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Application Number Priority Date Filing Date Title
CNB2006100751684A CN100470905C (en) 2006-04-29 2006-04-29 Fuel feeding method for liquid fuel cell

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CN101064370A CN101064370A (en) 2007-10-31
CN100470905C true CN100470905C (en) 2009-03-18

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