KR100867443B1 - Performance test equipment for a multi-ejector used to fuel cell - Google Patents

Abstract

A performance tester of a duplex ejector for a fuel battery is provided to reduce costs when performs a performance test, and to reduce the malfunction generated in the drive of a tester. A performance tester of a duplex ejector for a fuel battery is characterized in that the fluid is supplied by the suction force of an ejector(E1, E2) generated by the progressing of the driving fluid; the supplied fluid performs the fuel function in the fuel cell stack; the remaining fluid is circulated by an ejector; the pipe(P) where the driving fluid is progressed is fractionized to the several sections, and the ejector is installed at the respective fractionized pipe; the piping inhaling the remaining fluid is connected to each ejector.

Description

Performance test equipment for fuel cell double ejector {Performance test equipment for a multi-ejector used to fuel cell}

The present invention relates to an apparatus for evaluating the performance of a double ejector for a fuel cell.

In detail, the present invention implements a configuration that enables the performance evaluation of a plurality of ejectors applied to perform the circulation and recirculation of the fuel cell without applying an actual fuel cell stack, and the configuration thereof. The present invention relates to a device for evaluating the performance of a double ejector for a fuel cell that proposes a configuration for more stable driving, thereby reducing the cost of performing the performance evaluation and eliminating the fear of malfunction caused when the device is driven.

As a power source for generating a driving force using fuel, an internal combustion engine driven by gasoline, diesel, or the like is traditionally applied. Such internal combustion engines are known to inhale, compress, and explode fuel to generate driving power and discharge explosive exhaust gas to the outside.

Since the internal combustion engine has a high pollution due to the exhaust gas, fuel cells are attracting attention as a promising alternative means for improving this. Such fuel cells have reduced pollution compared to internal combustion engines, and their high efficiency has resulted in much research and development as a means to replace existing internal combustion engines.

1 is a schematic diagram showing the configuration of the fuel cell.

Referring to the drawings, the fuel cell is disposed in the chamber 1 with the anode 2 and the cathode 3 at regular intervals, and the electrolyte membrane 4 between the anode 2 and the cathode 3. ) Is formed and configured to supply fuel and air such as hydrogen gas to the anode 2 and the cathode 3 through the chamber 1.

In such a fuel cell, when a fuel, which is hydrogen gas (H), is supplied to the anode 2 side and at the same time air is supplied to the cathode 3 side, an electrochemical oxidation reaction occurs in the anode 2, whereby hydrogen ions and electrons are generated. Ionized and oxidized. The ionized hydrogen ions move toward the cathode 3 through the electrolyte membrane 4, and electrons move through the anode 2.

At this time, the hydrogen ions moved to the cathode 3 electrochemically reacts with oxygen in the air supplied to the cathode 3 to generate reaction heat and water, and at the same time, electrical energy is generated due to the movement of electrons. will be.

In this case, in order to continuously generate electrical energy in the fuel cell, fuel must always be supplied to the fuel electrode 2 side. For this purpose, fuel is supplied to the fuel electrode 2 side, and the supplied fuel supplies the electrical energy. In the generated and discharged line, an ejector for circulating and recirculating fuel is installed.

In particular, the ejector drives only one ejector when the load is low when the fuel is supplied, circulated and recycled, and when the load is high, both ejectors are driven to improve the fuel supply, circulation and recycling efficiency. A double ejector configuration has been proposed for this purpose.

The double ejector for fuel cells is mainly used for supplying, circulating, and recycling a large amount of fuel when implementing a large-capacity fuel cell.

The ejector of the fuel cell must be evaluated for its performance in order to determine the efficiency of the electric energy generated in the fuel cell, and in order to perform the performance evaluation, the fuel cell stack (many of which is manufactured in the same manner as the actual one) Of fuel cells stacked on top of each other), and the ejector performance is evaluated by supplying, circulating, and recirculating fuel in the ejector.

In the conventional ejector evaluator configuration, the same fuel cell stack as the actual one is manufactured at a considerable high cost, thereby exposing a problem that the cost of performing the evaluation is increased.

In addition, since the ejector evaluator has been evaluated on a single ejector until recently, each ejector is individually applied to the evaluator to evaluate performance of each ejector applied to a fuel cell employing a plurality of ejectors. Since the performance evaluation is performed several times, a problem arises that further increases the evaluation cost.

This is a problem caused by the fact that a separate configuration for evaluating the performance of multiple ejectors at the same time cannot be proposed, and an apparatus is urgently needed to complete the performance evaluation of each ejector in a single operation for a system in which multiple ejectors are applied. to be.

The present invention has been invented to solve the above problems and meet the needs.

Accordingly, the present invention is implemented by manufacturing a fuel cell stack in a mock-up that can be manufactured at a low cost to evaluate the ejectors applied to a plurality of fuel cell systems at the same time, reducing the performance evaluation time and at the same time doubles It is an object of the present invention to provide an ejector performance evaluation apparatus that can eliminate the risk of malfunction caused when the ejector is operated and to obtain the performance evaluation results more accurately.

In order to achieve the above object, the present invention has the following configuration.

The present invention allows the suction fluid to be supplied by the suction force of the ejector generated by the progress of the driving fluid so that the supplied suction fluid simulates the fuel function in the fuel cell stack, and the remaining suction fluid after the fuel function is ejected In the ejector performance evaluation device to be circulated by the suction apparatus, the pipe in which the drive fluid is progressed is branched into a plurality of places, the ejector is installed in each branched pipe, the suction that remains after the fuel function is performed on each of these ejectors The pipe for sucking the fluid is connected.

Alternatively, the present invention allows the suction fluid to be supplied by the suction force of the ejector generated by the driving fluid so that the supplied suction fluid simulates the fuel function of the fuel cell, and the remaining suction fluid after the fuel function is simulated. In the ejector performance evaluation device to be circulated by the ejector, the humidifier and pressure forming the same conditions as the fluid characteristics of the actual residual fuel at the point where the suction fluid is sucked in order to simulate the fuel function of the fuel cell A mock-up stack with a dropping device connected to the pipe is installed, and the pipe through which the driving fluid proceeds is branched into a plurality of places, and the ejector is installed in a branched pipe, and each of the ejectors performs a fuel function on the mock-up stack. Piping for sucking the connection may be configured.

At this time, each of the pipes provided with the plurality of ejectors is installed with an evaluation control assembly for measuring and interrupting the conditions of the driving fluid and the suction fluid supplied and circulated through the ejector.

Here, the evaluation control assembly, the pressure installed in a plurality of branched pipes respectively for detecting and converting the pressure of the supply fluid supplied to the ejector, the pressure of the supply fluid passed through the ejector, the pressure of the fuel sucked into the ejector It consists of a transducer.

In particular, the evaluation control assembly is installed in the branched pipe before the drive fluid passes through the ejector, respectively, operation selection to control the progress of the drive fluid so that the drive fluid can pass only through the desired ejector of the plurality of ejectors It is configured to include a valve.

In addition, the evaluation control assembly, the suction fluid is installed in the pipe before the remaining suction fluid is sucked through the ejector, so that the suction fluid can be sucked only to the ejector side is selected and operated by the control of the operation selection valve. It further comprises a suction selection valve for controlling the progress of and at the same time to prevent the back flow of the suction fluid.

The evaluation control assembly may further include a check valve installed in a branched pipe where the driving fluid and the suction fluid pass through the ejector to prevent the driving fluid and the suction fluid from flowing back by outside air.

Preferably, the driving fluid and the suction fluid is applied to hydrogen gas.

As described above, the present invention, by making the fuel cell stack as a mock-up to make a configuration for performing the performance evaluation at a low price it is possible to obtain the effect of reducing the cost when performing the evaluation.

In addition, the present invention can perform the performance evaluation of the double ejector for each ejector at the same time can be performed at the same time to reduce the performance evaluation time, it is configured to solve the problem of malfunction due to the back flow of the supplied fuel It is effective to obtain accurate performance evaluation results.

2 is a piping configuration diagram of an ejector performance evaluation apparatus according to the present invention.

Referring to the drawings, the evaluation apparatus according to the present invention is composed of the ejector (E1, E2), the primary flow portion 10, the secondary flow portion 20, the mock-up stack 30, the tertiary flow portion 40 do. In such a configuration, each of the flow units 10, 20, and 40 is connected to a pipe P in order to simulate the process of supplying and circulating the driving fluid and the suction fluid like an actual fuel cell system. In particular, each of the flow units 10, 20, and 40 is divided into primary, secondary, and tertiary flow units 10, 20, and 40 based on a point where the pipe P is connected to the ejectors E1 and E2. .

That is, the primary flow portion 10 is configured to simulate the situation of supplying the driving fluid to the ejectors E1 and E2, and the secondary flow portion 20 is fueled by the suction force of the ejectors E1 and E2. It is a configuration for simulating the situation of advancing by inhaling the remaining fluid used in the battery. In addition, the mock-up stack 30 is a device for simulating the fuel function of the fuel cell, the tertiary flow unit 40 is the mock-up stack 30 is the suction fluid sucked by the ejector (E1, E2) This configuration is designed to simulate the situation of resupply with a network.

Here, the ejector (E1, E2) is generated when the high-pressure driving fluid is advanced at a high speed through the nozzles of the ejector (E1, E2) and injected, and the driving fluid passes through the nozzles of the ejector (E1, E2) at high speed It is known that the apparatus is classified into one type of injection pump or fractionation pump which can generate suction force by the negative pressure of surroundings.

By the above configuration, the primary flow part 10 supplies the driving fluid to the ejectors E1 and E2, and the secondary flow part by the suction force generated when the driving fluid is injected through the ejectors E1 and E2. At 20, the suction fluid is supplied to the mock-up stack 30 to simulate the fuel function of the fuel cell. Thereafter, the intake fluid in the form of residual fuel, which simulates the fuel function of the fuel cell and remains, is sucked into the ejectors E1 and E2 and resupplied to the mockup stack 30 through the tertiary flow part 40. It is copied.

In this case, the mock-up stack 30 is configured by connecting the humidifier 31 and the pressure drop device 32 to the suction fluid to simulate the fuel function of the fuel cell. That is, the humidifier 31 and the pressure drop device 32 are intended to form the same conditions as the fluid characteristics of the actual residual fuel, the pressure drop after the suction fluid enters the mock-up stack (30) Through the control, the humidification device 31 generates a water generation phenomenon of the actual fuel performing the fuel function.

In addition, the mock-up stack 30 is configured to install a flow meter 33 between the humidifier 31 and the pressure drop device 32 so as to measure the flow rate when the suction fluid is simulated as actual fuel. In this regard, the driving fluid and the suction fluid select and apply hydrogen gas as the most advantageous fluid when simulated like a real fuel.

In such a configuration, the ejectors E1 and E2 may be applied in plural numbers as in actual fuel cell ejectors due to fuel load factors according to the fuel cell size and capacity. That is, the ejector E1, E2 shown in the drawing has a single ejector E1, E2 at low load and two ejectors E1, E2 at high load. It is implemented as a system with two ejectors. In particular, the ejectors E1 and E2 may be applied to two or more numbers as the size and capacity of the fuel cell are expanded.

In order to apply two or more ejectors E1 and E2 as described above, the pipe P of the primary flow part 10 through which the driving fluid proceeds is branched into a plurality of places, and the ejectors E1 and E2 are branched, respectively. It is installed in the pipe (P). In addition, each of these ejectors (E1, E2) is connected to the pipe (P) of the secondary flow portion 20 for sucking the remaining suction fluid after the fuel function is performed. In addition, corresponding to the above configuration, the pipe P of the tertiary flow part 40 for circulating the injection and suction fluids of the driving fluid is also connected to the ejectors E1 and E2 and collected at a predetermined length point.

More specifically, the pipe P is branched and connected to correspond to the number of ejectors E1 and E2 applied. That is, the pipe P is branched in a section before the driving fluid flows into the ejectors E1 and E2 in the primary flow part 10, and is suctioned after the driving fluid passes through the ejectors E1 and E2. The fluid is collected in the section of the tertiary flow section 40 through which the fluid is circulated, and the suction fluid is branched in the section of the secondary flow section 20 before the advancing to the ejectors E1 and E2 so that each pipe P is ejected. Connected to (E1, E2) is the same as in the drawing.

In the above configuration, each of the pipes (P) where a plurality of ejectors (E1, E2) is installed, the evaluation control to measure and interrupt the progress conditions of the driving fluid and the suction fluid simulated to be supplied and circulated through the ejectors (E1, E2) The assembly 50 is installed.

The evaluation control assembly 50 is composed of a pressure transducer P2-P7, an operation selection valve 51, a suction selection valve 52, and a check valve 53 in each pipe P.

The pressure transducers P2-P7 are respectively installed in the pipe P branched into a plurality of places. Such a pressure transducer (P2-P7) is the pressure of the supply fluid supplied to the ejectors (E1, E2), the pressure of the supply fluid passing through the ejectors (E1, E2), the pressure of the fuel sucked into the ejectors (E1, E2) Is a configuration for detecting and converting respectively.

The operation selection valve 51 is installed in the branched pipe P before the driving fluid passes through the ejectors E1 and E2, respectively. The operation selection valve 51 is configured to interrupt the progress of the driving fluid so that the driving fluid can pass only through the desired ejectors E1 and E2 among the plurality of ejectors E1 and E2. In particular, the operation selection valve 51 is applied as a manual or automatic valve for advancing or blocking the driving fluid to the pipe (P), preferably applied as an automatic valve for the efficient control of the driving fluid.

The suction selection valve 52 is installed in the pipe P before the remaining suction fluid is sucked and passes through the ejectors E1 and E2. That is, the suction selection valve 52 is configured to interrupt the progress of the suction fluid so that the suction fluid can be sucked only to the ejectors E1 and E2 that are selected and operated by the interruption of the operation selection valve 51. This suction selection valve 52 is also applied as a manual or automatic valve such as the operation selection valve (51).

In particular, the suction selection valve 52 is a more accurate and various evaluation of the ejector (E1, E2) in the performance evaluation device of the present embodiment (evaluate in various forms such as measuring the first and second flow conditions simultaneously or separately) Since the supply tank (T) of the driving fluid and the suction fluid is separately provided to perform, the backflow of the suction fluid due to the pressure change of the primary flow and the secondary flow is prevented.

The check valve 53 is respectively installed in the branched pipe (P) in which the drive fluid and the suction fluid is passed through the ejector (E1, E2). Such a check valve 53 is configured to prevent the driving fluid and the suction fluid from flowing back together with the outside air by the operation (malfunction or operation delay time) of the proportional valve 41 of the tertiary flow unit, which will be described later.

In the above configuration, the primary flow unit 10 controls the supply tank T for filling and supplying the driving fluid to the pipe P for supplying and driving the driving fluid, and the pressure drop of the driving fluid being supplied. The regulator 11, the pressure transducer P1 which detects and converts the traveling pressure of a drive fluid, and the flowmeter 12 which measures the traveling flow volume of a drive fluid are provided in order.

In addition, the secondary flow portion 20 is configured by supplying the supply tank (T) for filling and supplying the suction fluid to the pipe (P) to supply the suction fluid, and the above-described mock-up stack (30) are sequentially installed. .

In addition, the third flow part 40 is installed in the proportional valve 41 in the pipe (P) for circulating the supply fluid and the suction fluid injected from the ejector (E1, E2) to be consumed in the actual fuel cell system It is configured to adjust the flow rate and pressure corresponding to a small amount. At this time, the third flow unit 40 may be generated by the operation of the above-mentioned proportional valve 41, the reverse flow of the driving fluid and the suction fluid according to the inflow of the outside air, which is the check valve of the evaluation control assembly 50 Blocked by 53.

Figure 3 is a flow chart of the operation of the ejector performance evaluation apparatus according to the present invention.

Referring to the drawings, when the driving fluid is supplied from the supply tank (T) to the ejectors (E1, E2) to perform the performance evaluation of the ejector (S10), the ejector (E1, E2) injects the driving fluid to the first 1 performs the driving of the flow unit 10. (S20)

Here, in the drawing, since the ejectors E1 and E2 are configured in the form of a double ejector, the driving fluid is divided at branch points of the pipes P and branches to both ejectors E1 and E2. At this time, if you want to drive the primary flow unit 10 by the single ejector (E1, E2) to block the pipe (P) of any one side by the operation selection valve 51 of the evaluation control assembly 50 and In order to perform the driving by the ejectors E1 and E2 on both sides, the driving fluid flows to both sides of the pipe P by opening both of the operation selection valves 51 on both sides.

As described above, when the driving fluid is injected from the ejectors E1 and E2, the negative pressure is generated in the ejectors E1 and E2 and the secondary fluid 20 is driven by sucking the suction fluid filled in the supply tank T. At this time, the suction fluid is sucked is supplied to the mock-up stack (30) and the supply pressure is adjusted by the pressure drop device (32) to perform the fuel function of the actual fuel cell and the humidifier By the process of generating water is simulated. (S40)

Thereafter, the suction fluid remaining after performing the function of fuel in the mock-up stack 30 is advanced by the suction force of the ejectors E1 and E2 and is supplied to the tertiary flow part 40. (S50) As such, 3 The suction fluid in the form of residual fuel that has advanced to the secondary flow unit 40 is simulated by a process of circulating by the pipe P of the tertiary flow unit 40.

Here, the suction fluid suction in the form of residual fuel is sucked only to the ejectors E1 and E2 that are selected and driven by the aforementioned operation selection valve 51 (single ejector selection of one or both sides), and the operation selection for this purpose. Naturally, the suction selection valve 52 is interrupted in a state corresponding to the interrupted state of the valve 51.

Performance evaluation of the ejector (E1, E2) during the execution of the above process is measured the flow rate of the driving fluid and the suction fluid by the flow meters (12, 33) and pressure transducers (P1-P7) installed in each pipe (P) The pressure detection and conversion status can be measured and the result can be obtained.

1 is a schematic view showing a unit cell of a typical fuel cell.

2 is a schematic view of a double ejector performance evaluation apparatus according to the present invention;

Figure 3 is a flow chart of the operation of the double ejector performance evaluation apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: first flow part 20: second flow part

30: mock-up stack 31: humidifier

32: pressure drop device 40: third flow section

50: evaluation control assembly 51: operation selection valve

52: suction selection valve 53: check valve

E1, E2: Ejector P1-P7: Pressure transducer

Claims (8)

The suction fluid is supplied by the suction force of the ejector generated by the driving fluid so that the supplied suction fluid simulates the fuel function in the fuel cell stack, and the remaining suction fluid is circulated by the ejector after the fuel function is simulated. In the ejector performance evaluation apparatus, The pipe P through which the driving fluid proceeds is branched into a plurality of places, and the ejectors E1 and E2 are installed in the branched pipes P, respectively, and a fuel function is performed on each of the ejectors E1 and E2. Performance evaluation device for a double ejector for a fuel cell, characterized in that the pipe (P) for sucking the remaining suction fluid after the connection is connected. The suction fluid is supplied by the suction force of the ejector generated by the driving fluid so that the supplied suction fluid simulates the fuel function of the fuel cell, and the remaining suction fluid is circulated by the ejector after the fuel function is simulated. In the ejector performance evaluation apparatus, At the point where the suction fluid is sucked in order to simulate the fuel function of the fuel cell, a humidifying device 31 and a pressure drop device 32 are connected to the mock-up stack to form the same conditions as the fluid characteristics of the actual residual fuel. 30 is installed, The pipe P through which the driving fluid flows is branched into a plurality of places, and the ejectors E1 and E2 are installed in the branched pipes P, respectively, and the mock-up stack 30 is formed on each of the ejectors E1 and E2. Performance evaluation device for a double ejector for a fuel cell, characterized in that the pipe (P) for sucking the intake fluid for which the fuel function is performed. The method according to claim 1 or 2, Each of the pipes P, in which the plurality of ejectors E1 and E2 are installed, has an evaluation control assembly 50 that measures and interrupts the progress conditions of the driving fluid and the suction fluid supplied and circulated through the ejectors E1 and E2. Performance evaluation device of a double ejector for a fuel cell, characterized in that installed. The method of claim 3, wherein the evaluation control assembly 50 In order to detect and convert the pressure of the supply fluid supplied to the ejectors E1 and E2, the pressure of the supply fluid passing through the ejectors E1 and E2, and the pressure of the fuel sucked into the ejectors E1 and E2, respectively, A performance evaluation device for a double ejector for a fuel cell, characterized in that composed of a pressure transducer (P2-P7) installed in each branched pipe (P). The method of claim 4, wherein the evaluation control assembly 50 The driving fluid is installed in the branched pipes P before passing through the ejectors E1 and E2, respectively, so that the driving fluid can pass only through the desired ejectors E1 and E2 among the plurality of ejectors E1 and E2. A performance evaluation device for a double ejector for a fuel cell, characterized in that it comprises an operation selection valve (51) for intermittently advancing the driving fluid. The method of claim 5, wherein the evaluation control assembly 50 The remaining suction fluid is sucked into the ejectors E1 and E2 which are respectively installed in the pipes P before passing through the ejectors E1 and E2 and are selected and operated by the intermittent operation of the operation selection valve 51. And a suction selection valve (52) for intermittently advancing the suction fluid so as to allow the fluid to be sucked and preventing backflow of the suction fluid. The method of claim 4, wherein the evaluation control assembly 50 The driving fluid and the suction fluid are respectively installed in the branched pipe (P) proceeding through the ejector (E1, E2), characterized in that it comprises a check valve 53 for preventing the driving fluid and the suction fluid back flow by the outside air Performance evaluation device of a double ejector for a fuel cell. The method of claim 1 or 2, wherein the drive fluid and the suction fluid is Performance evaluation device of a double ejector for a fuel cell, characterized in that the hydrogen gas.

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