JPH05135794A - Fuel cell power generator - Google Patents

Abstract

(57) [Summary] [Purpose] To monitor and control the main equipment and devices of fuel cell power generators so that they can operate stably under appropriate conditions. [Configuration] A moisture meter is provided at a main part of the process of the fuel cell power generator to directly or constantly monitor or control the moisture ratio in the gas. For example, in FIG. 1, the reformer 2
A water content meter 8 is provided upstream of the fuel system to monitor the water content in the raw fuel and control the water vapor content in the raw fuel to a predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell power generator for generating electric power from hydrogen gas produced by reacting a hydrocarbon fuel with water vapor and oxygen gas in the air.

[0002]

2. Description of the Related Art FIG. 8 shows, for example, Mitsubishi Electric Technical Report VoL, 5
8, NO. 6 (1984) is a system diagram showing an example of the conventional fuel cell power generator shown in FIG. 6, in which 1 is a fuel cell main body including a fuel electrode 1a, an air electrode 1b, and a cooler 1c, and 2 is a hydrocarbon system. A reformer that reacts fuel (raw fuel) with water vapor to generate a reformed gas containing a large amount of hydrogen, and includes a reaction section 2a and a combustion section 2b. Reference numeral 3 denotes a converter for reducing carbon monoxide in the reformed gas, which has a two-stage structure including a high temperature converter 3a and a low temperature converter 3b. Reference numeral 4 is a desulfurizer for removing the sulfur (S) component in the raw fuel, 5 is a steam separator, 6 is a battery cooling water pump, and 7 is an air device including an air blower.

Next, the operation will be described. The fuel cell body 1 includes a fuel electrode 1a, an air electrode 1b, and a cooler 1c. The fuel electrode 1a is a reformed gas containing a large amount of hydrogen, and the air electrode 1b.
By supplying air to and causing an electrochemical reaction between hydrogen and oxygen, water is generated and electric power is taken out to the outside. Hydrogen is required for the reaction in the fuel electrode 1a, a hydrocarbon-based fuel (raw fuel) such as natural gas is reformed into a hydrogen-rich gas by the reformer 2, and further, monoxide in the reformed gas is converted by the converter 3. Supply after reducing carbon. Here, the raw fuel from which the sulfur (S) content has been removed by the desulfurizer 4 and the steam supplied from the steam separator 5 are mixed and sent to the reaction section 2a of the reformer 2 at a predetermined ratio. Be done. Reaction part 2a
Is filled with a reforming catalyst, where heat is applied from the combustion section 2b to cause a reforming reaction, and the reformed gas containing hydrogen as a main component is reformed.

This reformed gas is supplied to the fuel electrode 1a of the fuel cell main body 1 after water and carbon monoxide react with each other by the conversion catalyst filled in the converter 3 to be converted into carbon dioxide, and the above-mentioned is there. It is consumed in the electrochemical reaction. The remaining excess fuel that has been consumed is sent to the combustion section 2b of the reformer 2, where it is burned and heat is given to the reaction section 2a.

A part of the air from the air device 7 is supplied to the air electrode 1b of the fuel cell main body 1 and consumed by the above-mentioned electrochemical reaction. A cooler 1c is arranged in the fuel cell main body 1 for the purpose of removing the heat associated with the above-mentioned electrochemical reaction, and the cell cooling water circulates in a system including a steam separator 5 and a cell cooling water pump 6. The heat is recovered in the steam separator 5 in the form of steam. The generated steam is used for mixing with the above-mentioned raw fuel.

Now, in such a fuel cell power generator, a control system for supplying raw fuel and water vapor to the reaction section 2b of the reformer 2 at a predetermined mixing ratio (steam / carbon ratio) will be described with reference to FIG. To do. In the figure, the required raw fuel flow rate is calculated by the load command corresponding to the power of the generator,
Correspondingly, the steam flow rate is set so as to have a predetermined steam / carbon ratio capable of maintaining a stable reforming reaction. The flow rate of each of the raw fuel and the steam is controlled by the control valve according to each set value, and then mixed and reformed.
Is supplied to. At this time, if the steam / carbon ratio is lower than the predetermined value, carbon reforming may occur on the reforming catalyst and the reforming reaction may be deteriorated. On the contrary, if the steam / carbon ratio is higher than the predetermined value, excess steam / carbon ratio Water vapor is needed,
Since the efficiency will decrease, it is important to mix the amount of water vapor within a predetermined set value range corresponding to the flow rate of the raw fuel.

On the other hand, at the main parts of the reformer 2, the converter 3, the fuel cell main body 1 and the entire power generator, the composition of the inflowing gas or the outflowing gas changes depending on the respective operating states. The process is monitored and controlled by measuring the temperature, pressure and flow rate or measuring the gas composition with a gas analyzer.

[0008]

In the conventional fuel cell power generator described above, the steam / carbon ratio is monitored or controlled from the ratio of the flow rates of the raw fuel and steam supplied to the reformer 2. Therefore, in order to maintain the steam / carbon ratio properly, it is necessary to measure the flow rate with high accuracy, and if the steam / carbon ratio is lower than the specified value, the reforming catalyst will be affected. There was a problem that carbon breakout occurred and that the efficiency decreased in proportion to the increase of the steam-carbon ratio.

Further, in the conventional fuel cell power generator, the operating state of the reformer 2 is configured to be monitored from the gas temperature or gas composition at the reforming catalyst outlet.
Although it is possible to monitor the operating state of the reformer 2 from the measurement of the gas temperature, it is difficult to monitor the change of the reforming reaction due to the deterioration of the characteristics of the reforming catalyst. There is a problem that the analyzer is expensive, it takes a long time of 1 to 30 minutes for measurement, and it is difficult to constantly monitor and control.

Further, in the conventional fuel cell power generator, the operating state of the converter 3 is configured to be monitored from the gas temperature or gas composition at the outlet of the conversion catalyst.
Although it is possible to monitor the operating state of the converter 3 from the measurement of the gas temperature, it is difficult to monitor the change of the reforming reaction due to the deterioration of the characteristics of the conversion catalyst, and the gas composition is measured by the gas analyzer. However, there is a problem in that it is expensive and it takes a long time for measurement of 1 to 30 minutes to constantly monitor and control.

Furthermore, in the conventional fuel cell power generator, the proportion of water in the hydrogen gas or air supplied to the fuel cell body 1 is controlled by condensation by controlling the temperature of the cooler 20 arranged on the upstream side. Since it is configured, it is relatively easy to reduce excess moisture to a predetermined value or less, but since hydrogen gas and air that are dryer than a predetermined value that is a problem pass through the fuel cell body 1, the electrolyte is There were problems such as the occurrence of pinholes when dried and gas crossover.

Further, in the conventional fuel cell power generator, the operation state of the fuel cell main body 1 is configured to monitor the voltage and temperature of each portion with respect to the current and the process side to monitor from the gas composition. Therefore, there are problems that the gas analyzer is expensive, it takes a long time of 1 to 30 minutes for measurement, and constant monitoring is difficult.

Furthermore, in the conventional fuel cell power generator, after collecting the necessary water in the system from the exhaust gas of the air electrode 1b of the fuel cell body 1, it is discharged out of the system together with the combustion exhaust gas of the reformer 2. It is known that such a structure is used, and in the case of this structure, there is a problem that a white smoke phenomenon occurs due to moisture in the exhaust gas outside the system.

The present invention has been made to solve the above-mentioned problems, and directly or constantly monitors or controls the water content in the gas at the main points of the process of the apparatus, thereby ensuring proper operation of the main equipment and apparatus. The purpose of the present invention is to obtain a fuel cell power generator that can be stably operated under various conditions.

[0015]

In the fuel cell power generator according to claim 1 of the present invention, a moisture meter for raw fuel is provided on the upstream side of the reformer, and the mixing ratio of the raw fuel to be supplied and steam is supplied. It is designed to monitor or control the.

Further, in the fuel cell power generator according to claim 2 of the present invention, a reformer moisture meter is provided on the downstream side of the reformer, and the reforming reaction is monitored or controlled by the moisture content in the reformed gas. It was designed to do.

Also, in the fuel cell power generator according to claim 3 of the present invention, a converter moisture meter is provided on the downstream side of the converter to measure the moisture content in the reformed gas to monitor or control the conversion reaction. It was designed to do.

According to a fourth aspect of the present invention, in the fuel cell power generator, a moisture meter is provided on the upstream side of the fuel electrode or the air electrode of the fuel cell main body to measure the moisture content of the supplied fuel gas or air. It is designed to monitor or control.

According to a fifth aspect of the present invention, in the fuel cell power generator, a fuel cell main body moisture meter is provided on the downstream side of the fuel electrode or the air electrode of the fuel cell main body, and the moisture ratio in each gas is adjusted. It is designed to monitor or control the battery reaction.

Further, in the fuel cell power generator according to claim 6 of the present invention, a moisture meter for exhaust gas is provided in the vicinity of the exhaust of the combustion exhaust gas of the reformer and the exhaust gas of the fuel cell main body from the outside of the system, The water content is monitored or controlled.

[0021]

In the fuel cell power generator according to the first aspect of the present invention, the steam / carbon ratio of the raw fuel of the reformer is monitored or controlled by the signal of the moisture meter for raw fuel.

Further, in the fuel cell power generator according to the second aspect of the present invention, the change in the reforming reaction is monitored or controlled by the signal of the moisture meter for the reformer on the downstream side.

In the fuel cell power generator according to the third aspect of the present invention, the change in the conversion reaction is monitored or controlled by the change in the signal of the moisture meter for the converter on the downstream side.

Further, in the fuel cell power generator according to the fourth aspect of the present invention, the water content in the gas supplied to the fuel cell main body is monitored or controlled by the signal of the water content meter.

Further, in the fuel cell power generator according to the fifth aspect of the present invention, the change in the cell reaction is monitored or controlled by the change in the moisture meter for the fuel cell main body on the downstream side.

Further, in the fuel cell power generator according to the sixth aspect of the present invention, the water content in the gas discharged to the outside of the system is monitored or controlled by the signal of the water content meter for the exhaust gas.

[0027]

【Example】

Example 1. An embodiment of the invention according to claim 1 of the present invention will be described below with reference to the drawings. In FIG. 1, 1 to 7 are the same as or equivalent to the configuration of the above-described conventional device, and the description thereof will be omitted. Reference numeral 8 is a moisture meter for raw fuel arranged downstream of the mixing point of raw fuel and steam and upstream of the reaction section 2a of the reformer 2. As this moisture meter, absorption type,
Specular cooling type, saturated lithium chloride type, aluminum oxide type, etc. can be used. Above all, absorption type and mirror cooling type are suitable from the viewpoint of measuring range, accuracy and response speed. Further, FIG. 2 shows a control system diagram configured by the moisture meter 8 for raw fuel.

Next, the operation will be described. The operation during driving is similar to the operation of the conventional technique described in FIG. 8 above. In FIG. 1, during operation, the moisture ratio for raw fuel supplied to the reaction section 2a of the reformer 2 is directly measured by the moisture meter 8 for raw fuel, and the steam-carbon ratio is maintained at an appropriate value from the measured value. To be monitored. With the control system shown in FIG. 2, when the steam / carbon ratio is lower or higher than the proper value, the steam flow rate is correspondingly controlled and maintained at the proper value. For example, when the change in water content in the raw fuel is ± 1%, the water content in dew point display is about ± 0.2 ° C at 93 ° C, which can be detected with sufficient accuracy. In this way, instead of calculating the steam-carbon ratio from the measurement signals of the raw fuel and steam flow meters, the steam-carbon ratio is calculated directly.
Since the carbon ratio is measured, it is possible to perform highly accurate and highly reliable monitoring and control without the weight of measurement error and measurement delay.

An embodiment of the invention according to claim 2 of the present invention will be described with reference to FIG. In the figure, 1 to 7 are the same as the configuration of the conventional device described above. Reference numeral 9 denotes a reformer moisture meter disposed downstream of the reaction section 2a of the reformer 2 and upstream of the converter 3, and has the same performance as the raw fuel moisture meter 8 of FIG. ..

Next, the operation will be described. The operation during the operation of the apparatus is the same as the operation of the prior art described in FIG. 8 described above. During operation, the moisture meter 9 for reformer monitors the proportion of moisture in the reformed gas generated in the reaction section 2a of the reformer 2, particularly the degree of change. If the steam / carbon ratio can be kept constant and the amount of residual methane increases due to a decrease in the activity of the reforming catalyst and a decrease in temperature, the proportion of water in the reformed gas changes, so the reforming reaction can be monitored and controlled. Here, if there is no abnormality in any other process and the water content increases, the residual methane increases and it is presumed that the activity of the reforming catalyst decreases, and the reforming reaction temperature is raised by a certain percentage. Or, if the reforming reaction temperature exceeds the upper limit or if there is no improvement in the process,
It is judged that the reformer has abnormal operation. For example, when the change in water content in the reformed gas is ± 1%, the water content in the dew point display is 72 ° C.
Is about ± 0.2 ° C, and can be detected with sufficient accuracy. As described above, since the moisture content in the gas can be measured by a simple device in a short time instead of the gas analysis method, it is possible to monitor and control the reforming reaction with a high response speed and high reliability.

An embodiment of the invention according to claim 3 of the present invention will be described with reference to FIG. In the figure, 1 to 7 are the same as the configuration of the conventional device described above. 10 is a converter 3
1 is a moisture meter for a converter arranged downstream of the above and upstream of a heat exchanger, and has the same performance as the moisture meter 8 for raw fuel in FIG.

Next, the operation will be described. The operation during the operation of the apparatus is the same as the operation of the prior art described in FIG. 8 described above. During operation, the water content of the reformed gas converted in the converter 3 is monitored by the water content meter 10 for the converter, in particular, the degree of change thereof is monitored. If the CO conversion rate decreases due to a decrease in the activity of the conversion catalyst, an increase in the reaction pressure, an increase in the reaction temperature, etc., the water content in the reformed gas changes in an increasing direction. The reaction temperature can be monitored and controlled. For example, when the change in water content in the reformed gas is ± 1%, the water content in the dew point display is ± 0.2 ° C at 65 ° C.
It is a degree and can be detected with sufficient accuracy. Thus, rather than measuring the composition of a gas such as carbon monoxide by a gas analysis method, moisture content in the gas can be detected with a simple device in a short time, so that the conversion reaction with a fast response speed and high reliability can be performed. Can monitor and control.

An embodiment of the invention according to claim 4 of the present invention will be described with reference to FIG. In the figure, 1 to 7 are the same as the configuration of the conventional device described above. Reference numeral 11 is a moisture meter for supply gas arranged on the upstream side of the fuel cell main body 1, 11a is a moisture meter for fuel, and 11b is a moisture meter for air, and the same performance as the moisture meter 8 for raw fuel in FIG. With.

Next, the operation will be described. The operation during the operation of the apparatus is the same as the operation of the prior art described in FIG. 8 described above. During operation, the fuel electrode 1a and the air electrode 1 of the fuel body 1 are driven by the fuel moisture meter 11a and the air moisture meter 11b.
The proportion of water in the fuel gas and air supplied to b is monitored. The electrolyte (for example, phosphoric acid) of the fuel cell body 1 is
If the water content in the gas exceeds a predetermined level, the gas will be too wet, and conversely, the water content in the gas will be low and the gas will be in a dry state.
In particular, when the electrolyte is in a dry state, gas crossover occurs, resulting in deterioration of battery characteristics and direct gas reaction. Therefore, it is important to monitor and control water splitting. For example, when the change in water content in fuel gas and air is ± 1%, the water content in dew point display is ± 0.1 ℃ at 21 ℃ and 11 ℃.
It is a degree and can be detected with sufficient accuracy. In this way, the water content of the fuel gas and the air supplied to the fuel cell body 1 can be monitored or the water content can be controlled by adjusting the flow rate of the cooling water of the heat exchanger installed on the upstream side based on the monitoring. The stability and reliability of the operation of the fuel cell body 1 are improved.

An embodiment of the invention according to claim 5 of the present invention will be described with reference to FIG. In the figure, 1 to 7 are the same as the configuration of the conventional device described above. Reference numeral 12 denotes a fuel cell main body moisture meter arranged downstream of the fuel gas and air of the fuel cell main body 1 and has the same performance as the raw fuel moisture meter 8 of FIG.

Next, the operation will be described. The operation during the operation of the apparatus is the same as the operation of the prior art described in FIG. 8 described above. During operation, the water content of the fuel gas and air in the fuel gas discharged from the fuel cell body 1 is monitored by the fuel cell body moisture meter 12. When the fuel cell main body 1 is operating normally, a certain amount of water is generated by the cell reaction, and there is no direct mixing of fuel gas and air (so-called crossover). The water content in the liquid becomes a predetermined value. Therefore, it is possible to monitor whether the fuel cell main body 1 is operating normally by the change in the water content. For example, when the change in water content in the fuel gas and in the air is ± 1%, the water content in the dew point display is about ± 0.2 ° C at 60 ° C, which can be detected with sufficient accuracy.
As described above, since it is possible to monitor whether or not there is an abnormality in the operation of the fuel cell main body 1 by monitoring the proportion of water in the fuel gas or air discharged from the fuel cell main body 1, the stability and reliability of the operation of the fuel cell main body 1 Is improved.

An embodiment of the invention according to claim 6 of the present invention will be described with reference to FIG. In the figure, 1 to 7 are the same as the configuration of the conventional device described above. Reference numeral 13 denotes a moisture meter for exhaust gas, which is arranged on the downstream side in which the air discharged from the fuel cell main body 1 and the combustion gas discharged from the reformer 2 are mixed. It has the same performance as.

Next, the operation will be described. The operation during the operation of the apparatus is the same as the operation of the prior art described in FIG. 8 described above. During operation, the moisture content meter 13 for exhaust gas monitors the moisture content in the exhaust gas from the power generator. In the power generator, the water generated by the cell reaction of the fuel cell body 1
Water in the air is condensed and recovered by a heat exchanger on the downstream side of the air that is mainly discharged, and is used as supply water to the water vapor separator 5. Also, as a power generation device, if the discharged gas contains a large amount of water, there is an environmental problem such as white smoke, so the water content in the discharged gas must be below a specified value. Is. For example, when the change in water content in the exhaust gas is ± 1%, the water content in the dew point display is about ± 0.2 ° C at 52 ° C, which can be detected with sufficient accuracy. In this way, it is possible to monitor the water content in the exhaust gas from the power generator or to control the amount of water recovered by controlling the flow rate of the cooling water in the heat exchanger installed on the upstream side based on it, and to prevent white smoke in the exhaust gas. The operation stability and reliability of the fuel cell power generator are improved.

In the above-described embodiment, the reformer 2, the converter 3, and the fuel cell main body 1 are provided with the moisture meter directly on the upstream side and the downstream side. A pressure reducing or pressure increasing means may be provided. Further, in the above embodiment, the case of the phosphoric acid fuel cell power generator of the normal pressure operation using natural gas as the raw fuel has been described, but the raw fuel is methanol,
It may be naphtha, coal, hydrogen or the like, the operating pressure is arbitrary, and the battery type may be an alkaline type, a molten carbonate type, a solid electrolyte type, or the like, and the same effect as that of the above-mentioned embodiment is obtained.

[0040]

As described above, according to the fuel cell power generator according to claim 1 of the present invention, the moisture meter for raw fuel is arranged upstream of the reformer, and the steam-carbon ratio for raw fuel is set. Is configured so as to be monitored and controlled within a predetermined range, there is an effect that the accuracy is high, carbon protrusion is prevented, and highly efficient reforming operation is obtained.

Further, according to the fuel cell power generator of the second aspect of the present invention, the reformer moisture meter is disposed downstream of the reformer so that changes in the reforming reaction can be caused by the moisture in the reformed gas. Since it is configured to monitor and control the change, the apparatus can be made inexpensive, the change can be detected in a short time, and a stable reforming operation can be obtained.

According to the third aspect of the fuel cell power generator of the present invention, a converter moisture meter is provided downstream of the converter to monitor changes in the conversion reaction based on changes in water content in the reformed gas. -Because it is configured to control, there is an effect that the device can be inexpensive, change can be detected in a short time, and stable conversion operation can be obtained.

Further, according to the fourth aspect of the fuel cell power generator of the present invention, the moisture meter is arranged upstream of the fuel electrode and the air electrode of the fuel cell main body so that the fuel gas and the moisture in the air are predetermined. Since the fuel cell main body is configured to be monitored and controlled within the range, there is an effect that the stable operation of the fuel cell main body can be easily performed.

Further, according to the fifth aspect of the present invention, in the fuel cell power generator, the moisture meter for the fuel cell main body is arranged on the downstream side of the fuel electrode or the air electrode of the fuel cell main body to change the cell reaction. Since it is configured to monitor and control the water content in each exhaust gas, the device can be inexpensive, the change can be detected in a short time, and stable battery operation can be performed.

Further, according to the fuel cell power generator of claim 6 of the present invention, an exhaust gas moisture meter is provided on the exhaust side of the combustion exhaust gas of the reformer and the exhaust gas of the fuel cell main body so that the exhaust gas outside the system is discharged. Since it is configured to monitor and control the water content of
White smoke can be easily prevented, and there is an effect that operation with high environmental conservation can be performed.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a fuel cell power generator according to claim 1 of the present invention.

FIG. 2 is a control system diagram showing a control system of the fuel cell power generator of FIG.

FIG. 3 is a system diagram showing monitoring and control of a reformer of a fuel cell power generator according to claim 2 of the present invention.

FIG. 4 is a system diagram showing a converter / control of a fuel cell power generator according to claim 3 of the present invention.

FIG. 5 is a system diagram showing monitoring / control of the fuel cell main body supply gas of the fuel cell power generator according to claim 4 of the present invention.

FIG. 6 is a system diagram showing monitoring and control of the fuel cell main body of the fuel cell power generator according to claim 5 of the present invention.

FIG. 7 is a system diagram showing exhaust gas monitoring / control of the fuel cell power generator according to claim 6 of the present invention.

FIG. 8 is a system diagram showing an example of a conventional fuel cell power generator.

FIG. 9 is a control system diagram showing an example of a control method of a conventional fuel cell power generator.

[Explanation of symbols]

 1 Fuel Cell Main Body 2 Reformer 3 Converter 4 Desulfurizer 5 Steam Separator 6 Battery Cooling Water Pump 7 Air Device 8 Moisture Meter for Raw Fuel 9 Moisture Meter for Reformer 10 Moisture Meter for Converter 11 Moisture Meter for Supply Gas 12 Moisture meter for fuel cell body 13 Moisture meter for exhaust gas

Claims (6)

[Claims] 1. A fuel cell power generator comprising a fuel cell main body and a reformer for reacting raw fuel with steam to produce hydrogen gas, wherein the raw fuel and steam are provided upstream of the reformer. A fuel cell power generation device, comprising a moisture meter for raw fuel for monitoring or controlling the mixing ratio of. 2. A fuel cell power generator comprising a fuel cell body and a reformer for reacting raw fuel with water vapor to produce hydrogen gas, wherein the reformer is provided downstream of the reformer. 2. A fuel cell power generator comprising a reformer moisture meter for monitoring the water content in the reformed gas and monitoring or controlling the reforming reaction. 3. A fuel cell power generator comprising a fuel cell body, a reformer for reacting raw fuel with water vapor to produce hydrogen gas, and a converter arranged downstream of the reformer. In the fuel cell power generation, the converter moisture meter is provided on the downstream side of the converter to monitor the water content in the reformed gas from the converter and monitor or control the conversion reaction. apparatus. 4. A fuel cell power generator including a fuel cell main body, a reformer for supplying a fuel gas to a fuel electrode of the fuel cell main body, and an air device for supplying air to an air electrode of the fuel cell main body. 2. A fuel cell power generator according to claim 1, further comprising a moisture meter disposed upstream of the fuel electrode or the air electrode of the fuel cell main body for monitoring or controlling the water content in each gas. 5. A fuel cell power generator including a fuel cell main body, a reformer for supplying a fuel gas to a fuel electrode of the fuel cell main body, and an air device for supplying air to an air electrode of the fuel cell main body. In the above, a moisture meter for a fuel cell main body is provided on the downstream side of the fuel electrode or the air electrode of the fuel cell main body for monitoring the water content in each gas and monitoring or controlling the operation of the fuel cell main body. A fuel cell power generator characterized in that 6. A fuel cell power generator comprising a fuel cell body, a reformer for supplying a fuel gas to a fuel electrode of the fuel cell body, and an air device for supplying air to an air electrode of the fuel cell body. In the above, the exhaust gas moisture meter for monitoring or controlling the moisture in the exhaust gas is disposed in the vicinity of discharging the combustion exhaust gas of the reformer and the exhaust gas of the combustion cell body out of the system. Fuel cell power generator.