JP2009026604A - Fuel cell power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell power generation device in which cooling water used for heat recovery of the heat generated in a package can be utilized for freezing prevention of the fuel cell power generation device and the energy is effectively utilized without consuming a wasteful power. <P>SOLUTION: The fuel cell power generation device houses in a package 1 a fuel reformer 25 to steam-reform a fuel gas, a fuel cell main body 21 which generates electricity and thermal energy based on an electrochemical reaction of the steam-reformed fuel gas and air, and a heat exchanger 2 which heat-exchanges the heat generated in a device and exhausts to the outside. A branched piping 10 is installed along the floor face 1a or wall faces of the package, and cooling water which has recovered exhaust heat of the package 1 by the heat exchanger 2 is made to flow in the branched piping 10, and the floor face 1a or wall faces of the package are heated by the heat radiation from the branched piping 10 to warm inside the package 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fuel cell power generator having a function of preventing freezing of equipment housed in a package.

  Conventionally, there is a fuel cell power generation device that generates electricity and thermal energy based on an electrochemical reaction between a fuel gas obtained by steam reforming a fuel gas and air. The fuel cell power generator is designed to prevent freezing in a package in which the fuel cell main body is installed. For example, a temperature sensor detects a decrease in the outside air temperature, operates the cooling water system device when the outside air temperature falls below a threshold value, and prevents the cooling water system device from being frozen by circulating hot water using a heater (for example, Patent Document 1). There is one in which hot water is introduced from a hot water tank installed outside the package to prevent the equipment in the package from freezing (for example, see Patent Document 2). In addition, the amount of drive of the ventilation fan is changed in accordance with the temperature in the package to adjust the temperature in the package to prevent the equipment from freezing (see, for example, Patent Document 3). There is a method for preventing freezing of equipment in a package by a method of supplying it as hot air (for example, see Patent Document 4).

  FIG. 9 is a schematic view of a fuel cell power generator in which a heating element is installed in the package to prevent the equipment from freezing. A package 1 of a fuel cell power generator comprises a fuel reforming system for steam reforming a fuel gas, and a fuel cell main body that generates electricity and thermal energy based on an electrochemical reaction between the steam reformed fuel gas and air. Store. The package 1 includes a heat exchanger 2 for exhausting heat generated in the apparatus by the fuel reforming equipment and the fuel cell main body. As the heat exchanger 2, there are a battery cooling system heat recovery heat exchanger and an exhaust gas heat recovery heat exchanger, which will be described later. In addition, a space heater 3 is installed in the package 1 to prevent the device from freezing, the temperature in the package is detected by the temperature sensor 4, and the temperature is controlled by the space heater 3 so that the detected temperature does not fall below the freeze prevention temperature. is doing.

  On the other hand, a cooling water circulation system 9 for circulating cooling water from outside the package 1 is disposed in the heat exchanger 2. Cooling water is supplied to the heat exchanger 2 by the pump 5 installed in the return-side piping 9b of the cooling water circulation system 9, and the cooling water heated by the heat exchanger 2 is heated, for example, via the outgoing-side piping 9a. It returns to the air-cooled cooler 7. The cooling water is cooled by releasing the heat of the cooling water to the outside air by the cooler 7. The cooling water cooled by the cooler 7 is returned again to the return-side pipe 9b through the control valve 6. The circulating flow rate of the cooling water is controlled by feeding back the cooling water temperature detected by the cooling water temperature detector 8 to the control valve 6.

As described above, in the conventional fuel cell power generation device, freezing is prevented by the heat of the space heater 3, and the heat generated in the package 1 is discharged out of the package 1 through the heat exchanger 2 and is cooled by the cooler 7. It was cooling.
JP-A-11-214025 JP 2003-282105 A JP 2003-36874 A JP 2006-252964 A

  However, since the conventional fuel cell power generator only exhausts the exhaust heat in the package to the outside of the system, the heat generated in the package is not effectively used, and wasteful power is consumed to prevent freezing. It was.

  The present invention has been made in view of the above points, and the cooling water used for recovering the heat generated in the package can be used for preventing freezing of the fuel cell power generation apparatus, and wasteful power is consumed. It is an object of the present invention to provide a fuel cell power generator that can effectively use energy without having to do so.

  A fuel cell power generator according to the present invention includes a fuel reforming system for steam reforming a fuel gas, and a fuel cell main body that generates electricity and thermal energy based on an electrochemical reaction between the steam reformed fuel gas and air And a heat exchanger for exchanging heat generated in the apparatus and exhausting the heat to the outside, the cooling water is supplied to the heat exchanger from the outside of the package, and exhaust heat is recovered in the heat exchanger. A fuel cell power generator comprising a cooling water pipe for discharging the cooled water to the outside of the package, wherein a part of the cooling water is passed from the cooling water pipe to a pipe provided adjacent to the floor or wall surface of the package And a branch pipe for returning to the cooling water pipe is provided.

  According to this configuration, a part of the cooling water recovered in the heat exchanger in the heat exchanger is diverted into the pipe provided adjacent to the floor or wall surface of the package by the branch pipe, so that it is wasted by the heating element or the like. It is possible to prevent freezing while effectively using energy without consuming electric energy.

  In the fuel cell power generator, the present invention is characterized in that a radiator is provided on a floor surface or a wall surface of the package, and heat of the cooling water flowing through the branch pipe is released through the radiator.

  With this configuration, by actively dissipating heat from the package floor or wall surface via the heatsink, it is possible to blow air as concentrated warm air around the equipment that requires antifreezing, and more reliably prevent freezing. be able to.

  According to the present invention, in the fuel cell power generator, a manual valve for adjusting a cooling water amount is provided in the branch pipe.

  With this configuration, since a manual valve is provided in the branch pipe used for freezing prevention, the flow rate can be adjusted according to the outside air temperature and the season, and freezing prevention according to the change in the season and the air temperature can be performed.

  According to the present invention, in the fuel cell power generator, an adjustment valve for adjusting a cooling water amount is provided in the branch pipe, and the opening degree of the adjustment valve is automatically controlled so that the temperature in the package becomes a target temperature. Features.

  With this configuration, a control valve is provided on the branch piping used to prevent freezing, so the flow rate can be adjusted automatically according to the outside air temperature and season, and freezing prevention can be performed according to changes in the season and temperature. Can do.

  According to the present invention, the cooling water discharged in the exhaust heat treatment can be used for preventing freezing of the fuel cell power generation apparatus, and energy can be effectively used without consuming unnecessary power.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a schematic configuration diagram of a fuel cell power generator according to a first embodiment of the present invention. The same parts as those in the fuel cell power generation apparatus of FIG.

  In the fuel cell power generator of the present embodiment, a branch pipe 10 branched from the cooling water circulation system 9 is laid along the floor surface 1a at the bottom of the package 1. The cooling water which recovered the exhaust heat in the package 1 in the heat exchanger 2 is passed through the branch pipe 10, and the floor 1 a of the package 1 is heated by heat radiation from the branch pipe 10 to warm the inside of the package 1. Yes. One end of the branch pipe 10 communicates with the return path side pipe 9b of the coolant circulation system 9, and the other end of the branch pipe 10 communicates with the forward path side pipe 9a. A manual valve 11 is provided in the middle of the branch pipe 10 so that the cooling water flows from the return-side pipe 9b side to the forward-side pipe 9a side with respect to the branch pipe 10 and the flow rate can be adjusted. In the present embodiment, the cooling water after being cooled by the cooler 7 is introduced into the branch pipe 10, but as described later, the cooling water after cooling has a temperature that can be sufficiently used to prevent freezing. Yes. If the flow rate of the cooling water flowing through the branch pipe 10 is increased, the heat energy radiated from the branch pipe 10 is increased and the temperature can be raised. Further, if the flow rate of the cooling water flowing through the branch pipe 10 is reduced, the heat energy radiated from the branch pipe 10 is reduced and the temperature can be lowered. Therefore, by operating the manual valve 11 and adjusting the flow rate of the cooling water, it is possible to flexibly cope with seasonal fluctuations and temperature changes, and the temperature in the package 1 can always be maintained at an appropriate temperature during operation. .

FIG. 2 is a schematic view showing a state in which the branch pipe 10 is laid on the floor surface 1 a of the package 1.
The branch pipe 10 is arranged on the entire floor surface 1a of the package 1 by arranging the branch pipe 10 while meandering from one end of the floor surface 1a of the package 1 to the other end.

  In the present embodiment, as shown in FIG. 3, the branch pipe 10 laid along the floor surface 1 a of the package 1 is covered with a heat insulating material 12. By covering the branch pipe 10 with the heat insulating material 12, it is possible to prevent the heat released from the branch pipe 10 from escaping to the outside.

FIG. 4 is a system diagram in the package 1 of the fuel cell power generator of this embodiment.
The fuel cell main body 21 constituting the fuel cell stack includes a plurality of unit cells including a fuel electrode 22 and an air electrode 23, and a cooling plate 24 having a cooling pipe disposed every time a plurality of the unit cells are stacked. Is done. A fuel reformer 25 and a CO converter 26 as fuel reforming equipment are provided in the front stage of the fuel cell main body 21.

  A combustion air blower 27 is connected to the burner of the fuel reformer 25. The fuel reformer 25 generates a reformed gas obtained by reforming a raw fuel such as natural gas supplied through the raw fuel supply system 28 into a gas rich in hydrogen. In the fuel reformer 25, the water is separated by the water vapor separator 29 and supplied through the water vapor supply system 30, and the gas is rich in hydrogen by being heated by the combustion heat by the off-gas combustion in the burner under the reforming catalyst. To produce reformed gas. The reformed gas generated by the fuel reformer 25 is supplied to the fuel electrode 22 of the fuel cell main body 21 via the reformed gas supply system 31 having the CO converter 26. On the other hand, off gas containing hydrogen that does not contribute to the cell reaction is supplied from the fuel electrode 22 as fuel to the burner of the fuel reformer 25 via the off gas supply system 32. The flue gas discharged from the fuel reformer 25 is sent to the water recovery condenser 34 by the flue gas system 33. A heat exchanger 50 is provided in the off gas supply system 32 and the combustion exhaust gas system 33. The heat exchanger 50 also performs heat exchange of air introduced by the combustion air blower 27.

  The fuel cell main body 21 includes an air supply system 36 that includes a reaction air blower 35 that supplies air to the air electrode 23, and an air discharge system 37 that supplies the air after the battery reaction to the water recovery condenser 34. It is connected.

  A cooling water circulation system 38 is connected to the cooling pipe of the cooling plate 24 of the fuel cell main body 21 in order to circulate the cooling water when the fuel cell main body 21 generates power. The cooling water circulation system 38 includes a water vapor separator 29, a battery cooling water circulation pump 39, and a battery cooling system heat recovery heat exchanger 40. The battery cooling system heat recovery heat exchanger 40 is supplied with the high temperature water cooled from the battery cooling system return path side pipe 41 and the exhausted heat recovered high temperature water is taken out of the package via the battery cooling system forward path side pipe 42. . After cooling the high-temperature water recovered by exhaust heat with a cooler installed outside the package, it is supplied as high-temperature water cooled from the piping 41 on the return side of the battery cooling system.

  In the water vapor separator 29, the cooling water that has become a two-phase flow of water and steam discharged from the cooling pipe of the fuel cell main body 21 is separated into water vapor and cooling water. The separated water vapor is sent out through the water vapor supply system 30 so as to be mixed with the raw fuel going to the fuel reformer 25. At that time, the ejector 43 is used to mix the raw fuel having a low original pressure and the water vapor. The ejector 43 uses steam as a driving fluid and raw fuel as a driven fluid. The raw fuel supply system 28 supplies the raw fuel to the ejector 43 via the desulfurization reactor 44.

  A combustion exhaust gas system 33 and an air discharge system 37 are connected to the condenser 34 for water recovery, respectively, and includes a tank 45 for storing condensed water. The water recovery condenser 34 operates as an exhaust gas heat recovery heat exchanger that cools the exhaust gas sent from the combustion exhaust gas system 33 and the air exhaust system 37 with cooling water and condenses water vapor in the exhaust gas to recover heat. Process exhaust is discharged from the tank 45 of the water recovery condenser 34 to the outside of the package. Further, when the amount of recovered water falls below a predetermined value, the makeup water is supplied to the tank 45 from outside the package.

  The tank 45 of the water recovery condenser 34 is connected to an exhaust gas condensing system return pipe 46 for supplying recovered water cooled for exhaust gas condensation from outside the package into the tank. The tank 45 is connected to an exhaust gas condensing system forward piping 47 that takes out the recovered water whose temperature has been increased by recovering heat from the exhaust gas from the tank 45 to the outside of the package and leads it to a cooler (not shown). The recovered water is circulated between the tank 45 of the condenser for water recovery 34 and the cooler outside the package by a recovered water circulation pump 48 provided in the exhaust gas condensing system forward piping 47.

  The recovered water is taken out from the lower part of the water recovery condenser 34 by the recovered water pump 51 and supplied to the water treatment device 53 via the heat exchanger 52. The recovered water is introduced into the water treatment device 53 and purified, and then supplied to the upstream side of the battery cooling water circulation pump 39 in the cooling water circulation system 38 by the cold water pump 54. A part of the water purified by the water treatment device 53 is stored in the reserve tank 55. A part of the recovered water taken out from the tank 45 by the recovered water pump 51 and cooled by the heat exchanger 52 is stored in the reserve tank 55 via the inverter device 56.

  In the fuel cell power generator configured as described above, the cooling water (high temperature) is recovered by the battery cooling system heat recovery heat exchanger 40 and led to the cooler outside the package through the battery cooling system forward piping 42. The heat of water) is used to prevent the equipment in the package 1 from freezing.

  In this case, the heat exchanger 2 in FIG. 1 corresponds to the heat exchanger 40 for battery cooling system heat recovery, the forward path side pipe 9a in FIG. 1 corresponds to the battery cooling system forward path pipe 42, and the return path side pipe 9b in FIG. Corresponds to the battery cooling system return-side piping 41. 2 and 3 show the floor 1a of the package 1 that houses the fuel cell main body 21, the fuel reformer 25, the water recovery condenser 34, the battery cooling system heat recovery heat exchanger 40, and the like shown in FIG. The branch pipe 10 is laid as described above. One end of the branch pipe 10 is connected to the battery cooling system forward pipe 42 drawn out of the package, and the other end of the branch pipe 10 is connected to the battery cooling system return path side pipe 41 drawn out of the package. When the manual valve 11 is provided in the branch pipe 10 and there is a risk of freezing due to a decrease in the temperature in the package 1, the manual valve 11 is opened to cool through the branch pipe 10 from the battery cooling system return side pipe 41. The water is returned to the battery cooling system forward side piping 42.

  During the operation of the fuel cell power generator, the coolant is circulated through the coolant circulation system 38 by the battery coolant circulation pump 39. The cooling water circulating in the cooling water circulation system 38 recovers the heat of the fuel cell main body 21 when passing through the cooling plate 24 in the fuel cell main body 21 and becomes high in temperature. The cooling water whose temperature has been raised by recovering the heat of the fuel cell main body 21 is supplied to the battery cooling system heat recovery heat exchanger 40, where it exchanges heat with the cooling water supplied from the battery cooling system return pipe 41. Thus, the heat of the cooling water in the cooling water circulation system 38 is recovered.

  On the other hand, the cooling water recovered in the battery cooling system heat recovery heat exchanger 40 is sent to the cooler 7 by the battery cooling system forward path side pipe 42 and cooled to about 80 ° C., and then the battery cooling system return path side. All or part of the pipe 41 is led to the branch pipe 10. At this time, the flow rate of the cooling water introduced into the branch pipe 10 is adjusted by the manual valve 11. When the cooling water whose temperature has been raised by heat recovery flows through the branch pipe 10 laid on the entire surface of the package floor 1 a, the package floor 1 a is warmed by heat radiation from the branch pipe 10 and stored in the package 1. It is possible to prevent the device from freezing. When the valve opening is increased by operating the manual valve 11, the amount of cooling water flowing into the branch pipe 10 from the battery cooling system forward pipe 42 increases, and the thermal energy released per unit time to the package floor 1a is increased. Since it becomes large, the heating effect of the apparatus accommodated in the package 1 can be raised. Conversely, when the manual valve 11 is operated to reduce the valve opening, the amount of cooling water flowing into the branch pipe 10 from the battery cooling system return pipe 42 decreases, and the heat energy released per unit time to the package floor 1a. Therefore, the heating effect of the device accommodated in the package 1 can be reduced. In this manner, the manual valve 11 can be operated to adjust the temperature in the package 1 to an arbitrary temperature that can prevent the equipment from freezing.

  Further, in the fuel cell power generator, the water recovery condenser 34 is the heat exchanger 2 of FIG. 1, and the cooling led from the water recovery condenser 34 to the cooler outside the package through the exhaust gas condensation system forward piping 47. You may comprise so that the heat of water may be utilized for the freeze prevention of the apparatus in the package 1. FIG.

  In this case, the water recovery condenser 34 corresponds to the heat exchanger 2 in FIG. 1, the exhaust gas condensing system outbound pipe 47 corresponds to the outbound pipe 9a in FIG. 1, and the exhaust gas condensing system in the return path 9b in FIG. The return pipe 46 corresponds to this. One end of the branch pipe 10 is connected to the exhaust gas condensing system forward pipe 47 drawn out of the package, and the other end of the branch pipe 10 is connected to the exhaust gas condensing system return pipe 46 drawn out of the package.

  During operation of the fuel cell power generator, exhaust gas containing water vapor is supplied from the combustion exhaust gas system 33 and the air exhaust system 37 to the water recovery condenser 34 and exhaust gas is also supplied from the water vapor separator 29. . The exhaust gas is cooled by the cooling water supplied from the exhaust gas condensing system forward piping 47 into the tank 45, and the water vapor in the exhaust gas is condensed. The temperature of the recovered water generated by the condensation of water vapor in the exhaust gas is increased by the thermal energy of the exhaust gas. In this way, the cooling water whose temperature has been increased by recovering heat from the exhaust gas in the water recovery condenser 34 is taken out of the package through the exhaust gas condensing system forward piping 47 by the recovered water circulation pump 48. The condensed water sent to the cooler 7 by the exhaust gas condensing system forward piping 47 is cooled to about 40 ° C., and then flows into the branch piping 10 from the exhaust gas condensing system return piping 46. As a result, the package floor surface 1a is warmed by the heat radiation from the branch pipe 10, and the equipment stored in the package 1 can be prevented from freezing. When the manual valve 11 is operated to increase the valve opening, the amount of high-temperature cooling water flowing from the exhaust gas condensing system forward piping 47 into the branch piping 10 increases, and the thermal energy released per unit time to the package floor 1a. Becomes larger. Further, when the manual valve 11 is operated to reduce the valve opening, the amount of cooling water flowing into the branch pipe 10 from the exhaust gas condensing system forward piping 47 decreases, and the thermal energy released per unit time to the package floor 1a is reduced. Get smaller. In this way, the manual valve 11 can be operated to adjust the temperature in the package 1 to an arbitrary temperature at which the equipment can be prevented from freezing.

  As described above, according to the present embodiment, the heat of the cooling water (high-temperature water) flowing through the battery cooling system return-side piping 41 can be used for preventing freezing of the equipment in the package 1, and fuel cell power generation The heat energy of the cooling water discarded in the exhaust heat treatment of the apparatus can be used for preventing freezing of the fuel cell power generation apparatus, and the energy can be effectively used without consuming unnecessary power.

  Further, according to the present embodiment, the heat of the cooling water (low temperature water) flowing through the exhaust gas condensing system return pipe 46 can be used for preventing the equipment in the package 1 from being frozen, and wasteful power is consumed. The energy can be effectively used to prevent the equipment from freezing.

  The package floor 1a was heat-recovered by heat exchange with a branch pipe into which the cooling water heat-recovered by heat-exchanged by the battery-cooling system heat-recovery heat exchanger 40 and water condenser 34 were introduced. Two systems with a branch pipe into which cooling water is introduced may be laid, or even if only one of the systems can be provided, the same effect can be expected.

  In the embodiment described above and shown in FIG. 1, the cooling water after being cooled by the cooler 7 is configured to flow from the return-side pipe 9b to the branch pipe 10 to the forward-side pipe 9a. And the branch pipe 10 are connected to the upstream side of the pump 5, and the cooling water after heat recovery by the battery cooling system heat recovery heat exchanger 40 or the water recovery condenser 34 is supplied from the forward path side pipe 9 a. It is good also as a structure which is introduce | transduced into the branch piping 10 and flows to the return side piping 9b direction, In this case, the cooling water heated up by the heat exchanger 2 and used as a high temperature can be utilized for freeze prevention.

(Second Embodiment)
FIG. 5 is a schematic configuration diagram of a fuel cell power generator according to a second embodiment of the present invention. The same parts as those of the fuel cell power generator of the first embodiment described above are denoted by the same reference numerals to avoid duplication of explanation. The battery cooling system heat recovery heat exchanger 40 and / or the water recovery condenser 34 (exhaust gas heat recovery heat exchanger) shown in FIG.

  The fuel cell power generator according to the present embodiment includes a radiator 60 in the branch pipe 10 disposed on the package floor 1a. FIG. 6 is a schematic perspective view of the heat radiator 60, and FIG. 7 is a cross-sectional view of the heat radiator 60. The radiator 60 exposes a part of the radiation fins 61 arranged along the package floor surface 1a from the package floor surface 1a into the package. Further, the branch pipe 10 is passed through the heat radiation fins 61 protruding from the package floor 1a to the outside of the package so that the heat of the branch pipe 10 is directly transmitted to the heat radiation fins 61. Further, in the present embodiment, the heat radiating fins 61 and the branch pipe 10 that are outside the package are covered with a heat insulating material 62 so that heat does not escape to the outside. Other configurations are the same as those of the first embodiment.

  In the present embodiment configured as described above, the heat exchanger 2 housed in the package recovers heat from the cooling water of the battery cooling system or the heat recovered from the exhaust gas from the outward piping 9a to the cooler. 7 and cooled to a predetermined temperature (for example, 40 ° C or 80 ° C). Cooling water discharged from the cooler 7 is sent to the heat exchanger 2 side by the pump 5, and a part of the coolant is supplied from the return path side pipe 9 b to the radiator 60 through the branch pipe 10. In the radiator 60, heat is transmitted to the radiation fins 61 that are in contact with the branch pipe 10 on the package floor 1 a (outside the package), and heat is released into the package 1 from a part of the radiation fins 61 exposed in the package 1. Is done.

  In this way, heat is directly transmitted from the branch pipe 10 to the radiation fin 61 on the package floor 1a (outside of the package), and further, the heat is transmitted through the radiation fin 61 itself to the end of the radiation fin 61 exposed in the package 1. Since heat is radiated within the package 1, heat can be efficiently released.

(Third embodiment)
FIG. 8 is a schematic configuration diagram of a fuel cell power generator according to a third embodiment of the present invention. The same parts as those of the fuel cell power generators of the first and second embodiments described above are denoted by the same reference numerals to avoid duplication of explanation.

  The fuel cell power generator according to the present embodiment is a branch pipe 10 disposed between an outward path side pipe 9a and a return path side pipe 9b, and an adjustment valve 62 is provided between the radiator 60 and the outward path side pipe 9a. On the other hand, a temperature sensor 63 is installed in the package 1. The package internal temperature detected by the temperature sensor 63 is input to the regulating valve 62, and the valve opening degree of the regulating valve 62 is automatically controlled so that the package internal temperature becomes the target temperature.

  In this way, the temperature sensor 63 detects the temperature in the package and feeds it back to the regulating valve 62, and the coolant flow rate is automatically adjusted by the regulating valve 62 so that the package temperature becomes the target temperature. Without manually operating the coolant flow rate, it is possible to automatically respond to seasonal variations and temperature changes.

  In the above description, the branch pipe 10 is laid on the floor surface 1a of the package 1. However, even if the branch pipe 10 is provided on the wall surface of the package 1, the same effect can be obtained. In addition, by providing the branch pipes 10 on both the floor surface 1a and the wall surface of the package 1, the heating effect can be further enhanced as compared with the case where it is provided on either one. Further, the flow direction of the cooling water to the branch pipe 10 is not limited to the direction from the return path side pipe 9b to the forward path side pipe 9a, but can be designed in the opposite direction.

  The present invention is applicable to a fuel cell power generation apparatus in which a device housed in a package may freeze during power generation operation.

1 is a schematic configuration diagram of a fuel cell power generator according to a first embodiment. Schematic which shows the state which laid cooling water piping in the package floor in 1st Embodiment Partial sectional view of the vicinity of the package floor in the first embodiment System diagram in the package of the fuel cell power generator of the first, second and third embodiments Schematic configuration diagram of a fuel cell power generator according to a second embodiment Schematic perspective view of a radiator in the second embodiment Sectional drawing of the heat radiator in 2nd Embodiment Schematic configuration diagram of a fuel cell power generator according to a third embodiment Schematic configuration diagram of a conventional fuel cell power generator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Package, 2 ... Heat exchanger, 3 ... Space heater, 4 ... Temperature sensor, 5 ... Pump, 6 ... Control valve, 7 ... Cooler, 8 ... Coolant temperature detector, 9 ... Coolant circulation system, 9a ... Outward piping, 9b ... Return piping, 10 ... Branch piping, 21 ... Fuel cell body, 22 ... Fuel electrode, 23 ... Air electrode, 24 ... Cooling plate, 25 ... Fuel reformer, 26 ... CO transformer, 27 ... Combustion air blower, 28 ... Raw fuel supply system, 29 ... Steam separator, 30 ... Steam supply system, 31 ... Reformed gas supply system, 32 ... Off gas supply system, 33 ... Combustion exhaust gas system, 34 ... For water recovery Condenser, 35 ... Reaction air blower, 36 ... Air supply system, 37 ... Air discharge system, 38 ... Cooling water circulation system, 39 ... Battery cooling water circulation pump, 40 ... Heat exchanger for heat recovery of battery cooling system, 41 ... Battery Cooling system return-side piping, 42... Battery cooling system outbound-side piping, 43 Ejector, 44 ... desulfurization reactor, 45 ... tank, 46 ... exhaust gas condensing system return piping, 47 ... exhaust gas condensing system outgoing piping, 48 ... recovered water circulation pump, 50 ... heat exchanger, 51 ... recovered water pump, 52 ... heat exchange , 53 ... Water treatment device, 54 ... Cold water pump, 55 ... Reserve tank, 56 ... Inverter device, 60 ... Radiator, 61 ... Radiation fin, 62 ... Regulating valve, 63 ... Temperature sensor

Claims (4)

Fuel reforming equipment for steam reforming fuel gas, a fuel cell body that generates electricity and thermal energy based on an electrochemical reaction between steam reformed fuel gas and air, and heat generated in the apparatus A heat exchanger that exchanges heat and discharges it to the outside is housed in the package, and cooling water is supplied to the heat exchanger from outside the package, and the cooling water recovered in the heat exchanger is discharged to the outside of the package. A fuel cell power generator comprising a cooling water pipe,
A branch pipe is provided that divides a part of the cooling water from the cooling water pipe into a pipe provided adjacent to the floor or wall surface of the package and then returns to the cooling water pipe. Fuel cell power generator.   The fuel cell power generator according to claim 1, wherein a radiator is provided on a floor surface or a wall surface of the package, and heat of the cooling water flowing through the branch pipe is released via the radiator.   The fuel cell power generator according to claim 1 or 2, wherein a manual valve for adjusting a cooling water amount is provided in the branch pipe.   The adjustment valve for adjusting the cooling water amount is provided in the branch pipe, and the opening degree of the adjustment valve is automatically controlled so that the temperature in the package becomes a target temperature. Fuel cell power generator.

Images