JP4747547B2 - Fuel cell cogeneration system - Google Patents

Description

  The present invention relates to a configuration of a household fuel cell cogeneration system that generates power using a fuel cell.

A conventional fuel cell cogeneration system for home use has a configuration as shown in FIG. 4 (see, for example, Patent Document 1). That is, in the fuel cell power supply device incorporating the power conversion device 37, the control device 35, and auxiliary equipment, the reformer 32 and the burner device 33 are provided in the upper stage, and the control device 35 is disposed in the middle stage and the main body of the fuel cell 36 is disposed behind it. is doing.
JP 2003-297409 A

  However, the conventional household fuel cell cogeneration system has a plurality of functional parts inside the housing, and it is difficult to effectively cool the internal parts at the cooling opening set at the bottom of the housing. A part used in a household water heater or the like having a plurality of functional parts cannot be used in a heat resistant manner, and has a problem that the service life is shortened in a durable manner. In addition, since the number of functional parts and component parts is about three times that of household water heaters, etc., there is a lot of wiring from the control device, especially when incorporating heavy reformers and removal during maintenance. It often happened that a wire was hooked and the wiring was disconnected or cut.

  The present invention solves the above-described conventional problems, and effectively provides cooling air taken from an opening provided in a lower portion of the casing to the entire interior of the casing, so that a component having no temperature margin can be provided with durability. The purpose is to make it easy to prevent the lead wires from being caught or detached during assembly and maintenance.

In order to solve the conventional problems, household fuel cell cogeneration system of the present invention comprises a housing, a said housing fuel cell cogeneration system having a reformer as a hydrogen generating apparatus in central the above the reformer comprises a water-related parts of the cooling water tank and pure water supply of water supply to the fuel cell and a fuel cell, wherein the control device on the left side of the reformer and the inverter device and the reformer It includes an ion exchange resin cylinder of a pure water supply device for quality reaction, and on the right side of the reformer is a fuel supply component including a raw material supply valve and a booster pump to the reformer and exhaust heat recovery to a hot water storage tank heat exchange and comprising a condensed water tank and the flow control equipment for storing the condensed water from the condensed water and the fuel cell from the exhaust heat, has a space formed between the reformer and the housing of the bottom plate The lower part of the housing to guide the air into the space Opening is arranged, the drain water automatic drain tank the return from the condensed water tank to the space at the bottom of the reformer to condense the reformed gas water pipe and the fuel cell to the ion exchange resin column to the reformer The circuit is arranged and wiring from the control device on the left side to the fuel supply unit configured on the right side of the reformer is arranged.

  As a result, the cooling air taken in from the opening provided in the lower part of the casing is once guided to the space below the reformer, so that the cooling air can be dispersed throughout the casing and the temperature rise of the parts can be suppressed. By arranging the wiring from the control device in the space, it is possible to prevent the lead wire from being caught in the assembly and maintenance.

  As described above, the domestic fuel cell cogeneration system of the present invention can uniformly cool the temperature inside the housing by guiding the cooling air from the lower portion of the housing to the space formed in the lower portion of the reformer. The lead wire can be easily protected by assembly maintenance.

1st invention is a fuel cell cogeneration system provided with the housing | casing and the reformer which becomes a hydrogen generator in the center part in the said housing | casing , Comprising : Above the said reformer, a fuel cell and the said fuel cell The water supply cooling water tank and the pure water supply related parts are provided on the left side of the reformer with a control device, an inverter device, and an ion exchange resin cylinder of the pure water supply device for the reforming reaction. To the right of the reformer is a fuel supply component including a raw material supply valve and booster pump to the reformer, exhaust heat recovery heat exchange to the hot water storage tank, condensed water from the exhaust heat, and condensation from the fuel cell. comprising a condensed water tank and the flow control equipment for storing water, the reformer and has a space formed between the bottom plate of the cabinet, opening at the bottom of the housing to direct air to the space parts are arranged, condensed water tank to the space at the bottom of the reformer From the control device on the left side to the right side of the reformer, and the water pipe from the left side to the ion exchange resin cylinder and the drain water circuit of the auto drain tank that condenses the reformed gas of the fuel cell and returns it to the reformer. The wiring to the fuel supply unit is arranged.

  Then, by guiding the cooling air from the lower part of the casing to the space formed in the lower part of the reformer, the temperature inside the casing can be cooled uniformly and lead wires can be protected by assembly maintenance. It is possible.

  In the second invention, in particular, two rails are attached to form a space in the lower part of the casing of the first invention, while the reformer is covered with a box-shaped frame, It is set as the structure put on.

  Then, when assembling or detaching the reformer, sliding on the two rails makes it extremely easy to handle the reformer of the weight part.

  In the third invention, in particular, a planar heater that generates heat when the outside air temperature becomes low is provided on the lower case plate of the reformer of the first invention.

  And by heating from the lower part of a housing with one planar heater, freeze prevention can be easily performed by the convection effect in the whole housing | casing, and assembly property and manufacturing cost can be suppressed on the large field.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view showing a configuration of a household fuel cell cogeneration system according to a first embodiment of the present invention, FIG. 2 is a right side view, and FIG. 3 is a left side view.

  1 to 3, reference numeral 1 denotes a fuel cell casing in which a reformer 2 serving as a hydrogen generator is disposed in the center of the inside. The reformer is housed in a box-shaped frame 2A. A cooling air intake opening 1 </ b> A is provided at a lower portion outside the housing 1. A humidifier 3 that humidifies air to the fuel cell is disposed above the reformer 2, and a fuel cell 4 is set above the humidifier 3, and a cooling water tank 5 for supplying water to the fuel cell and water for supplying pure water. Related parts 6 are provided. In addition, a fuel cell control device 7 and an inverter device 8 are provided on the left front surface of the reformer 2, and an ion exchange resin 9, an air supply blower 10 for the fuel cell 4, and a reformer 2 are provided behind the reformer 2. An air pump 11 is set. On the other hand, a desulfurizer 12 for removing impurities in the raw material gas, a raw material supply valve 13 to the reformer 2 and a booster pump 14 are set at the lower part of the casing 1 in front of the right side surface of the reformer. Yes. Behind the right side of the reformer 2 is an exhaust heat recovery heat exchanger 15 to the hot water storage tank, a condensate water tank 16 for accumulating the condensed water from the exhaust heat and the condensed water from the fuel cell, a flow rate controller 17 and the like. The hydrogen generated in the apparatus 2 is not supplied to the fuel cell 4 until the reaction in the reformer 2 is stabilized, but is recycled to the burner 18 of the reformer 2 as a reformed gas and reused. Become. For this purpose, a path switching three-way valve 19 is provided between the reformer 2 and the fuel cell 4. This reformed gas contains a large amount of water vapor, and an auto drain tank 20 for removing water vapor is set upstream of the burner incorporated in the reformer.

  The reformer 2 lower space 22 is formed by two rails 21 on the lower plate of the casing 1, and the reformer 2 is configured by a box-shaped frame, and is configured on the two rails 21. Yes.

  Further, in the lower space 22 of the reformer 2, the water pipe 23 from the condensed water tank 16 to the ion exchange resin cylinder 9 and the drain water of the auto drain tank 20 that condenses the reformed gas of the fuel cell and returns it to the reformer. In addition to the circuit 24, a wiring 25 from the control device on the left side to the fuel supply unit configured on the right side of the reformer is also arranged. Reference numeral 26 denotes a planar freezing prevention heater installed on the lower plate of the casing.

  The main operation and action of the home fuel cell cogeneration system configured as described above will be described below.

  First, methane gas, which is a raw material for hydrogen, is supplied, through a raw material supply valve 13, a desulfurizer 12 for removing impurities, a booster pump 14 for recovering the reduced pressure due to desulfurization, a flow control device 17 for controlling the raw material, and the like. Supplied to quality equipment. On the other hand, fuel is supplied to the burner 18 that indirectly heats the catalyst in the reformer 2 by the same control method. Pure water and air necessary for hydrogen generation are supplied to the reformer 2 to produce hydrogen necessary for the fuel cell 4. Next, the air supplied to the fuel cell 4 is sucked from the air supply blower 10 set at the lower part behind the control device 7 and supplied to the fuel cell 4 as hot and humid air by the humidifier 3 above the reformer 2. Is done. Since the reformer 2 and the fuel cell 4 require pure water, the water in the condensed water tank 16 is supplied as pure water through the ion exchange resin cylinder 9 and supplied by a water pump. The remaining air supplied to the fuel cell 4 is supplied to the exhaust heat recovery heat exchanger 15 to heat the water in the hot water storage circuit. On the other hand, in the fuel cell, in order to recover the heat generated by hydrogen and oxygen and the generated water, the circulation pump is driven to perform heat recovery by other heat exchange. These operations are achieved by controlling a large number of parts.

  As described above, in the present embodiment, the cooling air from the lower part of the casing is once guided to the space formed in the lower part of the reformer, so that the cooling air can be made uniform in the lower part of the reformer. By preventing local cooling and heating due to, many functional parts can be uniformly cooled and operated normally. In addition, the wiring from the control device is set in the space below the reformer, and the reformer is placed in a box-shaped frame and placed on two rails. It can also prevent hooking and biting.

  In addition, by heating the lower part of the housing with a single planar heater at low temperatures, it is possible to easily prevent freezing due to the convection effect in the entire housing, and it is possible to suppress assembly and manufacturing costs on the ground. is there.

  As described above, the household fuel cell cogeneration system according to the present invention has a space in the lower part of the casing, so that each part in the casing can be uniformly cooled, and can be uniformly heated by a planar heater at low temperatures. It is. Furthermore, by arranging the wiring in the space, the assemblability and maintainability are improved, and it can be applied to other power generation system.

The front view of the household fuel cell cogeneration system in Embodiment 1 of this invention Left side view of the system Right side view of the system Configuration diagram of conventional fuel cell power generation system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1A Opening 2 Reformer 2A Frame 3 Humidifier 4 Fuel cell 5 Cooling water tank 6 Water-related parts 7 Control device 8 Inverter device 9 Ion exchange resin cylinder 10 Air supply blower 11 Air pump 12 Desulfurizer 13 Raw material supply valve 14 Booster Pump 15 Waste Heat Recovery Heat Exchange 16 Condensed Water Tank 17 Flow Control Device 18 Burner 19 Three-way Valve 20 Auto Drain 21 Two Rails 22 Space 23 Water Circuit 24 Drain Water Circuit 25 Wiring 26 Planar Heater

Claims (3)

A housing, wherein the central portion of the housing to a fuel cell cogeneration system having a reformer as a hydrogen generator, a cooling water supply upward to the fuel cell fuel cell of the reformer a water-related parts of the water tank and pure water supply, to the left of the reformer is provided with an ion exchange resin column of pure water supply device for a control unit and an inverter unit and the reforming reaction, the reformer On the right side is a fuel supply component including a raw material supply valve and a booster pump to the reformer, a heat recovery heat exchanger to the hot water storage tank, a condensed water tank for collecting condensed water from the exhaust heat and condensed water from the fuel cell. and provided with a flow control equipment, the reformer and has a space formed between the bottom plate of the housing, the opening in the lower portion of the housing to direct the air is disposed in the space, the ion exchange from the condensed water tank to the space at the bottom of the reformer A water pipe to the oil cylinder and a drain water circuit of an auto drain tank that condenses the reformed gas of the fuel cell and returns it to the reformer, and a fuel configured on the right side of the reformer from the control device on the left side Fuel cell cogeneration system with wiring to the supply section. The space forms a space at two rails on the housing, wherein the reformer is provided with a frame of the box-shaped, two fuel cell cogeneration system according to claim 1, wherein constructed on rails. The reformer fuel cell cogeneration system according to claim 1, wherein the outside air temperature at the bottom of the housing plate is provided with a planar heater for heating to be a cold.

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