JP2011153758A - Refrigerator combined type fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator combined type fuel cell system capable of sufficiently effectively using exhaust heat in the entire system. <P>SOLUTION: The refrigerator combined type fuel cell system is formed by combining a fuel cell unit 1 having a reformer 112 and a fuel cell 10 with an adsorption type refrigerator 2. An adsorbent S of the adsorption type refrigerator 2 is heated by exhaust heat of the fuel cell 10, and at least one supply fluid of water, fuel and air (oxygen) supplied to the fuel cell unit 1 is heated by exhaust heat (condensation heat) generated in the adsorption type refrigerator 2. Thus, by using exhaust heat from the adsorption type refrigerator 2 as a heat source required for the fuel cell unit 1, heat quantity required for operation of the fuel cell 10 can be reduced. As a result, sufficient effective use of exhaust heat in the entire system is enabled. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigeration composite fuel in which a fuel cell unit including a fuel cell that generates electrical energy by an electrochemical reaction between hydrogen and oxygen and a heat-driven refrigerator that uses exhaust heat of the fuel cell unit during operation are combined. The present invention relates to a battery system.

  Conventionally, a fuel cell unit reforms a fuel such as kerosene or LPG to generate a fuel gas containing hydrogen, and generates electric energy by an electrochemical reaction between the fuel gas and an oxidant gas (air). And a fuel cell to be generated.

  In the fuel cell, fuel gas (hydrogen) is supplied to the fuel electrode side (anode side), and oxidant gas (air) is supplied to the air electrode side (cathode side). The reaction gas supplied to the fuel cell is used for power generation in the fuel cell and then discharged as an exhaust gas containing unreacted gas. The unreacted gas is used by burning the unreacted gas discharged from the fuel cell and using the heat generated by the combustion (exhaust heat of the fuel cell) as a heat source for the reforming reaction of the reformer. There is a fuel cell unit (a so-called internal reforming fuel cell unit).

  Here, in a system in which a fuel cell unit and an absorption chiller are combined (absorption refrigeration combined fuel cell system), a configuration in which exhaust heat of the fuel cell is used as a heat source of the absorption chiller is known. (For example, refer to Patent Document 1). Specifically, in Patent Document 1, the exhaust heat of the fuel cell is used as a heat source for a reforming reaction of a reformer and a heat source for heating a regenerator of an absorption refrigerator.

JP 2006-73416 A

  Incidentally, as in Patent Document 1, in a refrigerator combined fuel cell system in which a fuel cell unit and a refrigerator (heat-driven refrigerator) that is driven by using the exhaust heat of the fuel cell as a heat source, the exhaust on the fuel cell unit side is used. Although effective use of heat is intended, the exhaust heat on the refrigerator side is not used effectively, and it is insufficient for effective use of exhaust heat in the entire system.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a refrigerator combined fuel cell system capable of sufficiently effectively utilizing exhaust heat in the entire system.

  In order to achieve the above object, according to the first aspect of the present invention, a reformer (112) that reforms a fluid to be reformed by heating to produce a fuel gas containing at least hydrogen, and a fuel gas A fuel cell unit (1) having a fuel cell (10) that outputs electric energy by electrochemically reacting the oxidant gas with an oxidant gas, and evaporating the refrigerant by capturing the refrigerant in a capture material to exert a refrigerating capacity And a heat-driven refrigerating machine that dissipates the refrigerant trapped in the trapping material when heated and dissipates the heat of condensation generated when the dissociated refrigerant is condensed. The capture material heating means (24) for heating the capture material with the exhaust heat of the fuel cell (10) and the fuel cell unit (1) such as a reforming target fluid and an oxidant gas. And a first supply fluid heating means (22, 24, 162 to 164) for heating at least one of the supply fluids to be heated by condensation heat generated in the heat-driven refrigerator. Type fuel cell system.

  As described above, in the present invention, the exhaust heat of the fuel cell (10) is effectively used for heating the capture material of the heat-driven refrigerator, and the condensation heat generated when the refrigerant is condensed in the heat-driven refrigerator. It is configured to be effectively used for heating the supply fluid supplied to the fuel cell unit (1). In other words, the exhaust heat of the fuel cell (10) and the heat-driven refrigerator is used effectively between the fuel cell unit (1) and the heat-driven refrigerator (2).

  According to this, since the amount of heat required for the operation of the fuel cell (10) can be reduced by using the exhaust heat of the heat-driven refrigerator in the fuel cell unit (1), the entire system It is possible to make full use of the exhaust heat.

  Further, as in the invention described in claim 2, in the refrigerator combined fuel cell system according to claim 1, the second supply fluid heating means (15) for heating the supply fluid by the exhaust heat of the fuel cell (10). ), It is possible to effectively use the exhaust heat in the entire system more effectively.

  According to a third aspect of the present invention, in the refrigerator combined fuel cell system according to the first or second aspect, the first supply fluid heating means (22, 24, 162 to 164) has a supply fluid and a condensation heat. The supply fluid is heated by exchanging heat with the heating medium heated by.

  According to this, it is possible to heat each of the fluid to be reformed and the oxidant gas, which are supply fluids, via the heating medium heated by the exhaust heat of the heat-driven refrigerator.

  Further, as in the invention according to claim 4, in the refrigerator combined fuel cell system according to any one of claims 1 to 3, the heat-driven refrigerator is used as a capturing material to adsorb the refrigerant. An adsorbent (S) that desorbs the refrigerant adsorbed by heating, an adsorber (21) in which the adsorbent (S) is enclosed, and a condensation for condensing the refrigerant desorbed from the adsorbent (S) In the first supply fluid heating means (22, 24, 162 to 164), at least one of the supply fluids is cooled by the condenser (22). It can be set as the structure heated with the heat of condensation at the time of condensing.

  According to a fifth aspect of the present invention, in the refrigerator combined fuel cell system according to the fourth aspect, the first supply fluid heating means (22, 24, 162 to 164) has at least one of the supply fluids. Is heated by adsorption heat generated when the refrigerant is adsorbed by the adsorbent (S).

  According to this, the supply supplied to the fuel cell unit (1) by both the condensation heat generated in the condenser (22) and the condensation heat (adsorption heat) generated when the refrigerant is adsorbed by the adsorbent (S). Since the fluid can be heated, the amount of exhaust heat of the fuel cell unit (1) used for heating the supply fluid can be more effectively reduced.

  According to a sixth aspect of the present invention, in the refrigerator combined fuel cell system according to the fifth aspect, the first supply fluid heating means (22, 24, 162 to 164) condenses in the condenser (22). The modification target fluid heated by heat is configured to be heated by heat of adsorption in the adsorbent (S).

  According to this, the temperature of the refrigerant | coolant in a condenser (22) is lowered | hung by heating the fluid for reforming with the condensation heat which arises in a condenser (22) previously, and it can condense efficiently. it can. In this case, first, compared with the configuration in which the fluid to be reformed is heated by condensation heat (adsorption heat) generated when the refrigerant is adsorbed by the adsorbent (S), the heat radiation area for securing the same heat radiation amount. Therefore, it is possible to reduce the size of the condenser (22).

  Here, when the reforming target fluid is heated by the condensation heat generated when the refrigerant is adsorbed by the adsorbent (S), that is, when the adsorbent (S) is cooled by the low temperature reforming target fluid. If the temperature of the fluid to be reformed is too low, the adsorbing refrigerant condenses at the opening of the adsorbing hole of the adsorbing material (S) and closes the adsorbing hole, thereby adsorbing the adsorbing material (S). May decrease.

  On the other hand, in the invention according to claim 6, since the adsorbent (S) in the adsorption step is cooled by the reforming target fluid heated in the condenser (22), the adsorption in the adsorbent (S) is performed. It is possible to avoid condensing the adsorbing hole by condensing at the opening of the hole, and it is possible to suppress a decrease in the adsorbing amount in the adsorbent (S).

  Further, when the adsorbent (S) is cooled by the reforming target fluid heated by the condenser (22), the adsorbent (S) is cooled rather than the adsorbent (S) is cooled by the low temperature reforming target fluid. S) Since the saturated vapor pressure in the vicinity can be increased, it is possible to increase the adsorption speed of the adsorbent (S) and efficiently adsorb it.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

1 is an overall configuration diagram of a refrigerator combined fuel cell system according to a first embodiment. FIG. It is a whole block diagram of the refrigerator combined fuel cell system which concerns on 2nd Embodiment. It is a whole block diagram of the refrigerator combined fuel cell system which concerns on 3rd Embodiment. It is a whole block diagram of the refrigerator combined fuel cell system which concerns on 4th Embodiment. It is a whole block diagram of the refrigerator combined fuel cell system which concerns on 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall configuration diagram of a refrigerator combined fuel cell system according to a first embodiment.

  This refrigerating machine combined fuel cell system includes a fuel cell unit 1 and a fuel cell unit 1 including a fuel cell 10 that generates electric power using an electrochemical reaction between a fuel gas (hydrogen, etc.) and an oxidant gas (oxygen). This is a composite of the adsorption refrigeration machine 2 that is driven by utilizing the exhaust heat.

  First, the fuel cell unit 1 will be described. The fuel cell unit 1 generates electric energy by electrochemically reacting a fuel gas containing hydrogen (and carbon monoxide) generated by steam reforming the fuel and oxygen (oxidant gas) contained in the air. A fuel cell 10 is provided. The DC power generated in the fuel cell 10 is converted into an AC current via the inverter 3 and supplied to various electric loads (not shown).

  The fuel cell 10 according to the present embodiment is a solid in which a plurality of fuel cells each composed of an electrolyte (solid oxide), a fuel electrode 10a, an air electrode 10b, and the like are joined via an interconnector (a joining member that joins cells). An electrolyte fuel cell (SOFC) is used. The solid oxide fuel cell is a high-temperature fuel cell whose operating temperature is set to 700 ° C to 1000 ° C. For convenience of explanation, only a single fuel electrode 10a and an air electrode 10b are shown in FIG.

  The fuel cell 10 is supplied with hydrocarbon-based fuel (including fuel gas containing water vapor) and air as supply fluids. Specifically, a fuel supply path 11 for supplying fuel and fuel gas is connected to the fuel electrode 10a side of the fuel cell 10, and air (oxidant gas) is connected to the air electrode 10b side of the fuel cell 10. Is connected to the air supply path 12.

  A vaporizer 111 and a reformer 112 are provided in the fuel supply path 11 in order from the upstream side of the fuel flow. The vaporizer 111 heats and vaporizes the water supplied through the water supply path 13, heats and vaporizes the fuel, mixes the vaporized water (water vapor) and the fuel, and contains the water vapor. It is a vaporization means which produces | generates. The vaporizer 111 is configured to use high heat of combustion exhaust gas generated by the combustor 14 described later as a heat source, and to heat fuel and water by the heat source.

  In addition, when employ | adopting gaseous fuels, such as LPG, as a fuel, water vapor | steam should be produced | generated by the vaporizer | carburetor 111 and gaseous fuel should just be mixed. Further, when the steam can be generated regardless of the vaporizer 111, the vaporizer 111 may be omitted and the gaseous fuel and the steam may be mixed in the reformer 112.

  The reformer 112 reforms hydrogen and (carbon monoxide) by steam reforming reaction (catalytic reaction) by heating the mixed gas generated in the vaporizer 111 to a high temperature (about 800 ° C.). The fuel gas containing is produced | generated. The fuel gas reformed by the reformer 112 is introduced to the fuel electrode 10 a side of the fuel cell 10. The reformer 112 is configured to use high heat of combustion exhaust gas generated by the combustor 14 described later as a heat source, and to heat the mixed gas by the heat source.

  Here, the mixed gas introduced into the reformer 112 is a fuel gas containing water vapor, and the fuel and water introduced into the vaporizer 111 correspond to the reforming target fluid of the present invention.

  The air supply path 12 is provided with an air preheater 121 for heating the air introduced into the air electrode 10b. The air preheater 121 heats the air introduced into the air electrode 10 b, so that the temperature of the air (oxidant gas) introduced into the air electrode 10 b and the high-temperature fuel gas introduced into the fuel electrode 10 a of the fuel cell 10. This is an air preheating means for reducing the difference and improving the efficiency of the electrochemical reaction in the fuel cell 10.

  Although not shown, each of the fuel supply path 11 and the air supply path 12 has an adjustment valve for adjusting the supply amount of the reformed gas supplied to the fuel electrode 10a and air supplied to the air electrode 10b (oxidant gas). ) And an adjustment valve for adjusting the supply amount.

  Further, the fuel cell 10 is adjacently disposed with a combustor 14 that burns unreacted hydrogen contained in the fuel electrode side exhaust gas and unreacted air contained in the air electrode side exhaust gas to generate high-temperature combustion exhaust gas, The combustor 14 functions as a heat source for keeping the fuel cell 10 warm. Note that the heat insulation of the fuel cell 10 is not limited to the combustor 14, and a heat source introduced from the outside can be used.

  A combustion exhaust gas path 15 for discharging high-temperature combustion exhaust gas generated in the combustor 14 to the outside is connected to the combustor 14. In order to effectively use the high heat (exhaust heat) of the combustion exhaust gas passing through the interior of the combustion exhaust gas path 15, the reformer 112, the vaporizer 111, the air preheater 121, and the exhaust heat recovery heat exchanger are sequentially arranged from the upstream side. It is comprised so that it may pass through the heating object apparatus like 31.

  Thereby, high heat of the combustion exhaust gas generated by the combustor 14 is transferred to each of the heating target devices 111, 112, 121, and 31 via the combustion exhaust gas path 15. That is, a supply fluid such as fuel gas and air supplied to the fuel cell 10 via the combustion exhaust gas passage 15 is heated. For this reason, the combustion exhaust gas path 15 in the present embodiment constitutes the second supply fluid heating means of the present invention.

  Here, the exhaust heat recovery heat exchanger 31 is a heat exchanger that generates hot water by exchanging heat between the flue gas passing through the flue gas passage 15 and the water in the hot water passage 30. In addition, an electric water pump 32 is disposed in the hot water path 30 on the upstream side of the water flow of the exhaust heat recovery heat exchanger 31. When the water pump 32 is activated, water flows in the hot water path 30. Circulate.

  Next, the adsorption refrigerator 2 will be described. The adsorption refrigeration machine 2 evaporates the refrigerant by causing the adsorbent S to adsorb the refrigerant in the gas phase state to exert the refrigerating capacity, and desorbs the refrigerant adsorbed from the adsorbent S by being heated. And a heat-driven refrigerator that dissipates the heat of condensation that is generated when the desorbed refrigerant is condensed.

  The adsorption refrigeration machine 2 according to the present embodiment includes two adsorbers 21, a condenser 22, an evaporator 23, and the like. Hereinafter, for convenience of explanation, the adsorber shown on the left side in FIG. 1 among the two adsorbers 21 is referred to as a first adsorber 21a, and the adsorber shown on the right side in FIG. 1 is referred to as a second adsorber 21b.

  The first adsorber 21a accommodates (encloses) the first adsorbing core 24a in a heat insulating container whose inside is substantially vacuum, and a refrigerant (water is used in the present embodiment) around the first adsorbing core 24a. It is configured so that it can be distributed. The first adsorption core 24a is a heat exchanger that exchanges heat between the adsorbent S and the heating heat medium that heats the adsorbent S or the cooling heat medium that cools the adsorbent S, on the surface of the heat exchanger. The adsorbent S is joined or contacted.

  The basic configuration of the second adsorber 21b is the same as that of the first adsorber 21a. Therefore, the second adsorption core 24b having the same configuration as the first adsorption core 24a is accommodated (enclosed) in the heat insulating container of the second adsorber 21b. Hereinafter, when the first adsorption core 24a and the second adsorption core 24b are collectively referred to, they are also simply referred to as the adsorption core 24.

  The adsorbent S constitutes a trapping material that captures (adsorbs) the adsorption refrigerant in the gas phase and dissociates (desorbs) the adsorbed refrigerant adsorbed by being heated. In the present embodiment, as the adsorbent S, for example, a skeleton made of aluminum oxide, phosphoric acid, or silicic acid oxide, zeolite, silica gel, activated alumina, or activated carbon can be employed.

  Here, the first and second adsorption cores 24 a and 24 b are configured to be able to supply a cooling heat medium, and are configured to be able to supply hot water as a heating heat medium via the hot water path 30. . In the present embodiment, the hot water generated in the above-described exhaust heat recovery heat exchanger 31 is used as the heating heat medium, and the vaporizer 111 of the fuel cell unit 1 that is one of the reforming target fluids as the cooling heat medium. The water supplied to is used. For this reason, the heat medium path is configured by the hot water path 30 through which the hot water that is the heating heat medium flows and the water supply path 13 through which the water that is the cooling heat medium flows.

  Specifically, in the hot water path 30 and the water supply path 13 constituting the heat medium path, the first adsorbing core 24a and the second adsorbing core 24a are arranged on the upstream side and the downstream side of the heat medium flow of the first and second adsorbing cores 24a and 24b. First and second four-way valves 25a and 25b for switching the flow of the heat medium supplied to the adsorption core 24b are arranged.

  When each of the first and second four-way valves 25a and 25b is set to the solid line position in FIG. 1, the first adsorption core 24a and the water supply path 13 are connected, and the second adsorption core 24b and the hot water path 30 are connected. Is connected. Thereby, the water flowing through the water supply path 13 is directly supplied to the inside of the first adsorption core 24a, the adsorbent S joined to the surface of the first adsorption core 24a is cooled, and the hot water flowing through the hot water path 30 is The adsorbent S supplied to the inside of the second adsorption core 24b and bonded to the outer surface of the second adsorption core 24b is heated.

  When each of the first and second four-way valves 25a and 25b is set at a broken line position, the second adsorption core 24b and the water supply path 13 are connected, and the first adsorption core 24a and the hot water path 30 are connected. Connected. Thereby, the cold water flowing through the water supply path 13 is directly supplied to the inside of the second adsorption core 24 a to cool the adsorbent S joined to the outer surface of the second adsorption core 24 a and the hot water flowing through the hot water path 30. Is supplied to the inside of the first adsorption core 24a and the adsorbent S bonded to the outer surface of the first adsorption core 24a is heated.

  As described above, the first and second adsorption cores 24a and 24b of the present embodiment are configured to heat the adsorbent S joined to the adsorption core 24 by supplying hot water flowing through the hot water path 30. Therefore, the adsorption core 24 to which hot water is supplied among the first and second adsorption cores 24a and 24b constitutes the capturing material heating means of the present invention.

  The condenser 22 includes a gas-phase adsorption refrigerant (hereinafter referred to as desorption refrigerant) desorbed from the adsorbent S of the first and second adsorption cores 24a and 24b and air flowing through the air supply path 12 (air preheating). This is a heat exchanger for condensation that condenses the desorbed refrigerant by exchanging heat with air before being introduced into the vessel 121.

  Here, the air before being introduced into the air preheater 121 is heated by the condensation heat when condensing the desorbed refrigerant in the condenser 22, and the water flowing through the water supply path 13 is the first and second adsorption cores 24a. , 24 b is heated by condensation heat (adsorption heat) generated when the adsorbent S adsorbs the refrigerant. Therefore, the condenser 22 and the adsorption core 24 to which cold water is supplied among the first and second adsorption cores 24a and 24b in the present embodiment constitute the first supply fluid heating means of the present invention.

  The evaporator 23 evaporates the adsorption refrigerant by exchanging heat between the liquid-phase adsorption refrigerant and the cooling target fluid introduced from the outside, and the outer surfaces of the first and second adsorption cores 24a and 24b. It is an evaporative heat exchanger that generates a gas-phase adsorption refrigerant (hereinafter, referred to as an adsorption refrigerant) that is adsorbed by the adsorbent S bonded to the. In addition, the evaporator 23 exhibits a refrigerating capability by evaporating the refrigerant for adsorption, and cools the cooling target fluid introduced from the outside. The fluid to be cooled that has been cooled by the evaporator 23 can be used for cooling in a room or the like.

  The first adsorber 21 a, the condenser 22, and the evaporator 23 described above are connected by a first refrigerant circuit 26, and the second adsorber 21 b, the condenser 22, and the evaporator 23 are connected by a second refrigerant circuit 27. Has been.

  Each of the refrigerant circuits 26 and 27 is a check valve that only allows desorbed refrigerant to flow from the adsorbers 21a and 21b to the condenser 22 between the condenser 22 and the adsorbers 21a and 21b. First and second condensing water vapor valves 26a and 27a functioning as Each refrigerant circuit 26, 27 has a check valve that only allows the adsorbed refrigerant to flow from the adsorbers 21a, 21b to the evaporator 23 between the evaporator 23 and the adsorbers 21a, 21b. The functioning first and second evaporation steam valves 26b and 27b are arranged. The operation of each water vapor valve 26a, 26b, 27a, 27b is controlled by a control device (not shown).

  Further, the condenser 22 and the evaporator 23 are connected by a refrigerant return circuit 28 that returns the adsorption refrigerant condensed in the condenser 22 to the evaporator 23. The refrigerant return circuit 28 is provided with a refrigerant return valve 29 that is an electromagnetic valve that opens and closes the refrigerant return circuit 28.

  The operation of the refrigerant return valve 29 is controlled by a control device (not shown). When the control device opens and closes the refrigerant return valve 29 at predetermined time intervals, the adsorption refrigerant condensed in the condenser 22 evaporates. Returned to the vessel 23.

  Next, the operation of the refrigerator combined fuel cell system of the present embodiment having the above configuration will be described.

  First, in the fuel cell unit 1, in the fuel cell 10, hydrogen (and carbon monoxide) in the fuel gas introduced into the fuel electrode 10a and oxygen in the air (oxidant gas) introduced into the air electrode 10b Electricity is generated by the electrochemical reaction. Then, the fuel electrode side exhaust gas discharged from the fuel electrode 10 a of the fuel cell 10 and the air electrode side exhaust gas discharged from the air electrode 10 b are burned in the combustor 14. The high-temperature combustion exhaust gas generated in the combustor 14 is discharged through the combustion exhaust gas path 15.

  Here, since the combustion exhaust gas path 15 passes through the reformer 112, the vaporizer 111, the air preheater 121, and the exhaust heat recovery heat exchanger 31, the exhaust heat of the combustion exhaust gas is converted into the reformer 112 and the vaporization. Is effectively used in the heat exchanger 111, the air preheater 121, and the exhaust heat recovery heat exchanger 31. The hot water heated by the exhaust heat recovery heat exchanger 31 by the exhaust heat of the combustion exhaust gas is supplied to the adsorption core 24 of the adsorption refrigeration machine 2 through the hot water path 30 and the adsorption refrigerant is removed from the adsorbent S. It is used as a heat source during the desorption process.

  Next, the adsorption refrigeration machine 2 uses the first adsorber 21a as an adsorption process in which the refrigerant is adsorbed by the internal adsorbent S and the second adsorber 21b as the internal adsorbent S when the fuel cell unit 1 is operated. A first operation mode in which a desorption process for desorbing the adsorbed refrigerant and a second operation mode in which the first adsorber 21a is an adsorption process and the second adsorber 21b is a desorption process are performed at predetermined time intervals. Switch and operate.

  Specifically, in the first operation mode, the first and second four-way valves 25a and 25b are set to the solid line positions in FIG. Then, the first condensing water vapor valve 26a is closed, the second condensing water vapor valve 27a is opened, the first evaporating water vapor valve 26b is opened, and the second evaporating water vapor valve 27b is closed.

  In this state, the water flowing through the water supply path 13 flows in the order of the first four-way valve 25a (solid line) → the first adsorption core 24a → the second four-way valve 25b (solid line) → the vaporizer 111 (the water supply in FIG. 1). (See thick solid arrow near path 13).

  Thereby, the adsorption refrigerant evaporated in the evaporator 23 flows into the first adsorber 21a through the first refrigerant circuit 26 and is adsorbed by the adsorbent S in the first adsorber 21a. And the adsorbent S is cooled by the water supplied to the 1st adsorption | suction core 24a from the water supply path 13, and the temperature of the adsorbent S is maintained about the atmospheric temperature outside an adsorber.

  At this time, the water flowing in the water supply path 13 is heated by the condensation heat (adsorption heat) generated when the adsorbent S adsorbs the adsorbed refrigerant, and the temperature of the water increases. It is introduced into the vaporizer 111.

  Further, the hot water flowing through the hot water path 30 is supplied from the water pump 32 → the exhaust heat recovery heat exchanger 31 → the first four-way valve 25a (solid line) → the second adsorption core 24b → the second four-way valve 25b (solid line) → the water pump 32. It flows in order (see white solid arrows in the vicinity of the hot water path 30 in FIG. 1).

  Thereby, in the 2nd adsorption device 21b, since the warm water of warm water path 30 is supplied to the 2nd adsorption core 24b, adsorbent S joined to the outer surface of the 2nd adsorption core 24b is heated, and adsorbent S Desorb adsorbed refrigerant. The desorbed refrigerant desorbed from the adsorbent S in the second adsorber 21b flows into the condenser 22 via the second refrigerant circuit 27, and the air (air) flowing through the air supply path 12 in the condenser 22 The air is cooled and condensed by the air before being introduced into the preheater 121.

  At this time, the air flowing through the air supply path 12 is heated by the condensation heat that is reduced when the desorbed refrigerant is condensed in the condenser 22, and the heated air is introduced into the air preheater 121. After being heated by the high temperature of the combustion exhaust gas, it is introduced into the air electrode 10b.

  On the other hand, in the second operation mode, the first and second four-way valves 25a and 25b are set to the broken line positions in FIG. 1 (broken line positions in FIG. 1). Then, the first condensing water vapor valve 26a is opened, the second condensing water vapor valve 27a is closed, the first evaporating water vapor valve 26b is closed, and the second evaporating water vapor valve 27b is opened.

  In this state, the water flowing through the water supply path 13 flows in the order of the first four-way valve 25a (broken line) → the second adsorption core 24b → the second four-way valve 25b (broken line) → the vaporizer 111 (the water supply in FIG. 1). (See thick broken line arrow in the vicinity of the path 13).

  Thereby, the adsorption refrigerant evaporated in the evaporator 23 flows into the second adsorber 21b via the second refrigerant circuit 27 and is adsorbed by the adsorbent S in the second adsorber 21b. Then, the adsorbent S is cooled by the cold water supplied from the water supply path 13 to the second adsorption core 24b, and the temperature of the adsorbent S is maintained at about the atmospheric temperature outside the adsorber.

  At this time, the water flowing in the water supply path 13 is heated and heated by the condensation heat generated when the adsorbent S adsorbs the adsorbed refrigerant, and the heated water is introduced into the vaporizer 111.

  Further, the water flowing through the hot water path 30 flows from the water pump 32 → the exhaust heat recovery heat exchanger 31 → the first four-way valve 25 a (broken line) → the first adsorption core 24 a → the second four-way valve 25 b (broken line) → the water pump 32. It flows in order (see white dashed arrow in the vicinity of the hot water path 30 in FIG. 1).

  Thereby, in the 1st adsorption device 21a, since the warm water of warm water path 30 is supplied to the 1st adsorption core 24a, adsorption material S joined to the outer surface of the 1st adsorption core 24a is heated, and adsorption material S is changed. Desorb adsorbed refrigerant. The desorbed refrigerant desorbed from the adsorbent S in the first adsorber 21 a flows into the condenser 22 through the first refrigerant circuit 26, and the air (air) flowing through the air supply path 12 in the condenser 22. The air is cooled and condensed by the air before being introduced into the preheater 121.

  At this time, the air flowing through the air supply path 12 is heated by the condensation heat generated when condensing the desorbed refrigerant in the condenser 22, and the heated air is introduced into the air preheater 121. After being heated by the high temperature of the combustion exhaust gas, it is introduced into the air electrode 10b.

  According to the configuration of the present embodiment described above, the flue gas path 15 for discharging the high-temperature flue gas passes through the reformer 112, the vaporizer 111, the air preheater 121, and the exhaust heat recovery heat exchanger 31. It is composed. Thereby, the heat of the combustion exhaust gas, which is the exhaust heat from the fuel cell unit 1, is effectively used as a heat source for heating the various heating target devices 111, 112, 121 and the exhaust heat recovery heat exchanger 31 of the fuel cell unit 1. be able to.

  Furthermore, in this embodiment, water flowing through the water supply path 13 (water before being introduced into the vaporizer 111) is used as a cooling heat medium for cooling the adsorbent S during the adsorption step, and air flowing through the air supply path 12 ( The desorption refrigerant of the condenser 22 is cooled by air before being introduced into the air preheater 121.

  Therefore, the water introduced into the vaporizer 111 can be heated by the condensation heat (adsorption heat) generated in the adsorbent S during the adsorption step, and the air introduced into the air preheater 121 by the condensation heat in the condenser 22. Can be heated. That is, the heat source and the air for heating the water introduced into the vaporizer 111 of the fuel cell unit 1 from the exhaust heat of the adsorption refrigerator 2 such as the condensation heat generated in the adsorbent S during the adsorption process and the condensation heat in the condenser 22. It can be effectively used as a heat source for heating the air introduced into the preheater 121.

  According to this, the amount of heat required for the operation of the fuel cell unit 1 fuel cell 10 can be reduced from the exhaust heat of the adsorption refrigeration machine 2. Furthermore, since the heat quantity of the exhaust heat of the fuel cell unit 1 that can be used in the adsorption refrigerator 2 can be increased, the capacity of the adsorption refrigerator 2 can be improved, and the exhaust heat of the adsorption refrigerator 2 can be improved. Can be used effectively.

  Therefore, according to the configuration of the present embodiment, in the refrigerator combined fuel cell system in which the fuel cell unit 1 and the adsorption refrigerator 2 are combined, the exhaust heat in the entire system can be sufficiently effectively used. .

  In the present embodiment, the water flowing through the water supply path 13 of the fuel cell unit 1 is supplied to the adsorption core 24 and the adsorbent S in the adsorber 21 of the adsorption refrigerator 2 is cooled. The supply means (for example, pump) which supplies the heat carrier for cooling as a structure of the type refrigerator 2 can be omitted.

  Further, since the air flowing through the air supply path 12 of the fuel cell unit 1 is configured to cool the desorbed refrigerant in the condenser 22 of the adsorption refrigeration machine 2, the condenser 22 is cooled as a configuration of the adsorption refrigeration machine 2. Means (for example, a blower) can be omitted.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. Here, FIG. 2 is an overall configuration diagram of the refrigerator combined fuel cell system according to the second embodiment.

  In the first embodiment, heat is exchanged between the air flowing through the air supply path 12 and the desorbed refrigerant in the condenser 22, whereas in this embodiment, vaporization, which is one of the reforming target fluids. The water before being introduced into the vessel 111 and the desorbed refrigerant in the condenser 22 are configured to exchange heat.

  The water supply path 13 of the present embodiment includes a first path 13 a that passes through the adsorber 21 and a second path 13 b that passes through the condenser 22. Specifically, the water supply path 13 branches into two paths such as a first path 13a and a second path 13b on the upstream side of the first four-way valve 25a, and the two branched paths are vaporized with the second four-way valve 25b. Between the vessels 111.

  Of the water supply path 13, the first path 13a is connected in order from the upstream side to the branching section 13c, the first four-way valve 25a, the adsorber 21, the second four-way valve 25b, and the merging section 13d. And the water which flows through the 1st path | route 13a is heated by the heat of condensation of the adsorbent S at the time of the adsorption | suction process of the adsorption | suction type refrigerator 2 similarly to 1st Embodiment.

  On the other hand, the second path 13b of the water supply path 13 is connected to the branch part 13c, the condenser 22, and the junction part 13d in order from the upstream side. And the water which flows through the 2nd path | route 13b is made to act as cooling water which cools the condenser 22. FIG. For this reason, the water flowing through the second path 13 b is heated by the condensation heat generated when the desorbed refrigerant is condensed in the condenser 22. In addition, the condenser 22 of this embodiment is comprised with the water-water heat exchanger so that heat-exchange of the refrigerant | coolant for adsorption and liquid (water) is possible.

  In the junction 13 d of the water supply path 13, the water heated by the adsorption core 24 and the water heated by the condenser 22 are mixed. And the water mixed in the junction 13d is introduced into the vaporizer 111.

  According to the configuration of the present embodiment, the water introduced into the vaporizer 111 by the condensation heat (adsorption heat) generated in the adsorbent S during the adsorption process and the condensation heat generated when the desorbed refrigerant is condensed in the condenser 22. Can be heated. That is, the exhaust heat of the adsorption refrigerator 1 such as the condensation heat generated in the adsorbent S during the adsorption process and the condensation heat in the condenser 22 is effective as a heat source for heating water introduced into the vaporizer 111 of the fuel cell unit 1. Can be used.

  Thereby, the usage-amount (heat amount) of the exhaust heat of the fuel cell unit 1 in the vaporizer 111 can be reduced. Along with this, the amount of heat of exhaust heat of the fuel cell unit 1 that can be used in the adsorption refrigeration machine 2 increases, so that the capacity of the adsorption refrigeration machine 2 can be improved, and the exhaust heat of the adsorption refrigeration machine 2 can be reduced. It can be used effectively.

  Here, when the flow rate of air used in the fuel cell 10 is small and the amount of water used in the vaporizer 111 is large, the amount of exhaust heat used by the fuel cell unit 1 in the air preheater 121 is small. However, the amount of exhaust heat used by the fuel cell unit 1 in the vaporizer 111 increases.

  In this case, as in the configuration of the present embodiment, the water before being introduced by the vaporizer 111 is heated by the condensation heat in the condenser 22 in addition to the condensation heat generated in the adsorbent S during the adsorption step. By doing so, the amount of exhaust heat used by the fuel cell unit 1 in the vaporizer 111 can be effectively reduced. For this reason, the configuration of the present embodiment is particularly effective when the flow rate of air used in the fuel cell 10 of the fuel cell unit 1 is small and the amount of water used in the vaporizer 111 is large.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. Here, FIG. 3 is an overall configuration diagram of the refrigerator combined fuel cell system according to the third embodiment.

  In the second embodiment described above, the water supply path 13 is branched into a first path 13a passing through the adsorber 21 and a second path 13b passing through the condenser 22, and the paths 13a and 13b are branched in the water supply path 13. It is set as the structure merged in the upstream of the vaporizer | carburetor 111. FIG. On the other hand, in this embodiment, without branching the water supply path 13 into two paths, the condenser 22 is routed on the upstream side of the water flow in the water supply path 13 and the downstream side is subjected to the adsorption step. The adsorption core 24 is used as a configuration.

  Specifically, the water supply path 13 of this embodiment is connected in order from the upstream side to the condenser 22, the first four-way valve 25a, the adsorption core 24 at the time of the adsorption process, the second four-way valve 25b, and the vaporizer 111. ing. For this reason, the water flowing through the water supply path 13 is heated by the condensation heat generated by the condensation of the desorbed refrigerant in the condenser 22 and then further by the condensation heat (adsorption heat) generated in the adsorbent S during the adsorption step. Heated.

  According to the configuration of the present embodiment, the heat is introduced into the vaporizer 111 by the condensation heat (adsorption heat) generated in the adsorbent S during the adsorption process and the condensation heat generated when the desorbed refrigerant is condensed in the condenser 22. Water can be heated. Therefore, in the configuration of the present embodiment, the same effects as those of the second embodiment can be achieved.

  Here, in this embodiment, although it is set as the structure which passes the water which flows through the water supply path 13 in order of the condenser 22-> adsorption core at the time of an adsorption process, it is the structure which passes through the order of the adsorption core-> condenser 22 at the time of an adsorption process. It is good.

  However, when the configuration is such that the water flowing through the water supply path 13 passes through the condenser 22 in the order of the adsorption core 24 at the time of the adsorption process, compared with the configuration in which the water passes through the adsorption core 24 at the time of the adsorption process → the condenser 22 in this order. There are various advantages as follows.

  For example, the temperature of the desorbed refrigerant in the condenser 22 is obtained by heating water (water before being introduced into the vaporizer 111), which is one of the reforming target fluids, with the heat of condensation generated in the condenser 22 first. Can be efficiently condensed. In this case, first, compared to a configuration in which water is heated by condensation heat (adsorption heat) generated when the refrigerant is adsorbed by the adsorbent S during the adsorption process, the heat radiation area for securing the same heat radiation amount is reduced. Therefore, the condenser 22 can be downsized.

  Here, when the water flowing through the water supply path 13 is heated by the condensation heat generated in the adsorbent S during the adsorption process, that is, when the adsorbent S is cooled with low-temperature water, the water flows through the water supply path 13. If the temperature of the water is too low, the adsorbed refrigerant may condense at the opening of the adsorbing hole of the adsorbing material S and close the adsorbing hole, so that the amount of adsorption on the adsorbing material S may be reduced.

  For this reason, the water once heated by the condenser 22 is supplied to the adsorption core 24, and the adsorbent S at the time of the adsorption process is cooled by the water heated by the condenser 22, so that the adsorption by the adsorbent S is performed. It is possible to avoid condensing the adsorbing hole by condensing at the opening of the hole, and to suppress a decrease in the adsorbing amount in the adsorbent S.

  Furthermore, when cooling the adsorbent S at the time of the adsorption process with water heated by the condenser 22 (water flowing through the water supply path 13), the adsorbent is less than cooling the adsorbent S with low-temperature water. Since the saturated vapor pressure around S can be increased, it is possible to increase the adsorption speed of the adsorbent S and efficiently adsorb it.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. Here, FIG. 4 is an overall configuration diagram of the refrigerator combined fuel cell system according to the fourth embodiment.

  In the first embodiment, the air flowing through the air supply path 12 and the desorbed refrigerant in the condenser 22 are configured to exchange heat, and in the second and third embodiments, the water and the condensation before being introduced into the vaporizer 111 are condensed. The desorption refrigerant in the vessel 22 is configured to exchange heat.

  On the other hand, in this embodiment, heat exchange is performed between the fuel (fuel before being introduced into the vaporizer 111) flowing through the fuel supply path 11 that is one of the reforming target fluids and the desorbed refrigerant in the condenser 22. The configuration is to let Specifically, the fuel supply path 11 of this embodiment is connected in order from the upstream side to the condenser 22 → the vaporizer 111 → the reformer 112 → the fuel electrode 10a.

  For this reason, the desorbed refrigerant desorbed from the adsorbent S accommodated in either the first adsorber 21 a or the second adsorber 21 b flows into the condenser 22, and the desorbed refrigerant that flows in the fuel supply path 11 It is cooled and condensed by the fuel flowing through (fuel before being introduced into the vaporizer 111). At this time, the fuel flowing through the fuel supply path 11 is heated by the condensation heat generated when the desorbed refrigerant is condensed in the condenser 22 and heated up. The fuel flowing through the fuel supply path 11 heated by the condenser 22 is introduced into the vaporizer 111 and heated by the high temperature of the combustion exhaust gas, and then introduced into the reformer 112 → the fuel electrode 10a.

  According to the configuration of the present embodiment, the cooling heat for cooling the adsorbent S during the adsorption process of the water flowing through the water supply path 13 (water before being introduced into the vaporizer 111) that is one of the reforming target fluids. The desorbed refrigerant of the condenser 22 is cooled by fuel (fuel before being introduced into the vaporizer 111) flowing through the fuel supply path 11, which is one of the reforming target fluids, as a medium.

  Therefore, the water (reformation target fluid) to be introduced into the vaporizer 111 can be heated by the condensation heat generated in the adsorbent S during the adsorption step, and is introduced into the vaporizer 111 by the condensation heat in the condenser 22. The fuel to be reformed (reformation target fluid) can be heated. That is, the heat source that heats the water and fuel that introduces the exhaust heat of the adsorption refrigerator 1 such as the condensation heat generated in the adsorbent S during the adsorption process or the condensation heat in the condenser 22 into the vaporizer 111 of the fuel cell unit 1. Can be used effectively.

  Here, when the amount of water used in the vaporizer 111 is small and the flow rate of fuel used in the fuel cell 10 is large, the exhaust heat of the fuel cell unit 1 when water is vaporized in the vaporizer 111. Although the amount used is small, the amount of exhaust heat used by the fuel cell unit 1 when the fuel is vaporized by the vaporizer 111 increases.

  In this case, as in the configuration of the present embodiment, the fuel before being introduced in the vaporizer 111 is heated by the condensation heat in the condenser 22, so that the fuel is vaporized in the vaporizer 111. The amount of exhaust heat used by the fuel cell unit 1 can be effectively reduced. For this reason, the configuration of the present embodiment is particularly effective when the amount of water used in the vaporizer 111 of the fuel cell unit 1 is small and the flow rate of the fuel used in the fuel cell 10 is large.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. Here, FIG. 5 is an overall configuration diagram of the refrigerator combined fuel cell system according to the fifth embodiment.

  In the above-described first to fourth embodiments, water flowing through the water supply path 13 is directly supplied to the adsorption core 24 and heated before being introduced into the vaporizer 111.

  On the other hand, in this embodiment, cooling water (cooling heat medium) for cooling the adsorbent S is supplied to the adsorbing core 24 and heated by the condensation heat generated in the adsorbent S during the adsorption step. Heat is exchanged between the coolant and the supply fluid supplied to the fuel cell unit 1 (water and fuel before being introduced into the vaporizer 111 and air before being introduced into the air preheater 121). Thus, the supply fluid (water, fuel, air) of the fuel cell 10 is heated.

  Specifically, in the present embodiment, a cooling water circulation path 16 is provided for circulating the cooling water from the condenser 22 to the first four-way valve 25 a → the adsorption core 24 → the second four-way valve 25 b → the condenser 22. Yes.

  The cooling water circulation path 16 includes, in order from the upstream side of the cooling water flow, a circulation pump 161 for circulating cooling water, a condenser 22, an adsorption core 24, a water heating heat exchanger 162, a fuel heating heat exchanger 163, and air. A heating heat exchanger 164 and a hot water supply heat exchanger 51 are connected. The cooling water outlet side of the hot water supply heat exchanger 51 and the cooling water inlet side of the circulation pump 161 are connected.

  The water heating heat exchanger 162 exchanges heat between the cooling water and the water introduced into the vaporizer 111, and the cooling water heated by the condensation heat in the condenser 22 and the condensation heat generated in the adsorbent S during the adsorption step. It is the liquid-liquid heat exchanger which cools. For this reason, the water introduced into the vaporizer 111 is heated by the heat of the cooling water in the water heating heat exchanger 162.

  The fuel heating heat exchanger 163 is a liquid-liquid heat exchanger that exchanges heat between the cooling water and the fuel introduced into the vaporizer 111 and cools the cooling water heated by the condenser 22 and the adsorption core 24. . For this reason, the fuel introduced into the vaporizer 111 is heated by the heat of the cooling water in the fuel heating heat exchanger 163.

  In the present embodiment, the water heating heat exchanger 162 is arranged on the upstream side of the cooling water flow in the cooling water circulation path 16, and the fuel heating heat exchanger 163 is arranged on the downstream side thereof. However, the present invention is not limited to this. Alternatively, the fuel heating heat exchanger 163 may be disposed upstream of the water heating heat exchanger 162.

  The air heating heat exchanger 164 is a gas-liquid heat exchanger that exchanges heat between the cooling water and the air introduced into the air preheater 121 and cools the cooling water heated by the condenser 22 and the adsorption core 24. is there. For this reason, the air introduced into the air preheater 121 is heated by the heat of the cooling water in the air heating heat exchanger 164.

  The hot water supply heat exchanger 51 is a liquid-liquid heat exchanger that exchanges heat between cooling water and hot water and cools the cooling water heated by the condenser 22 and the adsorption core 24. For this reason, the hot water is heated by the heat of the cooling water in the air heating heat exchanger 164. The hot water supply heat exchanger 51 is supplied via the hot water supply path 50.

  Here, in the hot water supply path 50, a hot water exhaust heat recovery heat exchanger 52 that exchanges heat between the combustion exhaust gas and the hot water is provided downstream of the hot water flow in the hot water supply heat exchanger 51, and a hot water supply heat exchanger. A hot water storage tank 53 for storing hot water heated by 51 and a hot water exhaust heat recovery heat exchanger 52 is disposed. Further, a circulating pump 54 for circulating hot water in the hot water storage tank 53 from the hot water supply heat exchanger 51 to the hot water supply waste heat recovery heat exchanger 52 to the hot water storage tank 53 is disposed in the hot water supply path 50.

  In this embodiment, the cooling water flowing through the cooling water circulation path 16 is heated by the condensation heat generated when the desorbed refrigerant is condensed by the condenser 22 and the condensation heat generated by the adsorbent S during the adsorption step. To do. The heated cooling water is cooled by the water heating heat exchanger 162, the fuel heating heat exchanger 163, the air heating heat exchanger 164, and the hot water supply heat exchanger 51.

  At this time, water introduced into the vaporizer 111, fuel introduced into the vaporizer 111, air introduced into the air preheater 121, and hot water are heated by the heat of the cooling water. In the present embodiment, the water heating heat exchanger 162, the fuel heating heat exchanger 163, and the air heating heat exchanger 164 constitute the first supply fluid heating means of the present invention. Moreover, the cooling water flowing through the cooling water circulation path 16 corresponds to the heating medium of the present invention.

  In the configuration of the present embodiment, the water and fuel introduced into the vaporizer 111, the air introduced into the air preheater 121, and the hot water are indirectly heated through the cooling water supplied to the condenser 22 and the adsorption core 24. is doing.

  As a result, the waste heat of the adsorption refrigeration machine 1 such as the condensation heat generated in the adsorbent S during the adsorption process and the condensation heat in the condenser 22 is supplied to the fuel cell unit 1 indirectly through the cooling water, the fuel And as a heat source for heating air.

  In the present embodiment, even if it is difficult to sufficiently dissipate the heat of the cooling water in each of the heat exchangers 162 to 164 for heating, the amount of hot water flowing through the hot water supply path 50 is increased. By doing so, the heat of the cooling water flowing through the cooling water circulation path 16 can be sufficiently dissipated in the hot water supply heat exchanger 51, and thus the heat dissipation amount in the condenser 22 can be ensured.

  Moreover, in this embodiment, since the hot water supply waste heat recovery heat exchanger 52 is provided in the hot water supply water path 50, in addition to the condensation heat in the condenser 22, the hot water supply water can be heated at a high temperature of the combustion exhaust gas. it can. In addition, the structure which arrange | positions the hot water supply waste heat recovery heat exchanger 52 in the hot water supply water path 50, and performs heat exchange with hot water and combustion exhaust gas like this embodiment demonstrates in 1st-4th embodiment. It may be applied to the system.

  Further, in the water heating heat exchanger 162, the fuel heating heat exchanger 163, the air heating heat exchanger 164, and the hot water supply heat exchanger 51 of the present embodiment, the heat exchangers 162 to 164 and 51 flow. Although the flow direction of the fluid is the same as the flow direction of the cooling water, the present invention is not limited to this. For example, the flow direction of the fluid flowing through each of the heat exchangers 162 to 164 and 51 and the flow direction of the cooling water may be opposite directions (opposite flow). In this case, the heat exchange efficiency can be improved by securing a temperature difference between the fluid flowing through the heat exchangers 162 to 164 and 51 and the cooling water.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, this invention is not limited to this, Unless it deviates from the range described in each claim, it is not limited to the wording of each claim, and those skilled in the art Improvements based on the knowledge that a person skilled in the art normally has can be added as appropriate to the extent that they can be easily replaced. For example, various modifications are possible as follows.

  (1) In each of the above-described embodiments, the adsorption refrigeration unit 2 has been described as an example of the heat-driven refrigeration unit. However, an absorption refrigeration unit may be employed as the heat-driven refrigeration unit.

  Here, the absorption refrigerator is an evaporator that evaporates the refrigerant, an absorber in which an absorption liquid (lithium bromide solution or the like) that absorbs (captures) the refrigerant evaporated in the evaporator is enclosed, and is heated. A regenerator that separates (dissociates) the refrigerant absorbed in the absorption liquid, a condenser that condenses the refrigerant separated by the regenerator, and the like are provided. The absorption liquid in the absorption refrigerator corresponds to a trapping material that traps the refrigerant and dissociates the refrigerant when heated.

  For this reason, when the absorption chiller is employed as a heat-driven chiller, the exhaust heat of the fuel cell 10 is used as a heat source when the regenerator separates the refrigerant from the absorbent, and the condenser 22 The heat of condensation generated when the refrigerant is condensed may be used as a heat source for heating the supply fluid supplied to the fuel cell unit 1.

  According to this, the exhaust heat of the fuel cell 10 and the exhaust heat of the absorption chiller (condensation heat in the condenser) can be effectively utilized between the fuel cell unit 1 and the absorption chiller. Therefore, in the combined refrigerator system in which the fuel cell unit 1 and the absorption refrigerator are combined, the exhaust heat in the entire system can be sufficiently effectively used.

  (2) In each of the above-described embodiments, a solid electrolytic fuel cell (SOFC) has been described as an example of the fuel cell 10, but the present invention is not limited to this. For example, a polymer electrolyte fuel cell (PEFC) having a membrane electrode assembly (MEA) formed by sandwiching an electrolyte membrane between a fuel electrode 10a and an air electrode 10b may be employed as the fuel cell 10.

  (3) In each of the above-described embodiments, the supply medium supplied to the fuel cell 10 such as water, fuel (reformation target fluid), and air is heated using the exhaust heat of the fuel cell 10. It is not limited to. For example, a heating device that heats the supply medium may be separately prepared, and the supply medium may be heated by the heating device.

  (4) In each of the above-described embodiments, the adsorption refrigeration machine 2 including two adsorbers 21 has been described. It is good also as a structure.

  (5) In the first to fourth embodiments described above, water flowing through the water supply path 13 as the cooling heat medium for cooling the adsorbent S of the adsorption refrigerator 2 (water before being introduced into the vaporizer 111). However, it is not limited to this. For example, as a cooling heat medium for cooling the adsorbent S of the adsorption refrigeration machine 2, fuel flowing through the fuel supply path 11 that is one of the supply fluids supplied to the fuel cell unit 1 (before being introduced into the vaporizer 111 Fuel) or the like may be used. In this case, in order to prevent problems due to mixing of the cooling heat medium and the heating heat medium in the heat medium path, it is preferable to employ the same fuel as the cooling heat medium as the heating heat medium.

DESCRIPTION OF SYMBOLS 1 Fuel cell unit 10 Fuel cell 112 Reformer 15 Combustion exhaust gas path (2nd supply fluid heating means)
162 Heat exchanger for water heating 163 Heat exchanger for fuel heating 164 Heat exchanger for air heating 2 Adsorption refrigerator (heat-driven refrigerator)
21 Adsorber 22 Condenser (first supply fluid heating means)
24 Adsorption core (capturing material heating means, first supply fluid heating means)
S adsorbent (capture material)

Claims (6)

A reformer (112) that reforms the fluid to be reformed by being heated to generate a fuel gas containing at least hydrogen, and an electric energy is generated by causing an electrochemical reaction between the fuel gas and an oxidant gas. A fuel cell unit (1) having a fuel cell (10) to be generated;
When the refrigerant is trapped by the trapping material to evaporate the refrigerant and exhibit a refrigeration capability, and when heated, the refrigerant trapped by the trapping material is dissociated and the dissociated refrigerant is condensed. A refrigeration combined fuel cell system comprising a heat-driven chiller that dissipates the heat of condensation generated in
Capture material heating means (24) for heating the capture material with exhaust heat of the fuel cell (10);
First supply fluid heating means for heating at least one of the supply fluid supplied to the fuel cell unit (1), such as the reforming target fluid and the oxidant gas, by condensation heat generated in the heat-driven refrigerator ( 22, 24, 162-164),
A refrigerator combined fuel cell system comprising:   The refrigerator combined fuel cell system according to claim 1, further comprising second supply fluid heating means (15) for heating the supply fluid with exhaust heat of the fuel cell (10).   The first supply fluid heating means (22, 24, 162 to 164) heats the supply fluid by exchanging heat between the supply fluid and the heating medium heated by the condensation heat. The refrigerator combined fuel cell system according to claim 1 or 2. The heat driven refrigerator includes an adsorbent (S) that adsorbs the refrigerant as the trapping material and desorbs the refrigerant adsorbed by being heated, and an adsorber in which the adsorbent (S) is enclosed ( 21), and an adsorption refrigerator (2) having a condenser (22) for condensing the refrigerant desorbed from the adsorbent (S),
The first supply fluid heating means (22, 24, 162 to 164) heats at least one of the supply fluids with heat of condensation when the refrigerant is condensed in the condenser (22). The refrigerator combined fuel cell system according to any one of claims 1 to 3.   Further, in the first supply fluid heating means (22, 24, 162 to 164), at least one of the supply fluids is heated by adsorption heat generated when the refrigerant is adsorbed by the adsorbent (S). The refrigerator combined fuel cell system according to claim 4.   In the first supply fluid heating means (22, 24, 162 to 164), the reforming target fluid heated by the condensation heat in the condenser (22) is heated by the adsorption heat in the adsorbent (S). The refrigerator combined fuel cell system according to claim 5, wherein the combined fuel cell system is configured as described above.

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