Agricultural greenhouse applying solid oxide fuel cell

Abstract

The invention discloses an agricultural greenhouse using a solid oxide fuel cell, which comprises an SOFC power generation module, a greenhouse, a first heat exchanger and a second control member, and the SOFC power generation module is provided with an air outlet; the greenhouse is provided with an air inlet and an air outlet, the air inlet is communicated with the air outlet through a first pipeline, and the first pipeline is provided with a first control part; the first heat exchanger is provided with a hot fluid channel and a cold fluid channel, an inlet of the hot fluid channel communicates with the air outlet, and an outlet of the cold fluid channel communicates with the air inlet. According to the system, CO2 is generated through the SOFC power generation module, the greenhouse communicates with the air outlet through the first pipeline, the first control piece for controlling the flow of the first pipeline is arranged on the first pipeline, then the CO2 concentration in the greenhouse can be controlled, the first heat exchanger is arranged, CO2 exhausted by the SOFC power generation module can exchange heat with fresh air entering the greenhouse, and the CO2 concentration in the greenhouse can be controlled. And a second control piece capable of controlling the gas discharge amount is arranged, so that the temperature in the greenhouse is controlled.

Description

Technical Field

[0001] The invention relates to the field of fuel cells, and in particular to an agricultural greenhouse using solid oxide fuel cells. Background Art

[0002] Many agricultural greenhouses currently use straw burning to heat the greenhouse and replenish carbon dioxide. When the combustion is incomplete, toxic gases will be produced, and there will also be other pollution such as smoke and dust.

[0003] Most existing greenhouses use sprinkler humidification, which causes large fluctuations in humidity and temperature control and makes it difficult to accurately control humidity.

[0004] Solid Oxide Fuel Cell (SOFC) is a highly efficient power generation device that converts the chemical energy of fuel (such as natural gas, H2, synthesis gas, biogas, methanol, etc.) directly into electrical energy through electrochemical reactions without going through a combustion process. SOFC power generation devices have the advantages of high power generation efficiency, no dust emissions, no NOx emissions, and the ability to achieve centralized CO2 emissions.

[0005] Based on this, there is an urgent need for an agricultural greenhouse that uses solid oxide fuel cells to solve the problems of heating, humidity control, and carbon dioxide replenishment in the greenhouse. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an agricultural greenhouse using a solid oxide fuel cell.

[0007] According to the first aspect of the embodiment of the present invention, an agricultural greenhouse using solid oxide fuel cells includes a SOFC power generation module, a greenhouse, a first heat exchanger and a second control component, the SOFC power generation module has an air outlet, and the SOFC power generation module is used to generate electricity using the introduced fuel and air, and obtain gaseous products, and the gaseous products include carbon dioxide; the greenhouse has an air inlet and an air outlet, the air inlet is connected to the air outlet through a first pipe, and the first pipe is provided with a first control component for controlling the gas flow rate; the first heat exchanger has a hot fluid channel for discharging the gaseous products and a cold fluid channel for introducing fresh air, the inlet of the hot fluid channel is connected to the air outlet, and the outlet of the cold fluid channel is connected to the air inlet; the second control component is used to control the hot fluid channel.

[0008] The agricultural greenhouse using solid oxide fuel cells according to the embodiment of the present invention has at least the following technical effects: a pollution-free exhaust gas rich in CO2 is generated through the SOFC power generation module, wherein the CO2 can also be absorbed and utilized by plants, and the air inlet of the greenhouse is connected to the air outlet of the SOFC power generation module through a first pipe, and a first control element is provided on the first pipe, and the flow rate of the first pipe can be controlled by the first control element to thereby control the CO2 concentration in the greenhouse, and by providing a first heat exchanger, the CO2 discharged from the SOFC power generation module can exchange heat with the fresh air entering the greenhouse, and by providing a second control element, the gas discharge amount can be controlled by the second control element to thereby control the temperature of the fresh air, thereby controlling the temperature in the greenhouse.

[0009] According to some embodiments of the present invention, the inlet of the hot fluid channel is connected to the air outlet through a second pipe, and the second control member is disposed on the second pipe.

[0010] According to some embodiments of the present invention, the inlet of the cold fluid channel is connected to a third pipe, the outlet of the cold fluid channel is connected to the air inlet through a fourth pipe, a fifth pipe is connected between the third pipe and the fourth pipe, and the fifth pipe is provided with a third control component for controlling the gas flow rate.

[0011] According to some embodiments of the present invention, a humidification tank is also included, and the fourth pipe includes a first pipe segment and a second pipe segment, the two ends of the first pipe segment are respectively connected to the outlet of the cold fluid channel and the inlet of the humidification tank, the second pipe segment is respectively connected to the outlet of the humidification tank and the air inlet, and the fifth pipe is connected to the first pipe segment.

[0012] According to some embodiments of the present invention, the SOFC power generation module includes a second heat exchanger, a fuel cell stack and a burner, the second heat exchanger includes a first heat exchange channel, a second heat exchange channel and a third heat exchange channel, the third heat exchange channel can exchange heat with the first heat exchange channel and the second heat exchange channel, the first heat exchange channel is used to allow air to pass through, the second heat exchange channel is used to allow fuel to pass through, the outlet of the first heat exchange channel and the outlet of the second heat exchange channel are both connected to the fuel cell stack, the burner is respectively connected to the inlet of the fuel cell stack and the third heat exchange channel, and the outlet of the third heat exchange channel is the air outlet.

[0013] According to some embodiments of the present invention, it also includes an air inlet duct connected to the first heat exchange channel, the air inlet duct is provided with a fan and a third heat exchanger, the air outlet is connected to the third heat exchanger through a sixth duct, and the third heat exchanger is used to preheat the air on the air inlet duct.

[0014] According to some embodiments of the present invention, it also includes a fuel inlet pipeline connected to the second heat exchange channel, and a desulfurizer and a reformer are sequentially arranged on the fuel inlet pipeline. The second heat exchanger also includes a fourth heat exchange channel, and the third heat exchange channel can also exchange heat with the fourth heat exchange channel. The inlet of the fourth heat exchange channel is used to introduce ultrapure water, and the outlet of the fourth heat exchange channel is connected to the pipeline between the desulfurizer and the reformer.

[0015] According to some embodiments of the present invention, it also includes a tap water pipe, which is connected to the inlet of the fourth heat exchange channel. The humidification tank has a nozzle, which is connected to the tap water pipe through a seventh pipe. The seventh pipe is provided with a first solenoid valve.

[0016] According to some embodiments of the present invention, a water collecting tank is further included, the humidification tank has a first water outlet for draining water, the first heat exchanger has a second water outlet for draining condensed water, the water collecting tank is connected to the first water outlet and the second water outlet respectively, and the water collecting tank is connected to the tap water pipe.

[0017] According to some embodiments of the present invention, the SOFC power generation module has an electrical output end, the electrical output end is connected to an inverter, and the inverter is used to be electrically connected to an electrical device.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the structure of the connection between the SOFC power generation module, the first heat exchanger and the greenhouse;

[0021] Figure 2 It is a structural schematic diagram of the connection between the SOFC power generation module and the air inlet pipe, the fuel inlet pipe and the tap water pipe;

[0022] Figure 3 Schematic diagram of the structure of an agricultural greenhouse using solid oxide fuel cells.

[0023] Reference numerals: SOFC power generation module 100, inverter 101, air outlet 110, second heat exchanger 120, first heat exchange channel 121, second heat exchange channel 122, third heat exchange channel 123, fourth heat exchange channel 124, fuel cell stack 130, burner 140, air inlet duct 150, air inlet fan 151, third heat exchanger 152, sixth duct 160, fuel inlet duct 170, desulfurizer 171, reformer 172, tap water duct 180, seventh duct 181 , the first solenoid valve 182, the air inlet 200, the air outlet 300, the first pipeline 400, the first control component 500, the first heat exchanger 600, the hot fluid channel 610, the second pipeline 611, the cold fluid channel 620, the third pipeline 621, the fourth pipeline 622, the first pipe section 6221, the second pipe section 6222, the fifth pipeline 623, the third control component 624, the second water outlet 630, the second control component 700, the humidification tank 800, the first water outlet 810, and the water collecting tank 900. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figure 1As shown, the agricultural greenhouse using solid oxide fuel cells according to an embodiment of the present invention includes a SOFC power generation module 100, a greenhouse (not shown in the figure), a first heat exchanger 600 and a second control component 700, the SOFC power generation module 100 has an outlet 110, and the SOFC power generation module 100 is used to generate electricity using the introduced fuel and air, and obtain gaseous products, and the gaseous products include carbon dioxide; the greenhouse has an air inlet 200 and an air outlet 300, the air inlet 200 is connected to the air outlet 110 through a first pipe 400, and the first pipe 400 is provided with a first control component 500 for controlling the gas flow rate; the first heat exchanger 600 has a hot fluid channel 610 for discharging gaseous products and a cold fluid channel 620 for introducing fresh air, the inlet of the hot fluid channel 610 is connected to the outlet 110, and the outlet of the cold fluid channel 620 is connected to the air inlet 200; the second control component 700 is used to control the hot fluid channel 610.

[0029] The SOFC power generation module 100 generates pollution-free exhaust gas rich in CO2, wherein the CO2 can also be absorbed and utilized by plants, and the air inlet 200 of the greenhouse is connected to the air outlet 110 of the SOFC power generation module 100 through the first pipe 400, and the first pipe 400 is provided with a first control component 500, and the flow rate of the first pipe 400 can be controlled by the first control component 500 to control the CO2 concentration in the greenhouse, and the first heat exchanger 600 is provided, so that the exhaust gas discharged from the SOFC power generation module 100 can exchange heat with the fresh air entering the greenhouse, and the second control component 700 is provided, so that the gas discharge amount can be controlled by the second control component 700 to control the temperature of the fresh air, thereby controlling the temperature in the greenhouse.

[0030] During operation, external fuel and external air are transported to the SOFC power generation module 100 through pipelines. The SOFC power generation module 100 generates electricity and produces exhaust gas rich in CO2. A portion of the exhaust gas enters the air inlet 200 of the greenhouse through the air outlet 110 and the first pipeline 400. When the CO2 concentration inside the greenhouse is too high, the first control component 500 reduces the flow of the first pipeline 400 to reduce the CO2 concentration inside the greenhouse. On the contrary, the first control component 500 increases the flow of the first pipeline 400. At the same time, another portion of the exhaust gas enters the air inlet 200 through the air outlet 110 and the hot fluid channel 610. The inlet of the hot fluid channel 610 enters the hot fluid channel 610 and is then discharged from the outlet of the hot fluid channel 610. The external fresh air enters the cold fluid channel 620 through the inlet of the cold fluid channel 620. The fresh air in the cold fluid channel 620 exchanges heat with the exhaust gas in the hot fluid channel 610. After the heat exchange, the fresh air is discharged from the cold fluid channel 620 and transported to the air inlet 200 of the greenhouse. Among them, when the temperature inside the greenhouse is relatively high, the second control component 700 reduces the flow of the hot fluid channel 610 to reduce the temperature of the fresh air. Conversely, the second control component 700 increases the flow of the hot fluid channel 610 to increase the temperature of the fresh air.

[0031] Specifically, the fuel used by the SOFC power generation module 100 can be biogas. When biogas is used, the products are only CO2 and water, which is convenient for processing. Natural gas, H2, synthesis gas, methanol or other gases can also be used.

[0032] Specifically, the first control element 500 may be a damper or other control element that can control the gas flow rate.

[0033] Specifically, the air outlet 300 of the greenhouse is connected to the inlet of the hot fluid channel 610 to recover the heat discharged from the greenhouse and exchange heat with the fresh air.

[0034] Specifically, an outlet of the hot fluid channel 610 is connected to an exhaust fan to provide power for exhausting the gas in the hot fluid channel 610 .

[0035] Specifically, the first heat exchanger 600 may be a full heat exchanger, or other types of heat exchangers such as a plate-fin heat exchanger may be selected according to the situation.

[0036] In some embodiments of the present invention, Figure 1As shown, the inlet of the hot fluid channel 610 is connected to the air outlet 110 through the second pipe 611, and the second control component 700 is arranged on the second pipe 611 to control the flow rate of the exhaust gas entering the hot fluid channel 610 through the second control component 700, so as to control the temperature in the greenhouse; during operation, when the temperature inside the greenhouse is relatively high, the second control component 700 closes the flow rate of the second pipe 611, reduces the amount of heat exchange between the exhaust gas and the fresh air, and thus reduces the temperature inside the greenhouse; conversely, the second control component 700 opens the flow rate of the second pipe 611, increases the amount of heat exchange between the exhaust gas and the fresh air, and thus increases the temperature inside the greenhouse; the second control component 700 can adopt an air valve or other control component that can control the flow rate.

[0037] In a further embodiment of the present invention, Figure 1 As shown, the inlet of the cold fluid channel 620 is connected to the third pipe 621, and the outlet of the cold fluid channel 620 is connected to the air inlet 200 through the fourth pipe 622. A fifth pipe 623 is connected between the third pipe 621 and the fourth pipe 622. The fifth pipe 623 is provided with a third control component 624 for controlling the gas flow rate. By providing the fifth pipe 623, when the fresh air or cold air outside the greenhouse enters the greenhouse, it is divided into two paths, one path enters the cold fluid channel 620 for heat exchange, and the other path bypasses to the outlet of the cold fluid channel 620 through the fifth pipe 623, and then the proportion of the fresh air or cold air discharged from the cold fluid channel 620 is controlled by the third control component 624, which can assist in controlling the inlet air temperature of the greenhouse.

[0038] Specifically, an air intake fan can be provided on the first pipe 400, and the outlet of the cold fluid channel 620 is connected to the first pipe 400 through the fourth pipe 622. The connection point between the fourth pipe 622 and the first pipe 400 is located on the left side of the air intake fan. By providing the air intake fan, the exhaust gas in the first pipe 400 is provided with power to enter the greenhouse, and the fresh air in the fourth pipe 622 is provided with power to enter the greenhouse.

[0039] In a further embodiment of the present invention, Figure 1 As shown, a humidifying tank 800 is also included, and the fourth pipe 622 includes a first pipe section 6221 and a second pipe section 6222. The two ends of the first pipe section 6221 are respectively connected to the outlet of the cold fluid channel 620 and the inlet of the humidifying tank 800, and the second pipe section 6222 is respectively connected to the outlet of the humidifying tank 800 and the air inlet 200, and the fifth pipe 623 is connected to the first pipe section 6221. By providing the humidifying tank 800, the humidifying tank 800 can humidify the fresh air on the fourth pipe 622, thereby controlling the humidity inside the greenhouse;

[0040] Existing agricultural greenhouse humidification generally sets up a separate spraying system in the greenhouse, which requires more water pipes and spraying equipment, and it is difficult to ensure uniformity. At the same time, since the spraying and heating systems are independent, it is easy to cause temperature fluctuations in the greenhouse during spraying. The humidification tank 800 of the present invention performs centralized humidification, the humidification equipment is simple, and the temperature and humidity control are the same system. During humidification, the temperature fluctuation in the greenhouse is smaller;

[0041] During operation, when it is detected that the humidity in the greenhouse is too low, the humidifier tank 800 is started, water is passed into the humidifier tank 800, and the humidifier tank 800 humidifies the fresh air. After the humidity reaches the set humidity target value, the humidifier tank 800 stops humidifying; when it is detected that the humidity in the greenhouse is too high, the humidifier tank 800 needs to be in a non-humidifying state, and the amount of fresh air passing through the third pipe 621 needs to be increased. The third control component 624 can be opened appropriately, and the fifth pipe 623 introduces more external dry air for dehumidification. At the same time, the second control component 700 should be opened appropriately to maintain a stable temperature in the greenhouse; the amount of fresh air in the pipeline in the third pipe 621 can also be increased by increasing the speed of the air intake fan. At this time, in order to maintain a stable CO2 concentration in the greenhouse, the first control component 500 needs to be appropriately closed, and in order to maintain a stable temperature in the greenhouse, the second control component 700 needs to be appropriately opened.

[0042] In a further embodiment of the present invention, Figure 2 As shown, the SOFC power generation module 100 includes a second heat exchanger 120, a cell stack 130 and a burner 140. The second heat exchanger 120 includes a first heat exchange channel 121, a second heat exchange channel 122 and a third heat exchange channel 123. The third heat exchange channel 123 can exchange heat with the first heat exchange channel 121 and the second heat exchange channel 122. The first heat exchange channel 121 is used to pass air, and the second heat exchange channel 122 is used to pass fuel. The outlet of the first heat exchange channel 121 and the outlet of the second heat exchange channel 122 are both connected to the cell stack 130. The burner 140 is respectively connected to the cell stack 130 and the inlet of the third heat exchange channel 123. The outlet of the third heat exchange channel 123 is an air outlet 110. Heat is exchanged with the first heat exchange channel 121 and the second heat exchange channel 122 through the third heat exchange channel 123 to preheat air and fuel and speed up the processing speed of the cell stack 130.

[0043] During operation, air enters the fuel cell stack 130 through the first heat exchange channel 121 to participate in the electrochemical reaction to generate electricity, and fuel enters the fuel cell stack 130 through the second heat exchange channel 122 to participate in the electrochemical reaction to generate electricity. The unreacted fuel and air enter the burner 140 to burn and obtain high-temperature exhaust gas. The high-temperature exhaust gas enters the third heat exchange channel 123 to exchange heat with the air in the first heat exchange channel 121 and the fuel in the second heat exchange channel 122 to obtain medium-temperature exhaust gas. Figure 3As shown, the medium-temperature exhaust gas is discharged through the outlet 110, a part of the medium-temperature exhaust gas enters the greenhouse through the first pipe 400 and the air inlet 200, and a part of the medium-temperature exhaust gas enters the hot fluid channel 610 through the second pipe 611, and then is discharged from the outlet of the hot fluid channel 610.

[0044] In a further embodiment of the present invention, Figure 2 As shown, it also includes an air inlet duct 150 connected to the first heat exchange channel 121, and an air inlet fan 151 and a third heat exchanger 152 are provided on the air inlet duct 150. The air outlet 110 is connected to the third heat exchanger 152 through the sixth duct 160. The third heat exchanger 152 is used to preheat the air on the air inlet duct 150, and is connected to the air outlet 110 through the third heat exchanger 152 to make full use of the medium-temperature exhaust gas to perform secondary heating of the air.

[0045] Specifically, the third heat exchanger 152 has a fifth heat exchange channel and a sixth heat exchange channel. The air in the air inlet duct 150 can flow through the fifth heat exchange channel. The two ends of the sixth heat exchange channel are respectively connected to the sixth duct 160 and the outside. During operation, the air enters the first heat exchange channel 121 through the air inlet duct 150 and the fifth heat exchange channel. The medium-temperature exhaust gas enters the sixth heat exchange channel through the sixth duct 160, and is discharged to the outside of the greenhouse at the outlet of the sixth heat exchange channel. In the process of the medium-temperature exhaust gas flowing through the sixth heat exchange channel, the medium-temperature exhaust gas in the sixth heat exchange channel preheats the air in the fifth heat exchange channel. The preheated air enters the first heat exchange channel 121 again to exchange heat with the third heat exchange channel 123 for reheating. Condensation water will be generated after the medium-temperature exhaust gas is cooled by the air, and the condensation water flows into the water collecting tank 900 through the pipeline.

[0046] In a further embodiment of the present invention, Figure 2 As shown, it also includes a fuel inlet pipeline 170 connected to the second heat exchange channel 122, and a desulfurizer 171 and a reformer 172 are sequentially arranged on the fuel inlet pipeline 170. The second heat exchanger 120 also includes a fourth heat exchange channel 124. The third heat exchange channel 123 can also exchange heat with the fourth heat exchange channel 124. The inlet of the fourth heat exchange channel 124 is used to introduce ultrapure water obtained after filtration by a purification device. The outlet of the fourth heat exchange channel 124 is connected to the pipeline between the desulfurizer 171 and the reformer 172. By providing the fourth heat exchange channel 124, the water in the fourth heat exchange channel 124 can be converted into water vapor through the high-temperature exhaust gas of the burner 140, so as to make full use of the high-temperature exhaust gas discharged from the burner 140.

[0047] During operation, the fuel enters the fuel pipeline 170, is desulfurized by the desulfurizer 171, is mixed with the steam from the heat exchange, is processed by the reformer 172, and then enters the second heat exchange channel 122 for heat exchange.

[0048] Specifically, the second heat exchanger 120 can be a three-in-one heat exchanger, and the third heat exchange channel 123 simultaneously exchanges heat with the first heat exchange channel 121, the second heat exchange channel 122 and the fourth heat exchange channel 124; the second heat exchanger 120 can also be divided into three heat exchangers, which are respectively provided with the first heat exchange channel 121, the second heat exchange channel 122 and the fourth heat exchange channel 124, and are all provided with the third heat exchange channel 123.

[0049] Specifically, a fuel flow controller MFC is also provided on the left side of the desulfurizer 171 .

[0050] In a further embodiment of the present invention, Figure 2 , 3 As shown, it also includes a tap water pipe 180, and a filter, a water pump and a purification device are arranged between the tap water pipe 180 and the inlet of the fourth heat exchange channel 124. The humidification tank 800 has a nozzle (not shown in the figure), and the nozzle is connected to the tap water pipe 180 through a seventh pipe 181. The seventh pipe 181 is provided with a first solenoid valve 182, so that the humidification tank 800 and the fourth heat exchange channel 124 share a pipe.

[0051] During operation, the first solenoid valve 182 is started, and the tap water on the tap water pipe 180 is supplied to the nozzle in the humidification tank 800, and the nozzle humidifies the fresh air.

[0052] In a further embodiment of the present invention, Figure 3 As shown, it also includes a water collecting tank 900, the humidifying tank 800 has a first water outlet 810 for draining water, the first heat exchanger 600 has a second water outlet 630 for draining condensed water, the water collecting tank 900 is connected to the first water outlet 810 and the second water outlet 630 respectively, and the water collecting tank 900 is connected to the tap water pipe 180 to recover the water in the humidifying tank 800 and the condensed water generated by the first heat exchanger 600 through the water collecting tank 900, so as to reuse the system condensed water.

[0053] Specifically, Figure 2 As shown, the third heat exchanger 152 has a condensate outlet, which is connected to the water collecting tank 900 to recover the condensate discharged from the third heat exchanger 152; since water will precipitate when the exhaust gas temperature drops below 50°C, the first heat exchanger 600 and the third heat exchanger 152 are both connected to the water collecting tank 900 to recover and reuse the condensate.

[0054] Specifically, Figure 3As shown, a filter, a pump and a purification device are sequentially arranged on the tap water pipe 180, the connection point between the water collecting tank 900 and the tap water pipe 180 is located between the filter and the pump, and the connection point between the humidification tank 800 and the tap water pipe 180 is located between the pump and the purification device.

[0055] In a further embodiment of the present invention, Figure 1 As shown, the SOFC power generation module 100 has an electrical output end, which is connected to an inverter 101. The inverter 101 is used to be electrically connected to an electrical device. The electrical device may be an electrical device in a greenhouse, for example, a light for providing illumination to the plants in the greenhouse, an air conditioner in the greenhouse, a temperature sensor in the greenhouse, a humidity sensor in the greenhouse, and a CO2 concentration sensor in the greenhouse, wherein the air conditioner can lower the temperature in the agricultural greenhouse; the temperature sensor can be electrically connected to the second control component 700 and the third control component 624 to accurately control the temperature in the greenhouse; the humidity sensor can be electrically connected to the humidification tank 800 and the third control component 624 to accurately control the humidity in the greenhouse; the CO2 concentration sensor can be electrically connected to the first control component 500 to accurately control the CO2 concentration in the greenhouse.

[0056] In the description of this specification, the description with reference to the terms "some embodiments" or "it is conceivable that" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An agricultural greenhouse using a solid oxide fuel cell, characterized in that: include: A SOFC power generation module having a gas outlet, wherein the SOFC power generation module is used to generate electric energy by using the introduced fuel and air, and obtain a gaseous product, wherein the gaseous product includes carbon dioxide; A greenhouse, having an air inlet and an air outlet, wherein the air inlet is connected to the air outlet through a first pipe, and the first pipe is provided with a first control element for controlling the gas flow; A first heat exchanger having a hot fluid channel for discharging the gaseous product and a cold fluid channel for introducing fresh air, wherein the inlet of the hot fluid channel is connected to the air outlet, and the outlet of the cold fluid channel is connected to the air inlet; The second control element is used to control the flow rate of the thermal fluid channel.

2. The agricultural greenhouse using solid oxide fuel cells according to claim 1, characterized in that: The inlet of the hot fluid channel is communicated with the air outlet through a second pipe, and the second control member is arranged on the second pipe.

3. The agricultural greenhouse using solid oxide fuel cells according to claim 2, characterized in that: The inlet of the cold fluid channel is connected to a third pipe, the outlet of the cold fluid channel is connected to the air inlet through a fourth pipe, a fifth pipe is connected between the third pipe and the fourth pipe, and the fifth pipe is provided with a third control component for controlling the gas flow rate.

4. The agricultural greenhouse using solid oxide fuel cells according to claim 3, characterized in that: It also includes a humidification tank, and the fourth pipe includes a first pipe section and a second pipe section, the two ends of the first pipe section are respectively connected to the outlet of the cold fluid channel and the inlet of the humidification tank, the second pipe section is respectively connected to the outlet of the humidification tank and the air inlet, and the fifth pipe is connected to the first pipe section.

5. The agricultural greenhouse using solid oxide fuel cells according to claim 4, characterized in that: The SOFC power generation module includes a second heat exchanger, a fuel cell stack and a burner. The second heat exchanger includes a first heat exchange channel, a second heat exchange channel and a third heat exchange channel. The third heat exchange channel can exchange heat with the first heat exchange channel and the second heat exchange channel. The first heat exchange channel is used to allow air to pass through, and the second heat exchange channel is used to allow fuel to pass through. The outlet of the first heat exchange channel and the outlet of the second heat exchange channel are both connected to the fuel cell stack. The burner is respectively connected to the inlet of the fuel cell stack and the third heat exchange channel, and the outlet of the third heat exchange channel is the air outlet.

6. The agricultural greenhouse using solid oxide fuel cells according to claim 5, characterized in that: It also includes an air inlet duct connected to the first heat exchange channel, on which an air inlet fan and a third heat exchanger are provided, and the air outlet is connected to the third heat exchanger through a sixth duct, and the third heat exchanger is used to preheat the air on the air inlet duct.

7. The agricultural greenhouse using solid oxide fuel cells according to claim 5, characterized in that: It also includes a fuel inlet pipeline connected to the second heat exchange channel shown, and a desulfurizer and a reformer are arranged on the fuel inlet pipeline in sequence. The second heat exchanger also includes a fourth heat exchange channel. The third heat exchange channel can also exchange heat with the fourth heat exchange channel. The inlet of the fourth heat exchange channel is used to introduce ultrapure water, and the outlet of the fourth heat exchange channel is connected to the pipeline between the desulfurizer and the reformer.

8. The agricultural greenhouse using solid oxide fuel cells according to claim 7, characterized in that: It also includes a tap water pipe, which is connected to the inlet of the fourth heat exchange channel. The humidification tank has a nozzle, which is connected to the tap water pipe through a seventh pipe. The seventh pipe is provided with a first solenoid valve.

9. The agricultural greenhouse using solid oxide fuel cells according to claim 8, characterized in that: It also includes a water collecting tank, the humidification tank has a first water outlet for draining water, the first heat exchanger has a second water outlet for draining condensed water, the water collecting tank is connected to the first water outlet and the second water outlet respectively, and the water collecting tank is connected to the tap water pipeline.

10. The agricultural greenhouse using solid oxide fuel cells according to claim 1, characterized in that: The SOFC power generation module has an electrical output end, the electrical output end is connected to an inverter, and the inverter is used to be electrically connected to an electrical device.

Images