A photovoltaic complementary energy supply system for aquaculture greenhouses

Abstract

The present invention provides a photovoltaic complementary energy supply system for aquaculture greenhouses, and relates to the technical field of aquaculture greenhouses. In the system, a photovoltaic thermal device that can be integrated with the aquaculture greenhouse provides the required electrical energy and thermal energy for the biomass steam gasification device, so that biomass is converted into biomass gas, and after being collected by a gas-fired power generation device, a flexible and stable power supply is achieved. At the same time, by matching a high-temperature phase change heat storage device and a low-temperature phase change heat storage device, the system's waste heat is stored in a cascade and heat is allocated, so as to achieve a stable and flexible cold and heat supply. The system realizes the coupling of solar photovoltaic building integration technology and biomass gasification technology, making up for the shortcomings of the biomass steam gasification system itself, such as excessive energy consumption, low energy output rate, intermittent and unstable solar energy supply, and solving the problem of flexible cold, heat and electricity supply throughout the year in aquaculture greenhouses.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture greenhouses, and in particular to a light-generating and complementary energy supply system for aquaculture greenhouses. Background Art

[0002] Factory-scale aquaculture greenhouses are closed internal circulation aquaculture systems. The heat, cold and electricity energy consumption required for water treatment and temperature control technology has a complex temporal and spatial distribution, and has the disadvantages of high energy consumption and large waste emissions.

[0003] Some aquaculture greenhouses adopt the design concept of photovoltaic power generation, which has promoted the electrification level of water treatment and temperature control technology in internal circulation aquaculture systems to a certain extent, but there are problems such as instability and poor power supply quality.

[0004] Biomass steam gasification is an emerging technology in recent years. It can convert low-grade biomass energy into high-quality hydrogen-rich fuel gas in a clean and stable energy conversion method, and can be efficiently utilized by a variety of thermal power systems.

[0005] The applicant has found that there are at least the following technical problems in the prior art: First, solar energy has the disadvantages of discontinuity and poor stability, which is more obvious in the three types of solar energy resource areas, making it difficult to meet the demand for flexible cooling, heating and electricity supply in aquaculture greenhouses throughout the year. Although the high-quality power demand of the greenhouse environmental control system can be met by increasing the installed capacity of rooftop photovoltaics, it also makes the rooftop photovoltaics occupy a large area, seriously competing with the indoor light, and over-relying on substation / storage devices, resulting in reduced photovoltaic utilization efficiency, and posing great challenges to the safety of the municipal power grid and the stable operation of aquaculture energy equipment.

[0006] Secondly, the existing biomass steam gasification system has the disadvantages of excessive energy consumption and low energy output, making it difficult to actually provide energy in agricultural facilities such as aquaculture greenhouses.

[0007] In addition, during the year-round production process of aquaculture greenhouses, the demand for heating, cooling and electricity exists simultaneously, but the distribution in time and space is extremely uneven. Summary of the invention

[0008] The purpose of the present invention is to provide a solar-energy complementary energy supply system for aquaculture greenhouses, so as to solve the technical problems existing in the prior art, such as discontinuous and poor stability of solar energy, excessive energy consumption and low energy output rate of biomass water vapor gasification system, simultaneous existence of heating, cooling and electricity demand in aquaculture greenhouses, but extremely uneven distribution in time and space, etc. The many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are described in detail below.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A photo-electric complementary energy supply system for an aquaculture greenhouse comprises a biomass water vapor gasification device, a cooling and purification device, a photovoltaic-thermal building integrated device, a gas-fired power generation device, a high-temperature phase-change heat storage device, a low-temperature phase-change heat storage device and an absorption refrigeration device, wherein the biomass water vapor gasification device is connected to the cooling and purification device through a pipeline, and the cooling and purification device is respectively connected to the photovoltaic-thermal building integrated device, the gas-fired power generation device and the low-temperature phase-change heat storage device through pipelines, the photovoltaic-thermal building integrated device is designed to be integrated with an aquaculture greenhouse building, and is electrically connected to the biomass water vapor gasification device, and the high-temperature phase-change heat storage device is respectively connected to the gas-fired power generation device, the low-temperature phase-change heat storage device and the absorption refrigeration device through pipelines.

[0011] Preferably, the biomass steam gasification device includes an automatic feeding mechanism, a biomass steam catalytic gasification reactor and an automatic discharging mechanism, the automatic feeding mechanism and the automatic discharging mechanism are both connected to the biomass steam catalytic gasification reactor, the biomass steam catalytic gasification reactor is electrically connected to the photovoltaic thermal building integrated device, and is connected to the cooling and purification device through a pipeline.

[0012] Preferably, the photovoltaic-thermal building integrated device is a PVT photovoltaic panel, and the PVT photovoltaic panel is integrated with the aquaculture greenhouse building.

[0013] Preferably, the gas power generation device includes a gas storage tank and an internal combustion engine, the gas storage tank is connected to the cooling and purification device and the internal combustion engine through pipelines, respectively, and the internal combustion engine is connected to the high-temperature phase change heat storage device through pipelines.

[0014] Preferably, the high-temperature phase-change heat storage device comprises a high-temperature heat storage tank and its associated piping system, and the high-temperature heat storage tank is respectively connected to the gas power generation device, the low-temperature phase-change heat storage device and the absorption refrigeration device through pipelines.

[0015] Preferably, the low-temperature phase change heat storage device includes a low-temperature heat storage tank and its associated piping system, and the low-temperature heat storage tank is respectively connected to the cooling and purification device, the photovoltaic thermal building integrated device, the high-temperature phase change heat storage device and the absorption refrigeration device through pipelines.

[0016] Preferably, the absorption refrigeration device comprises an absorption refrigerator and a supporting system, and the absorption refrigerator and the supporting system are respectively connected to the high-temperature phase change heat storage device and the low-temperature phase change heat storage device through pipelines.

[0017] Preferably, the high-temperature phase-change heat storage device is connected to the biomass steam gasification device through a pipeline.

[0018] The beneficial effects of the present invention are as follows: the biomass steam gasification device and the cooling and purification device cooperate with each other to cleanly and stably convert the raw materials into biomass gas with high calorific value, and realize flexible and stable power supply by storing high calorific value gas;

[0019] The photovoltaic and thermal building integrated device is integrated with the aquaculture greenhouse building, and provides the required electricity and heat energy for the biomass steam gasification device, so that the biomass is converted into biomass gas, which is collected by the gas power generation device to achieve flexible and stable power supply. In this process, the system waste heat is cascaded to achieve stable cold and heat supply;

[0020] In view of the characteristics of the aquaculture process's demand for cooling, heating and electricity, by matching high-temperature phase change heat storage devices and low-temperature phase change heat storage devices, the complementary advantages of solar energy and biomass energy are fully utilized, the shortcomings of solar energy's discontinuity and poor stability, the problems of high energy consumption, low energy output rate, and poor compatibility of energy systems in the biomass gasification system are overcome, and the problem of flexible and stable supply of cooling, heating and electricity in aquaculture greenhouses throughout the year is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0023] Figure 2 This is a structural diagram of Embodiment 2 of the present invention;

[0024] In the figure, 1, biomass steam gasification device; 11, automatic feeding mechanism; 12, biomass steam catalytic gasification reactor; 13, automatic discharging mechanism;

[0025] 2. Cooling and purification device;

[0026] 3. Photovoltaic and thermal building integrated device;

[0027] 4. Gas-fired power generation device; 41. Gas storage tank; 42. Internal combustion engine;

[0028] 5. High temperature phase change heat storage device; 51. High temperature heat storage tank;

[0029] 6. Low temperature phase change heat storage device; 61. Low temperature heat storage tank;

[0030] 7. Absorption refrigeration unit; 71. Absorption refrigerator. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Embodiment 1

[0035] Reference Figure 1 The present invention mentions a bio-photovoltaic complementary energy supply system for aquaculture greenhouses, including a biomass water vapor gasification device 1, a cooling and purification device 2, a photovoltaic and thermal building integrated device 3, a gas power generation device 4, a high-temperature phase change heat storage device 5, a low-temperature phase change heat storage device 6 and an absorption refrigeration device 7. The biomass water vapor gasification device 1 is connected to the cooling and purification device 2 through a pipeline, and the cooling and purification device 2 is respectively connected to the gas power generation device 4 and the low-temperature phase change heat storage device 6 through pipelines. The biomass water vapor gasification device 1 and the cooling and purification device 2 cooperate with each other to cleanly and stably convert the original material into biomass gas with high calorific value. According to the characteristics of aquaculture's demand for electricity, a flexible and stable power supply can be achieved through the high calorific value gas reserve;

[0036] The photovoltaic-thermal building integrated device 3 is electrically connected to the biomass water vapor gasification device 1 and is located on the pipeline from the cooling and purification device 2 to the low-temperature phase change heat storage device 6. The photovoltaic-thermal building integrated device 3 provides electrical energy and thermal energy at the same time, supplies power to the biomass water vapor gasification device 1, and functions as the low-temperature phase change heat storage device 6. Photovoltaic-thermal technology is coupled with the biomass water vapor gasification device 1 to form a solar-biomass water vapor gasification coupling system, giving full play to the complementary advantages of solar thermal photovoltaic technology and biomass gasification technology, overcoming the shortcomings of discontinuous and poor stability of solar energy, and overcoming the problems of high energy consumption, low energy output rate, and poor compatibility of energy systems in the biomass gasification system;

[0037] The high-temperature phase-change heat storage device 5 is connected to the gas power generation device 4, the low-temperature phase-change heat storage device 6 and the absorption refrigeration device 7 through pipelines. According to the characteristics of the aquaculture process for the demand for cold, heat and electricity, by matching the high-temperature phase-change heat storage device 5 and the low-temperature phase-change heat storage device 6, when the solar-biomass water vapor gasification coupling system supplies electricity, and according to the complex time-space distribution law of the aquaculture demand for cold, heat and electricity, the system internal waste heat cascade heat storage and heat allocation mode can be used to achieve stable and flexible cold and heat supply;

[0038] The entire system does not require the introduction of additional fossil energy such as natural gas. The utilization rate of renewable energy such as solar energy and biomass energy is higher, which can promote the electrification level of aquaculture greenhouses and the integration level of photovoltaic buildings. The energy conversion rate is faster, the efficiency is higher, and the production capacity is more stable and flexible.

[0039] Embodiment 2

[0040] Reference Figure 2 On the basis of the above embodiment, as an optional implementation mode, the biomass steam gasification device 1 includes an automatic feeding mechanism 11, a biomass steam catalytic gasification reactor 12 and an automatic discharging mechanism 13. The automatic feeding mechanism 11 and the automatic discharging mechanism 13 are respectively connected to the biomass steam catalytic gasification reactor 12. The automatic feeding mechanism 11 can transport the raw materials required for the gasification reaction into the biomass steam catalytic gasification reactor 12. The automatic discharging mechanism 13 is used for discharging. The automatic feeding mechanism 11 and the automatic discharging mechanism 13 are usually provided with a transmission structure for transporting materials. The specific structure is a relatively conventional prior art, so no further description is made;

[0041] The biomass steam catalytic gasification reactor 12 is electrically connected to the photovoltaic-thermal building integrated device 3, and is connected to the cooling and purification device 2 through a pipeline. The biomass steam catalytic gasification reactor 12 can gasify the original material, and can cooperate with the subsequent cooling and purification device 2 to cleanly and stably convert the original material into biomass fuel gas with high calorific value. The biomass steam catalytic gasification reactor 12 can receive electrical energy and thermal energy from the photovoltaic-thermal building integrated device 3, making up for its own disadvantage of excessive energy consumption and improving energy output.

[0042] As an optional implementation, the photovoltaic-thermal building integrated device 3 is a PVT photovoltaic panel. The PVT photovoltaic panel mainly consists of two parts, photovoltaic and thermal. The photovoltaic part can convert solar energy into electrical energy, and the thermal part can convert solar energy into thermal energy. Therefore, the photovoltaic-thermal building integrated device 3 composed of the PVT photovoltaic panel can provide electrical energy and thermal energy at the same time. In this embodiment, the PVT photovoltaic panel can be integrated with the aquaculture greenhouse building. In this case, it is preferably placed on the roof of the aquaculture greenhouse, that is, forming a photovoltaic-thermal building integrated device 3;

[0043] By electrically connecting the PVT photovoltaic panel to the biomass steam gasification device 1, the PVT photovoltaic panel can supply power to the biomass steam catalytic gasification reactor 12 in the biomass steam gasification device 1, so that the biomass steam catalytic gasification reactor 12 can better maintain the temperature required for biomass gasification and convert it into biomass fuel gas with high calorific value. Therefore, the power supply of the PVT photovoltaic panel effectively compensates for the shortcoming of excessive overall energy consumption of the biomass steam catalytic gasification reactor 12.

[0044] By arranging the PVT photovoltaic panels on the pipeline from the cooling and purification device 2 to the low-temperature phase change heat storage device 6, the heat energy collected by the rooftop PVT photovoltaic panels can be transported along the pipeline to the low-temperature phase change heat storage device 6 for energy storage, which maximizes the efficient use of energy.

[0045] The cooling and purification device 2 is a relatively conventional device used in conjunction with the biomass steam gasification device 1. Its main function is to cool and purify the biomass fuel gas generated by the biomass steam gasification device 1, so it will not be further described.

[0046] As an optional implementation, the gas power generation device 4 includes a gas tank 41 and an internal combustion engine 42. The gas tank 41 is connected to the cooling and purification device 2 and the internal combustion engine 42 through pipelines. The biomass gas generated at the cooling and purification device 2 is transported to the gas tank 41 through pipelines with the cooperation of the pump. The gas tank 41 can store the biomass gas and can process the biomass gas using the internal combustion engine 42 according to the electricity demand characteristics of the aquaculture greenhouse, so as to realize flexible and stable power supply for the aquaculture greenhouse, thereby effectively overcoming the shortcomings of discontinuity and poor stability of the traditional solar photovoltaic power system;

[0047] The internal combustion engine 42 is connected to the high-temperature phase change heat storage device 5 through a pipeline. When the internal combustion engine 42 uses biomass gas to generate electricity, a large amount of high-temperature exhaust gas with a temperature of about 350°C can be generated. In this embodiment, the high-temperature exhaust gas of 350°C can be effectively utilized and stored through the high-temperature phase change heat storage device 5 for subsequent use.

[0048] As an optional implementation, the high-temperature phase-change heat storage device 5 includes a high-temperature heat storage tank 51 and its associated piping system. The high-temperature heat storage tank 51 is respectively connected to the gas power generation device 4, the low-temperature phase-change heat storage device 6 and the absorption refrigeration device 7 through pipelines. In the process of the internal combustion engine 42 using biomass gas to generate electricity, a large amount of high-temperature exhaust gas with a temperature of about 350°C can be generated. The heat can be first stored in the high-temperature heat storage tank 51, and according to the characteristics of the cold demand of the aquaculture greenhouse, it can be heat exchanged with the energy in the low-temperature phase-change heat storage device 6, and then the absorption refrigeration device 7 can be driven by using the 120°C steam provided by the high-temperature heat storage tank 51, thereby achieving a stable, flexible and stable supply of cold.

[0049] As an optional implementation, the low-temperature phase change heat storage device 6 includes a low-temperature heat storage tank 61 and its affiliated piping system. The low-temperature heat storage tank 61 is respectively connected to the cooling purification device 2, the high-temperature phase change heat storage device 5 and the absorption refrigeration device 7 through pipelines. The exhaust gas after heat exchange with the high-temperature phase change heat storage device 5, the heat collected by the PVT photovoltaic panel or the waste heat generated by biomass gasification can enter the low-temperature phase change heat storage device 6, and the low-temperature heat is stored in the low-temperature heat storage tank 61. According to the heat demand characteristics of the aquaculture greenhouse, a stable, flexible and stable heat supply can be achieved.

[0050] As an optional implementation, the absorption refrigeration device 7 includes an absorption refrigerator 71 and its supporting system. The absorption refrigerator 71 and its supporting system are respectively connected to the high-temperature phase change heat storage device 5 and the low-temperature phase change heat storage device 6 through pipelines. The high-temperature phase change heat storage device 5 can transport 120°C steam to the absorption refrigerator 71 to drive the lithium bromide absorption refrigerator 71, thereby realizing a stable, flexible and stable supply of cold capacity. The exhaust gas generated after heat exchange can also be transported to the low-temperature phase change heat storage device 6 through pipelines, and the low-temperature heat is stored in the low-temperature phase change heat storage device 6 to realize the rational use of energy.

[0051] During the annual production process of the aquaculture greenhouse, when the demand for heat supply is large, the 120°C steam provided by the high-temperature heat storage tank 51 can be mixed with the heat collected by the PVT photovoltaic panels or the waste heat generated by biomass gasification and then enter the low-temperature heat storage tank 61, thereby achieving a stable, flexible and stable heat supply through the low-temperature heat storage tank 61;

[0052] On the contrary, when the demand for cooling capacity is large, the energy in the low-temperature heat storage tank 61 can be exchanged with the high-temperature exhaust gas of about 350°C delivered by the internal combustion engine 42 and enter the high-temperature heat storage tank 51, and drive the absorption refrigerator 71 to achieve a stable, flexible and stable cooling capacity supply;

[0053] By implementing the mode of cascade phase change heat storage and heat allocation in the above manner, a stable supply of cold and heat is achieved, thereby overcoming the problem of unbalanced demand for cold, heat and electricity during the annual production of aquaculture greenhouses.

[0054] As an optional implementation, the high-temperature phase change heat storage device 5 is connected to the biomass steam gasification device 1 through a pipeline, where the pipeline is led out from the pipeline between the high-temperature phase change heat storage device 5 and the absorption refrigeration device 7. The 120°C steam delivered by the high-temperature phase change heat storage device 5 can be used as the gasification reaction atmosphere required by the biomass steam catalytic gasification reactor 12, thereby achieving rational utilization.

[0055] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A photovoltaic complementary energy supply system for aquaculture greenhouses, characterized in that: The invention comprises a biomass water vapor gasification device (1), a cooling and purification device (2), a photovoltaic and thermal building integrated device (3), a gas power generation device (4), a high-temperature phase change heat storage device (5), a low-temperature phase change heat storage device (6) and an absorption refrigeration device (7), wherein: the biomass water vapor gasification device (1) is connected to the cooling and purification device (2) through a pipeline, the cooling and purification device (2) is respectively connected to the photovoltaic and thermal building integrated device (3), the gas power generation device (4) and the low-temperature phase change heat storage device (6) through pipelines, the photovoltaic and thermal building integrated device (3) is designed to be integrated with an aquaculture greenhouse building, and is electrically connected to the biomass water vapor gasification device (1); The photovoltaic-thermal building integrated device (3) is a PVT photovoltaic panel, and the PVT photovoltaic panel is integrated with the aquaculture greenhouse building; The high-temperature phase-change heat storage device (5) comprises a high-temperature heat storage tank (51) and its associated pipeline system, wherein the high-temperature heat storage tank (51) is respectively connected to the gas power generation device (4), the low-temperature phase-change heat storage device (6) and the absorption refrigeration device (7) through pipelines; The low-temperature phase-change heat storage device (6) comprises a low-temperature heat storage tank (61) and its associated pipeline system, and the low-temperature heat storage tank (61) is respectively connected to the cooling and purification device (2), the photovoltaic thermal building integrated device (3), the high-temperature phase-change heat storage device (5) and the absorption refrigeration device (7) through pipelines.

2. The photovoltaic complementary energy supply system for aquaculture greenhouse according to claim 1 is characterized in that: The biomass steam gasification device (1) comprises an automatic feeding mechanism (11), a biomass steam catalytic gasification reactor (12) and an automatic discharging mechanism (13); the automatic feeding mechanism (11) and the automatic discharging mechanism (13) are both connected to the biomass steam catalytic gasification reactor (12); the biomass steam catalytic gasification reactor (12) is electrically connected to the photovoltaic-thermal building integrated device (3), and is connected to the cooling and purification device (2) via a pipeline.

3. The photovoltaic complementary energy supply system for aquaculture greenhouse according to claim 1 is characterized in that: The gas power generation device (4) comprises a gas storage tank (41) and an internal combustion engine (42); the gas storage tank (41) is connected to the cooling and purification device (2) and the internal combustion engine (42) respectively through pipelines; and the internal combustion engine (42) is connected to the high-temperature phase change heat storage device (5) through pipelines.

4. The photovoltaic complementary energy supply system for aquaculture greenhouse according to claim 1 is characterized in that: The absorption refrigeration device (7) comprises an absorption refrigerator (71) and a supporting system. The absorption refrigerator (71) is a lithium bromide absorption refrigerator. The lithium bromide absorption refrigerator and the supporting system are respectively connected to the high-temperature phase-change heat storage device (5) and the low-temperature phase-change heat storage device (6) through pipelines.

5. The photovoltaic complementary energy supply system for aquaculture greenhouse according to claim 1 is characterized in that: The high-temperature phase-change heat storage device (5) is connected to the biomass steam gasification device (1) via a pipeline.

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