Modularized composite groove type photo-thermal system

Abstract

The utility model relates to the technical field of photo-thermal energy utilization, in particular to a modularized composite groove type photo-thermal system which comprises a plurality of module units used in parallel or in series and an energy using end connected with the module units, and each module unit comprises a photo-thermal collector assembly, a heat exchanger and an energy storage tank. The photo-thermal collector assembly is connected with the heat exchanger through a pipeline to form a first circulation subsystem, and the heat exchanger is connected with the energy storage tank through a pipeline to form a second circulation subsystem; and the energy storage tank is connected with the energy consumption end through a pipeline to form a third circulation subsystem. According to the utility model, a modular design is adopted, so that each component does not need to be redesigned like a traditional system when facing different application scenes, such as heat supply requirements of buildings with different scales, energy utilization in different geographical environments and the like; the technical problems that an existing photo-thermal system lacks modular design, the system needs to be redesigned for different application scenes, the period is long, and cost is high are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of light and heat energy utilization, in particular to a modular composite groove type light and heat system. BACKGROUND

[0002] As a green and environmentally friendly heating method, solar light and heat heating has received extensive attention and application worldwide in recent years. It mainly collects solar radiation energy through a solar collector and converts it into heat energy, thereby providing heat support for building heating, domestic hot water supply and other fields. Currently, solar light and heat heating technology has achieved certain development results, and it has been successfully applied to heating links of residential buildings, commercial buildings and industrial production in some areas, which has alleviated the pressure of traditional energy supply to a certain extent and reduced carbon emissions.

[0003] However, the existing solar light and heat energy supply system 100 still has the following technical problems in actual application:

[0004] 1. The energy supply problem of the solar light and heat system is more prominent at night or during periods of insufficient light. At this time, many light and heat systems have to rely on auxiliary equipment such as electric heating boilers to maintain heating, thereby increasing energy consumption costs. For example, the energy supply system 100 of the collection groove type solar collector and electrode boiler disclosed in the Chinese utility model patent with application number 201821098392.X.

[0005] 2. The existing system lacks modular design capability. For different application scenarios (such as residential areas, industrial plants or climate difference areas), the number of collectors, heat storage capacity and pipe layout need to be redesigned according to the heat load demand. This non-modular design approach makes the development, installation and maintenance costs of the light and heat system high, prolongs the construction period of the project, and limits the rapid popularization and application of light and heat technology in a wider field. UTILITY MODEL CONTENTS

[0006] The utility model provides a modular composite groove type light and heat system, which can solve the technical problems of the existing light and heat system lacking modular design, leading to the need to redesign the system for different application scenarios, resulting in long cycle and high cost.

[0007] The present application provides the following technical solutions:

[0008] A modular composite groove type light and heat system, comprising a plurality of parallel or series connected module units and an energy utilization end connected to the module units. Each module unit comprises a light and heat collector assembly, a heat exchanger and an energy storage tank. The light and heat collector assembly is connected to the heat exchanger through a pipeline to form a first circulation subsystem. The heat exchanger is connected to the energy storage tank through a pipeline to form a second circulation subsystem. The energy storage tank is connected to the energy utilization end through a pipeline to form a third circulation subsystem.

[0009] Advantages:

[0010] 1、 The system adopts modular design, and contains a plurality of parallel or series module units. When facing different application scenarios, such as heating demand of different scale buildings, energy utilization in different geographical environments, etc., it is not necessary to redesign each component as in the traditional system. For example, in the small residential heating scene, the demand can be met by using a single module or a small number of module units in series; and for large commercial buildings, a plurality of module units can be connected in parallel. This way greatly shortens the design cycle, reduces the research and development cost, and improves the implementation efficiency of the project.

[0011] 2、 The energy storage tank provided in the system, after the solar energy collected by the solar thermal collector assembly is transmitted to the heat exchanger through the first circulating subsystem, the heat exchanger transmits heat to the energy storage tank to form the second circulating subsystem, and the energy storage tank is connected with the energy consuming end through the third circulating subsystem. During the day when the light is sufficient, the energy storage tank stores a large amount of heat energy on one hand, and on the other hand, transmits heat to the energy consuming end through the third circulating subsystem for use; while at night or when the light is insufficient, the first circulating subsystem and the second circulating subsystem are closed, and the third circulating subsystem is opened, the energy storage tank releases the stored heat energy, continuously provides heat for the energy consuming end, and ensures the stability of energy supply. Compared with the prior art, additional electric heating equipment is needed for energy supply during non-illumination time, and the application can save energy consumption.

[0012] Further, the first circulating subsystem, the second circulating subsystem and the third circulating subsystem each include an outlet pipeline and an inlet pipeline, wherein two groups of soft connection pipes are arranged on the inlet pipeline, and a circulating pump, a pressure relief valve and a filter are further arranged between the two groups of soft connection pipes.

[0013] Advantages:

[0014] 1、 In the circulating system, mechanical vibration and noise will be generated when the circulating pump is running; the soft connection pipe has good flexibility and elasticity, can effectively absorb and buffer the vibration generated by the circulating pump, reduce the transmission of vibration to other parts of the pipeline system, thereby reducing the vibration and noise level of the whole system, and improving the stability and comfort of the system operation. In addition, the system will be affected by factors such as temperature and pressure during operation, and the pipeline may expand and contract due to heat, displacement, etc. The soft connection pipe can freely stretch and bend within a certain range, can compensate for the displacement of the pipeline caused by thermal expansion and contraction or installation error, avoid damage to the pipeline due to excessive stress, and prolong the service life of the pipeline.

[0015] 2. The circulating pump is positioned between the two sets of flexible connecting pipes. This arrangement allows the flexible connecting pipes to fully perform their functions of shock absorption and displacement compensation. The circulating pump is a key component that provides power to the system. It will generate significant vibration and impact during operation. By installing flexible connecting pipes before and after it, the vibration of the circulating pump can be effectively isolated, preventing it from affecting other pipes and equipment.

[0016] 3. When the pressure in the system exceeds the set value, the pressure relief valve will automatically open to release the excess pressure and protect the pipelines and equipment in the system from high pressure damage; while the flexible connection pipe can buffer the pressure fluctuations generated when the pressure relief valve opens and closes, ensuring the smooth progress of the pressure relief process and avoiding pressure shocks from damaging other components.

[0017] 4. The function of the filter is to filter impurities and particles in the liquid, prevent these impurities from entering the circulating pump and other equipment, avoid wear and blockage of the equipment, and extend the service life of the equipment.

[0018] Furthermore, control valves are installed on both inlet and outlet pipes of the heat exchanger and energy storage tank.

[0019] Beneficial effects: When a component in the system malfunctions, such as a heat exchanger leak or abnormal pressure in the energy storage tank, the control valves on both sides of the component can be quickly shut off. This prevents the malfunction from spreading and avoids contamination or abnormal media affecting other components. It also makes it easier for maintenance personnel to inspect and repair the malfunctioning component, reducing maintenance difficulty and cost, and minimizing system downtime.

[0020] Furthermore, control valves are installed on both the inlet and outlet pipes of the solar thermal collector, as well as on the inlet and outlet pipes of the energy consumption end.

[0021] Beneficial effects: By precisely adjusting the control valves on the solar thermal collector and the energy-consuming pipeline, the system can achieve efficient energy utilization, avoid heat waste or insufficient supply caused by unreasonable medium flow, ensure that the system can operate in the best condition under different working conditions, improve energy utilization, reduce operating costs, and facilitate maintenance.

[0022] Furthermore, a check valve is installed on the inlet pipe of each circulation subsystem.

[0023] Beneficial effects: The check valve ensures that the circulating medium flows in the specified direction, maintaining the stable operation of each circulating subsystem. During system startup and shutdown, the check valve can prevent pressure fluctuations and flow instability caused by backflow of the medium. When the system starts up, the circulating pump begins to work, and the check valve opens quickly to ensure that the medium enters the circulating system smoothly; when stopping, the check valve closes in time to prevent backflow of the medium, allowing the system to stop smoothly, reducing the impact on equipment, and extending the service life of the equipment.

[0024] Further, the photo-thermal collector assembly is composed of several series-connected trough collectors.

[0025] Beneficial effects: Multiple trough collectors are connected in series, and the medium flows through each collector in turn, continuously absorbing solar energy and gradually increasing in temperature, which can achieve heat accumulation, so that the medium eventually reaches a higher temperature to meet more energy demand. In addition, compared with a single large collector, using multiple small series-connected trough collectors has more advantages in cost control; the structure of small trough collectors is relatively simple, and the production, transportation and installation costs are lower. Moreover, when a collector fails, only the failed collector needs to be replaced, without the need to replace the entire photo-thermal collector assembly, which reduces maintenance costs and downtime and improves the economic efficiency of the system.

[0026] Further, the energy storage tank is a steam storage tank or a hot water storage tank; and the heat exchanger is an auxiliary heating type heat exchanger.

[0027] Beneficial effects: The auxiliary heating type heat exchanger refers to an electric heater or a gas heater provided in the heat exchanger for auxiliary heating, which can be used to heat the medium in the heat exchange pipe when the heat is insufficient.

[0028] Further, the photo-thermal collector assembly and the energy storage tank form a first circulation subsystem through a pipeline, the energy storage tank and the heat exchanger form a second circulation subsystem through a pipeline, and the heat exchanger and the energy utilization end form a third circulation subsystem through a pipeline.

[0029] Further, the energy storage tank is a molten salt energy storage tank, which includes a shell side and a tube side, the shell side is provided with molten salt energy storage medium, and the tube side includes a first heat exchange coil and a second heat exchange coil.

[0030] Beneficial effects:

[0031] 1. The molten salt energy storage tank uses molten salt as the energy storage medium, which has a high specific heat capacity and a high latent heat of fusion. During the operation of the photo-thermal system, the excess heat generated by the photo-thermal collector assembly during the day can be transferred to the molten salt, causing its temperature to rise and storing a large amount of sensible heat. When the temperature reaches the melting point of the molten salt, the molten salt absorbs heat and undergoes a phase change, storing a large amount of latent heat. This allows the molten salt energy storage tank to efficiently store the heat generated by solar energy, and compared with other energy storage methods, it can store more energy in the same volume, providing more stable and sustainable energy supply for the system.

[0032] 2. The presence of the molten salt energy storage tank effectively alleviates the intermittency of solar energy. During the day when the sunlight is sufficient, the heat generated by the photo-thermal collector assembly meets the current energy demand, and the excess heat is stored in the molten salt energy storage tank. At night or when the sunlight is insufficient, the energy storage tank releases the stored heat to ensure that the system can continuously and stably provide heat for the energy utilization equipment. This improves the stability and reliability of the entire photo-thermal system and reduces the interruption or instability of energy supply caused by fluctuations in solar energy.

[0033] Further, the module units are arranged in groups, and each module unit is connected in parallel to form an energy supply system, and the energy supply system is connected to the user end through a main pipe.

[0034] Further, the module units are arranged on the roof space of a building, a residence, a factory, a bath center or a hotel, and the roof space includes regular space or irregular space; in the regular space, the module units are arranged regularly, and in the irregular space, the module units are arranged irregularly.

[0035] Beneficial effects: the module units are installed on the roof space, reducing the cost of separately constructing a ground foundation or a site; moreover, the module units can be flexibly combined according to the size and shape of the roof space, without the need for large-scale customized design and production to adapt to a specific site, thereby reducing the equipment cost. In addition, since the module units are relatively concentrated on the roof, the laying length of the pipe and line is shortened, and the material cost and construction cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 a connection diagram of the light-heat system in Embodiment 1;

[0037] Figure 2 a connection diagram of the light-heat system in Embodiment 1; Figure 1 a connection diagram of the light-heat system in Embodiment 1;

[0038] Figure 3 a connection diagram of the light-heat system in Embodiment 1; Figure 1 a connection diagram of the light-heat system in Embodiment 1;

[0039] Figure 4 a connection diagram of the light-heat system in Embodiment 1;

[0040] Figure 5 a connection diagram of the light-heat system in Embodiment 1;

[0041] Figure 6 a connection diagram of the light-heat system in Embodiment 1;

[0042] Figure 7 a connection diagram of the light-heat system in Embodiment 1; DETAILED DESCRIPTION

[0043] The following will be further described in detail through specific embodiments:

[0044] The markings in the accompanying drawings include: solar thermal collector assembly 1, trough collector 11, first circulation subsystem 12, heat exchanger 2, second circulation subsystem 23, energy storage tank 3, shell side 31, first heat exchange coil 32, second heat exchange coil 33, third circulation subsystem 34, energy consumption end 4, control valve 5, flexible connection pipe 61, circulation pump 62, pressure relief valve 63, filter 64, check valve 65, main pipe 7, building roof 8, surrounding open space 9, and energy supply system 100.

[0045] Example 1

[0046] like Figure 1 As shown, a modular composite trough-type solar thermal system includes several module units used in parallel or series and energy-consuming terminals 4 connected to the module units. Specifically, this embodiment uses one module unit as an example to describe the solar thermal system in detail. Each module unit includes a solar thermal collector assembly 1, a heat exchanger 2, and an energy storage tank 3. The solar thermal collector assembly 1 is connected to the heat exchanger 2 through pipes to form a first circulation subsystem 12. The heat exchanger 2 and the energy storage tank 3 are connected through pipes to form a second circulation subsystem 23. The energy storage tank 3 and the energy-consuming terminal 4 are connected through pipes to form a third circulation subsystem 34.

[0047] like Figure 3 As shown, in this embodiment, the solar thermal collector assembly 1 consists of several trough collectors 11 connected in series. Specifically, 20 trough collectors 11 form a group, constituting a 24KW collector module. In other embodiments besides this one, different numbers of trough collectors 11 can be set for each group of solar thermal collector assemblies 1 as needed. Specifically, the energy storage tank 3 can be a steam storage tank or a hot water storage tank; this embodiment uses a hot water storage tank as an example. The heat exchanger 2 is an auxiliary heat exchanger, that is, an electric auxiliary heater or a gas furnace is added to the heat exchanger 2, and electricity or gas is used to supplement the heat exchange tubes when needed, according to user resources.

[0048] The first circulation subsystem 12, the second circulation subsystem 23, and the third circulation subsystem 34 all include outlet pipes and inlet pipes, such as... Figure 2 As shown, two sets of flexible connecting pipes 61 are installed on the inlet pipe, and a circulating pump 62, a pressure relief valve 63, and a filter 64 are installed between the two sets of flexible connecting pipes 61; a check valve 65 is also installed on the inlet pipe downstream of the circulating pump 62. Control valves 5 are installed on both inlet and outlet pipes of the heat exchanger 2 and the energy storage tank 3; control valves 5 are also installed on the inlet and outlet pipes of the solar thermal collector, and control valves 5 are also installed on the inlet and outlet pipes of the energy consumption end 4.

[0049] In use, the heat exchange medium circulates in the first circulation subsystem 12, exchanges heat at the heat exchanger 2, transfers heat to the medium in the second circulation subsystem 23, and heats the medium, which is water in this embodiment; the heated water is stored in the hot water storage tank and delivered to the energy utilization end 4 through the third circulation subsystem 34 for heat utilization.

[0050] Embodiment Two

[0051] The difference between this embodiment and Embodiment One is that, as shown in Figure 4 the light heat collector assembly 1 and the energy storage tank 3 form the first circulation subsystem 12 through a pipeline, the energy storage tank 3 and the heat exchanger 2 form the second circulation subsystem 23 through a pipeline, and the heat exchanger 2 and the energy utilization end 4 form the third circulation subsystem 34 through a pipeline. Specifically, the energy storage tank 3 can be a molten salt energy storage tank or a heat conducting oil storage tank, and this embodiment will be described in detail taking the molten salt energy storage tank as an example.

[0052] The molten salt energy storage tank includes a shell side 31 and a tube side, the shell side is provided with molten salt energy storage medium, and the tube side includes a first heat exchange coil 32 and a second heat exchange coil 33; the first heat exchange coil 32 is connected with the light heat collector assembly 1 through a pipeline as the first circulation subsystem 12, and the second heat exchange coil 33 is connected with the heat exchanger 2 through a pipeline as the second circulation subsystem 23. The presence of the molten salt energy storage tank effectively alleviates the intermittency problem of solar energy; during the day when the sunlight is sufficient, the heat generated by the light heat collector assembly 1 is used to meet the current energy utilization demand, and the excess heat is stored in the energy storage tank 3; at night or when the sunlight is insufficient, the energy storage tank 3 releases the stored heat to ensure that the system continuously and stably supplies heat to the energy utilization equipment.

[0053] In use, the heat exchange medium circulates in the first circulation subsystem 12, absorbs the heat of solar energy, and stores part of the heat in the energy storage tank 3, and transfers the other part of the heat to the medium in the second circulation subsystem 23, which transfers the heat to the third circulation subsystem 34 through the heat exchanger 2 and delivers to the energy utilization end 4 for immediate utilization; when it is not sunny, the first circulation subsystem 12 is closed, and the second circulation subsystem 23 and the third circulation subsystem 34 are opened, the energy storage tank 3 releases the stored heat to supply heat to the energy utilization end equipment. When the heat in the energy storage tank 3 is insufficient, the electric heating or gas in the heat exchanger can be started for auxiliary heating.

[0054] Embodiment Three

[0055] The difference between this embodiment and Embodiment Two is that the module unit is provided in multiple groups, and each module unit is connected in parallel to form the energy supply system 100, and the energy supply system 100 is connected with the energy utilization end 4 through a main pipe 7. Specifically, as shown in Figure 5As shown in the figure, the embodiment sets three groups of module units as an example for illustration; the three groups of module units all include the light-heat collector assembly 1, the energy storage tank 3, and the heat exchanger 2, wherein the inlet pipeline and the outlet pipeline of the three groups of heat exchangers 2 are connected with the main pipe 7 respectively.

[0056] Embodiment four

[0057] The difference between the embodiment and the embodiment three is that the module units are arranged on the roof space of a building, a residence, a factory, a bathing center or a hotel, and the roof space includes a regular space or an irregular space; in the regular space, the module units can be regularly arranged, and in the irregular space, the module units are irregularly arranged. By arranging the module units on the roof space, the cost of separately constructing a ground foundation or a site is reduced; moreover, the module units can be flexibly combined according to the size and shape of the roof space, without the need of large-scale customized design and production to adapt to a specific site, so that the equipment cost is reduced. In addition, since the module units are relatively concentrated on the roof, the laying length of the pipeline and the line is shortened, and the material cost and the construction cost are reduced.

[0058] Specifically as Figure 6 shown in the figure, the embodiment shows a schematic diagram of regularly arranging the module units in the regular space of the building roof 8, wherein the light-heat collector assemblies 1 in the module units are distributed on the top surface of the building roof 8. As Figure 7 shown in the figure, when the space of the building roof 8 is insufficient, a part of the heat collection module units can also be arranged on the surrounding land 9 of the building, and the module units on the building roof 8 are connected in series and parallel through the pipeline, so as to achieve a distributed arrangement effect, while realizing the effective use of space, the energy demand is fully met.

[0059] The above is only an embodiment of the utility model, and the utility model is not limited to the field involved in the embodiment. The specific structure and characteristics known in the art are not described in detail. It should be noted that, for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection scope of the utility model. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A modular composite trough-type solar thermal system, characterized in that, It includes several modular units used in parallel or series and energy-consuming terminals connected to the modular units. Each modular unit includes a solar thermal collector assembly, a heat exchanger, and an energy storage tank. The solar thermal collector assembly is connected to the heat exchanger through pipes to form a first circulation subsystem. The heat exchanger and the energy storage tank are connected through pipes to form a second circulation subsystem. The energy storage tank and the energy-consuming terminal are connected through pipes to form a third circulation subsystem.

2. The modular composite trough-type solar thermal system according to claim 1, characterized in that: The first, second, and third circulation subsystems all include an outlet pipeline and an inlet pipeline. The inlet pipeline is equipped with two sets of flexible connecting pipes, and a circulation pump, a pressure relief valve, and a filter are installed between the two sets of flexible connecting pipes.

3. The modular composite trough-type solar thermal system according to claim 2, characterized in that: Control valves are installed on both inlet and outlet pipes of the heat exchanger and energy storage tank; control valves are also installed on both inlet and outlet pipes of the solar thermal collector, and on both inlet and outlet pipes of the energy consumption end.

4. The modular composite trough-type solar thermal system according to claim 3, characterized in that: Each circulation subsystem is equipped with a check valve on its inlet pipe.

5. A modular composite trough-type solar thermal system according to claim 4, characterized in that: The solar thermal collector assembly consists of several trough collectors connected in series.

6. A modular composite trough-type solar thermal system according to claim 5, characterized in that: The energy storage tank is a steam storage tank or a hot water storage tank; the heat exchanger is an auxiliary heat exchanger.

7. A modular composite trough-type solar thermal system according to any one of claims 1-6, characterized in that: The solar thermal collector assembly forms a first circulation subsystem with the energy storage tank via pipes. The energy storage tank and the heat exchanger are connected via pipes to form a second circulation subsystem. The heat exchanger and the energy-consuming end are connected via pipes to form a third circulation subsystem.

8. A modular composite trough-type solar thermal system according to claim 7, characterized in that: The energy storage tank is a molten salt energy storage tank, which includes a shell side and a tube side. The shell side is filled with molten salt energy storage medium, and the tube side includes a first heat exchange coil and a second heat exchange coil; or the energy storage tank is a heat transfer oil storage tank.

9. A modular composite trough-type solar thermal system according to claim 8, characterized in that: The module units are configured in multiple groups, and each module unit is connected in parallel to form an energy supply system. The energy supply system is connected to the user terminal through a main pipe.

10. A modular composite trough-type photothermal system according to claim 9, characterized in that: The modular units are installed on the rooftop space of buildings, residences, factories, bath centers, or hotels. The rooftop space can be regular or irregular. In a regular space, several modular units are arranged regularly, while in an irregular space, several modular units are arranged irregularly.

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