Wind-solar complementary clean heat supply system

Abstract

The utility model discloses a wind-solar complementary clean heat supply system which comprises a photo-thermal heat collection device, a wind power generation system, a mains supply device, a heat exchanger and a heat storage module. The heat storage module is connected with the hot side of the heat exchanger in parallel, and the cold side of the heat exchanger is connected with the hot end. A heat collecting pipe of the photo-thermal heat collecting device is connected with the energy storage module and the heat side of the heat exchanger to form working medium circulation. The wind power generation system and the mains supply device are respectively connected with the heat storage module; according to the wind-solar complementary clean heat supply system, stable heat energy supply can be achieved, and the whole system is environmentally friendly, safe, controllable and high in economical efficiency and has high use value and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy power generation, in particular to a clean heating system with complementary wind and solar energy. Background Technique

[0002] Driven by the "30 60 dual-carbon" goal, it is an inevitable trend to build a new energy system with clean energy as the main body. Among the forms of energy terminal consumption, heat energy accounts for 50% of the terminal energy consumption demand. Solar thermal energy and wind power are environmentally friendly, economical, safe and efficient green energy products. It is a practical and effective way to solve the heating problems of the vast majority of residents' living, industrial and agricultural production in China through solar thermal and wind power systems. It can replace traditional coal-fired and gas-fired boilers on a large scale, solve the problems of high pollution, high energy consumption and poor operation flexibility during heating, effectively reduce the operation cost, and obtain good social and economic benefits.

[0003] Traditional energy can be adjusted according to demand, while solar thermal energy can only generate heat during the day and on sunny days, and the wind turbine can only generate electricity when the wind force meets the requirements. Moreover, the heat (electricity) output varies with meteorological factors at any time. This intermittency and instability directly lead to uncontrollability. Due to these adverse factors, many technical problems are encountered when using solar thermal energy or wind energy alone for reliable heating economically.

[0004] The heat supply of the solar thermal system is concentrated in the period with sufficient daylight during the day, and it cannot provide heat at night. Moreover, the output power fluctuates greatly affected by the light intensity. Relying solely on the solar thermal system to meet the terminal heat demand often requires increasing the heat collection area, and there are many limitations in the application scenarios. The output voltage of the wind turbine fluctuates within a large range. Off-grid generators often cannot be directly connected to the load, but charge the battery through a rectifier, store the electric energy, and supply power to the load through the battery. The storage and reuse of electric energy increase the investment cost and operation and maintenance difficulty, and also reduce the utilization rate of clean energy. Content of the Utility Model

[0005] Aiming at the problems of intermittency and volatility of existing solar thermal energy and wind power, which lead to unstable energy supply, a clean heating system with complementary wind and solar energy is provided. By integrating solar thermal energy and wind power, it can provide a stable and environmentally friendly energy supply for the load.

[0006] The utility model is realized through the following technical solutions:

[0007] A clean heating system with complementary wind and solar energy includes a solar thermal collector device, a wind power generation system, a mains power device, a heat exchanger and a heat storage module;

[0008] The heat storage module is connected in parallel with the hot side of the heat exchanger, and the cold side of the heat exchanger is connected to the heat using end;

[0009] The heat collection pipes of the solar thermal collector are respectively connected to the energy storage module and the hot side of the heat exchanger to form a working medium circulation;

[0010] The wind power generation system and the mains power device are respectively connected to the heat storage module.

[0011] Preferably, the heat storage module includes a formulated concrete heat storage block and an electric heating device;

[0012] Pipes are buried in the heat storage module and communicated with the working medium pipes. The electric heating device is buried in the heat storage module and is respectively connected to the wind power generation system and the mains power device.

[0013] Preferably, the working medium outlet of the solar thermal collector is respectively connected to the inlet of the heat storage module and the hot side inlet of the heat exchanger through a tee pipe. The inlets of the heat storage module and the heat exchanger are respectively connected to the first pipe and the second pipe and then connected to the working medium inlet of the solar thermal collector. The first pipe and the second pipe are in parallel.

[0014] Preferably, one end of the first pipe is respectively connected to the outlet of the heat storage module and the hot side outlet of the heat exchanger, and the other end of the first pipe is connected to the working medium inlet of the solar thermal collector;

[0015] One end of the second pipe is connected to the connection end of the first pipe and the hot side outlet of the heat exchanger, and the other end is connected to the working medium inlet of the solar thermal collector.

[0016] Preferably, a first valve group is provided at the outlet of the tee pipe, a second valve group is provided on the first pipe, and a third valve group is provided on the second pipe. The first valve group, the second valve group and the third valve group are combined to control the working states of the heat storage module and the hot side of the heat exchanger.

[0017] Preferably, the first valve group includes a first valve, a second valve and a third valve;

[0018] The first valve is provided at the inlet of the tee pipe and is connected to the working medium outlet of the solar thermal collector. The second valve is provided at the first outlet of the tee pipe and is connected to the inlet of the heat storage module. The third valve is provided at the second outlet of the tee pipe and is connected to the hot side inlet of the heat exchanger.

[0019] Preferably, the second valve group includes a fourth valve, a fifth valve, a sixth valve and a seventh valve;

[0020] The fourth valve is provided at the outlet of the heat storage module, the seventh valve is provided at the hot side outlet of the heat exchanger, the fifth valve is provided on the first pipe and is located between the fourth valve and the seventh valve, and the sixth valve is provided at the outlet of the second pipe and is connected to the inlet of the vacuum heat collection pipe.

[0021] Preferably, the third valve group includes an eighth valve and a ninth valve, and an oil pump is arranged on the second pipeline;

[0022] The eighth valve and the ninth valve are respectively arranged on the second pipeline and on both sides of the oil pump.

[0023] Preferably, the solar thermal collector device includes a trough-shaped concentrating reflector and a vacuum heat collecting tube;

[0024] The vacuum heat collecting tube is arranged on the top of the trough-shaped concentrating reflector and at the optical focal line of the trough-shaped concentrating reflector.

[0025] Preferably, the trough-shaped concentrating reflector is connected to a tracking device for adjusting the angle of the trough-shaped concentrating reflector to track the position of the sun.

[0026] Compared with the prior art, the utility model has the following beneficial technical effects:

[0027] A clean heating system with wind-solar complementary provided by the utility model connects a solar thermal collector device, a wind heating device and the commercial power in parallel to an energy supply system. The energy supply system is composed of an energy storage module and a heat exchanger. When there is sufficient sunlight, the heat collected by the solar thermal system can meet the use of the terminal load; when there is surplus heat, the heat collected by the solar thermal system can be stored in the heat storage module; when there is insufficient sunlight or the solar thermal system does not meet the heat demand, wind power generation is used as a supplementary way of heat supply. Through an electric auxiliary heating device, electric energy is converted into heat energy and provided to the terminal load; in addition, the heat generated by wind power generation can also be stored in the heat storage module and released for use when there is a heat demand. In case of extreme weather, the commercial power can be used as the way of energy supply. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the clean heating system of the utility model;

[0029] Figure 2 is a schematic structural diagram of the solar thermal system of the utility model;

[0030] Figure 3 is a schematic structural diagram of the wind trough-shaped solar thermal collector field of the utility model;

[0031] Figure 4 is a structural diagram of the wind power generation system and the commercial power supply of the utility model.

[0032] In the figure: 1 - trough solar thermal collector field, 2 - wind power generation system, 3 - mains power supply, 4 - first valve, 5 - second valve, 6 - third valve, 7 - heat storage module, 8 - heat exchanger, 9 - fourth valve, 10 - fifth valve, 11 - sixth valve, 12 - seventh valve, 13 - eighth valve, 14 - oil pump, 15 - ninth valve, 100 - vacuum heat collecting tube, 200 - trough type concentrating reflector, 300 - steel structure support, 400 - sun-tracking system. Detailed implementation mode

[0033] The following further describes the present utility model in detail with reference to the accompanying drawings, which is an explanation rather than a limitation of the present utility model.

[0034] Refer to Figures 1-4 , a clean heating system combining wind and solar energy, comprising a solar thermal collecting device, a wind power generation system 2, a mains power supply 4, a heat exchanger 8 and a heat storage module 7.

[0035] The heat storage module is connected in parallel with the hot side of the heat exchanger 8, and the cold side of the heat exchanger is connected to the heat-using end;

[0036] The heat collecting tubes of the solar thermal collecting device are respectively connected to the energy storage module and the hot side of the heat exchanger to form a working medium circulation;

[0037] The wind power generation system 2 and the mains power supply 4 are respectively connected to the heat storage module.

[0038] Refer to Figure 1 , the solar thermal collecting device is a trough solar thermal collector field 1, which includes a vacuum heat collecting tube 100, a trough type concentrating reflector 200, a steel structure support 300 and a sun-tracking system 400.

[0039] The lower end of the steel structure support 300 is fixed on the foundation, the trough type concentrating reflector 200 is arranged at the upper end of the steel structure support 300, the sun-tracking system 400 is connected to the trough type concentrating reflector 200 for controlling the angle of the trough type concentrating reflector 200 to make it sun-tracking so as to maximize the absorption of solar energy, the vacuum heat collecting tube 100 is arranged at the concentrating focus of the trough type concentrating reflector 200 and connected to the steel structure support 300, and the reflected light of the trough type concentrating reflector 200 is concentrated on the vacuum heat collecting tube 100 to heat the heat transfer medium therein.

[0040] The outlet of the vacuum heat collecting tube 100 is respectively connected to the inlet of the energy storage module and the inlet of the hot side of the heat exchanger, and the outlet of the energy storage module and the outlet of the hot side of the heat exchanger are connected to the inlet of the vacuum heat collecting tube 100, so that the working medium on the hot side of the heat exchanger forms a circulation between the vacuum heat collecting tube 100 and the hot side of the heat exchanger.

[0041] This solar thermal collector device heats the heat-conducting medium in the vacuum heat pipe by reflecting and focusing sunlight, and transfers the heat to the heat exchanger through pipelines. The heat exchanger exchanges heat with water to generate steam or hot water to meet the heat demand at the end.

[0042] The trough-shaped concentrating mirror is the frontmost component of the solar thermal collector device. Its main function is to capture sunlight and reflect and focus it onto a slender straight line. This design can effectively increase the light intensity per unit area, thereby improving the conversion efficiency of solar energy. The trough-shaped mirror is usually composed of multiple high-precision mirror surfaces, which can accurately track the position of the sun to ensure that sunlight is always accurately reflected to the target position.

[0043] The vacuum heat pipe is located near the focus of the trough-shaped concentrating mirror and is used to receive the focused sunlight and convert it into heat energy. The heat pipe usually contains a working medium (such as water, heat-conducting oil, etc.). After receiving the high-heat sunlight, the temperature of the working medium rises, thus realizing the collection and transfer of heat energy. The vacuum design effectively reduces heat loss and improves the heat collection efficiency. In addition, the heat pipe also has good heat insulation performance and corrosion resistance to cope with the complex and changeable outdoor environment.

[0044] The steel structure support is the support structure of the entire device, responsible for carrying and fixing the trough-shaped concentrating mirror, the vacuum heat pipe, and other auxiliary equipment. The design of the support needs to consider factors such as the stability of the structure, wind pressure resistance, corrosion resistance, and ease of installation and maintenance. A sturdy support is the basis for ensuring the long-term stable operation of the system.

[0045] The sun-tracking system is a key component to ensure that the trough-shaped concentrating mirror can accurately track the position of the sun. The mirror field angle is adjusted according to the sun's angle at different times in the location. In this embodiment, a centralized layout scheme of solar thermal and wind power is adopted, and wind power towers are arranged in the mirror field gap of the trough-shaped heat collection system. Therefore, a single-axis tracking system is used.

[0046] The working principle of the solar thermal collector device is as follows:

[0047] 1. When there is sufficient sunlight during the day, the solar thermal collector mirror field tracks the sun's angle in real time through the tracking system, reflects and focuses the sunlight to heat the heat-conducting medium in the heat pipe, and transfers the heat to the heat exchanger through pipelines. The heat exchanger exchanges heat with water to generate steam or hot water to meet the heat demand at the end.

[0048] 2. When there is sufficient sunlight intensity and the normal heat use at the end can be guaranteed, the surplus heat can be stored in the heat storage module. First, it can avoid the impact of output heat fluctuations on the heat-using end. Second, heat storage improves the utilization rate of solar thermal energy and ensures the continuity of the heat source at the same time.

[0049] 3. When there is insufficient sunlight, the heat stored in the heat storage module can be extracted to supplement the heat demand.

[0050] In some embodiments, the heat storage module includes a formulated concrete heat storage block and an electric heating device. A pipeline is buried in the heat storage block and communicated with the working medium pipeline. The electric heating device is buried in the formulated concrete heat storage block, and the electric heating device is respectively connected to the wind power generation system 2 and the mains power supply 4.

[0051] The electric heating device is an electric heater.

[0052] In some embodiments, the outlet of the vacuum heat collecting tube 100 is respectively connected to the inlet of the heat storage module 7 and the hot side inlet of the heat exchanger through a three-way pipeline. The inlets of the heat storage module 7 and the heat exchanger are respectively connected to the first pipeline and the second pipeline and connected to the inlet of the vacuum heat collecting tube 100, and the first pipeline and the second pipeline are in parallel.

[0053] A first valve group is arranged at the outlet of the three-way pipeline, a second valve group is arranged on the first pipeline, and a third valve group is arranged on the second pipeline. The first valve group, the second valve group and the third valve group are used to control the working states of the heat storage module and the hot side of the heat exchanger. Through the combined control of the three valve groups, the heat storage module stores or releases heat. When the hot side of the heat exchanger is closed, the heat storage module stores heat; when the heat storage module is communicated with the hot side of the heat exchanger, heat is released.

[0054] The first valve group includes a first valve 4, a second valve 5 and a third valve 6. The first valve 4 is arranged at the inlet of the three-way pipeline and connected to the inlet of the vacuum heat collecting tube 100. The second valve 5 is arranged at the first outlet of the three-way pipeline and connected to the inlet of the heat storage module. The third valve 6 is arranged at the second outlet of the three-way pipeline and connected to the hot side inlet of the heat exchanger.

[0055] One end of the first pipeline is respectively connected to the outlet of the heat storage module and the hot side outlet of the heat exchanger, and the other end of the first pipeline is connected to the inlet of the vacuum heat collecting tube 100.

[0056] The second valve group includes a fourth valve 9, a fifth valve 10, a sixth valve 11 and a seventh valve 12; the fourth valve 9 is arranged at the outlet of the heat storage module, the seventh valve 12 is arranged at the hot side outlet of the heat exchanger, the fifth valve 10 is arranged on the first pipeline and located between the fourth valve 9 and the seventh valve 12, and the sixth valve 11 is arranged at the outlet of the second pipeline and connected to the inlet of the vacuum heat collecting tube.

[0057] One end of the second pipeline is connected to the connection end of the first pipeline and the hot side outlet of the heat exchanger, and the other end is connected to the inlet of the vacuum heat collecting tube. An oil pump 14 is arranged on the second pipeline.

[0058] The third valve group includes an eighth valve 13 and a ninth valve 15. The eighth valve 13 and the ninth valve 15 are respectively arranged on the second pipeline and located on both sides of the oil pump, and the eighth valve 13 is located on the side close to the vacuum heat collecting tube.

[0059] The working medium on the cold side of the heat exchanger is water. After heat exchange and temperature rise, it forms steam and is supplied to users. After heat exchange with users, it returns to the cold side of the heat exchanger through the water pump 12 and circulates.

[0060] The working principle of the above-mentioned wind-solar complementary clean heating system will be elaborated in detail below.

[0061] 1. When heating under sufficient sunlight, open the first valve 4, the third valve 6, the seventh valve 12, the eighth valve 13 and the ninth valve 15, and close all other valves.

[0062] The vacuum heat collecting tube absorbs heat to heat the working medium. The working medium enters the hot side of the heat exchanger for heat exchange with the cold side. After the temperature drops, the working medium enters the oil pump 14 through the seventh valve 12 and the ninth valve 15, is pressurized, and then enters the vacuum heat collecting tube again through the eighth valve 13 and circulates.

[0063] 2. When there is sufficient sunlight, that is, when the heat generated by sunlight meets the heat demand and there is surplus heat, at this time, heat storage is carried out while heating. The method is as follows:

[0064] Open the first valve 4, the second valve 5, the third valve 6, the fourth valve 9, the fifth valve 10, the seventh valve 12, the eighth valve 13 and the ninth valve 15. The vacuum heat collecting tube absorbs heat to heat the working medium. After passing through the first valve 4, the hot working medium is divided into two paths, and respectively enters the heat storage module and the hot side of the heat exchanger through the second valve 5 and the third valve 6 for heat exchange. The working medium entering the heat storage module stores heat in the heat storage module. After the temperature of the heat storage module drops, the working medium passes through the fifth valve 10 and converges with the working medium whose temperature has dropped on the hot side of the heat exchanger, and then successively passes through the ninth valve 15, the oil pump 14 and the eighth valve 13 to enter the vacuum heat collecting tube and circulate.

[0065] 3. At night or in the absence of sunlight, the heat storage module is used for heating. The method is as follows:

[0066] Open the second valve 5, the third valve 6, the sixth valve 11, the seventh valve 12, the eighth valve 13 and the ninth valve 15, and close other valves;

[0067] The working medium of the heat storage module enters the hot side of the heat exchanger through the second valve 5 and the third valve 6 for heat exchange. After the temperature drops, the working medium successively passes through the seventh valve 12, the ninth valve 15, the oil pump 14, the eighth valve 13 and the sixth valve 11 to enter the heat storage module for temperature rise and circulate.

[0068] 4. Wind power heating: The electric energy generated by wind power generation is transmitted to the electric heater in the heat storage module, converts the electric energy into heat energy to supplement the solar heat source, or stores it in the heat storage module, and is extracted and utilized when there is a heat demand.

[0069] 5. Under extreme weather conditions, the mains power is used to supplement heat to meet the end - use requirements. It is also possible to convert the mains power into thermal energy during off - peak electricity hours and store it in the heat storage module, and release the heat during peak electricity hours to achieve the complementary use of wind, solar, and thermal power.

[0070] The clean heating system with wind - solar complementary includes a solar thermal system, a wind power generation system, a heat storage system, an electric auxiliary heating system, etc., realizing the diversified utilization of clean energy and having the advantages of high efficiency, stability, environmental protection, etc. The linear - focusing trough - type solar thermal collector field, which has mature technology, simple structure, and high stability and efficiency, is used for heat collection and heating, and together with heat - conducting oil as the heat - conducting and heat - storage medium, it can easily supply heat sources below 200 °C. At the same time, by adding an electric auxiliary heating and heat storage module, the problems of intermittency, instability, and uncontrollability of wind power and solar thermal energy are solved, achieving the perfect consumption of clean energy, effectively smoothing the supply process of fluctuating energy, and reducing the impact on the power grid. The system utilizes the complementarity of wind energy and solar thermal energy in time to obtain a relatively stable thermal energy output, can make full use of the light and wind resources in different regions and at different times, and realizes the maximization of resource utilization. In addition, converting wind power and mains power into thermal energy to supplement the solar thermal heating system or storing it in the heat storage module is more stable, safe, and economical for the end of the cooling and heating load compared with the electrochemical energy storage heating system. The system solves the problems of unstable and uncontrollable utilization of solar thermal energy and wind power, and forms a solution for a clean energy heating system with wind - solar complementarity.

[0071] The above content is only to illustrate the technical idea of the present utility model and cannot be used to limit the protection scope of the present utility model. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the claims of the present utility model.

Claims

1. A wind-solar hybrid clean heating system, characterized in that, It includes a solar thermal collector device, a wind power generation system, a mains power device, a heat exchanger and a heat storage module; The heat storage module is connected in parallel with the hot side of the heat exchanger, and the cold side of the heat exchanger is connected to the heat-using end; The collector tubes of the solar thermal collector device are respectively connected to the energy storage module and the hot side of the heat exchanger to form a working medium circulation; The wind power generation system and the mains power device are respectively connected to the heat storage module.

2. The clean heating system with wind-solar hybrid complementary according to claim 1, wherein, The heat storage module includes a formulated concrete heat storage block and an electric heating device; Pipes are buried in the heat storage module and communicated with the working medium pipes. The electric heating device is buried in the heat storage module and is respectively connected to the wind power generation system and the mains power device.

3. The hybrid wind-solar clean heating system according to claim 1, characterized in that, The working medium outlet of the solar thermal collector device is respectively connected to the inlet of the heat storage module and the inlet of the hot side of the heat exchanger through a three-way pipe. The inlets of the heat storage module and the heat exchanger are respectively connected to the first pipe and the second pipe and then connected to the working medium inlet of the solar thermal collector device. The first pipe and the second pipe are in parallel.

4. A hybrid wind-solar clean heating system according to claim 3, characterized in that, One end of the first pipe is respectively connected to the outlet of the heat storage module and the outlet of the hot side of the heat exchanger, and the other end of the first pipe is connected to the working medium inlet of the solar thermal collector device; One end of the second pipe is connected to the connection end of the first pipe and the outlet of the hot side of the heat exchanger, and the other end is connected to the working medium inlet of the solar thermal collector device.

5. The hybrid wind-solar clean heating system according to claim 4, wherein, A first valve group is arranged at the outlet of the three-way pipe, a second valve group is arranged on the first pipe, and a third valve group is arranged on the second pipe. The first valve group, the second valve group and the third valve group are combined to control the working states of the heat storage module and the hot side of the heat exchanger.

6. The hybrid wind-solar clean heating system according to claim 5, characterized in that, The first valve group includes a first valve, a second valve and a third valve; The first valve is arranged at the inlet of the three-way pipe and connected to the working medium outlet of the solar thermal collector device. The second valve is arranged at the first outlet of the three-way pipe and connected to the inlet of the heat storage module. The third valve is arranged at the second outlet of the three-way pipe and connected to the inlet of the hot side of the heat exchanger.

7. A hybrid wind-solar clean heating system according to claim 5, characterized in that, The second valve group includes a fourth valve, a fifth valve, a sixth valve and a seventh valve; The fourth valve is arranged at the outlet of the heat storage module, the seventh valve is arranged at the outlet of the hot side of the heat exchanger, the fifth valve is arranged on the first pipe and located between the fourth valve and the seventh valve, and the sixth valve is arranged at the outlet of the second pipe and connected to the inlet of the vacuum collector tube.

8. A hybrid wind-solar clean heating system according to claim 5, characterized in that The third valve group includes an eighth valve and a ninth valve, and an oil pump is arranged on the second pipe; The eighth valve and the ninth valve are respectively arranged on the second pipe and located on both sides of the oil pump.

9. A hybrid wind-solar clean heating system according to claim 1, wherein, The solar thermal collector device includes a trough-shaped concentrating reflector and a vacuum collector tube; The vacuum collector tube is arranged at the top of the trough-shaped concentrating reflector and located at the focal line of the trough-shaped concentrating reflector.

10. The hybrid wind-solar clean heating system according to claim 9, characterized in that, The trough-shaped concentrating reflector is connected to a tracking device for adjusting the angle of the trough-shaped concentrating reflector to track the position of the sun.

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