A hybrid heating system of wind heat pump and trough solar heat collection

Abstract

The present invention discloses a hybrid heating system of a wind-driven heat pump and a trough-type solar thermal collector, belonging to the field of heating technology. The system includes a wind-driven heat pump, a trough-type heat collecting pipe, and a three-way L-shaped ball valve; the wind-driven heat pump is used to heat a heat-conducting fluid and is connected to the three-way L-shaped ball valve via an air-heating fluid pipeline; the trough-type heat collecting pipe is used to heat a solar heat-conducting fluid and is connected to the hot fluid end of a shell-and-tube heat exchanger via a solar heat-conducting fluid pipeline; the three-way L-shaped ball valve respectively connects the cold fluid end of the shell-and-tube heat exchanger, the air-heating fluid pipeline, and the heating pipeline; when the trough-type heat collecting pipe is working, the three-way L-shaped ball valve respectively connects the heat exchanger and the air-heating fluid pipeline, and the air-heating fluid is heated by the solar heat-conducting fluid in the heat exchanger and flows to the heating pipeline; when the trough-type heat collecting pipe is not working, the three-way L-shaped ball valve respectively connects the air-heating fluid pipeline and the heating pipeline, and the air-heating fluid directly provides heat. The system of the present invention can be used in the field of heating to improve energy utilization.

Description

Technical Field

[0001] The present invention relates to the field of heating technology, and in particular to a wind heat pump and trough-type solar heat collection hybrid heating system. Background Art

[0002] Wind heat pumps are a revolutionary clean energy technology that can replace coal-fired boilers for heating. my country boasts abundant wind energy resources, and wind-powered heating has high energy efficiency, low wind quality requirements, and strong adaptability to wind speed fluctuations. Therefore, wind heat pumps have great potential for application in my country. Wind-powered heating can be achieved by using existing wind turbines to generate electricity and then use it in electric boilers, or by using wind turbines to directly drive heat pumps. The primary energy utilization rate for the former is ηhp = ηw × ηT × ηG × ηC × ηM × COP = 42% COP; the primary energy utilization rate for the latter is ηwh = ηw × ηT1 × COP = 57% COP, significantly improving efficiency while reducing costs. However, due to significant temporal variations in wind speed, wind speed instability can lead to significant fluctuations in heating performance. Furthermore, wind-powered heat pumps have limited power, and due to size constraints, scattered fan placement and low space utilization lead to poor heating performance and energy efficiency. Enabling wind-powered heat pumps to provide stable and high-powered heat is a hot topic and a challenge.

[0003] Currently, solar energy is primarily used for power generation, which is inefficient. Using it for heating would further reduce the energy efficiency of heating. Furthermore, solar energy is time-sensitive, being usable only during daytime and significantly affected by weather. Consequently, solar energy is also subject to instability. Developing efficient and stable solar energy utilization is both a hot topic and a challenge. Summary of the Invention

[0004] The object of the present invention is to provide a hybrid heating system of a wind heat pump and a trough-type solar thermal collector to solve at least one of the above-mentioned problems existing in the existing heating technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a wind heat pump and trough-type solar thermal collector hybrid heating system, the wind heat pump and trough-type solar thermal collector hybrid heating system comprising a wind heat pump, a trough-type heat collecting pipe and a three-way L-shaped ball valve; the wind heat pump is used to heat the heat transfer fluid, and is connected to the three-way L-shaped ball valve through an air-heat fluid pipeline; the trough-type heat collecting pipe is used to heat the solar heat transfer fluid, and is connected to the hot fluid end of a shell and tube heat exchanger through a solar heat transfer fluid pipeline; the three-way L-shaped ball valve is respectively connected to the cold fluid end of the shell and tube heat exchanger, the wind-heat fluid pipeline and the heating pipeline; when the trough-type heat collecting pipe is working, the three-way L-shaped ball valve is respectively connected to the heat exchanger and the wind-heat fluid pipeline, the wind-heat fluid is heated by the solar heat transfer fluid in the heat exchanger and flows to the heating pipeline; when the trough-type heat collector is not working, the three-way L-shaped ball valve is respectively connected to the wind-heat fluid pipeline and the heating pipeline, and the wind-heat fluid directly supplies heat.

[0006] Furthermore, the fan is mechanically connected to the heat pump compressor via a gearbox.

[0007] Furthermore, the gearbox and the compressor are arranged inside the fan, and the compressors in different fans are connected in parallel with each other through pipelines and are connected to the three-way L-shaped ball valve.

[0008] Furthermore, the trough collectors are arranged in the vacant positions between the fans, and the number is one or more.

[0009] Furthermore, when there are multiple trough collectors, the trough collectors are arranged in parallel.

[0010] Furthermore, the solar heat transfer fluid pipes of different trough collectors are connected in parallel to one pipe, which leads to the hot fluid port of the shell and tube heat exchanger.

[0011] Furthermore, the heating pipe leads to the heating end, the heating end is connected to the throttle valve, the throttle valve is connected to the ground heat absorption pipe, and leads to the compressor; the compressor, the heating end, the throttle valve and the ground heat absorption pipe together constitute a heat pump.

[0012] The beneficial effects of the present invention are as follows: since solar energy is generally stronger during the day and wind energy is stronger at night, the morning and evening hours complement each other. Furthermore, the high specific heat capacity of the solar heat collector offsets the negative impact of wind fluctuations through heat exchange. This system effectively solves the problem of unstable heating from wind-heating units. Furthermore, wind-heating units have limited power and low space utilization for fans. By deploying a solar heat collector, space utilization and heating power are increased. Furthermore, wind and light energy are directly converted into heat energy, resulting in high energy utilization. Furthermore, a three-way L-shaped ball valve can regulate the flow of the wind-heating fluid according to weather and time of day, maximizing thermal energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention may be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the figures to designate the same or similar parts. The accompanying drawings, together with the following detailed description, are incorporated in and form a part of this specification and serve to further illustrate the preferred embodiments of the present invention and to explain the principles and advantages of the present invention.

[0014] Figure 1 The system structure diagram of a wind heat pump and trough solar heat collection hybrid heating system of the present invention is shown;

[0015] Figure 2 The internal structure of the fan is shown;

[0016] Figure 3 Shows a working state of a three-way L-type ball valve;

[0017] Figure 4 Another working state of the three-way L-type ball valve is shown.

[0018] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity only and are not necessarily drawn to scale. For example, the dimensions of certain elements in the drawings may be enlarged or reduced relative to other elements to facilitate a better understanding of the embodiments of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] An embodiment of the present invention provides a hybrid heating system of a wind heat pump and a trough-type solar thermal collector, comprising a wind heat pump, a trough-type heat collecting pipe and a three-way L-shaped ball valve; the wind heat pump is used to heat a heat-transfer fluid, and is connected to the three-way L-shaped ball valve through a wind-heat fluid pipeline; the trough-type heat collecting pipe is used to heat a solar heat-transfer fluid, and is connected to the hot fluid end of a shell-and-tube heat exchanger through a solar heat-transfer fluid pipeline; the three-way L-shaped ball valve is respectively connected to the cold fluid end of the shell-and-tube heat exchanger, the wind-heat fluid pipeline and the heating pipeline; when the trough-type heat collecting pipe is working, the three-way L-shaped ball valve is respectively connected to the heat exchanger and the wind-heat fluid pipeline, and the wind-heat fluid is heated by the solar heat-transfer fluid in the heat exchanger and flows to the heating pipeline; when the trough-type heat collector is not working, the three-way L-shaped ball valve is respectively connected to the wind-heat fluid pipeline and the heating pipeline, and the wind-heat fluid directly provides heat.

[0021] The following combination Figure 1 An embodiment of the above-mentioned wind heat pump and trough solar thermal collection hybrid heating system is described below.

[0022] like Figure 1 As shown, a wind heat pump and trough type solar heat collection hybrid heating system of the present invention includes a wind heat pump, a trough type heat collection pipe 2 and a three-way L-shaped ball valve 4.

[0023] The wind heat pump is used to heat the heat transfer fluid and is connected to the three-way L-shaped ball valve through the wind-heat fluid pipeline; the trough-type heat collecting pipe is used to heat the solar heat transfer fluid and is connected to the hot fluid end of the shell and tube heat exchanger 3 through the solar heat transfer fluid pipeline; the three-way L-shaped ball valve is respectively connected to the cold fluid end of the shell and tube heat exchanger, the wind-heat fluid pipeline and the heating pipeline; when the trough-type heat collecting pipe is working, the three-way L-shaped ball valve is respectively connected to the heat exchanger and the wind-heat fluid pipeline, and the wind-heat fluid is heated by the solar heat transfer fluid in the heat exchanger and flows to the heating pipeline; when the trough-type heat collecting pipe is not working, the three-way L-shaped ball valve is respectively connected to the wind-heat fluid pipeline and the heating pipeline, and the wind-heat fluid directly provides heat.

[0024] As an example, the fan 1 is mechanically connected to the heat pump compressor via a gearbox.

[0025] As an example, the gearbox and the compressor are arranged inside the fan 1, and the compressors in different fans are connected in parallel with each other through pipelines and connected to the three-way L-type ball valve.

[0026] For example, the gearbox and compressor are located inside the fan. The compressors in different fans are connected in parallel via pipes to a single pipe connected to a three-way L-shaped ball valve. The pipe shape can be, but is not limited to, a hollow cylinder. The cross-sectional size and shape of the pipes for the compressors in different fans are the same. The total internal cross-sectional area of ​​the pipe must be no less than the sum of the cross-sectional areas of the individual pipes.

[0027] As an example, the trough collectors are arranged in the vacant positions between the fans, and the number is one or more.

[0028] As an example, when there are multiple trough collectors, the trough collectors are arranged in parallel but not limited to the parallel arrangement.

[0029] As an example, the solar heat transfer fluid pipes of different trough collectors are connected in parallel to one pipe, which leads to the hot fluid port of the shell and tube heat exchanger.

[0030] For example, the solar thermal fluid pipes of different trough collectors are connected in parallel to a single pipe that leads to the hot fluid port of a shell-and-tube heat exchanger. The pipe can be shaped like a hollow cylinder, but is not limited to a hollow cylinder. The cross-sectional size and shape of the solar thermal fluid pipes of different trough collectors are the same. The internal cross-sectional area of ​​the total pipe is no less than the sum of the cross-sectional areas of the individual pipes.

[0031] Furthermore, the heating pipe leads to the heating end 6, the heating end is connected to the throttle valve, the throttle valve is connected to the ground heat absorption pipe, and leads to the compressor; the compressor, the heating end, the throttle valve and the ground heat absorption pipe together constitute a heat pump.

[0032] Next, combine Figure 1 A preferred embodiment of the present invention is described.

[0033] Figure 1 The system structure diagram of the wind heat pump and trough solar thermal hybrid heating system is shown. Figure 1 As shown, the system diagram includes: a fan 1, a trough collector 2, a shell and tube heat exchanger 3, a three-way L-shaped ball valve 4, a throttling device 5, and a heating end 6. Figure 2 The internal structure of the fan is shown in detail, including blades 21, hub 22, speed increaser 23, and compressor 24. Figure 3 and Figure 4 Two working states of the three-way L-shaped ball valve are shown respectively, including: wind-heat fluid port 31, heat exchanger port 32, and heating port 33. Figure 2 (a) shows a front view of the fan, (b) shows a right view of (a), and (c) shows a bottom view of (a).

[0034] The working process and principle of the embodiment of the present invention are introduced below to facilitate understanding of the advantages of the present invention. When the trough type heat collecting pipe is working, the three-way L-shaped valve connects the shell and tube heat exchanger and the wind-heat fluid pipeline. The fan drives the compressor through the gearbox to compress the wind-heat fluid into a high-temperature fluid, and then flows to the shell and tube heat exchanger. The trough type heat collector heats the fluid in the pipe by collecting sunlight, and then the fluid flows to the shell and tube heat exchanger to heat the wind-heat fluid. The wind-heat fluid flows to the heating end, cools down, and then passes through the throttle valve to become a low-temperature fluid, absorbs surface heat and flows to the compressor. When the trough type heat collecting pipe is not working, the three-way L-shaped ball valve connects the wind-heat fluid pipeline and the heating pipeline, and the wind-heat fluid directly provides heat without losing heat energy through the heat exchanger.

[0035] It can be seen from the above working process that the hybrid heating system of wind heat pump and trough solar thermal collection according to the embodiment of the present invention can bring the following technical advantages: on the basis of wind heat, combined with solar thermal collection, the disadvantage of unstable wind heat supply is solved. Solar energy is strong during the day, and wind energy is relatively stronger at night, which complement each other in time. At the same time, the stable solar energy and solar heat transfer fluid during the day can balance the wind heat power fluctuations caused by unstable wind power. The trough heat accumulator is arranged between the fans, which improves the space utilization on the one hand and increases the heating power on the other hand. The three-way L-type ball valve can adjust the direction of the wind heat fluid at any time to avoid the waste of heat energy.

[0036] In summary, the present invention provides a hybrid heating system of a wind heat pump and a trough-type solar thermal collector. It includes: a wind heat pump, a wind-heated heat-conducting fluid pipeline, a trough-type heat collecting pipe, a solar thermal fluid pipeline, a shell and tube heat exchanger, and a three-way L-shaped ball valve. The wind heat pump is connected to the wind-heated heat-conducting fluid pipeline to circulate the fluid heated by the heat pump. The pipeline is connected to the three-way L-shaped ball valve. The three-way L-shaped ball valve is connected to the shell and tube heat exchanger and the heating pipeline below. The hot fluid port of the shell and tube heat exchanger is connected to the trough-type solar thermal collector pipeline, and the cold fluid port is connected to the three-way L-shaped pipeline and the heating pipeline, which heats the wind-heated fluid and guides it to the heating pipeline. According to the technical solution of the present invention, it can effectively solve the problem of unstable heating of the wind-heating unit, improve the heating power and space utilization of the wind-heating unit, and at the same time have extremely high energy utilization.

[0037] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wind heat pump and trough solar heat collection hybrid heating system, characterized in that: The wind heat pump and trough type solar heat collection hybrid heating system includes a wind heat pump, a trough type heat collection pipe and a three-way L-shaped ball valve; The wind heat pump is used to heat the heat transfer fluid and is connected to the three-way L-shaped ball valve through the wind heat fluid pipeline; The trough-type heat collecting pipe is used to heat the solar heat transfer fluid and is connected to the hot fluid end of the shell and tube heat exchanger through the solar heat transfer fluid pipeline; The three-way L-shaped ball valve is respectively connected to the cold fluid end of the shell and tube heat exchanger, the air and hot fluid pipeline and the heating pipeline; When the trough heat collecting pipe is working, the three-way L-shaped ball valve connects the shell and tube heat exchanger and the wind-heat fluid pipeline respectively, and the wind-heat fluid is heated by the solar heat transfer fluid in the shell and tube heat exchanger and flows to the heating pipeline; When the trough type heat collecting pipe is not working, the three-way L-shaped ball valve is connected to the air-heating fluid pipeline and the heating pipeline respectively, and the air-heating fluid directly supplies heat.

2. The wind heat pump and trough solar heat collection hybrid heating system according to claim 1 is characterized in that: The fan is mechanically connected to the heat pump compressor through a gearbox.

3. The wind heat pump and trough solar heat collection hybrid heating system according to claim 1 is characterized in that: The gearbox and the compressor are arranged inside the fan. The compressors in different fans are connected in parallel with each other through pipelines and connected to the three-way L-type ball valve.

4. The wind heat pump and trough solar heat collection hybrid heating system according to claim 1 is characterized in that: The trough-type heat collecting tubes are arranged in the vacant positions between the fans, and there are one or more trough-type heat collecting tubes.

5. The wind heat pump and trough solar heat collection hybrid heating system according to claim 4 is characterized in that: When there are multiple trough-type heat collecting tubes, the trough-type heat collecting tubes are arranged in parallel.

6. The wind heat pump and trough solar heat collection hybrid heating system according to claim 1 is characterized in that: The solar heat transfer fluid pipes of different trough type heat collecting tubes are connected in parallel to one pipe, which leads to the hot fluid port of the shell and tube heat exchanger.

7. The wind power heat pump and trough solar heat collection hybrid heating system according to claim 1 is characterized in that: The heating pipe leads to the heating end, the heating end is connected to the throttle valve, the throttle valve is connected to the ground heat absorption pipe, and leads to the compressor; The compressor, heating end, throttle valve and ground heat absorption pipe together constitute a heat pump.

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