Pipeline heat exchange system with monitoring function

Abstract

The present invention relates to a pipeline heat exchange system with a detection function, which is mainly used to realize a heat exchange system combining building energy conservation and pipeline monitoring, and at the same time provides a new energy solution. The present invention is a pipeline heat exchange system with a detection function, which includes a heat pump unit, an energy storage device, and an energy storage heat exchange pipeline. The user-end water outlet pipe of the heat pump unit is connected to the user pipeline water supply pipe, the user pipeline return pipe is connected to the user-end return pipe of the heat pump unit, the energy conversion end water outlet pipe of the heat pump unit is connected to the circulating water pipe water inlet end of the energy storage heat exchange pipeline through a water distributor, the water outlet end of the circulating water pipe is connected to the energy conversion end water inlet pipe of the heat pump unit through a water collector, and the heat pump unit is also connected to an energy storage device. Multiple groups of temperature sensors are installed inside and around the energy storage heat exchange pipeline, and optical fiber sensors are installed on the side walls of the heat exchange pipeline to transmit the temperature of the temperature sensor in real time.

Description

Technical Field

[0001] The invention relates to the technical field of new energy utilization, and in particular to a pipeline heat exchange system with dual functions of monitoring and heat exchange. Background Art

[0002] In view of the country's strong maintenance of environmental protection and the active advocacy and encouragement of new energy products, various energy application methods are emerging in an endless stream, such as solar energy, water / geothermal energy, air energy, electric heat source towers, etc. Among the above new energy utilization methods, either the production capacity is limited by the environment, or the energy consumption is huge, or the underground balance is destroyed and the ecological stability is affected. Some energy utilization methods also have serious pollution and noise problems, making it difficult to promote and apply on a large scale. In the past two years, the coal-to-gas project vigorously promoted in China has also achieved little results due to its huge functional capacity and expensive operation, which is a concentrated reflection of the energy pain points of the whole society!

[0003] Pipes accompany us in our lives and are widely used in water supply and drainage, rainwater, agricultural irrigation, gas transportation, sewage transportation and other related fields. The sewage in the pipes continues to exist with human production and life activities and is a continuous and stable energy source. If sewage can be utilized, it can not only achieve secondary utilization of sewage, but also help develop new clean energy.

[0004] As a new type of material, optical fiber has the characteristics of resistance to electrical interference, resistance to environmental noise, electrical insulation and strong inherent safety. It is widely used in reservoir parameter measurement in harsh underground environments.

[0005] If pipeline water supply technology can be combined with heat exchange technology, traditional pipelines will not only be a means of transporting water, but can also extract heat while transporting water, thus developing a new energy solution. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a pipeline heat exchange system with a monitoring function, so as to provide a new energy solution and achieve technical effects such as building energy saving and pipeline monitoring.

[0007] The technical solution for achieving the purpose of the present invention is as follows:

[0008] A pipeline heat exchange system with a monitoring function is characterized in that it includes a heat pump unit, an energy storage device, and an energy storage heat exchange pipeline. The user-end water outlet pipe of the heat pump unit is connected to the user pipeline water supply pipe, the user pipeline return pipe is connected to the user-end return pipe of the heat pump unit, the energy conversion end water outlet pipe of the heat pump unit is connected to the circulating water pipe water inlet end of the energy storage heat exchange pipeline through a water distributor, the water outlet end of the circulating water pipe is connected to the energy conversion end water inlet pipe of the heat pump unit through a water collector, the heat pump unit is also connected to an energy storage device, multiple groups of temperature sensors are installed inside and around the energy storage heat exchange pipeline, and optical fiber sensors are installed on the side walls of the heat exchange pipeline for transmitting signals from temperature, pressure and flow rate sensors in real time.

[0009] Moreover, the heat exchange pipeline includes a horizontal flow tube and a heat exchange tube coaxially spaced and spirally wound on the outside of the horizontal flow tube. The two ends of the heat exchange tube are respectively connected to a water distributor and a water collector. The outside of the horizontal flow tube is wrapped with an insulation layer.

[0010] Moreover, the optical fiber sensor is embedded in the wrapping insulation layer between the horizontal circulation tube and the heat exchange tube.

[0011] Moreover, the buried installation method of the energy storage heat exchange pipeline is: located below the frozen soil layer, the energy storage heat exchange pipeline is wrapped with an insulation layer composite soil, and the insulation layer composite soil has an inverted trapezoidal structure as a whole.

[0012] Moreover, the multiple groups of temperature sensors are embedded in the composite soil of the thermal insulation layer, and the embedding depths of the temperature sensors are 0 cm, 1 cm, 2 cm, 3 cm, and 4 cm respectively from the bottom of the energy storage heat exchange pipeline.

[0013] Moreover, the composite soil of the thermal insulation layer is prepared by mixing high-moisture clay soil with one or more of diatomaceous earth, perlite, pitch rock and obsidian.

[0014] Furthermore, the pipeline monitoring component comprises a flow rate monitor, a balancing valve, a check valve, a thermometer, a pressure gauge and an automatic control device for controlling the operation of the above components, which are located on the manifold.

[0015] Moreover, the temperature sensor, pressure sensor, and flow rate sensor transmit signals to the controller via optical fiber, which are then uploaded to the network cloud by the controller to achieve remote control. The controller is equipped with a limiter, which will automatically stop the system if the limit is exceeded, and an error report will be uploaded.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides a monitorable structure wall pipe heat exchange system, which promotes the technological transformation of the traditional pipeline system. Through the extensiveness of the underground pipeline network, it realizes the recovery and reuse of underground energy, and combines with the existing heat pump technology to achieve building energy saving and users' heating and cooling integrated air-conditioning system.

[0018] 2. The present invention can realize refined regional energy management by uniformly recovering the heat in sewage, rainwater and transportation facilities (pipe gallery) in underground pipes and combining the existing light energy, wind energy and air energy.

[0019] 3. By combining fiber-optic communication with heat exchange pipes, the problem of difficult communication in pipes in traditional technology is solved. Through the application of optical fiber, underground energy can be accurately calculated and data analyzed, realizing remote control of underground energy-saving systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the underground portion of the present invention.

[0023] In the figure, 1, frozen soil layer; 2, insulation layer composite soil; 3, insulation film; 4, heat exchange tube; 5, optical fiber sensor; 6, energy storage heat exchange pipeline. DETAILED DESCRIPTION

[0024] 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 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.

[0025] A pipeline heat exchange system with a monitoring function comprises a heat pump unit, an energy storage device, and an energy storage heat exchange pipeline. The user-end water outlet pipe of the heat pump unit is connected to the user pipeline water supply pipe, the user pipeline return pipe is connected to the user-end return pipe of the heat pump unit, the energy conversion end water outlet pipe of the heat pump unit is connected to the circulating water pipe water inlet end of the energy storage heat exchange pipeline through a water distributor, the water outlet end of the circulating water pipe is connected to the energy conversion end water inlet pipe of the heat pump unit through a water collector, the heat pump unit is also connected to an energy storage device, a plurality of groups of temperature sensors are installed inside and in the surrounding space of the energy storage heat exchange pipeline, and an optical fiber sensor is installed on the side wall of the heat exchange pipeline to transmit the temperature of the temperature sensor in real time.

[0026] There are a large number of pipeline equipment in the soil. The soil temperature around these pipelines that transport rainwater, sewage, etc. for a long time is close to the water temperature in the pipeline. Even in the dry season, some sewage is stored in the pipeline without pressure for a long time. At this time, the soil around the pipeline is also storing cold or heat. This part of energy has been wasted for a long time. This system has made the pipeline and the soil around the pipeline into a battery. Taking advantage of the characteristics of the soil below the permafrost layer being warm in winter and cool in summer, heat is taken from the soil in winter (cold storage), and in summer (heat storage), and the cold and heat balance of energy is achieved in spring and autumn. The equipment used to extract energy in the system is a heat pump unit. The energy conversion end of the heat pump unit is connected to the energy storage heat exchange pipeline through the manifold, and the energy is collected through the energy storage heat exchange pipeline. The heat pump unit transports the collected energy to the user in the form of water through the user end, thereby realizing heating, cooling and domestic hot water supply to the user. The heat pump unit is also connected to the energy storage device. When the system energy is insufficient, the energy can be supplemented through the energy storage device; when the energy is in excess, the excess energy can be stored in the energy storage device for use in intermittent energy shortages.

[0027] The energy storage device is provided with a self-starting device and a backup energy device, wherein the backup energy device includes one or more of a gas boiler, an electric boiler, a biomass boiler and a DC charger, so that the backup energy device can replenish the energy in the energy storage device in time when the energy is insufficient. The self-starting device can control the start and stop of the backup energy.

[0028] The heat exchange pipe includes a horizontal circulation pipe and a heat exchange pipe coaxially spaced and spirally wound on the outside of the horizontal circulation pipe. The two ends of the heat exchange pipe are respectively connected to a water distributor and a water collector. The outside of the horizontal circulation pipe is wrapped with an insulation layer. In actual use, the heat exchange pipe can be located in the insulation layer composite soil 2, so as to make full use of at least one of multiple clean energy sources such as geothermal energy, water source heat and air energy, so that the heat exchange pipe can fully exchange the energy of the insulation layer composite soil 2 under the action of the heat pump unit.

[0029] The optical fiber sensor 5 is embedded in the wrapping insulation layer between the horizontal circulation pipe and the heat exchange pipe. While realizing the heat exchange of the pipeline, it monitors the data of the pipeline itself and the surrounding environment of the pipeline (such as soil or air, etc.). By utilizing the characteristics of optical fiber materials and the penetration of underground pipelines, the data transmitted by the optical fiber sensor 5 is finally transmitted to the data center in the control room. The data center will organize and summarize the data at the optical fiber sensor 5, directly obtain the required data and calculate the energy extraction and energy saving efficiency while realizing the urban groundwater transportation.

[0030] The buried installation method of the energy storage heat exchange pipeline is as follows: the pipeline is located below the frozen soil layer, and the energy storage heat exchange pipeline is wrapped with a thermal insulation layer composite soil 2, and the thermal insulation layer composite soil 2 has an inverted trapezoidal structure as a whole.

[0031] The composite soil of the thermal insulation layer is made by mixing high-moisture clay soil with one or more of diatomaceous earth, perlite, pitch rock and obsidian. The diatomaceous earth selected is ultra-finely crushed diatomaceous earth.

[0032] The two insulation layer composite soil combinations are as follows:

[0033] 1. No less than 80% high-moisture clay soil, 5-10% perlite, and 10-15% pitch rock;

[0034] 2. 50% perlite, 50% high-moisture clay or diatomaceous earth. The above percentages are by mass.

[0035] Multiple groups of temperature sensors are embedded in the composite soil of the insulation layer, and the embedding depths of the temperature sensors are 0 cm, 1 cm, 2 cm, 3 cm, and 4 cm respectively from the bottom of the energy storage heat exchange pipeline.

[0036] When the temperature sensor is embedded at the bottom of the energy storage heat exchange pipe, it is used to detect the temperature at the energy storage heat exchange pipe; when the embedded depth of the temperature sensor is 1 cm from the bottom of the energy storage heat exchange pipe, it can detect the soil temperature 1 cm below the energy storage heat exchange pipe; as the embedded position of the temperature sensor changes, the soil temperature at different positions can be detected respectively, so as to judge the insulation efficiency of insulation layers of different thicknesses and judge the working efficiency of the energy storage heat exchange pipe according to the temperature fluctuations at the energy storage heat exchange pipe at different positions.

[0037] The manifold is made of a high molecular multi-layer composite polymer material, which is a composite of high-rate cross-linked polyolefin and one or more materials selected from nylon, glass fiber, aramid fiber, carbon fiber, and polypropylene, and the number of composite layers is three.

[0038] The pipeline monitoring components include a flow rate monitor, a balancing valve, a check valve, a thermometer, a pressure gauge and an automatic control device for controlling the operation of the above components on the manifold. The automatic control device can control the operation of other components. At the same time, the relevant data monitored by the above pipeline monitoring components will eventually be aggregated to the data center for processing via optical fiber transmission and uploaded to the corresponding mobile phone APP. The data can be used to remotely control the heat exchange system through automatic / manual control. The automatic control device used is Siemens PLC, the specific model is S7-1200, or S7-200CN, or Siemens' latest system PLC.

[0039] In addition to absorbing energy while being distributed in the soil, the energy storage heat exchange pipeline can also absorb water source heat, air heat, ground source heat, etc. In order to match the energy storage heat exchange pipeline, the heat pump unit also needs to include at least one or more of water source heat pump, ground source heat pump, and air source heat pump to meet the needs of different working environments of the energy storage heat exchange pipeline.

[0040] In actual processing, in order to ensure the quality and working efficiency of the energy storage heat exchange pipeline, the energy storage heat exchange pipeline is made of high molecular weight polyethylene and other composite materials. Other composite materials include one or more of nylon, glass fiber, aramid fiber, carbon fiber, polypropylene, and basalt fiber, among which the content of cross-linked polyethylene should be more than 75%.

[0041] The present invention also provides a method for preparing an energy storage heat exchange pipeline, which can be applied to the above-mentioned heat exchange system with monitoring function, and the specific preparation steps are as follows:

[0042] Step A: Selecting the composite material and the number of composite layers required for preparing the horizontal flow tube;

[0043] Step B: Extruding a horizontal flow tube using an extruder;

[0044] Step C: Selecting the composite material and the number of composite layers required for preparing the heat exchange tube;

[0045] Step D: Rotate the horizontal circulation tube and extrude the heat exchange tube while the horizontal circulation tube rotates.

[0046] Specifically, the extruders used for the horizontal circulation tube and the heat exchange tube can be the same type of extruder or different types of extruders. When the heat exchange tube is extruded, the horizontal circulation tube is rotated to obtain a heat exchange tube with a spiral structure.

[0047] In order to facilitate the monitoring function of the heat exchange system, optionally, after step D, the optical fiber and the sensor are installed at the corresponding position of the energy storage heat exchange pipeline according to actual needs.

[0048] The optical fiber can be horizontally inserted outside the horizontal circulation tube and inside the spiral heat exchange tube 4 as needed.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art 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 pipeline heat exchange system with monitoring function, It is characterized in that It includes a heat pump unit, an energy storage device, and an energy storage heat exchange pipeline. The user-side water outlet pipe of the heat pump unit is connected to the user pipeline water supply pipe, the user pipeline return pipe is connected to the user-side return pipe of the heat pump unit, the energy conversion end water outlet pipe of the heat pump unit is connected to the circulating water pipe water inlet end of the energy storage heat exchange pipeline through a water distributor, the water outlet end of the circulating water pipe is connected to the energy conversion end water inlet pipe of the heat pump unit through a water collector, and the heat pump unit is also connected to an energy storage device. Multiple groups of temperature sensors are installed inside and around the energy storage heat exchange pipeline, and optical fiber sensors are installed on the side walls of the heat exchange pipeline to transmit signals of temperature, pressure and flow rate sensors in real time; The energy storage heat exchange pipeline includes a horizontal circulation pipe and a heat exchange pipe coaxially spaced and spirally wound on the outside of the horizontal circulation pipe, the two ends of the heat exchange pipe are respectively connected to a water distributor and a water collector, and the outside of the horizontal circulation pipe is wrapped with an insulation layer; The energy storage heat exchange pipe is buried in the following manner: located below the frozen soil layer, the energy storage heat exchange pipe is wrapped with a thermal insulation layer of composite soil, and the thermal insulation layer of composite soil is in an inverted trapezoidal structure as a whole; The composite soil of the thermal insulation layer is made by mixing high-moisture clay soil with one or more of diatomaceous earth, perlite, pitch rock and obsidian; The composite soil composition of the insulation layer is as follows: ①, not less than 80% high-moisture clay soil, 5-10% perlite, 10-15% pitch rock; or ②, 50% perlite, 50% high-moisture clay soil or diatomaceous earth, mass percentage.

2. The pipeline heat exchange system with monitoring function according to claim 1, Features: The optical fiber sensor is embedded in the wrapping insulation layer between the horizontal circulation pipe and the heat exchange pipe, and interfaces are arranged at both ends of the pipe.

3. The pipeline heat exchange system with monitoring function according to claim 1, Features: The multiple groups of temperature sensors are embedded in the composite soil of the thermal insulation layer, and the embedding depths of the temperature sensors are 0 cm, 1 cm, 2 cm, 3 cm, and 4 cm respectively from the bottom of the energy storage heat exchange pipeline.

4. The pipeline heat exchange system with monitoring function according to claim 1, Features: The pipeline monitoring component includes a flow rate monitor, a balancing valve, a check valve, a thermometer, a pressure gauge and an automatic control device for controlling the operation of the above components, which are located on the manifold.

5. The pipeline heat exchange system with monitoring function according to claim 1, Features: It also includes a controller, which is used to control the heat pump unit and the energy storage device, and control the hot water of the heat pump unit to circulate and switch between the energy storage device and the user pipeline.

6. The pipeline heat exchange system with monitoring function according to claim 1, Features: The temperature sensor, pressure sensor, and flow rate sensor transmit signals to the controller via optical fiber, which are then uploaded to the network cloud by the controller to achieve remote control. The controller is equipped with a limiter, which will automatically stop the system if the limit is exceeded, and an error report will be uploaded.

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