Distributed cooling and heating system combining coaxial double-pipe heat exchanger and cooling tower

Abstract

The utility model belongs to renewable energy utilization technical field, especially relates to a kind of coaxial sleeve pipe heat exchange combined cooling tower's distributed cooling and heating system.A kind of coaxial sleeve pipe heat exchange combined cooling tower's distributed cooling and heating system, including coaxial sleeve pipe heat exchanger and cooling tower, coaxial sleeve pipe heat exchanger and cooling tower between respectively connected with main pipeline and source side pipeline, the one end of main pipeline near coaxial sleeve pipe heat exchanger is equipped with geothermal side circulating pump, the one end of main pipeline near cooling tower is equipped with multiple distributed water source heat pump host, the one end of source side pipeline near cooling tower is equipped with cooling tower side circulating pump, the one end of source side pipeline near coaxial sleeve pipe heat exchanger is connected with distributed water source heat pump host intercommunication.The utility model has combined cooling tower with coaxial sleeve pipe heat exchanger, constructs distributed cooling and heating system, to improve energy utilization efficiency, reduce transmission loss, realize flexible, efficient cold and heat supply.

Description

Technical Field

[0001] This utility model belongs to the field of renewable energy utilization technology, and specifically relates to a distributed cooling and heating system of a coaxial sleeve heat exchange combined with a cooling tower. Background Technology

[0002] Heating in northern Chinese cities generates significant pollution annually. To effectively combat this pollution, it is crucial to accelerate the adjustment of the energy structure, vigorously develop new and renewable energy sources, and achieve a synergistic effect of pollution reduction and carbon reduction. With the rapid development of the construction industry, existing heating and cooling supply systems, such as coal-fired power plants, gas-fired municipal heating, and distributed gas-fired boilers, consume large amounts of fossil fuels. This not only leads to high energy costs but also causes severe environmental pollution, making them unsuitable for the current energy transition trend.

[0003] Underground pipe heat exchange systems, utilizing geothermal energy for heat exchange, offer advantages such as energy saving, environmental friendliness, and stable operation. Medium-deep geothermal coaxial tube heat exchangers, as highly efficient heat exchange devices, boast compact structure, high heat exchange efficiency, and high pressure resistance; however, using coaxial tubes alone cannot meet the cooling load requirements of buildings. Cooling towers utilize the contact between water and air for heat exchange, commonly used for industrial cooling and auxiliary heat dissipation in air conditioning systems. They achieve cooling by removing heat through water evaporation; however, cooling towers alone cannot provide heating in winter. Currently, centralized heating systems require large-scale pipeline construction, resulting in high investment costs and significant energy losses during transmission. Furthermore, centralized systems struggle to flexibly adjust to the cooling and heating load demands of different areas, leading to energy waste.

[0004] Therefore, adopting a system that combines the advantages of coaxial tube heat exchangers and cooling towers to achieve distributed cooling and heating is of great practical significance. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a distributed cooling and heating system that combines a coaxial tube heat exchanger with a cooling tower. By organically combining a coaxial tube heat exchanger with a cooling tower, a distributed cooling and heating system is constructed to improve energy utilization efficiency, reduce transmission losses, and achieve flexible and efficient cooling and heating supply.

[0006] The technical solution of this utility model is as follows: a distributed cooling and heating system combining a coaxial tube heat exchanger and a cooling tower, including a coaxial tube heat exchanger and a cooling tower, wherein a main pipe and a source-side pipe are respectively connected between the coaxial tube heat exchanger and the cooling tower, a geothermal side circulation pump is provided at the end of the main pipe near the coaxial tube heat exchanger, and multiple distributed water source heat pump units are provided at the end of the main pipe near the cooling tower, a cooling tower side circulation pump is provided at the end of the source-side pipe near the cooling tower, and the end of the source-side pipe near the coaxial tube heat exchanger is connected to the distributed water source heat pump units.

[0007] The main pipeline is equipped with geothermal side supply and return water connecting valves between the geothermal side circulation pump and the distributed water source heat pump host, and the source side pipeline is equipped with geothermal side supply and return water connecting valves between the coaxial tube heat exchanger and the distributed water source heat pump host.

[0008] A first connecting pipe is provided between the main pipe and the source-side pipe between the geothermal side supply and return water connecting valve and the distributed water source heat pump host, and the geothermal side supply and return water connecting valve is provided on the first connecting pipe.

[0009] The distributed water source heat pump host is connected to a user-side pipe, and an air conditioning terminal is connected to the user-side pipe.

[0010] The source-side pipeline between the circulating pump on the cooling tower side and the distributed water source heat pump host, and the main pipeline between the cooling tower and the distributed water source heat pump host, are respectively equipped with a cooling tower-side winter / summer switching valve.

[0011] A second connecting pipe is provided between the main pipe and the source-side pipe between the cooling tower-side winter / summer switching valve and the distributed water source heat pump host, and a cooling tower-side supply and return water connecting valve is provided on the second connecting pipe.

[0012] The technical advantages of this utility model are as follows: This utility model, through the coordinated operation of coaxial sleeve heat exchange and cooling tower, makes up for the shortcomings of coaxial sleeve in meeting the building's heating and cooling load requirements and the inability of cooling tower to provide heating in winter, forming a dual heating and cooling system. The system adopts multiple sets of distributed air conditioning units, which can be turned on / off in a timely manner according to the usage period, resulting in good energy-saving effect.

[0013] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to this utility model.

[0015] Reference numerals: 10-Coaxial tube heat exchanger; 20-Geothermal side circulating pump; 30-Geothermal side supply and return water connection valve; 31-Geothermal side winter / summer switching valve; 32-Source side pipeline; 40-Distributed water source heat pump main unit; 41-User side pipeline; 42-Air conditioning terminal; 50-Cooling tower side supply and return water connection valve; 51-Cooling tower side winter / summer switching valve; 60-Cooling tower side circulating pump; 70-Cooling tower. Detailed Implementation Example 1

[0016] like Figure 1 As shown, a distributed cooling and heating system combining a coaxial tube heat exchanger and a cooling tower includes a coaxial tube heat exchanger 10 and a cooling tower 70. A main pipe and a source-side pipe 32 are respectively connected between the coaxial tube heat exchanger 10 and the cooling tower 70. A geothermal circulating pump 20 is provided at one end of the main pipe near the coaxial tube heat exchanger 10, and multiple distributed water source heat pump units 40 are provided at one end of the main pipe near the cooling tower 70. A cooling tower-side circulating pump 60 is provided at one end of the source-side pipe 32 near the cooling tower 70, and the end of the source-side pipe 32 near the coaxial tube heat exchanger 10 is connected to the distributed water source heat pump units 40.

[0017] In use, this invention operates as follows: Heating mode: Powered by the geothermal circulating pump 20, the hot water in the coaxial tube heat exchanger 10 exchanges for underground heat energy. The hot water is then transported via the main pipeline to the distributed water source heat pump host 40, where it absorbs heat to form heating hot water with a supply / return temperature of 45 / 40℃, thus providing heating. Cooling mode: The cooling tower 70 cools the 35℃ hot water to 30℃, and the 30℃ cold water is then cooled by the distributed water source heat pump host 40. The entire cycle is powered by the cooling tower-side circulating pump 60. This invention organically combines the coaxial tube heat exchanger and the cooling tower to construct a distributed heating and cooling system, thereby improving energy utilization efficiency, reducing transmission losses, and achieving flexible and efficient heating and cooling supply. Example 2

[0018] Based on Embodiment 1, in this embodiment, preferably, the main pipeline between the geothermal side circulation pump 20 and the distributed water source heat pump host 40, and the source side pipeline 32 between the coaxial sleeve heat exchanger 10 and the distributed water source heat pump host 40 are respectively provided with geothermal side supply and return water connecting valves 30.

[0019] In this invention, the main pipeline is provided with a geothermal side supply and return water connecting valve 30 between the geothermal side circulation pump 20 and the distributed water source heat pump host 40, and the source side pipeline 32 is provided with a geothermal side supply and return water connecting valve 30 between the coaxial sleeve heat exchanger 10 and the distributed water source heat pump host 40, for controlling the main pipeline and the source side pipeline 32 during heating. Example 3

[0020] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, a first connecting pipe is provided between the main pipe and the source-side pipe 32 between the geothermal side supply and return water connecting valve 30 and the distributed water source heat pump host 40, and the geothermal side supply and return water connecting valve 30 is provided on the first connecting pipe.

[0021] The present invention provides a first connecting pipe between the main pipe and the source-side pipe 32 between the geothermal side supply and return water connecting valve 30 and the distributed water source heat pump host 40. The geothermal side supply and return water connecting valve 30 is provided on the first connecting pipe for controlling the main pipe and the source-side pipe 32 during heating. Example 4

[0022] Based on Embodiment 1 or Embodiment 3, in this embodiment, preferably, the distributed water source heat pump host 40 is connected to a user-side pipe 41, and an air conditioning terminal 42 is connected to the user-side pipe 41.

[0023] When in use, the hot or cold water from the distributed water source heat pump host 40 is delivered to the air conditioning terminal 42 via the user-side pipeline system 41 for heating or cooling. Example 5

[0024] Based on Embodiment 1 or Embodiment 4, in this embodiment, preferably, the source-side pipeline 32 is provided with a cooling tower-side winter / summer switching valve 51 between the cooling tower-side circulating pump 60 and the distributed water source heat pump host 40, and the main pipeline is provided between the cooling tower 70 and the distributed water source heat pump host 40.

[0025] The present invention provides cooling tower-side winter-summer switching valves 51 between the cooling tower-side circulating pump 60 and the distributed water source heat pump host 40 in the source-side pipeline 32, and between the cooling tower 70 and the distributed water source heat pump host 40 in the main pipeline. The cooling tower-side winter-summer switching valves 51 are used to control the main pipeline and the source-side pipeline 32 during cooling. Example 6

[0026] Based on Embodiment 1 or Embodiment 5, in this embodiment, preferably, a second connecting pipe is provided between the main pipe and the source-side pipe 32 between the cooling tower-side winter-summer switching valve 51 and the distributed water source heat pump host 40, and a cooling tower-side supply and return water connecting valve 50 is provided on the second connecting pipe.

[0027] The present invention provides a second connecting pipe between the main pipe and the source-side pipe 32 between the cooling tower-side winter / summer switching valve 51 and the distributed water source heat pump host 40. The second connecting pipe is provided with a cooling tower-side supply and return water connecting valve 50, which is used to control the main pipe and the source-side pipe 32 during cooling.

[0028] In practical use, this utility model specifically includes:

[0029] Heating conditions:

[0030] Powered by the geothermal circulating pump 20, the hot water in the coaxial tube heat exchanger 10 exchanges for underground heat energy and is transported to the distributed water source heat pump host 40 through the main pipeline. The host absorbs heat to form heating hot water with a supply and return water temperature of 45 / 40℃, which is then transported to the air conditioning terminal 42 for heating through the user-side pipeline 41.

[0031] At this time, the geothermal side winter-summer switching valve 31 is open, the geothermal side supply and return water connection valve 30 is closed, the cooling tower side winter-summer switching valve 51 is closed, and the cooling tower side supply and return water connection valve 50 is closed.

[0032] Cooling operation:

[0033] The cooling tower 70 cools the 35°C hot water to 30°C, and the 30°C chilled water is then cooled by the distributed water source heat pump unit 40. The entire cycle is powered by the cooling tower-side circulation pump 60. The user side typically supplies and returns water at temperatures of 7°C / 12°C, which is then delivered to the air conditioning terminal 42 via the user-side piping system 41 to complete the cooling process.

[0034] At this time, the heating circulation valve 31 is closed, the geothermal side supply and return water connection valve 30 is closed, the cooling tower side winter and summer switching valve 51 is open, and the cooling tower side supply and return water connection valve 50 is closed.

[0035] This invention organically combines a coaxial tube heat exchanger with a cooling tower to construct a distributed cooling and heating system, thereby improving energy utilization efficiency, reducing transmission losses, and achieving flexible and efficient cooling and heating supply.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A distributed cooling and heating system combining a coaxial tube heat exchanger and a cooling tower, characterized in that: The system includes a coaxial tube heat exchanger (10) and a cooling tower (70). A main pipe and a source-side pipe (32) are connected between the coaxial tube heat exchanger (10) and the cooling tower (70). A geothermal circulating pump (20) is provided at one end of the main pipe near the coaxial tube heat exchanger (10). Multiple distributed water source heat pump units (40) are provided at one end of the main pipe near the cooling tower (70). A cooling tower-side circulating pump (60) is provided at one end of the source-side pipe (32) near the cooling tower (70). The end of the source-side pipe (32) near the coaxial tube heat exchanger (10) is connected to the distributed water source heat pump unit (40).

2. The distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to claim 1, characterized in that: The main pipeline is provided with geothermal side supply and return water connecting valves (30) between the geothermal side circulation pump (20) and the distributed water source heat pump host (40), and the source side pipeline (32) is provided with geothermal side supply and return water connecting valves (30) between the coaxial sleeve heat exchanger (10) and the distributed water source heat pump host (40).

3. The distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to claim 2, characterized in that: A first connecting pipe is provided between the main pipe and the source-side pipe (32) between the geothermal side supply and return water connecting valve (30) and the distributed water source heat pump host (40), and the geothermal side supply and return water connecting valve (30) is provided on the first connecting pipe.

4. The distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to claim 1, characterized in that: The distributed water source heat pump host (40) is connected to a user-side pipe (41), and an air conditioning terminal (42) is connected to the user-side pipe (41).

5. The distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to claim 1, characterized in that: The source-side pipeline (32) is equipped with a cooling tower-side winter / summer switching valve (51) between the cooling tower-side circulating pump (60) and the distributed water source heat pump host (40), and the main pipeline is equipped with a cooling tower-side winter / summer switching valve (51) between the cooling tower (70) and the distributed water source heat pump host (40).

6. The distributed cooling and heating system of a coaxial sleeve heat exchange combined cooling tower according to claim 5, characterized in that: A second connecting pipe is provided between the main pipe and the source-side pipe (32) between the cooling tower-side winter-summer switching valve (51) and the distributed water source heat pump host (40), and a cooling tower-side water supply and return connecting valve (50) is provided on the second connecting pipe.

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