CN110887185A - Active cooling system and method for subway tunnel - Google Patents
Active cooling system and method for subway tunnel Download PDFInfo
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- CN110887185A CN110887185A CN201911236800.2A CN201911236800A CN110887185A CN 110887185 A CN110887185 A CN 110887185A CN 201911236800 A CN201911236800 A CN 201911236800A CN 110887185 A CN110887185 A CN 110887185A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The application discloses an active cooling system and method for a subway tunnel. The front-end heat exchanger is buried in the tunnel surrounding rock and used for taking heat; the heat storage module is connected with the heat pump condenser and used for storing heat; and the temperature control module is used for determining a system operation strategy according to the temperature feedback. The system is simple to operate, the method is rapid and reliable, the initial investment is low, the occupied area is small, the operation efficiency is high, and the economic efficiency and the energy saving performance are obvious; the system has the function of energy storage, and effectively coordinates the matching relationship between tunnel heat and terminal load; on the basis of solving the problem of heat pollution of the subway tunnel, waste is changed into valuable, the heat in the tunnel is used for tail end heat supply after the quality of the heat in the tunnel is improved through a heat pump, and the heat pump is a new energy-saving technology and can solve the problem of heat pollution of the tunnel.
Description
Technical Field
The application relates to the field of tunnel cooling, in particular to an active cooling system and method for a subway tunnel.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The subway system can produce heat in a large amount in the operation process, and the main sources comprise train operation, personnel, lighting and auxiliary equipment heat production, escalator, advertising lamp box heat production, ventilation heat production and the like. A large amount of heat is absorbed by the surrounding rocks of the subway tunnel, and as the operation time increases, the temperature thereof will rise year by year. With the continuous accumulation of heat, a hot jacket is formed around the tunnel, and finally, the subway is thermally polluted, so that the safe and stable operation of the subway is influenced.
The inventor finds that at present, the subway tunnel mainly adopts a high-power fan ventilation mode to cool. In the air exhaust process, the heat in the air in the tunnel still can be subjected to heat exchange with the surrounding rocks, so that the method cannot thoroughly solve the problem of temperature rise of the surrounding rocks of the tunnel; in addition, the method does not fully utilize waste heat in the tunnel, has huge energy consumption after long-term operation, and is difficult to meet the requirement of cooling the surrounding rock of the tunnel.
Disclosure of Invention
The active cooling system and the active cooling method for the subway tunnel are used for extracting waste heat in the subway tunnel by using the cooling system and supplying heat to a building, and controlling the whole cooling and heating system by using the temperature control system, so that the problem of heat pollution caused by long-term operation of the conventional subway tunnel is solved, and meanwhile, the waste heat is used for supplying heat to the overground building, and better economic benefit and energy-saving benefit are achieved.
The first purpose of this application is to provide an active cooling system for subway tunnel, adopts following technical scheme:
the system comprises a front-end heat exchanger, a heat transmission module and a tail-end heat exchanger which are sequentially communicated, wherein the heat transmission module is also communicated with a heat storage module, the front-end heat exchanger is arranged in a subway tunnel and used for acquiring heat in the tunnel, the heat transmission module acquires the heat of the front-end heat exchanger and transmits the heat to the tail-end heat exchanger or the heat storage module, the system also comprises a temperature control system, the temperature control system comprises a front-end temperature sensor, a transmission element sensor, a tail-end environment temperature sensor and a controller, the front-end temperature sensor is arranged in tunnel surrounding rocks at the front-end heat exchanger and used for acquiring data of the tunnel surrounding rocks and transmitting the data to the controller, the transmission element sensor is installed in cooperation with the heat transmission module and used for acquiring data of each element of the heat transmission module and transmitting the data to the controller, and the tail-end environment temperature sensor, and the controller regulates and controls the working states of the front-end heat exchanger, the heat transmission module, the tail-end heat exchanger and the heat storage module according to the acquired data.
Furthermore, the front-end heat exchanger is a heat exchange tube, the heat exchange tube is arranged in the tunnel along the tunnel trend, the heat exchange tubes are multiple and are arranged along the circumferential direction of the tunnel, the front-end temperature sensors are multiple and are arranged along the circumferential direction of the tunnel surrounding rock corresponding to the heat exchange tubes and used for acquiring the temperatures of the tunnel surrounding rocks corresponding to different heat exchange tubes, and the controller controls whether the heat exchange tubes are conducted with the heat transmission module or not according to the data acquired by the front-end temperature sensors.
Furthermore, the heat transmission module is a heat pump system, the heat exchange tube is communicated with an evaporator of the heat pump system, and the tail end heat exchanger and the heat storage module are both communicated with a condenser of the heat pump system.
Further, the compressor of the heat pump system is connected with a controller, and the controller controls the transmission efficiency of the heat transmission module by adjusting the working state of the compressor.
Further, the end heat exchanger is in communication with the heat storage module through a valve.
A second object of the present application is to provide an active cooling method for a subway tunnel, which utilizes the active cooling system for a subway tunnel as described above, comprising the steps of:
acquiring a temperature value at a collecting point in real time through a front-end temperature sensor, averaging the temperature values, comparing the average value with an initial temperature value, and calculating a temperature difference △ T;
judging whether the tunnel surrounding rock has overheating problem according to △ T, and if so, judging whether the tunnel surrounding rock has overheating problem or not according to △ T>△T0The front-end heat exchanger and the heat transmission module work to start active cooling for the tunnel, and if △ T is less than or equal to △ T1The front end heat exchanger and heat transfer module are not operated, active cooling to the tunnel is shut down, otherwise, it is not shut down, wherein △ T0For the upper limit of temperature rise of tunnel surrounding rock, △ T1The lower limit of the temperature rise of the tunnel surrounding rock.
Further, a terminal environment temperature value is obtained in real time through a terminal environment temperature sensor and is compared with the design temperature t0Comparing the temperature difference and the temperature difference to calculate △ t;
judging the tail end operation condition according to △ T and △ T, if △ T>△T0And △ t>△t0The heat transfer module supplies heat to the end heat exchanger and outputs the heat to the external environment, if △ T>△T0And △ t is less than or equal to △ t0The heat transfer module supplies heat to the heat storage module for heat storage, wherein △ t0The upper limit of the temperature rise of the terminal environment.
Further, if △ T is less than or equal to △ T1And △ t>△t0If the △ T is less than or equal to △ T, the heat storage module supplies heat to the tail end heat exchanger without operating the heat transmission module1And △ t<△t0The entire system is not running.
Further, for the analysis of the heat affected radius of the tunnel, the front end sensor is arranged at a position where the temperature is correspondingly significant.
Further, the controller processes the acquired data in real time for adjusting the operation of the cooling system.
Compared with the prior art, the application has the advantages and positive effects that:
(1) the front-end heat exchanger in the subway tunnel is combined with the heat pump technology, so that an active subway tunnel cooling system is provided, heat in the tunnel is led out by adopting a medium and is utilized, and the technical problem of active treatment of the heat pollution of the subway tunnel is solved; the system is simple to operate, the method is quick and reliable, and the problem of tunnel thermal pollution can be fundamentally solved;
(2) compared with the traditional ground source heat pump system, the cooling system disclosed by the application changes waste into valuable on the basis of solving the problem of heat pollution of the subway tunnel, improves the quality of heat in the tunnel through a heat pump, and is used for supplying heat at the tail end, so that the cooling system has the characteristics of low initial investment, small occupied area and high operation efficiency, and has remarkable economical efficiency and energy saving property;
(3) the heat exchanger at the tail end is directly utilized for heat exchange or heat storage according to the selection of the heat supply performance at the tail end, the extracted heat is stored and released in use, and the matching relation between the tunnel heat and the tail end load is effectively coordinated;
(4) the whole heat exchange cooling system is controlled through the temperature control system, compared with the traditional active cooling, the controllability of the whole system is improved, the running state of the heat pump cooling system can be comprehensively controlled according to the condition in the tunnel and the condition of the environment where the tail end heat exchanger is located, and the running efficiency of the whole cooling system is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural diagram of a cooling system in embodiment 1 of the present application.
Wherein, 1-left side temperature sensor; 2-lower temperature sensor; 3-front end heat exchanger; 4, tunnel lining; 5, tunnel surrounding rock; 6-right side temperature sensor; 7-a first pressure gauge; 8-a first circulating water pump; 9-a second pressure gauge; 10-a first thermometer; 11-a first flow meter; 12-an evaporator; 13-a throttle valve; 14-a condenser; 15-a first valve; 16-a third pressure gauge; 17-a second circulating water pump; 18-a second valve; 19-a third valve; 20-a fourth valve; 21-terminal heat exchanger; 22-terminal ambient temperature sensor; 23-a fifth valve; 24-a sixth valve; 25-ambient temperature signal conductor; 26-heat exchanger in heat storage water tank; 27-a heat storage water tank; 28-a seventh valve; 27-a second flow meter; 28-a second thermometer; 29-a fourth pressure gauge; 30-a data processing center; 31-a compressor; 32-a multi-channel data display; 33-tunnel surrounding rock temperature signal wire; 34-upper temperature sensor; 35-control signal conductor.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting in this application.
As introduced in the background art, in the prior art, a subway tunnel is mainly cooled in a manner of ventilation by a high-power fan; in the air exhaust process, the heat in the air in the tunnel still can be subjected to heat exchange with the surrounding rocks, so that the method cannot thoroughly solve the problem of temperature rise of the surrounding rocks of the tunnel; in addition, waste heat in the tunnel is not fully utilized, energy consumption is large when the method is operated for a long time, and the requirement for cooling the surrounding rock of the tunnel is difficult to meet.
Example 1
In a typical embodiment of the present application, as shown in fig. 1, an active cooling system for a subway tunnel is proposed.
As shown in fig. 1, the system comprises a front-end heat exchanger 3, a heat transmission module, a heat storage module, a tail-end heat exchanger 21, a temperature control module, a first circulating water pump 8, a second circulating water pump 17 and other pipeline accessories.
The front-end heat exchanger comprises a plurality of branch pipes, can be embedded in a tunnel lining in advance, and is constructed in cooperation with a subway shield method to form a tunnel surrounding rock heat taking and heat releasing loop for heat taking; the heat-exchanging system can be laid inside a tunnel surrounding rock lining to exchange heat with surrounding rocks, can be laid inside a tunnel and in a tunnel exhaust channel to exchange heat with air, can be buried in the tunnel lining in a field construction mode, and is constructed in cooperation with a subway mine method to form a tunnel surrounding rock heat-taking and heat-releasing loop.
The heat transmission module comprises an evaporator 12, a condenser 14, a throttle valve 13 and a compressor 31, and is used for forming a heat pump system and realizing a heating cycle of the heat pump system;
the heat storage module comprises a heat storage water tank 27 (containing heat storage media inside) and an in-tank heat exchanger 26 for storing heat;
the heat storage module comprises a heat exchanger, a heat storage medium, a heat accumulator and accessories, has various forms, and can be an overground heat storage water tank and an underground heat storage rock soil. The overground heat storage water tank has the functions of pressure bearing, freeze prevention and heat preservation. The underground heat storage rock soil has the functions of boundary heat preservation and anti-leakage detection.
The temperature control module comprises a left side temperature sensor 1, a lower side temperature sensor 2, a right side temperature sensor 6, an upper side temperature sensor 34, a tail end environment temperature sensor 22, a tunnel surrounding rock temperature signal lead 33, an environment temperature signal lead 25, a multi-channel data display 32, a data processing center 30 and a control signal lead 35, and is used for controlling the start and stop of the system;
the other pipeline accessories comprise a first pressure gauge 7, a first circulating water pump 8, a second pressure gauge 9, a first temperature gauge 10, a first flow meter 11, a third pressure gauge 16, a second circulating water pump 17, a second flow meter 27, a second temperature gauge 28, a fourth pressure gauge 29 and first to seventh valves. The first pressure gauge 7 and the second pressure gauge 9 are used for monitoring the lift of the first circulating water pump 8, the first thermometer 10 and the first flowmeter 11 are respectively used for monitoring the temperature and the flow of a source side circulating medium, the third pressure gauge 16 and the fourth pressure gauge 29 are used for monitoring the lift of the second circulating water pump 17, and the second thermometer 28 and the second flowmeter 27 are respectively used for monitoring the temperature and the flow of a tail end circulating medium.
A water supply and return main pipe of the front-end heat exchanger 3 is connected with an inlet and an outlet of an evaporator 12, a first circulating water pump 8, a first thermometer 10 and a first flowmeter 11 are installed on the water return pipe, and a first pressure gauge 7 and a second pressure gauge 9 are arranged in front of and behind the water pump.
The evaporator 12, the compressor 31, the condenser 14 and the throttle valve 13 are connected in sequence to form a refrigerant circulation loop, and waste heat in the tunnel is extracted and then transferred to a subsequent hot end.
The inlet and outlet of the condenser 14 are respectively connected with the inlet and outlet of the heat exchanger 26 in the heat storage water tank and the inlet and outlet of the tail end heat exchanger 21. A second circulating water pump 17, a second thermometer 28 and a second flowmeter 27 are arranged on the water return pipe, and a third pressure gauge 16 and a fourth pressure gauge 29 are arranged in front of and behind the water pump.
The inlet and outlet of the heat exchanger 26 in the heat storage water tank are provided with a sixth valve 24 and a seventh valve 28, the inlet and outlet of the tail end heat exchanger 21 are provided with a third valve 19 and a fourth valve 20, the inlet and outlet of the condenser are provided with a first valve 15, and the tail end water supply pipe is provided with a second valve 18.
A communication pipe is arranged between the heat storage water tank 27 and the tail end heat exchanger 21, and a fifth valve 23 is arranged.
The terminal heat exchanger comprises multiple forms, and can be a fan coil, a floor radiation heating coil, a radiator and the like.
A tunnel surrounding rock inner left side temperature sensor 1, a tunnel surrounding rock inner lower portion temperature sensor 2, a tunnel surrounding rock inner right side temperature sensor 6 and a tunnel surrounding rock inner upper portion temperature sensor 34 are respectively arranged in the tunnel surrounding rock, all the sensors are connected to a multi-channel data display 32 through temperature signal wires 33, and data are further transmitted to a data processing center 30; the terminal ambient temperature sensor 22 transmits a temperature signal to the data processing center 30 through an ambient temperature signal conductor 25; after logical operation, the data processing center transmits control signals to the first circulating water pump 8, the second circulating water pump 17 and the compressor 31 through the control signal lead 35.
The front-end heat exchanger 3 should have sufficient pressure-bearing capacity and sufficient heat exchange area.
When the front-end heat exchanger 3 is arranged in a tunnel lining, corresponding anti-damage protection measures are adopted, and a water supply and return main pipe of the front-end heat exchanger is suitable to be positioned in a common ditch on the same side of the tunnel.
The left temperature sensor 1, the lower temperature sensor 2, the right temperature sensor 6, and the upper temperature sensor 34 should not be too far away from the inner wall surface of the tunnel, should be subjected to tunnel thermal influence radius analysis, and should be located at a position where temperature response is significant.
The first pressure gauge 7, the first circulating water pump 8, the second pressure gauge 9, the first thermometer 10, the first flowmeter 11, the third pressure gauge 16, the second circulating water pump 17, the second flowmeter 27, the second thermometer 28 and the fourth pressure gauge 29 have sufficient measurement accuracy and reliability, and can accurately reflect the running state of the water pump and the flowing state of media in the system.
The first valve 15, the second valve 18, the third valve 19, the fourth valve 20, the fifth valve 23, the sixth valve 24 and the seventh valve 28 are preferably electrically operated valves to facilitate switching between the heat storage and the heat supply modes.
The first circulating water pump 8 and the second circulating water pump 17 have a frequency conversion function and are used for adjusting the flow of a loop, and the pump lift can overcome the circulating resistance of the loop.
The temperature sensor has enough measurement precision, and realizes accurate test of the temperature in the tunnel surrounding rock and the air temperature in the tail end environment.
The data processing center 30 should have display, storage, and fast logic operation functions.
Example 2
In another exemplary embodiment of the present application, a method for actively cooling a subway tunnel is provided, which uses the cooling system as described in embodiment 1.
Firstly, installing a cooling system; each part of the system is connected and comprises a front-end heat exchanger, a heat pump module, a heat storage module, a tail-end heat exchanger, a temperature control module, a circulating water pump and pipeline accessories, so that an active cooling system of the subway tunnel is formed. The front end heat exchanger is embedded in a tunnel lining, a water supply and return main pipe of the heat exchanger is connected with a heat pump evaporator, a circulating water pump and a flowmeter are installed on a water return pipe, and a pressure gauge and a thermometer are arranged in front of and behind the water pump. The heat pump condenser is connected with a tail end heat storage device and a tail end environment radiator, a circulating water pump and a flowmeter are installed on a water return pipe, and a pressure gauge and a temperature gauge are arranged in front of and behind the water pump. The tail end heat storage device is internally provided with a heat exchanger, the heat exchanger is connected with a water supply and return pipe of a heat pump condenser, and an inlet and an outlet are provided with valves; the heat exchanger in the tail end environment is connected with a water supply and return pipe of a heat pump condenser, and a valve is arranged at an inlet and an outlet; in order to realize the switching of the heat pump condenser between the tail end heat storage device and the tail end environment radiator, a corresponding operation mode switching valve is arranged. Arranging a plurality of temperature sensors in the tunnel surrounding rock and the tail end environment, connecting temperature signals to a data processing center in a wired or wireless mode, and connecting output system control signals processed by the data center to a system circulating water pump and a heat pump unit;
then, injecting water into the system and carrying out initial adjustment to enable the system to normally operate; and regulating the acquired temperature signal to enable the temperature signal to normally measure the temperature.
And finally, the system starts to operate, and the subway tunnel is actively cooled.
Specifically, the method of the active cooling system includes the following steps:
1. the temperature sensor in the tunnel surrounding rock collects data and transmits the data to the data processing center, the temperature arithmetic mean value of each collection point is calculated and is compared with the initial temperature value of the tunnel surrounding rock, the temperature difference between the two is calculated to be △ T, the temperature sensor at the tail end environment collects data and transmits the data to the data processing center, and the data is transmitted to the data processing center and is compared with the design temperature T0Comparing the temperature difference and the temperature difference to calculate △ t;
2. judging whether the tunnel surrounding rock has overheating problems according to △ T, if △ TT>△T0(upper limit of temperature rise), the control center sends an operation signal to the system to start the active cooling system, and if △ T is less than or equal to △ T1(lower limit of temperature rise), the control center sends an operation signal to the system, and the active cooling system is closed, otherwise, the active cooling system is not closed;
3. judging the end operation condition according to △ T and △ T, if △ T>△T0(upper limit of temperature rise) and △ t>△t0(Upper temperature rise), the system supplies heat to the end environment (mode 1) if △ T>△T0(upper limit of temperature rise) and △ t is not more than △ t0(upper limit of temperature rise), the system stores heat to the heat storage module (mode 2), if △ T is less than or equal to △ T1(lower limit of temperature rise) and △ t>△t0(upper limit of temperature rise), the heat pump system is not operated, the operation mode 3 is started, if △ T is less than or equal to △ T1(lower limit of temperature rise) and △ t<△t0(upper temperature rise), the whole system is not operated.
Corresponding to the mode in 3, the opening and closing conditions of different valves are as follows:
it should be particularly pointed out that when the active cooling system operates on the source side and the load side, the circulating water pump is started firstly, and then the heat pump unit is started; and the operation mode of the tail end system is adjusted by adjusting the opening and closing of the tail end valve according to a control signal fed back by the control center.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An active cooling system for a subway tunnel comprises a front-end heat exchanger, a heat transmission module and a tail-end heat exchanger which are sequentially communicated, wherein the heat transmission module is also communicated with a heat storage module, the front-end heat exchanger is arranged in the subway tunnel and used for acquiring heat in the tunnel, the heat transmission module acquires the heat of the front-end heat exchanger and transmits the heat to the tail-end heat exchanger or the heat storage module, the active cooling system is characterized by further comprising a temperature control system, the temperature control system comprises a front-end temperature sensor, a transmission element sensor, a tail-end environment temperature sensor and a controller, the front-end temperature sensor is arranged in tunnel surrounding rock at the front-end heat exchanger and used for acquiring data of the tunnel surrounding rock and transmitting the data to the controller, the transmission element sensor is matched with the heat transmission module and used for acquiring data of each element of the heat transmission module and transmitting the data to the, the tail end environment temperature sensor is used for acquiring tail end environment data and sending the tail end environment data to the controller, and the controller regulates and controls working states of the front end heat exchanger, the heat transmission module, the tail end heat exchanger and the heat storage module according to the acquired data.
2. The active cooling system for the subway tunnel as claimed in claim 1, wherein said front end heat exchanger is a heat exchange tube, said heat exchange tube is arranged in the tunnel along the tunnel direction, said heat exchange tube has a plurality of heat exchange tubes, said heat exchange tube is arranged along the tunnel ring direction, said front end temperature sensor has a plurality of heat exchange tubes, said heat exchange tubes are arranged along the tunnel surrounding rock ring direction corresponding to the heat exchange tube, said controller controls the conduction between the heat exchange tube and the heat transmission module according to the data obtained by the front end temperature sensor.
3. The active cooling system for the subway tunnel as claimed in claim 2, wherein said heat transfer module is a heat pump system, said heat exchange pipe is connected to an evaporator of the heat pump system, and said terminal heat exchanger and said heat storage module are both connected to a condenser of the heat pump system.
4. The active cooling system for a subway tunnel as claimed in claim 3, wherein said heat pump system compressor is connected with a controller, said controller controls the heat transfer module transfer efficiency by adjusting the working state of the compressor.
5. The active cooling system for a subway tunnel as claimed in claim 4, wherein said end heat exchanger is in communication with a heat storage module through a valve.
6. An active cooling method for a subway tunnel, characterized in that it uses an active cooling system for a subway tunnel according to claim 5, characterized in that it comprises the following steps:
acquiring a temperature value at a collecting point in real time through a front-end temperature sensor, averaging the temperature values, comparing the average value with an initial temperature value, and calculating a temperature difference △ T;
judging whether the tunnel surrounding rock has overheating problem according to △ T, and if so, judging whether the tunnel surrounding rock has overheating problem or not according to △ T>△T0The front-end heat exchanger and the heat transmission module work to start active cooling for the tunnel, and if △ T is less than or equal to △ T1The front end heat exchanger and heat transfer module are not operated, active cooling to the tunnel is shut down, otherwise, it is not shut down, wherein △ T0For the upper limit of temperature rise of tunnel surrounding rock, △ T1The lower limit of the temperature rise of the tunnel surrounding rock.
7. An active cooling method for a subway tunnel as claimed in claim 6,
acquiring a terminal environment temperature value in real time through a terminal environment temperature sensor, and comparing the terminal environment temperature value with a design temperature t0Comparing the temperature difference and the temperature difference to calculate △ t;
judging the tail end operation condition according to △ T and △ T, if △ T>△T0And △ t>△t0The heat transfer module supplies heat to the end heat exchanger and outputs the heat to the external environment, if △ T>△T0And △ t is less than or equal to △ t0The heat transfer module supplies heat to the heat storage module for heat storage, wherein △ t0The upper limit of the temperature rise of the terminal environment.
8. An active cooling method for a subway tunnel as claimed in claim 7,
if △ T is less than or equal to△T1And △ t>△t0If the △ T is less than or equal to △ T, the heat storage module supplies heat to the tail end heat exchanger without operating the heat transmission module1And △ t<△t0The entire system is not running.
9. An active cooling method for a subway tunnel as claimed in claim 6, wherein for tunnel thermal influence radius analysis, front end sensors are arranged at positions where the temperature is correspondingly significant.
10. An active cooling method for a subway tunnel as claimed in claim 6, wherein said controller processes said acquired data in real time for adjusting the operation of the cooling system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112326431A (en) * | 2020-11-06 | 2021-02-05 | 四川大学 | Experimental device and experimental method for rock deformation and damage process |
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| CN105240919A (en) * | 2015-10-30 | 2016-01-13 | 北京建筑大学 | Energy storage type air source heat pump heating system and operation method thereof |
| CN208735723U (en) * | 2018-04-09 | 2019-04-12 | 四川协成电力工程设计有限公司 | Heating and cooling system |
| CN108981229A (en) * | 2018-08-09 | 2018-12-11 | 青岛理工大学 | A kind of subway waste heat source heat pump system and its working method with auxiliary cold source |
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