CN114370700B - Method and device for controlling outlet water temperature of water chilling unit in subway station - Google Patents

Abstract

The present application discloses a method and device for controlling the outlet water temperature of a chiller in a subway station, wherein the method includes: collecting the actual wall surface temperature of the wall surface of at least one target area in the subway station; collecting the current indoor air dry bulb temperature of the at least one target area and the current relative humidity, and calculate the corresponding current indoor air dew point temperature; evaluate the condensation risk of each target area, obtain the condensation risk coefficient of the subway station, and control the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient . As a result, it solves the problem that the subway station wall temperature is low, the personnel humidity load is large, and the temperature and humidity distribution in different areas is uneven. According to the traditional water temperature control method of the chiller, the air conditioning system is prone to condensation or excessive dehumidification in the subway station. High energy consumption, etc. question.

Description

Method and device for controlling outlet water temperature of chiller in subway station

technical field

The present application relates to the technical field of air-conditioning energy-saving control, in particular to a method and device for controlling the outlet water temperature of a chiller in a subway station.

Background technique

As of the end of 2020, a total of 45 cities in China have opened 244 urban rail transit operating lines, with a total length of 7969.7km, and a total of 4681 stations in operation across the country, a record high. The continuous increase of subway operation lines has led to the proportion of subway operation energy consumption in the energy consumption of the whole society becoming non-negligible. According to the energy consumption of domestic subways during the operation period, although the cost of the ventilation and air conditioning system is only equivalent to 8% to 10% of the subway investment, the energy consumption of the ventilation and air conditioning system during the operation process accounts for about 40%.

The outlet water temperature control method of the chiller in the subway station has a great impact on the energy consumption of the ventilation and air conditioning system. If the outlet water temperature of the chiller is too low, it will cause the ventilation and air conditioning system to dehumidify in some working conditions that do not require dehumidification, increase the dehumidification load, and increase the air conditioning. The energy consumption of the system operation; the control of the outlet water temperature of the chiller is too high, which will cause the ventilation and air conditioning system to fail to dehumidify in some working conditions, and condensation may appear in the station.

Regarding the method of controlling the outlet water temperature of the chiller, related technologies have proposed various control ideas, such as indoor relative humidity control, outdoor temperature and humidity control, indoor and outdoor air dew point temperature combined with air-conditioning unit air duct condensation control, indoor and outdoor air enthalpy combined with cold water Unit load rate control, etc.

However, the subway station is a semi-open underground space. During the air-conditioning season, the temperature of the inner surface of the enclosure structure is lower than that of other types of public buildings. There are differences in the risk of condensation due to uneven distribution of air temperature and humidity in different regions. The related technology does not consider the differences in the risk of dew condensation on the surface of various areas of the station, and does not monitor the surface temperature inside the station. As a result, under the conditions of high outdoor humidity in summer, severe condensation will occur in some areas of many stations. Needs to be improved.

Contents of the invention

This application provides a method and device for controlling the outlet water temperature of a chiller in a subway station to solve the problem of low temperature on the wall surface of the subway station, large humidity load for personnel, and uneven distribution of temperature and humidity in different areas. Problems such as excessive energy consumption of the air conditioning system caused by condensation or excessive dehumidification.

The embodiment of the first aspect of the present application provides a method for controlling the outlet water temperature of a chiller in a subway station, including the following steps: collecting the actual wall surface temperature of the wall surface of at least one target area in the subway station; collecting the current indoor air temperature of the at least one target area dry bulb temperature and current relative humidity, and calculate the corresponding current indoor air dew point temperature based on the current indoor air dry bulb temperature and the current relative humidity; and evaluate based on the actual wall temperature of each zone and the current air dew point temperature The condensation risk of each target area is obtained by obtaining the condensation risk coefficient of the subway station, and controlling the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient.

Optionally, in an embodiment of the present application, the controlling the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient includes: if the condensation risk coefficient is less than a preset threshold, then Up-regulate the outlet water temperature of the chiller based on a preset up-regulation strategy; if the condensation risk coefficient is greater than or equal to the preset threshold, down-regulate the outlet water temperature of the chiller based on a preset down-regulation strategy.

Optionally, in an embodiment of the present application, before controlling the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient, it also includes: collecting the current outdoor air dry-bulb temperature of the subway station and the current relative humidity; calculate the corresponding current outdoor wet-bulb temperature according to the current outdoor air dry-bulb temperature and the current relative humidity; substitute the outdoor wet-bulb temperature into the preset chiller outlet water temperature calculation model to obtain the The initial setting value of the outlet water temperature of the chiller and the maximum and minimum allowable adjustment values determine the preset upward adjustment strategy and the preset downward adjustment strategy.

Optionally, in an embodiment of the present application, the formula for calculating the condensation risk coefficient is:

Among them, F _i is the risk factor of condensation on the wall, T _bi is the wall temperature, T _di is the dew point temperature, i is different areas, area 1: i = 1, the entrance and exit passage wall ground; area 2: i = 2, the station hall wall Ground; area three: i=3, platform wall ground; area four: i=4, platform door; area five: i=5, equipment area wall ground.

Condensation risk factor at the station:

Among them, n1, n2, n3, n4, and n5 are the number of wall temperature monitoring points in areas 1, 2, 3, 4, and 5, respectively, and η _i is the influence factor of condensation risk in different areas on the overall condensation of the station, and i is Different areas, area 1: i=1, entrance and exit passage wall and ground; area 2: i=2, station hall wall and ground; area 3: i=3, platform wall and ground; area 4: i=4, platform door; area 5 : i=5, the wall and ground of the equipment area, the specific values of η _i are: η ₁ =0.3, η ₂ =0.2, η ₃ =0.3, η ₄ =0.1, η ₅ =0.1;

The calculation formula of the preset water outlet temperature calculation model of the chiller is:

T _Lmax =T _Lbegin + 2°C,

T _Lmin = T _{L initial} -2 ℃,

Among them, T _{S outside measured} is the measured outdoor air wet bulb temperature, T _{S outside design} is the design outdoor wet bulb temperature, and T _{S inside design} is the design indoor wet bulb temperature.

Optionally, in an embodiment of the present application, the acquisition period of the actual wall surface temperature of the wall surface of the at least one target area is a preset period or determined by actual environmental parameters in the subway station.

The embodiment of the second aspect of the present application provides a control device for outlet water temperature of a chiller in a subway station, including: a collection module for collecting the actual wall surface temperature of at least one target area in a subway station; a calculation module for collecting the temperature The current indoor air dry bulb temperature and the current relative humidity of at least one target area, and calculate the corresponding current indoor air dew point temperature according to the current indoor air dry bulb temperature and the current relative humidity; and a control module, for based on each The actual wall temperature of the area and the current air dew point temperature evaluate the condensation risk of each target area, obtain the condensation risk coefficient of the subway station, and control the water chiller in the subway station according to the condensation risk coefficient Target outlet water temperature.

Optionally, in an embodiment of the present application, the control module is further configured to: if the condensation risk coefficient is less than a preset threshold, increase the outlet water temperature of the chiller based on a preset upward adjustment strategy; if the If the condensation risk coefficient is greater than or equal to the preset threshold, the outlet water temperature of the chiller is lowered based on a preset lowering strategy.

Optionally, in an embodiment of the present application, the calculation module further includes: a collection unit, configured to collect the current outdoor air dry bulb temperature and current relative humidity of the subway station; The current outdoor dry-bulb temperature of the outdoor air and the current outdoor wet-bulb temperature corresponding to the calculation of the current relative humidity; the generation unit is used to substitute the outdoor wet-bulb temperature into the preset chiller outlet water temperature calculation model to obtain the chiller The initial setting value of the outlet water temperature and the allowable maximum and minimum adjustment values determine the preset upward adjustment strategy and the preset downward adjustment strategy.

Optionally, in an embodiment of the present application, the formula for calculating the condensation risk coefficient is:

Among them, F _i is the risk factor of condensation on the wall, T _bi is the wall temperature, T _di is the dew point temperature, i is different areas, area 1: i = 1, the entrance and exit passage wall ground; area 2: i = 2, the station hall wall Ground; area three: i=3, platform wall ground; area four: i=4, platform door; area five: i=5, equipment area wall ground.

Condensation risk factor at the station:

Among them, n1, n2, n3, n4, and n5 are the number of wall temperature monitoring points in areas 1, 2, 3, 4, and 5, respectively, and η _i is the influence factor of condensation risk in different areas on the overall condensation of the station, and i is Different areas, area 1: i=1, entrance and exit passage wall and ground; area 2: i=2, station hall wall and ground; area 3: i=3, platform wall and ground; area 4: i=4, platform door; area 5 : i=5, the wall and ground of the equipment area, the specific values of η _i are: η ₁ =0.3, η ₂ =0.2, η ₃ =0.3, η ₄ =0.1, η ₅ =0.1;

The calculation formula of the preset water outlet temperature calculation model of the chiller is:

T _Lmax =T _Lbegin + 2°C,

T _Lmin = T _{L initial} -2 ℃,

Among them, T _{S outside measured} is the measured outdoor air wet bulb temperature, T _{S outside design} is the design outdoor wet bulb temperature, and T _{S inside design} is the design indoor wet bulb temperature.

Optionally, in an embodiment of the present application, the collection period of the collection module is a preset period or determined by actual environmental parameters in the subway station.

The embodiment of the third aspect of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor executes the program to realize The method for controlling the outlet water temperature of a chiller in a subway station as described in the above embodiments.

The embodiment of the fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to realize the subway station water chiller set forth in any one of claims 1-5 Outlet water temperature control method.

The embodiment of this application aims at the characteristics of different air temperature and humidity distributions in different areas of the subway station, so that the risk of condensation is different. By collecting the air temperature and humidity in different areas of the subway station, the air dew point temperature of each area in the room is calculated, and the risk of condensation is evaluated. In this way, the optimal outlet water temperature of the chiller can be determined, and the outlet water temperature of the chiller can be increased while avoiding condensation in the station, thereby reducing the dehumidification load of the air conditioner, improving the operating efficiency of the chiller, and greatly reducing the energy consumption of the air conditioning system. Reduce operating costs of subway stations. Therefore, it solves the problem of low temperature on the wall surface of the subway station, large humidity load of personnel, and uneven temperature and humidity distribution in different areas. According to the traditional control method of outlet water temperature of the chiller, the air-conditioning system energy consumption of the subway station is prone to condensation or excessive dehumidification is too high. question.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a flow chart of a method for controlling outlet water temperature of a chiller in a subway station according to an embodiment of the present application;

Fig. 2 is a structural schematic diagram of a water outlet temperature control device of a subway station chiller provided according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of an electronic device provided according to an embodiment of the present application.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

The method and device for controlling the outlet water temperature of a chiller in a subway station according to an embodiment of the present application will be described below with reference to the accompanying drawings. In view of the low temperature on the wall surface of the subway station mentioned in the background technology center above, the large humidity load of personnel, and the uneven distribution of temperature and humidity in different areas, according to the traditional control method of the outlet water temperature of the chiller, the air conditioning system in the subway station is prone to condensation or excessive dehumidification. In view of the problem of high energy consumption, this application provides a method for controlling the outlet water temperature of chillers in subway stations. In this method, according to the characteristics of different distributions of air temperature and humidity in different areas of subway stations, so that the risk of condensation is different, by collecting subway The air temperature and humidity in different areas of the station, calculate the dew point temperature of the air in each area of the room, and evaluate the risk of condensation, so as to determine the optimal outlet water temperature of the chiller, and increase the outlet water temperature of the chiller while avoiding condensation in the station. In turn, the dehumidification load of the air conditioner is reduced, the operating efficiency of the chiller is improved, the energy consumption of the air conditioner system is greatly reduced, and the operating cost of the subway station is reduced. Therefore, it solves the problem of low temperature on the wall surface of the subway station, large humidity load of personnel, and uneven temperature and humidity distribution in different areas. According to the traditional control method of outlet water temperature of the chiller, the air-conditioning system energy consumption of the subway station is prone to condensation or excessive dehumidification is too high. question.

Specifically, FIG. 1 is a schematic flowchart of a method for controlling outlet water temperature of a chiller in a subway station provided in an embodiment of the present application.

As shown in Figure 1, the method for controlling the outlet water temperature of the chiller in the subway station includes the following steps:

In step S101, the actual wall surface temperature of the wall surface of at least one target area in the subway station is collected.

For example, the embodiment of the present application can evenly arrange wall surface temperature sensors according to the area of different areas of the subway station (such as the wall floor of the entrance and exit passage, the wall floor of the station hall, the wall floor of the platform, the platform door and the wall floor of the equipment area, etc.), for Collect the wall temperature of the wall and the ground. In the embodiment of the present application, aiming at the wall temperature differences in different areas of the subway station, the wall temperature data of different areas in the subway station are obtained by means of zone detection, thereby ensuring the accuracy of the subsequent calculation of the condensation risk coefficient.

Optionally, in an embodiment of the present application, the acquisition period of the actual wall surface temperature of the wall surface of at least one target area is a preset period or determined by actual environmental parameters in the subway station.

It can be understood that, in the embodiment of the present application, the acquisition cycle of the actual wall surface temperature of the wall surface in at least one target area may be a preset cycle, or be set by those skilled in the art according to the actual environmental parameters in the subway station.

In step S102, the current indoor air dry-bulb temperature and current relative humidity of at least one target area are collected, and the corresponding current indoor air dew point temperature is calculated according to the current indoor air dry-bulb temperature and the current relative humidity.

In the actual implementation process, the embodiment of the present application can be based on different areas of the subway station (such as the wall floor of the entrance and exit passage, the wall floor of the station hall, the wall floor of the platform, the platform door and the wall floor of the equipment area in the subway station, etc., the embodiment of the application does not make specific The size of the area is limited), and the temperature and humidity sensors on the wall are evenly arranged to collect the air dry bulb temperature and relative humidity in different areas. Among them, the temperature and humidity sensor can be a dry bulb hygrometer, which can effectively ensure the accuracy and reliability of the control. In the embodiment of the present application, the air dew point temperature can be calculated according to the collected air dry bulb temperature and relative humidity. In the embodiment of the present application, aiming at the differences in air temperature and humidity in different areas of the subway station, the temperature and humidity data in the subway station are obtained through zone detection, thereby ensuring the accuracy of the subsequent calculation of the condensation risk coefficient.

In step S103, the condensation risk of each target area is evaluated based on the actual wall temperature of each area and the current air dew point temperature, the condensation risk coefficient of the subway station is obtained, and the water chiller in the subway station is controlled according to the condensation risk coefficient Target outlet water temperature.

In some cases, the embodiment of the present application can compare the collected wall and ground wall temperatures in different areas of the subway station with the air dew point temperature in the corresponding area, and then evaluate the condensation risk, and control the subway station according to the condensation risk coefficient. The target outlet water temperature of the chiller in the station.

According to the embodiment of the present application, the outlet water temperature strategy of the chiller is formulated according to the condensation risk factor F, which can increase the outlet water temperature of the chiller, reduce the dehumidification load, and improve the operating efficiency of the chiller while avoiding condensation in subway stations. It also greatly reduces the energy consumption of the ventilation and air conditioning system, and reduces the operating cost of the subway station.

Optionally, in an embodiment of the present application, controlling the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient includes: if the condensation risk coefficient is less than a preset threshold, then increasing the chiller based on a preset upward adjustment strategy Outlet water temperature; if the condensation risk factor is greater than or equal to the preset threshold, the outlet water temperature of the chiller will be lowered based on the preset down-regulation strategy.

In some specific embodiments, when the dew condensation risk coefficient F at the station ≥ the preset threshold value, the outlet water temperature of the chiller is lowered by 0.5°C, T _L =T _{L beginning} -0.5°C; when the condensation risk coefficient F at the station is less than the preset threshold value , the outlet water temperature of the chiller is increased by 0.5°C, and T _L =T _{L initial} +0.5°C.

Wherein, the preset threshold of condensation risk can be set by those skilled in the art according to the actual situation of the station, and no specific limitation is made here.

Optionally, in one embodiment of the present application, before controlling the target outlet water temperature of the chiller in the subway station according to the condensation risk coefficient, it also includes: collecting the current outdoor air dry-bulb temperature and the current relative humidity of the subway station; The current outdoor dry bulb temperature and the current outdoor wet bulb temperature corresponding to the current relative humidity calculation; Substitute the outdoor wet bulb temperature into the preset water temperature calculation model of the chiller to obtain the initial set value of the chiller outlet temperature and the maximum allowable adjustment value and The minimum value determines the default up-regulation strategy and default down-regulation strategy.

Specifically, in the embodiment of the present application, the outdoor average dry bulb temperature and relative humidity of the outdoor air can be obtained by collecting the outdoor air dry bulb temperature and relative humidity at terminals A and B of the subway station, and the actual measured value can be calculated based on the average dry bulb temperature and relative humidity of the air. Outdoor air wet bulb temperature T _{S measured outside} .

At the same time, the embodiment of the present application calculates the design outdoor wet-bulb temperature T _{Souter design} and the design indoor wet-bulb temperature T _{Sinner design} respectively according to the outdoor and indoor dry-bulb temperatures and relative humidity in the subway station ventilation and air-conditioning system design scheme.

Finally, in the embodiment of this application, the measured outdoor air wet bulb temperature, designed outdoor wet bulb temperature, and designed indoor wet bulb temperature are input into the calculation model of the outlet water temperature of the chiller, and the initial set value of the outlet water temperature of the chiller unit and the maximum allowable adjustment are calculated. value and minimum value. It can be understood that the adjustment range of the outlet water temperature of the chiller needs to be within the allowable maximum and minimum adjustment ranges. Specifically, when adjusting the outlet water temperature of the chiller according to the condensation risk coefficient in the embodiment of the present application, when the outlet water temperature of the chiller is lowered When the minimum allowable adjustment value T _min is reached, the operation is maintained at the minimum value T _min and no adjustment is made; when the outlet water temperature of the chiller reaches the maximum allowable adjustment value T _max , the operation is maintained at the maximum value T _max and no adjustment is made . In this embodiment of the present application, by calculating the initial set value of the outlet water temperature of the chiller and the maximum and minimum values allowed for adjustment, it is avoided that the outlet water temperature of the chiller is outside the maximum and minimum values allowed for adjustment, thereby affecting the service life of the chiller. This ensures the stability and safety of the chiller during subsequent operation.

Optionally, in an embodiment of the present application, the formula for calculating the condensation risk coefficient is:

Among them, F _i is the risk factor of condensation on the wall, T _bi is the wall temperature, T _di is the dew point temperature, i is different areas, area 1: i = 1, the entrance and exit passage wall ground; area 2: i = 2, the station hall wall Ground; area three: i=3, platform wall ground; area four: i=4, platform door; area five: i=5, equipment area wall ground.

Condensation risk factor at the station:

Among them, n1, n2, n3, n4, and n5 are the number of wall temperature monitoring points in areas 1, 2, 3, 4, and 5, respectively, and η _i is the influence factor of condensation risk in different areas on the overall condensation of the station, and i is Different areas, area 1: i=1, entrance and exit passage wall and ground; area 2: i=2, station hall wall and ground; area 3: i=3, platform wall and ground; area 4: i=4, platform door; area 5 : i=5, the wall and ground of the equipment area, the specific values of η _i are: η ₁ =0.3, η ₂ =0.2, η ₃ =0.3, η ₄ =0.1, η ₅ =0.1;

The formula for calculating the outlet water temperature of the preset chiller is:

T _Lmax =T _Lbegin + 2°C,

T _Lmin = T _{L initial} -2 ℃,

Among them, T _{S outside measured} is the measured outdoor air wet bulb temperature, T _{S outside design} is the design outdoor wet bulb temperature, and T _{S inside design} is the design indoor wet bulb temperature.

The working principle of the present application will be described in detail below with a specific embodiment.

The embodiment of the present application first collects the outdoor air dry bulb temperature and relative humidity at the A and B terminals of the subway station, obtains the outdoor average air dry bulb temperature and relative humidity, and calculates the measured outdoor air wet bulb according to the average air dry bulb temperature and relative humidity The temperature T _{s is measured outside} .

Secondly, the embodiment of the present application calculates the design outdoor wet bulb temperature T _{Souter design} and the design indoor wet bulb temperature T _Sinner design according to the outdoor and indoor dry bulb temperatures and relative humidity in the subway station ventilation and air conditioning system design scheme.

Again, in the embodiment of the present application, the measured outdoor air wet bulb temperature, the designed outdoor wet bulb temperature and the designed indoor wet bulb temperature are input into the calculation model of the outlet water temperature of the chiller, and the initial setting value of the outlet water temperature of the chiller unit and the maximum allowable adjustment are calculated. value and minimum value.

Among them, the calculation model of the outlet water temperature of the chiller is as follows:

Maximum allowable adjustment T _Lmax =T _Lbegin + 2°C;

Allow to adjust the minimum value T _Lmin = T _{L initial} -2 ℃.

After that, the embodiment of the present application collects the temperature of different areas of the subway station, specifically, the wall surface of the entrance and exit passage, the wall surface of the station hall, the wall surface of the platform, the wall surface of the platform door and the wall surface of the equipment area, and the wall surface temperature of the ground, according to the temperature of each area The wall surface temperature sensors are evenly arranged in the area.

At the same time, the embodiment of the present application also needs to collect the air dry bulb temperature and relative humidity of different areas of the subway station, specifically, the air dry-bulb temperature and relative humidity of the entrance and exit passage wall ground, station hall wall ground, platform wall ground, platform door and equipment area wall ground, and The temperature and humidity sensors are evenly arranged according to the size of each area, and the air dew point temperature is calculated according to the collected air dry bulb temperature and relative humidity.

Next, the embodiment of the present application compares the collected wall and ground wall temperatures in different areas of the subway station with the air dew point temperature in the corresponding area, such as the wall floor of the entrance and exit passage, the wall floor of the station hall, the wall floor of the platform, The temperature of the platform door and the wall and floor of the equipment area is compared with the air dew point temperature of the corresponding area, and the condensation risk is evaluated based on the comparison results, so as to determine the optimal water outlet temperature of the chiller, which can avoid condensation in the station. Increase the outlet water temperature of the chiller, thereby reducing the dehumidification load of the air conditioner, improving the operating efficiency of the chiller, greatly reducing the energy consumption of the air conditioning system, and reducing the operating cost of the subway station.

For example, the formula for calculating the risk coefficient of condensation on the wall in different areas is as follows:

Among them, F _i is the risk factor of condensation on the wall, T _bi is the wall temperature, T _di is the dew point temperature, i is different areas, area 1: i = 1, the entrance and exit passage wall ground; area 2: i = 2, the station hall wall Ground; area three: i=3, platform wall ground; area four: i=4, platform door; area five: i=5, equipment area wall ground.

Condensation risk factor at the station:

Among them, n1, n2, n3, n4, and n5 are the number of wall temperature monitoring points in areas 1, 2, 3, 4, and 5, respectively, and η _i is the influence factor of condensation risk in different areas on the overall condensation of the station, and i is Different areas, area 1: i=1, entrance and exit passage wall and ground; area 2: i=2, station hall wall and ground; area 3: i=3, platform wall and ground; area 4: i=4, platform door; area 5 : i=5, the wall and floor of the equipment area, the specific values of η _i are: η ₁ =0.3, η ₂ =0.2, η ₃ =0.3, η ₄ =0.1, η ₅ =0.1.

According to the embodiment of the present application, the outlet water temperature strategy of the chiller is formulated according to the condensation risk factor F, which can increase the outlet water temperature of the chiller, reduce the dehumidification load, and improve the operating efficiency of the chiller while avoiding condensation in subway stations. It also greatly reduces the energy consumption of the ventilation and air conditioning system, and reduces the operating cost of the subway station.

Finally, the embodiment of the present application adjusts the outlet water temperature of the chiller according to the calculated condensation risk coefficient. For example, when the condensation risk coefficient F ≥ the preset threshold at the station, the outlet water temperature of the chiller is lowered by 0.5°C, T _L =T _{L initial} -0.5 ℃, when the outlet water temperature of the chiller is adjusted down to the allowable minimum value T _min , it will maintain the minimum value T _min and no adjustment will be made; The temperature is increased by 0.5°C, T _L =T _{L initial} +0.5°C, when the outlet water temperature of the chiller reaches the maximum allowable adjustment T _max , it will maintain the maximum T _max operation and no longer adjust. In this embodiment of the present application, by calculating the initial set value of the outlet water temperature of the chiller and the maximum and minimum values allowed for adjustment, it is avoided that the outlet water temperature of the chiller is outside the maximum and minimum values allowed for adjustment, thereby affecting the service life of the chiller. This ensures the stability and safety of the chiller during subsequent operation.

It should be noted that the outdoor temperature and humidity, and the different areas of the station, specifically, can be the wall and ground temperature of the entrance and exit passage wall, the station hall wall, the platform wall, the platform door and the wall and ground of the equipment area, as well as the air temperature and humidity. The interval of data collection can be 10 minutes. After data collection, the embodiment of this application can compare and calculate the wall surface temperature and air dew point temperature in different areas, and after calculating the condensation risk coefficient at the station, adjust the outlet water temperature of the chiller every 30 minutes to avoid frequent adjustments The outlet water temperature of the chiller affects the safe operation of the chiller. It can be understood that the above-mentioned acquisition period and execution period can be adjusted accordingly by those skilled in the art according to the actual situation, and the values here are for reference only.

According to the embodiment of the present application, a method for controlling the outlet water temperature of a chiller in a subway station is proposed. In this method, according to the characteristics of different air temperature and humidity distributions in different areas of the subway station, so that the risk of condensation is different, by collecting different areas of the subway station Calculate the dew point temperature of the air in each area of the room, and evaluate the risk of condensation, so as to determine the optimal outlet water temperature of the chiller, which can increase the outlet water temperature of the chiller and reduce the air conditioner while avoiding condensation in the station. Dehumidification load, improve the operating efficiency of the chiller, greatly reduce the energy consumption of the air conditioning system, and reduce the operating cost of the subway station. Therefore, it solves the problem of low temperature on the wall surface of the subway station, large humidity load of personnel, and uneven temperature and humidity distribution in different areas. According to the traditional control method of outlet water temperature of the chiller, the air-conditioning system energy consumption of the subway station is prone to condensation or excessive dehumidification is too high. question.

Next, the outlet water temperature control device of the chiller in a subway station proposed according to the embodiment of the present application will be described with reference to the accompanying drawings.

Fig. 2 is a schematic block diagram of an outlet water temperature control device of a chiller in a subway station according to an embodiment of the present application.

As shown in FIG. 2 , the control device 10 for outlet water temperature of a chiller in a subway station includes: an acquisition module 100 , a calculation module 200 and a control module 300 .

Specifically, the collection module 100 is configured to collect the actual wall surface temperature of the wall surface of at least one target area in the subway station.

The calculation module 200 is configured to collect the current indoor air dry-bulb temperature and current relative humidity of at least one target area, and calculate the corresponding current indoor air dew point temperature according to the current indoor air dry-bulb temperature and the current relative humidity.

The control module 300 is configured to evaluate the condensation risk of each target area based on the actual wall surface temperature and the current air dew point temperature of each area, obtain the condensation risk coefficient of the subway station, and control the chiller in the subway station according to the condensation risk coefficient target water temperature.

Optionally, in one embodiment of the present application, the control module 300 is further configured to: if the condensation risk coefficient is less than a preset threshold, then increase the outlet water temperature of the chiller based on a preset upward adjustment strategy; if the condensation risk coefficient is greater than or equal to If the preset threshold is set, the outlet water temperature of the chiller is lowered based on the preset lowering strategy.

Optionally, in an embodiment of the present application, the calculation module 200 further includes: a collection unit, a calculation unit, and a generation unit.

Wherein, the collection unit is used to collect the current outdoor air dry-bulb temperature and the current relative humidity of the subway station.

The calculation unit is configured to calculate the corresponding current outdoor wet bulb temperature according to the current outdoor air dry bulb temperature and the current relative humidity.

The generation unit is used to substitute the outdoor wet bulb temperature into the calculation model of the outlet water temperature of the preset chiller, obtain the initial set value of the outlet water temperature of the chiller unit and the maximum and minimum values allowed for adjustment, and determine the preset upward adjustment strategy and preset downward adjustment strategy.

Optionally, in an embodiment of the present application, the formula for calculating the condensation risk coefficient is:

Among them, F _i is the risk factor of condensation on the wall, T _bi is the wall temperature, T _di is the dew point temperature, i is different areas, area 1: i = 1, the entrance and exit passage wall ground; area 2: i = 2, the station hall wall Ground; area three: i=3, platform wall ground; area four: i=4, platform door; area five: i=5, equipment area wall ground.

Condensation risk factor at the station:

Among them, n1, n2, n3, n4, and n5 are the number of wall temperature monitoring points in areas 1, 2, 3, 4, and 5, respectively, and η _i is the influence factor of condensation risk in different areas on the overall condensation of the station, and i is Different areas, area 1: i=1, entrance and exit passage wall and ground; area 2: i=2, station hall wall and ground; area 3: i=3, platform wall and ground; area 4: i=4, platform door; area 5 : i=5, the wall and ground of the equipment area, the specific values of η _i are: η ₁ =0.3, η ₂ =0.2, η ₃ =0.3, η ₄ =0.1, η ₅ =0.1;

The formula for calculating the outlet water temperature of the preset chiller is:

T _Lmax =T _Lbegin + 2°C,

T _Lmin = T _{L initial} -2 ℃,

Among them, T _{S outside measured} is the measured outdoor air wet bulb temperature, T _{S outside design} is the design outdoor wet bulb temperature, and T _{S inside design} is the design indoor wet bulb temperature.

Optionally, in an embodiment of the present application, the collection period of the collection module 100 is a preset period or determined by actual environmental parameters in the subway station.

It should be noted that the foregoing explanations on the embodiment of the method for controlling the outlet water temperature of the subway station chiller are also applicable to the apparatus for controlling the outlet water temperature of the subway station chiller in this embodiment, and will not be repeated here.

According to the water temperature control device of the subway station chiller set proposed in the embodiment of the present application, aiming at the different distribution of air temperature and humidity in different areas of the subway station, so that the risk of condensation is different, by collecting the air temperature and humidity in different areas of the subway station, the indoor air temperature and humidity are calculated. Air dew point temperature in each area, and assess the risk of condensation, so as to determine the optimal outlet water temperature of the chiller, which can increase the outlet water temperature of the chiller while avoiding condensation in the station, thereby reducing the dehumidification load of the air conditioner and improving the operation of the chiller Efficiency, greatly reducing the energy consumption of the air-conditioning system and reducing the operating cost of the subway station. Therefore, it solves the problem of low temperature on the wall surface of the subway station, large humidity load of personnel, and uneven temperature and humidity distribution in different areas. According to the traditional control method of outlet water temperature of the chiller, the air-conditioning system energy consumption of the subway station is prone to condensation or excessive dehumidification is too high. question.

FIG. 3 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. This electronic equipment can include:

A memory 301 , a processor 302 , and a computer program stored in the memory 301 and executable on the processor 302 .

When the processor 302 executes the program, the method for controlling the outlet water temperature of the chiller in the subway station provided in the above embodiments is realized.

Further, the electronic equipment also includes:

The communication interface 303 is used for communication between the memory 301 and the processor 302 .

The memory 301 is used to store computer programs that can run on the processor 302 .

The memory 301 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 301, the processor 302, and the communication interface 303 are implemented independently, the communication interface 303, the memory 301, and the processor 302 may be connected to each other through a bus to complete mutual communication. The bus may be an Industry Standard Architecture (Industry Standard Architecture, ISA for short) bus, a Peripheral Component Interconnect (PCI for short) bus, or an Extended Industry Standard Architecture (EISA for short) bus. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 3 , but it does not mean that there is only one bus or one type of bus.

Optionally, in terms of specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on one chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through the internal interface.

The processor 302 may be a central processing unit (Central Processing Unit, referred to as CPU), or a specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or configured to implement one or more of the embodiments of the present application integrated circuit.

This embodiment also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the above method for controlling the outlet water temperature of a chiller in a subway station is realized.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or N embodiments or examples in an appropriate manner. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a custom logical function or step of a process , and the scope of preferred embodiments of the present application includes additional implementations in which functions may be performed out of the order shown or discussed, including in substantially simultaneous fashion or in reverse order depending on the functions involved, which shall It should be understood by those skilled in the art to which the embodiments of the present application belong.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment for use. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connection with one or N wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that each part of the present application may be realized by hardware, software, firmware or a combination thereof. In the above embodiments, the N steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: a discrete Logic circuits, ASICs with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (8)

1. A method for controlling the temperature of the outlet water of a water chilling unit of a subway station is characterized by comprising the following steps:

acquiring the actual wall surface temperature of the wall surface of at least one target area in the subway station;

acquiring the current indoor air dry bulb temperature and the current relative humidity of the at least one target area, and calculating the corresponding current indoor air dew point temperature according to the current indoor air dry bulb temperature and the current relative humidity; and

evaluating the dewing risk of each target area based on the actual wall surface temperature of each area and the current indoor air dew point temperature, acquiring a dewing risk coefficient of the subway station, acquiring the current outdoor air dry bulb temperature and the current relative humidity of the subway station, calculating the corresponding current outdoor wet bulb temperature according to the current outdoor air dry bulb temperature and the current relative humidity, substituting the outdoor wet bulb temperature into a preset water chilling unit outlet temperature calculation model to obtain a water chilling unit outlet temperature initial set value and a maximum value and a minimum value allowed to be adjusted, determining a preset up-regulation strategy and a preset down-regulation strategy, controlling the target water outlet temperature of a water chilling unit in the subway station according to the dewing risk coefficient, and if the dewing risk coefficient is smaller than a preset threshold value, up-regulating the water chilling unit outlet temperature based on the preset up-regulation strategy;

and if the dewing risk coefficient is larger than or equal to the preset threshold value, the outlet water temperature of the water chilling unit is adjusted downwards based on the preset downwards adjusting strategy.

2. The method according to claim 1, wherein the condensation risk factor is calculated by the formula:

wherein, F_iIs the risk coefficient of wall condensation, T_biIs the wall temperature, T_diDew point temperature, i is the different zones, zone one: i =1, entrance and exit passageway wall and floor; and area two: i =2, standing hall wall ground; and (3) area three: i =3, platform wall ground; and area four: i =4, platform door; area five: i =5, equipment area wall ground;

station condensation risk coefficient:

wherein n1, n2, n3, n4 and n5 are the number of wall temperature monitoring point positions of the first, second, third, fourth and fifth areas respectively, eta_iFor the influence factor of the condensation risk of different areas on the whole condensation of the station, i is different area, area one: i =1, entrance and exit passageway wall and floor; and a second area: i =2, standing hall wall ground; and a third area: i =3, platform wall ground; and area four: i =4, platform door; area five: i =5, equipment area wall and ground, η_iThe specific numerical values are: eta₁＝0.3，η₂＝0.2，η₃＝0.3，η₄＝0.1，η₅＝0.1；

The calculation formula of the preset water chilling unit outlet temperature calculation model is as follows:

T_Lmax＝T_{l initial}+2℃，

T_Lmin＝T_{L is original}-2℃，

Wherein, T_{S external actual measurement}For actually measuring the outdoor air wet bulb temperature, T_{S peripheral equipment}To design the outdoor wet bulb temperature, T_{S inner design}To design the indoor wet bulb temperature.

3. The method according to claim 1 or 2, wherein the acquisition cycle of the actual wall temperature of the wall and the ground of the at least one target area is a preset cycle or is determined by actual environmental parameters in the subway station.

4. The utility model provides a subway station cooling water set goes out water temperature control device which characterized in that includes:

the system comprises an acquisition module, a display module and a control module, wherein the acquisition module is used for acquiring the actual wall surface temperature of the wall surface of at least one target area in the subway station;

the calculation module is used for acquiring the current indoor air dry bulb temperature and the current relative humidity of the at least one target area and calculating the corresponding current indoor air dew point temperature according to the current indoor air dry bulb temperature and the current relative humidity; and

the control module is used for evaluating the condensation risk of each target area based on the actual wall surface temperature of each area and the current indoor air dew point temperature, acquiring a condensation risk coefficient of the subway station, acquiring the current outdoor air dry bulb temperature and the current relative humidity of the subway station, calculating the corresponding current outdoor wet bulb temperature according to the current outdoor air dry bulb temperature and the current relative humidity, substituting the outdoor wet bulb temperature into a preset water chilling unit outlet temperature calculation model to obtain a water chilling unit outlet temperature initial set value and an allowable regulation maximum value and a minimum value, determining a preset up-regulation strategy and a preset down-regulation strategy, controlling the target water outlet temperature of the water chilling unit in the station according to the condensation risk coefficient, and if the condensation risk coefficient is smaller than a preset threshold value, up-regulating the water chilling unit outlet temperature based on the preset up-regulation strategy;

and if the dewing risk coefficient is larger than or equal to the preset threshold value, the outlet water temperature of the water chilling unit is adjusted downwards based on the preset downwards adjusting strategy.

5. The apparatus according to claim 4, wherein the dew condensation risk coefficient is calculated by the formula:

wherein, F_iIs the risk coefficient of wall condensation, T_biIs the wall temperature, T_diDew point temperature, i is the different zones, zone one: i =1, entrance and exit passageway wall and floor; and a second area: i =2, standing hall wall ground; and (3) area three: i =3, platform wall ground; and area four: i =4, platform door; area five: i =5, equipment area wall ground;

station condensation risk coefficient:

wherein n1, n2, n3, n4 and n5 are the number of wall temperature monitoring point positions of the first, second, third, fourth and fifth areas respectively, eta_iFor the influence factor of the condensation risk of different areas on the whole condensation of the station, i is different area, area one: i =1, entrance and exit passageway wall ground; and a second area: i =2, standing hall wall ground; and (3) area three: i =3, platform wall ground; and area four: i =4, platform door; area five: i =5, equipment area wall and ground, η_iThe specific numerical values are: eta₁＝0.3，η₂＝0.2，η₃＝0.3，η₄＝0.1，η₅＝0.1；

The calculation formula of the preset water chilling unit outlet temperature calculation model is as follows:

T_Lmax＝T_{l is original}+2℃，

T_Lmin＝T_{L is original}-2℃，

Wherein, T_{S external test}For actually measuring the outdoor air wet bulb temperature, T_{S peripheral equipment}To design the outdoor wet bulb temperature, T_{S inner design}To design the indoor wet bulb temperature.

6. The device according to claim 4, wherein the acquisition cycle of the acquisition module is a preset cycle or is determined by actual environmental parameters in the subway station.

7. An electronic device, comprising: the system comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the method for controlling the outlet water temperature of the water chilling unit of the subway station as claimed in any one of claims 1-3.

8. A computer-readable storage medium, on which a computer program is stored, wherein the program is executed by a processor for implementing the method for controlling the outlet water temperature of a chiller of a subway station as claimed in any one of claims 1-3.

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