A cooling circulating water system and optimization method thereof

Abstract

The present invention relates to a cooling circulating water system and an optimization method thereof, wherein the system comprises: a cooling tower, a circulating water pool, a plurality of coolers, a controller and a plurality of intelligent valve groups; each of the coolers is connected to the cooling tower; each of the coolers is connected to the circulating water pool through an intelligent valve group; the cooling tower is connected to the circulating water pool; the controller is respectively connected to the circulating water pool and each of the intelligent valve groups; each of the coolers is used to cool the load water through circulating water; the cooling tower is used to perform evaporative cooling on the circulating water; the circulating water pool is used to perform convection cooling on the circulating water; the controller controls the flow rate of the circulating water in each of the coolers through each of the intelligent valve groups, and the controller is also used to control the water intake of the circulating water when the circulating water pool performs convection cooling. The present invention greatly reduces the energy consumption during the cooling cycle.

Description

Technical Field

[0001] The invention relates to the technical field of circulating cooling, and in particular to a cooling circulating water system and an optimization method thereof. Background Art

[0002] A large amount of energy is required in industrial production. As time goes by, the heat dissipation will gradually increase, causing the temperature of the equipment to gradually rise during operation. In order to maintain the normal operation of the equipment, a corresponding cooling system needs to be configured to cool the equipment. The circulating cooling water system is one of the most efficient and widely used cooling systems at this stage.

[0003] In the design and selection process of the circulating cooling water system, the project will configure the relevant parameters of the circulating cooling water system according to the maximum production capacity. However, in the actual production process, the demand for the circulating cooling water system will be affected by factors such as seasonal changes, changes in production capacity, and production rhythm.

[0004] At the same time, the distribution of cooling water consumes a lot of energy. At present, the system only uses the most basic energy-saving control such as frequency converter, but the overall system operation efficiency is low, the product homogeneity is serious, the margin cannot be accurately eliminated, and the real-time pipe resistance cannot be saved, which results in a large amount of water resources and electricity waste. Summary of the invention

[0005] In view of this, the present invention provides a cooling circulating water system and an optimization method thereof, which greatly reduces the energy consumption in the cooling circulation process.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A cooling circulating water system, comprising: a cooling tower, a circulating water pool, a plurality of coolers, a controller and a plurality of intelligent valve groups;

[0008] Each of the coolers is connected to the cooling tower; each of the coolers is connected to the circulating water pool through one of the intelligent valve groups;

[0009] The cooling tower is connected to the circulating water pool; the controller is connected to the circulating water pool and each of the intelligent valve groups respectively;

[0010] Each of the coolers is used to cool the load water through circulating water;

[0011] The cooling tower is used to perform evaporative cooling on the circulating water; the circulating water pool is used to perform convection cooling on the circulating water;

[0012] The controller controls the flow rate of circulating water in each of the coolers through each of the intelligent valve groups. The controller is also used to control the water inflow of circulating water when the circulating water pool performs convection cooling.

[0013] Preferably, the intelligent valve group includes a plurality of intelligent valves, and the plurality of intelligent valves are connected in series and / or in parallel to the circulating water pool and the cooler;

[0014] Each of the smart valves is connected to the controller; the controller controls the flow of circulating water in the cooler through each of the smart valves.

[0015] Preferably, the circulating water pool comprises a water pool and a first intelligent pump;

[0016] The water pool is connected to the water supply pipeline through the first intelligent pump; the water pool is used to perform convection cooling on the circulating water;

[0017] The water pool is connected to the cooling tower; each of the coolers is connected to the water pool through one of the smart valve groups;

[0018] The first intelligent pump is connected to the controller, and the controller controls the water inflow of circulating water when the pool performs convection cooling through the first intelligent pump.

[0019] Preferably, each of the coolers is connected to the cooling tower via an intelligent pump set.

[0020] Preferably, the system further comprises:

[0021] A flow sensor group, used for acquiring the flow of load water in each of the coolers and sending it to the controller;

[0022] The temperature sensor group is used to obtain the input temperature and output temperature of the circulating water and the load water in each cooler and send them to the controller.

[0023] The present invention also provides an optimization method for a cooling circulating water system, the optimization method being applicable to the above-mentioned system, the optimization method comprising:

[0024] Based on the input temperature and output temperature of the circulating water and load water in each cooler, the flow rate of the circulating water in each cooler is adjusted. When the exchange efficiency of each cooler reaches the maximum value, the current flow rate of the circulating water in each cooler is determined to be the optimal flow rate of the circulating water in each cooler.

[0025] Preferably, the optimization method further comprises:

[0026] Adjust the evaporation of the cooling tower and the water inflow of the circulating water pool, and when the sum of the optimal flow of the circulating water in each cooler, the evaporation of the cooling tower and the power output generated by the water inflow of the circulating water pool and the water inflow of the circulating water pool reaches a minimum value, determine the current evaporation of the cooling tower as the optimal evaporation of the cooling tower; determine the water inflow of the circulating water pool as the optimal water inflow of the circulating water pool;

[0027] The water inflow of the circulating water pool is the sum of the evaporation of the cooling tower and the water outflow of the circulating water pool.

[0028] Preferably, the optimization method further comprises:

[0029] The intelligent valve group maintains a constant pressure between the circulating water pool and the cooler.

[0030] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0031] The present invention relates to a cooling circulating water system and an optimization method thereof, wherein the system comprises: a cooling tower, a circulating water pool, a plurality of coolers, a controller and a plurality of intelligent valve groups; each of the coolers is connected to the cooling tower; each of the coolers is connected to the circulating water pool through an intelligent valve group; the cooling tower is connected to the circulating water pool; the controller is respectively connected to the circulating water pool and each of the intelligent valve groups; each of the coolers is used to cool the load water through circulating water; the cooling tower is used to perform evaporative cooling on the circulating water; the circulating water pool is used to perform convection cooling on the circulating water; the controller controls the flow rate of the circulating water in each of the coolers through each of the intelligent valve groups, and the controller is also used to control the water intake of the circulating water when the circulating water pool performs convection cooling. The present invention greatly reduces the energy consumption during the cooling cycle. . BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 This is a structural diagram of the cooling circulating water system of the present invention;

[0034] Figure 2 This is a schematic diagram of the relationship between the flow rate of circulating water returned to the cooling tower and the number of intelligent pump groups in the present invention.

[0035] Explanation of symbols: 1-cooling tower, 2-circulating water pool, 3-cooler, 4-intelligent valve group, 5-intelligent pump group, 21-water pool, 22-first intelligent pump. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide a cooling water circulation system and an optimization method thereof, which greatly reduces the energy consumption in the cooling circulation process.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 FIG. 1 is a structural diagram of the cooling circulating water system of the present invention. Figure 1 As shown, the present invention provides a cooling circulating water system, including: a cooling tower 1, a circulating water pool 2, a plurality of coolers 3, a controller, a plurality of intelligent valve groups 4, an intelligent pump group 5, a flow sensor group and a temperature sensor group. Figure 1 In the figure, P is the number of coolers 3.

[0040] The circulating water pool 2 includes a water pool 21 and a first smart pump 22 .

[0041] Each of the coolers 3 is connected to the water pool 21 via one of the smart valve groups 4; each of the coolers 3 is connected to the cooling tower 1 via the smart pump group 5. Preferably, the smart pump group 5 includes a plurality of second smart pumps, and the plurality of second smart pumps are connected to each of the coolers 3 and the cooling tower 1 in series and / or in parallel.

[0042] The cooling tower 1 is connected to the water pool 21 ; the water pool 21 is connected to a water supply pipeline through the first intelligent pump 22 .

[0043] Each of the coolers 3 is used to cool the load water by circulating water; the water pool 21 is used to perform convection cooling on the circulating water; and the cooling tower 1 is used to perform evaporative cooling on the circulating water.

[0044] The smart valve group 4 includes a plurality of smart valves; the plurality of smart valves are connected in series and / or in parallel to the water pool 21 and the cooler 3 .

[0045] Each of the smart valves is connected to the controller; the controller controls the flow of circulating water in the cooler 3 through each of the smart valves.

[0046] The first intelligent pump 22 is connected to the controller, and the controller controls the water inflow of circulating water when the pool 21 performs convection cooling through the first intelligent pump 22 .

[0047] The flow sensor group is used to obtain the flow of load water in each of the coolers 3 and send it to the controller.

[0048] Specifically, the flow sensor group includes a plurality of flow sensors, and the number of the flow sensors is the same as the number of the coolers 3. Each of the flow sensors measures the flow of the load water in one of the coolers 3 and sends the flow to the controller.

[0049] The temperature sensor group is used to obtain the input temperature and output temperature of the circulating water and the load water in each of the coolers 3 and send them to the controller.

[0050] Furthermore, the temperature sensor group includes a plurality of temperature sensors, the number of the temperature sensors being four times the number of the coolers 3, that is, each cooler 3 corresponds to four temperature sensors, and the four temperature sensors are respectively used to obtain the input temperature of the circulating water, the output temperature of the circulating water, the output temperature of the load water and the input temperature of the load water in each cooler 3 and send them to the controller.

[0051] The present invention also provides an optimization method for a cooling circulating water system, the optimization method being applicable to the above-mentioned system, the optimization method comprising:

[0052] Based on the input temperature and output temperature of the circulating water and load water in each of the coolers, the flow rate of the circulating water in each of the coolers is adjusted. When the exchange efficiency of each of the coolers reaches a maximum value, the current flow rate of the circulating water in each of the coolers is determined to be the optimal flow rate of the circulating water in each of the coolers.

[0053] Preferably, the specific calculation formula is as follows:

[0054]

[0055] Where: is the flow rate of circulating water in the i-th cooler, T ai is the output temperature of the circulating water in the i-th cooler, T bi is the input temperature of the circulating water in the i-th cooler, is the flow rate of load water in the i-th cooler, ε i is the exchange efficiency of the i-th cooler, T hi is the input temperature of the load water in the i-th cooler, T ci is the output temperature of the load water in the i-th cooler, i∈P.

[0056] Adjust the evaporation amount of the cooling tower and the water inlet amount of the water pool. When the sum of the optimal flow rate of circulating water in each cooler, the evaporation amount of the cooling tower and the water inlet amount of the water pool, and the water inlet amount of the water pool reaches a minimum value, determine the current evaporation amount of the cooling tower as the optimal evaporation amount of the cooling tower; determine the water inlet amount of the water pool as the optimal water inlet amount of the water pool.

[0057] The water inflow of the circulating water pool is the sum of the evaporation of the cooling tower and the water outflow of the circulating water pool.

[0058] Specifically, the calculation formula for the power output generated by the optimal flow rate of circulating water in each cooler, the evaporation amount of the cooling tower and the water inflow of the circulating water pool is as follows:

[0059]

[0060] Where: p e is the power output required per unit water volume, C e is the total power output, λ is the evaporation coefficient, is the water inflow of the pool, is the evaporation capacity of the cooling tower.

[0061] Furthermore, there is a set pressure value between the water pool and each of the coolers, and each of the smart valves in the smart valve group communicates with the Internet of Things to achieve constant pressure control of the current line. When the working conditions change, each of the smart valves performs adaptive adjustment.

[0062] Preferably, when the flow rate of the circulating water returned to the cooling tower is too large, the intelligent pump group is provided with a plurality of the second intelligent pumps, and the relationship between the number of the second intelligent pumps and the flow rate of the circulating water returned to the cooling tower is as follows: Figure 2 As shown, the number of the second smart pumps is selected according to the actual return flow rate.

[0063] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cooling circulating water system, characterized in that: include: Cooling tower, circulating water pool, several coolers, controllers and several intelligent valve groups; Each of the coolers is connected to the cooling tower; each of the coolers is connected to the circulating water pool through one of the intelligent valve groups; The cooling tower is connected to the circulating water pool; the controller is connected to the circulating water pool and each of the intelligent valve groups respectively; Each of the coolers is used to cool the load water through circulating water; The cooling tower is used to perform evaporative cooling on the circulating water; the circulating water pool is used to perform convection cooling on the circulating water; The controller controls the flow rate of circulating water in each of the coolers through each of the intelligent valve groups, and the controller is also used to control the water inflow of circulating water when the circulating water pool performs convection cooling; The intelligent valve group includes a plurality of intelligent valves, and the plurality of intelligent valves are connected to the circulating water pool and the cooler in a serial and / or parallel manner; Each of the smart valves is connected to the controller; the controller controls the flow rate of circulating water in the cooler through each of the smart valves; The circulating water pool includes a water pool and a first intelligent pump; The water pool is connected to the water supply pipeline through the first intelligent pump; the water pool is used to perform convection cooling on the circulating water; The water pool is connected to the cooling tower; each of the coolers is connected to the water pool through one of the smart valve groups; The first intelligent pump is connected to the controller, and the controller controls the water inflow of circulating water when the pool performs convection cooling through the first intelligent pump.

2. The cooling circulating water system according to claim 1, characterized in that: Each of the coolers is connected to the cooling tower via an intelligent pump group.

3. The cooling circulating water system according to claim 1, characterized in that: The system further comprises: A flow sensor group, used for acquiring the flow of load water in each of the coolers and sending it to the controller; The temperature sensor group is used to obtain the input temperature and output temperature of the circulating water and the load water in each cooler and send them to the controller.

4. A method for optimizing a cooling circulating water system, the method being applicable to the system according to any one of claims 1 to 3, characterized in that: The optimization method comprises: Based on the input temperature and output temperature of the circulating water and the load water in each cooler, the flow rate of the circulating water in each cooler is adjusted, and when the exchange efficiency of each cooler reaches a maximum value, the current flow rate of the circulating water in each cooler is determined to be the optimal flow rate of the circulating water in each cooler; Adjust the evaporation of the cooling tower and the water inflow of the circulating water pool, and when the sum of the optimal flow of the circulating water in each cooler, the evaporation of the cooling tower and the power output generated by the water inflow of the circulating water pool and the water inflow of the circulating water pool reaches a minimum value, determine the current evaporation of the cooling tower as the optimal evaporation of the cooling tower; determine the water inflow of the circulating water pool as the optimal water inflow of the circulating water pool; The water inflow of the circulating water pool is the sum of the evaporation of the cooling tower and the water outflow of the circulating water pool.

5. The optimization method according to claim 4, characterized in that: The optimization method further comprises: The intelligent valve group maintains a constant pressure between the circulating water pool and the cooler.

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