Efficient cooling system based on cooling water circulation route optimization

Abstract

The utility model provides an efficient cooling system based on cooling water circulation route optimization, which comprises a plurality of cooling tower groups, a plurality of water pumps, a plurality of water pipes, a plurality of temperature measuring devices, a plurality of first valves and a PID (Proportion Integration Differentiation) controller, under partial load of the refrigeration station, the number of running cooling towers is automatically and accurately adjusted, and disordered starting of the cooling tower group is avoided; while safe and reliable operation of the cooling system is guaranteed, operation efficiency of the cooling tower set is improved, operation energy consumption of the refrigerating unit is reduced, and energy efficiency of the refrigerating station system is improved.

Description

Technical Field

[0001] The utility model relates to a cooling system, in particular to a high-efficiency cooling system based on cooling water circulation route optimization. Background Art

[0002] A refrigeration station is generally composed of a refrigeration unit, a chilled water pump, a cooling water pump, a cooling tower, a piping system and terminal cooling equipment. Although the cooling tower accounts for less than 5% of the energy consumption of the entire refrigeration station, whether the cooling tower can be highly efficient and energy-saving is one of the important factors that determine whether the refrigeration station can operate efficiently.

[0003] The inlet and outlet pipes of existing cooling towers are both equipped with manual butterfly valves. When the total amount of heat to be processed is lower than the total load of the system (i.e., partial load), only part of the cooling tower needs to be operated. However, the manual closure of the manual butterfly valve will cause the following problems: (1) Before the system is officially operated, the amount of cooling water entering each cooling tower needs to be balanced by adjusting the opening size of the manual butterfly valve. Since most operators lack professional HVAC knowledge, it is easy to destroy the original hydraulic balance, and the outlet water temperature after the cooling water flows through each cooling tower is inconsistent; (2) On-site operators often lack knowledge of valve operation and are prone to mistakenly closing or closing the manual butterfly valve, resulting in engineering accidents such as cooling tower evacuation; (3) Therefore, in a large number of engineering practices, when the system is operated at partial load, due to problems such as inconvenient operation, if there is no guidance from professional operation and maintenance personnel, on-site operators will not adjust the number of cooling towers in operation or open and close the manual butterfly valve according to the system load.

[0004] Therefore, when the system is partially loaded, only part of the cooling water flows into the working cooling tower to be cooled to low-temperature cooling water, while a large amount of cooling water flows into the non-working cooling tower. This part of cooling water cannot be cooled normally and remains as high-temperature cooling water. The low-temperature cooling water after the cooling is often much smaller than the high-temperature cooling water that has not been cooled. The water temperatures of the two are neutralized after they meet in the cooling return pipe, resulting in the cooling system being unable to provide the refrigeration unit with sufficiently low cooling water. The refrigeration unit consumes high energy, the cooling tower does not play an effective role, and the overall operating efficiency of the refrigeration station is low. Utility Model Content

[0005] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the utility model is to provide a high-efficiency cooling system based on the optimization of the cooling water circulation route, which is used to solve the problems of unchanged operation, erroneous operation and the resulting low operating efficiency of the refrigeration station caused by the installation of manual butterfly valves on the inlet and outlet water pipes of the cooling tower in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides an efficient cooling system based on the optimization of cooling water circulation route, comprising a plurality of cooling tower groups, a plurality of water pumps, a plurality of water pipes, a plurality of temperature measuring devices, a plurality of first valves and a PID controller; wherein the water pipe comprises a cooling water supply main pipe, a cooling water return main pipe, a plurality of cooling tower water inlet pipes and a plurality of cooling tower water outlet pipes; each cooling tower group is connected with a cooling tower water inlet pipe and a cooling tower water outlet pipe; the cooling water supply main pipe is connected with each cooling tower water inlet pipe, and the cooling water return main pipe is connected with each cooling tower water outlet pipe; cooling water flows from the cooling water supply main pipe into each cooling tower water inlet pipe and then enters each cooling tower group, and after cooling down in the cooling tower group, it is discharged from the cooling tower water outlet pipe of each cooling tower group and converges to the cooling water return main pipe; the plurality of water pumps are connected with the cooling water supply main pipe; the PID controller is electrically connected with the water pump to control the water pump working frequency; the temperature measuring device includes a first temperature measuring device and a second temperature measuring device, the first temperature measuring device is arranged in the air outside the cooling tower group to measure the air temperature, and the second temperature measuring device is arranged in the cooling return water main to measure the cooling return water temperature; the first valve is an electric valve, and the first valve includes a plurality of cooling tower water inlet pipe first valves and a plurality of cooling tower water outlet pipe first valves; each of the cooling tower water inlet pipe first valves is arranged at each cooling tower water inlet pipe, and each of the cooling tower water outlet pipe first valves is arranged at each cooling tower water outlet pipe; the PID controller is electrically connected to the first temperature measuring device and the second temperature measuring device to receive temperature information, and is electrically connected to each of the cooling tower water inlet pipe first valves and the cooling tower water outlet pipe first valve to control the opening and closing and opening size of the cooling tower water inlet pipe first valve and the cooling tower water outlet pipe first valve.

[0007] In one embodiment of the present invention, the water pipe further includes a connecting main pipe and a plurality of connecting branch pipes, wherein the connecting branch pipes are respectively connected to each cooling tower group and are connected and converged into the connecting main pipe.

[0008] In one embodiment of the utility model, the first valve also includes a connecting branch first valve, and each connecting branch first valve is respectively arranged in each connecting branch; the PID controller is electrically connected to each connecting branch first valve to control the opening and closing and opening size of the connecting branch first valve.

[0009] In one embodiment of the present invention, the first temperature measuring device includes a wet-bulb temperature sensor.

[0010] In an embodiment of the present invention, the water pump comprises a variable frequency water pump.

[0011] In one embodiment of the present invention, a plurality of second valves are further included. The second valves may be manual valves or electric valves or a combination of the two.

[0012] In one embodiment of the utility model, the second valve includes: a plurality of cooling tower water inlet pipe second valves and a plurality of cooling tower water outlet pipe second valves; each cooling tower water inlet pipe second valve is respectively arranged at each cooling tower water inlet pipe, and each cooling tower water outlet pipe second valve is respectively arranged at each cooling tower water outlet pipe.

[0013] In one embodiment of the present invention, the second valve further comprises: a plurality of connecting branch pipe second valves; each connecting branch pipe second valve is respectively arranged at each connecting branch pipe.

[0014] In one embodiment of the present invention, the type of the first valve includes any one or more of the following: a ball valve, a butterfly valve, a gate valve, a stop valve, a balancing valve, a diaphragm valve, a pressure reducing valve, a two-way valve, and a three-way valve.

[0015] In one embodiment of the present invention, each cooling tower assembly includes a motor and a fan.

[0016] As described above, the utility model has the following beneficial effects:

[0017] This solution only changes the first valve in the cooling system from a manual valve to an electric valve on the original basis, so as to realize automatic and precise adjustment of the number of cooling towers in operation under partial load of the refrigeration station, and avoid disorderly opening of the cooling tower group; while ensuring the safe and reliable operation of the cooling system, by improving the operating efficiency of the cooling tower group, reducing the operating energy consumption of the refrigeration unit, and improving the energy efficiency of the refrigeration station system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a structural diagram of a high-efficiency cooling system based on cooling water circulation route optimization of the utility model.

[0019] Figure 2 It shows a schematic diagram of the electrical connection between the PID controller of the utility model and the controlled structure.

[0020] Component number description:

[0021] 1 Cooling tower group

[0022] 2 Water pipes

[0023] 21 Cooling tower water inlet pipe

[0024] 22 Cooling tower outlet pipe

[0025] 231 Connecting main pipe

[0026] 232 connecting branch pipe

[0027] 24 Cooling water supply main

[0028] 25 Cooling return water main

[0029] 3 Water Pump

[0030] 4 Temperature measurement device

[0031] 41. First temperature measuring device

[0032] 42. Second temperature measuring device

[0033] 5. First Valve

[0034] 51 Cooling tower water inlet pipe first valve

[0035] 52 Cooling tower outlet pipe first valve

[0036] 53 Connecting branch pipe first valve

[0037] 6 PID controller DETAILED DESCRIPTION

[0038] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0039] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in this utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the technical solution in the embodiments of the present invention is further described in detail through the following embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the invention.

[0043] like Figure 1 As shown, in order to achieve the above-mentioned purpose, the utility model provides a high-efficiency cooling system based on the optimization of cooling water circulation route; Figure 2 The figure shows the electrical connection between the PID controller and the controlled structure of the utility model. Figure 1 and Figure 2 The structure and principle of the efficient cooling system based on the optimization of cooling water circulation route provided by the utility model are explained in detail. It includes multiple cooling tower groups 1, a plurality of water pipes 2, a plurality of water pumps 3, a plurality of temperature measuring devices 4, a plurality of first valves 5 and a PID controller 6; Figure 1 It can be seen that there are 8 cooling tower groups 1 in this embodiment, namely cooling tower group 11, cooling tower group 12, ..., cooling tower group 18, but the number of cooling tower groups 1 in this embodiment does not constitute a limitation on the number of cooling tower groups 1 in this application, and the specific number of cooling tower groups 1 can be adjusted according to actual heat dissipation requirements. Figure 1 In the embodiment shown, a square cross-flow interconnecting cooling tower group 1 is provided for use in reducing the floor space when the design load is large. The characteristic is that the cold air enters from one side of the filler and exits from the opposite side, flowing horizontally through the filler. The water flows down from the top of the filler and flows out from the bottom, so that the air flow and the water flow direction are perpendicular. This design helps to improve the cooling efficiency and is easy to maintain and operate.

[0044] It should be understood that "cooling tower group" usually refers to a collection of multiple cooling towers, which work as a whole to cool the cooling water to meet the cooling needs of a larger heat load. However, in some cases, "cooling tower group" is also usually used to refer to a cooling tower and its related components (there is only one cooling tower), in which case "group" refers to the cooling tower itself and its supporting fans, motors and other equipment. In this application, "cooling tower group" is the latter interpretation, used to refer to the cooling tower and its related built-in components.

[0045] The water pipe 2 includes a cooling water supply pipe 24, a cooling water return pipe 25, a plurality of cooling tower water inlet pipes 21 and a plurality of cooling tower water outlet pipes 22; each cooling tower group 1 is connected to a cooling tower water inlet pipe 21 and a cooling tower water outlet pipe 22; the cooling water supply pipe 24 is connected to each cooling tower water inlet pipe 21, and the cooling water return pipe 25 is connected to each cooling tower water outlet pipe 22; the cooling water flows from the cooling water supply pipe 24 into each cooling tower water inlet pipe 21 and then enters each cooling tower group 1, and after cooling down in the cooling tower group 1, it is discharged from the cooling tower water outlet pipe 22 of each cooling tower group 1 and converges to the cooling water return pipe 25;

[0046] The purpose of the cooling tower group 1 is to dissipate heat and cool high-temperature fluids. It reduces the temperature of the fluid by the principle of evaporative cooling, that is, spraying the hot fluid into the air so that the fluid and the air can fully exchange heat, thereby taking away the heat in the fluid and achieving the purpose of cooling.

[0047] There are three cycles in the cooling system. The first cycle is that the chilled water circulates between the cooling equipment (not shown) and the refrigeration unit (not shown). The chilled water takes away heat from the cooling equipment and is heated up to become high-temperature chilled water. Then it flows to the refrigeration unit. After the refrigerant in the refrigeration unit takes away the heat in the chilled water, the chilled water circulates again to the cooling equipment for cooling. The second cycle is the circulation of the refrigerant inside the refrigeration unit. The refrigeration unit is usually composed of an evaporator, a compressor, a condenser and an expansion valve. When the chilled water circulates to the refrigeration unit, heat exchange occurs in the evaporator of the refrigeration unit, and the refrigerant in the evaporator evaporates and takes away the heat of the chilled water. The compressor is to increase the pressure and temperature of the evaporated refrigerant, thereby providing sufficient power for the circulation of the refrigeration steam in the refrigeration unit. The expansion valve is used to control the conversion of the refrigerant from high-pressure liquid to low-pressure gas, and at the same time control the flow of the refrigerant. The condenser is the location where the refrigerant exchanges heat with the heated cooling water. In the condenser, the heat of the high-temperature refrigeration steam is taken away by the cooled cooling water, and the refrigeration steam is reliquefied into refrigerant, and a new cycle begins in the refrigeration unit. The third cycle is the circulation of cooling water between the refrigeration unit and the cooling tower group 1. Heat exchange occurs in the refrigeration unit. The temperature-increased cooling water is transmitted to the cooling tower group 1 under the action of the water pump 3, and heat exchange occurs with the air in the cooling tower group 1. It is cooled down again to become low-temperature cooling water and then circulated to the refrigeration unit again. The cooling tower group 1 here is the structure to be improved in this application.

[0048] The plurality of water pumps 3 are connected to the cooling water supply pipe 24; the PID controller 6 is electrically connected to the water pump 3 to control the working frequency of the water pump 3; the temperature measuring device 4 includes a first temperature measuring device 41 and a second temperature measuring device 42, the first temperature measuring device 41 is arranged in the air outside the cooling tower group 1 to measure the air wet bulb temperature, and the second temperature measuring device 42 is arranged in the cooling return water pipe 25 to measure the cooling return water temperature; the first valve 5 includes a plurality of cooling tower water inlet pipe first valves 51 and a plurality of cooling tower water outlet pipe first valves 52. A valve 52, each of the first valves 51 of the cooling tower water inlet pipe is arranged at each cooling tower water inlet pipe 21, and each of the first valves 52 of the cooling tower water outlet pipe is arranged at each cooling tower water outlet pipe 22; the PID controller 6 is electrically connected to the first temperature measuring device 41 and the second temperature measuring device 42 to receive temperature information, and is electrically connected to each of the first valves 51 of the cooling tower water inlet pipe and the first valve 52 of the cooling tower water outlet pipe to control the opening and closing and the opening size of the first valve 51 of the cooling tower water inlet pipe and the first valve 52 of the cooling tower water outlet pipe.

[0049] In an embodiment of the present invention, the water pipe 2 further includes a connecting main pipe 231 and a plurality of connecting branch pipes 232 . The connecting branch pipes 232 are respectively connected to each cooling tower group 1 and are connected and converged to the connecting main pipe 231 .

[0050] The function of the connecting main pipe 231 and the connecting branch pipe 232 is to balance the amount of cooling water in the water pans of each cooling tower group 1 at the same time. When the cooling tower outlet pipe 22 of an individual cooling tower group 1 is blocked, the cooling water therein cannot be discharged in time, resulting in an increase in the water level in the cooling tower group 1, and in severe cases, overflow may occur. By setting the connecting main pipe 231 and the connecting branch pipe 232, the cooling water in an individual cooling tower group 1 with poor drainage can be diverted to other cooling tower groups 1 with normal drainage, and the drainage pressure of the cooling tower group 1 with poor drainage can be shared by other cooling tower groups 1 with normal drainage, thereby avoiding overflow.

[0051] In an embodiment of the present invention, the electric valve 5 further includes a connecting branch pipe first valve 53 , and each connecting branch pipe first valve 53 is respectively disposed in each connecting branch pipe 232 .

[0052] like Figure 2 As shown, in this system, the PID controller 6 is electrically connected with the water pump 3, the first valve 51 of the cooling tower water inlet pipe, the first valve 52 of the cooling tower water outlet pipe, the first valve 53 of the connecting branch pipe, the first temperature measuring device 41, and the second temperature measuring device 42 to accurately control the opening and closing and opening size of the first valve 51 of the cooling tower water inlet pipe, the first valve 52 of the cooling tower water outlet pipe, and the first valve 53 of the connecting branch pipe, as well as the working quantity of the water pump 3 (if there are multiple water pumps). In this embodiment, there are 8 first valves 51 of the cooling tower water inlet pipe, namely, the first valve 511 of the cooling tower water inlet pipe, the first valve 512 of the cooling tower water inlet pipe, ..., the first valve 518 of the cooling tower water inlet pipe, which are respectively installed in the cooling tower water inlet pipe 21 of each cooling tower group 1 to control the amount of water flowing from the cooling water supply main pipe to each cooling tower group 1; there are 8 first valves 52 of the cooling tower water outlet pipe, namely, the first valve 521 of the cooling tower water outlet pipe, the first valve 522 of the cooling tower water outlet pipe, ... , the first valve 528 of the cooling tower outlet pipe is respectively installed in the cooling tower outlet pipe 22 of each cooling tower group 1, so as to control the amount of cooled cooling water flowing from each cooling tower group 1 to the cooling return water main 25; and there are also 8 connecting branch pipe first valves 53, namely the connecting branch pipe first valve 531, the connecting branch pipe first valve 532, ..., the connecting branch pipe first valve 538, which are respectively installed in the connecting branch pipe 232 corresponding to each cooling tower group 1, so as to balance the cooling water amount in the water pan inside each cooling tower group 1.

[0053] It should be understood that the water pump 3 here can be a single water pump 3. When a single water pump 3 cannot provide sufficient pumping capacity, multiple water pumps 3 can be connected in series to form a water pump group, such as Figure 1 The water pump 3 can be composed of a water pump 31, a water pump 32, ..., a water pump 3L, so as to provide sufficient potential energy to the cooling water so that it can reach the top of the cooling tower group 1 and fully exchange heat with the air.

[0054] It should be emphasized here that the PID controller in the embodiment of the present application is a hardware component, and the efficient cooling system based on the optimization of the cooling water circulation route in which it is located is also a hardware system. The efficient cooling system in the embodiment of the present application can be used alone or in combination with an existing software program. However, the efficient cooling system in the present application itself does not involve any software technology update. In addition, those skilled in the art should understand that the technology of using PID control to control the opening and closing and opening size of the first valve 5 is already existing.

[0055] The PID controller 6 is a feedback controller widely used in industrial control systems. It adjusts the control amount according to the error signal (i.e., the difference between the expected value and the actual measured value) to achieve the control target. PID is the acronym for the three operations of proportional, integral, and derivative, which represent the three basic control functions of the controller. The PID controller 6 can accurately adjust the opening of the first valve 5 and the number of working water pumps 3 (if there are multiple water pumps), ensure that each cooling tower group 1 operates according to predetermined parameters, and improve the control accuracy of the system; and, through the adjustment of the PID controller 6, excessive water supply or excessive operation of the water pump 3 can be avoided, thereby reducing energy waste and achieving energy saving and consumption reduction.

[0056] Preferably, in one embodiment of the present invention, the water pump 3 comprises a variable frequency water pump 3. The working frequency of a single water pump 3 can be directly controlled by the PID controller 6, thereby expanding the regulation of the overall working frequency of the water pump 3 by the PID controller 6 and controlling the pumping capacity of the water pump 3 more accurately.

[0057] In one embodiment of the present invention, the first temperature measuring device 41 includes a wet-bulb temperature sensor.

[0058] The wet bulb temperature sensor is a device used to measure the wet bulb temperature, which is a parameter indicating the relative humidity of the air. Its measurement principle is based on the characteristic that water absorbs heat when it evaporates, thereby reducing the temperature. The bulb temperature sensor usually consists of two thermometers, one is a dry bulb thermometer and the other is a wet bulb thermometer. The bulb of the wet bulb thermometer is wrapped with wet gauze, and the other end of the gauze is immersed in a water tank to keep it moist. When air flows through the wet bulb thermometer, the water on the wet gauze begins to evaporate. The evaporation process absorbs heat, causing the reading of the wet bulb thermometer to be lower than that of the dry bulb thermometer. In addition to temperature, the wet bulb temperature sensor can also indirectly measure the relative humidity of the air in its environment, which mainly uses the temperature difference between the wet bulb temperature and the dry bulb temperature. The drier the air, the faster the evaporation, the greater the temperature difference, and the lower the relative humidity. When the wet bulb temperature sensor is placed in the air outside the cooling tower group 1, the wet bulb temperature can reflect the temperature after the water spray treatment. The lower this temperature, the higher the efficiency of the cooling tower group 1.

[0059] The wet bulb temperature measured by the wet bulb thermometer refers to the lowest temperature that water can reach through the evaporative cooling process under specific environmental conditions, which represents the lowest temperature to which the cooling tower group 1 can theoretically cool the water. Because evaporative cooling is the main mechanism for reducing the water temperature in the cooling tower group 1, the actual cooling tower group 1 outlet water temperature is usually not lower than the wet bulb temperature measured by the wet bulb thermometer.

[0060] The wet-bulb temperature sensor is usually installed near the air inlet of the cooling tower group 1, so that the wet-bulb temperature of the air entering the cooling tower group 1 can be measured. In addition, the selected location should avoid direct sunlight, ensure good air circulation and be away from heat sources. Because direct sunlight will cause the wet-bulb thermometer reading to be high, affecting its measurement accuracy, it should be avoided from direct sunlight; in a location close to heat equipment, such as near a motor, a water pump 3, etc., it will also cause the wet-bulb thermometer reading to be high, affecting the measurement accuracy.

[0061] In one embodiment of the present invention, a plurality of second valves (not shown) are further included, and the second valves can be manual valves or electric valves or a combination of the two. In one embodiment of the present invention, the second valves include: a plurality of cooling tower water inlet pipe second valves (not shown) and a plurality of cooling tower water outlet pipe second valves (not shown); each cooling tower water inlet pipe second valve is respectively arranged at each cooling tower water inlet pipe, and each cooling tower water outlet pipe second valve is respectively arranged at each cooling tower water outlet pipe.

[0062] In one embodiment of the utility model, the second valve further includes: a plurality of connecting branch pipe second valves (not shown); each connecting branch pipe second valve is respectively arranged at each connecting branch pipe. Since the number of times the electric valve is switched is more frequent than that of the manual valve, and the failure rate is higher, once the first valve of the cooling tower water inlet pipe, the first valve of the cooling tower water outlet pipe or the first valve of the connecting branch pipe fails, the second valve can be used as a component to cut off the water supply of the pipeline, so as to facilitate the disassembly and maintenance of the first valve of the cooling tower water inlet pipe, the first valve of the cooling tower water outlet pipe or the first valve of the connecting branch pipe.

[0063] In this embodiment, the number of the second valve of the cooling tower water inlet pipe, the second valve of the cold zone tower water outlet pipe and the second valve of the connecting branch pipe are all 8, which are respectively placed at the cooling tower water inlet pipe 21, the cooling tower water outlet pipe 22 and the connecting branch pipe 232, and are adjacent to the first valve 51 of the cooling tower water inlet pipe, the first valve 52 of the cooling tower water outlet pipe and the first valve 53 of the connecting branch pipe set in each water pipe.

[0064] In one embodiment of the present invention, the type of the first valve 5 includes any one or more of the following: an electric ball valve, a butterfly valve, a gate valve, a stop valve, a balancing valve, a diaphragm valve, a pressure reducing valve, a two-way valve, and a three-way valve.

[0065] In one embodiment of the present invention, each cooling tower assembly 1 includes a motor and a fan.

[0066] As described above, the utility model has the following beneficial effects:

[0067] This solution changes the first valve in the original cooling system from a manual valve to an electric valve, thereby achieving automatic and precise adjustment of the number of cooling tower group 1 units in operation under partial load of the refrigeration station, avoiding disorderly and chaotic opening of cooling tower group 1; while ensuring the safe and reliable operation of the cooling system, by improving the operating efficiency of cooling tower group 1, the operating energy consumption of the refrigeration unit is reduced, and the energy efficiency of the refrigeration station system is improved.

[0068] In summary, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0069] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An efficient cooling system based on cooling water circulation route optimization, characterized in that: It includes a plurality of cooling tower groups, a plurality of water pumps, a plurality of water pipes, a plurality of temperature measuring devices, a plurality of first valves and a PID controller; wherein, The water pipes include a cooling water supply pipe, a cooling water return pipe, a plurality of cooling tower water inlet pipes and a plurality of cooling tower water outlet pipes; each cooling tower group is connected to a cooling tower water inlet pipe and a cooling tower water outlet pipe; the cooling water supply pipe is connected to each cooling tower water inlet pipe, and the cooling water return pipe is connected to each cooling tower water outlet pipe; cooling water flows from the cooling water supply pipe into each cooling tower water inlet pipe and then enters each cooling tower group, and after cooling down in the cooling tower group, it is discharged from the cooling tower water outlet pipe of each cooling tower group and converges to the cooling water return pipe; The plurality of water pumps are connected to the cooling water supply main; the PID controller is electrically connected to the water pump to control the working frequency of the water pump; The temperature measuring device comprises a first temperature measuring device and a second temperature measuring device, wherein the first temperature measuring device is arranged in the air outside the cooling tower group for measuring the air temperature, and the second temperature measuring device is arranged in the cooling return water main for measuring the cooling return water temperature; The first valve is an electric valve, and the first valve includes a plurality of first valves of cooling tower water inlet pipes and a plurality of first valves of cooling tower water outlet pipes; each first valve of the cooling tower water inlet pipe is arranged at each cooling tower water inlet pipe, and each first valve of the cooling tower water outlet pipe is arranged at each cooling tower water outlet pipe; the PID controller is electrically connected to the first temperature measuring device and the second temperature measuring device to receive temperature information, and is electrically connected to each first valve of the cooling tower water inlet pipe and the first valve of the cooling tower water outlet pipe to control the opening and closing and the opening size of the first valve of the cooling tower water inlet pipe and the first valve of the cooling tower water outlet pipe.

2. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 1, characterized in that: The water pipe also includes a connecting main pipe and a plurality of connecting branch pipes, wherein the connecting branch pipes are respectively connected to each cooling tower group and are connected and converged into the connecting main pipe.

3. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 2, characterized in that: The first valve also includes a connecting branch pipe first valve, which is arranged in each connecting branch pipe; the PID controller is electrically connected to each connecting branch pipe first valve to control the opening and closing and opening size of the connecting branch pipe first valve.

4. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 1, characterized in that: The first temperature measurement device includes a wet bulb temperature sensor.

5. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 1, characterized in that: The water pump comprises a variable frequency water pump.

6. A high-efficiency cooling system based on cooling water circulation route optimization as claimed in claim 1 or 2, characterized in that: Also included are a plurality of second valves, which may be manual valves or electric valves or a combination of the two.

7. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 6, characterized in that: The second valves include: a plurality of cooling tower water inlet pipe second valves and a plurality of cooling tower water outlet pipe second valves; each cooling tower water inlet pipe second valve is respectively arranged at each cooling tower water inlet pipe, and each cooling tower water outlet pipe second valve is respectively arranged at each cooling tower water outlet pipe.

8. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 6, characterized in that: The second valve further comprises: a plurality of connecting branch pipe second valves; each connecting branch pipe second valve is respectively arranged at each connecting branch pipe.

9. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 1, characterized in that: The type of the first valve includes any one or more of the following: an electric ball valve, a butterfly valve, a gate valve, a stop valve, a balancing valve, a diaphragm valve, a pressure reducing valve, a two-way valve, and a three-way valve.

10. The high-efficiency cooling system based on cooling water circulation route optimization according to claim 1, characterized in that: Each cooling tower group includes a motor and a fan.

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