An engine test facility cooling circulating water management system

Abstract

The utility model belongs to the field of automobile test testing, specifically related to a kind of engine laboratory cooling water intelligent circulation system. The system includes circulating water cooling tank and circulating water hot tank, high-position electric control bypass valve and low-position electric control bypass valve intercommunication are provided between the circulating water cooling tank and circulating water hot tank;Circulating water hot tank bottom pipeline is connected heat road water pump group and cooling tower fan in proper order, after cooling tower fan, it is passed into circulating cooling water tank top;Circulating water cooling tank bottom pipeline is connected cold road water pump group and laboratory water equipment in proper order after being passed into circulating water hot tank top. The utility model can monitor the operating state of circulating water road system in real time;Maximize energy saving, control equipment operates in optimal energy consumption interval;Can make part of equipment suspend or low load state work, reduce equipment wear, prolong service life.

Description

Technical Field

[0001] This utility model belongs to the field of automotive testing and specifically relates to an intelligent cooling water circulation system for engine testing laboratories. Background Technology

[0002] In the development and testing of automotive powertrains, many test equipment require circulating water cooling. The varying number of test benches, test loads, equipment types, and ambient temperatures pose significant challenges to the overall circulating water supply requirements of the laboratory. Traditional laboratory circulating water supply methods rely on independent water tanks, cooling towers, and cooling water pumps operating at maximum power, employing an oversaturated supply approach. While this method can meet the needs of most test equipment, it results in high energy consumption, high equipment load rates, and shortened lifespans for cooling towers and pumps. Therefore, it is essential to design an energy-efficient and controlled laboratory cooling circulating water management system from the outset of laboratory construction. Utility Model Content

[0003] From the outset of laboratory construction, the variable testing requirements were fully considered. A related automatic control valve and centralized control system were designed to precisely control the laboratory's cooling water circulation system. This achieves accurate control of the target water temperature while maximizing energy savings and minimizing equipment wear. The specific technical solution is as follows:

[0004] An intelligent cooling water circulation system for an engine testing laboratory: The system includes a circulating water cooling tank and a circulating water hot water tank, with a high-level electrically controlled bypass valve and a low-level electrically controlled bypass valve connecting the circulating water cooling tank and the circulating water hot water tank; the bottom pipe of the circulating water hot water tank is sequentially connected to a hot water pump group and a cooling tower fan, and then flows into the top of the circulating water cooling tank after passing through the cooling tower fan; the bottom pipe of the circulating water cooling tank is sequentially connected to a cold water pump group and laboratory water-using equipment, and then flows into the top of the circulating water hot water tank.

[0005] Furthermore, a cold water level gauge and a hot water level gauge are respectively installed in the circulating water cold water tank and the circulating water hot water tank.

[0006] Furthermore, a temperature sensor is installed at the outlet pipe of the circulating water cooling tank.

[0007] Furthermore, a control host is provided, which is connected to the laboratory water equipment, cold water level gauge, high-level electrically controlled bypass valve, hot water level gauge, cooling tower fan, hot water pump set, low-level electrically controlled bypass valve, cold water pump set, and temperature sensor. The control host can control the opening and closing of the above valves and pump sets, and transmit temperature and level data.

[0008] This invention enables the following: 1) The control logic of the circulating water system is determined based on the temperature changes of the circulating water. For example, in winter, the cooling tower can be turned off, and only the equipment's water supply circuit needs to circulate on its own. In summer, when temperatures are high, all equipment is turned on. To prevent heat exchange between hot and cold water, which would affect the cooling effect, the cold and hot water tanks operate independently. 2) Depending on the experimental requirements, the number and frequency of water pumps in the pump group can be adjusted to save energy. 3) Based on the sensor signals collected by the centralized signal processing control host, fault alarms are issued in a timely manner and fed back to the test bench water equipment, the circulating system cooling tower, and the circulating water pump group, prompting shutdown actions.

[0009] Its beneficial effects are: 1) It can monitor the operating status of the circulating water system in real time, alarm in time when abnormality occurs, and control the shutdown of relevant test equipment that affects the test results; 2) It can maximize energy saving, and control the equipment to operate in the optimal energy consumption range according to the needs of different test scenarios and different ambient temperatures; 3) It can make some equipment stop or work in a low-load state, reduce equipment wear and extend service life. Attached Figure Description

[0010] Figure 1 A schematic diagram of the structure of this utility model;

[0011] Figure 2 This utility model's operating mode diagram.

[0012] Figure reference numerals: 1-Laboratory water equipment, 2-Circulating water cooling tank, 3-Cold water level gauge, 4-High-level electrically controlled bypass valve, 5-Hot water level gauge, 6-Circulating water hot water tank, 7-Cooling tower fan, 8-Hot water pump set, 9-Low-level electrically controlled bypass valve, 10-Cold water pump set, 11-Control host, 12-Temperature sensor. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1As shown, an intelligent cooling water circulation system for an engine test laboratory includes a circulating water cooling tank 2 and a circulating water hot water tank 6. A high-level electrically controlled bypass valve 4 and a low-level electrically controlled bypass valve 9 are connected between the circulating water cooling tank 2 and the circulating water hot water tank 6. The bottom pipe of the circulating water hot water tank 6 is sequentially connected to a hot water pump group 8 and a cooling tower fan 7, and then flows into the top of the circulating water cooling tank 2 after passing through the cooling tower fan 7. The bottom pipe of the circulating water cooling tank 2 is sequentially connected to a cold water pump group 10 and a test laboratory water equipment 1, and then flows into the top of the circulating water hot water tank 6.

[0015] A cold water level gauge 3 and a hot water level gauge 5 are respectively installed in the circulating water cold water tank 2 and the circulating water hot water tank 6.

[0016] A temperature sensor 12 is installed at the outlet pipe of the circulating water cooling tank 2.

[0017] A control host 11 is provided, which is connected to the laboratory water equipment 1, cold water level gauge 3, high-level electrically controlled bypass valve 4, hot water level gauge 5, cooling tower fan 7, hot water pump set 8, low-level electrically controlled bypass valve 9, cold water pump set 10, and temperature sensor 12. The control host can control the opening and closing of the above valves and pump sets, and transmit temperature and level data.

[0018] like Figure 2 As shown, the cooling water circulation mode is divided into 4 modes according to the water temperature and water consumption requirements. The first mode is manually switched, while the latter three modes are automatically switched by the control host.

[0019] 1) Ultra-low load insulation mode

[0020] When the ambient temperature is very low and the water consumption of the test equipment is very small, some equipment requires that the cooling water temperature cannot be too low (and needs to operate in this state for a long time). Since the cooling circulation system has no heating device, it is necessary to reduce the total circulating water volume and use the heat exchange of other equipment to keep the system temperature from getting too low.

[0021] Control method: The control host 11 sends a signal command, the low-position electric bypass valve 9 opens, and the cold water tank 2 of the hot and cold circulating water system starts to release water. When the water level reaches point a as measured by the cold water level gauge 3, the water release stops. At this time, the water levels in both the cold and hot water tanks are very low. The cold water pump group 10 starts to operate at low frequency, while the hot water pump group 8 and the cooling tower fan 7 stop working. Because the water volume is relatively small, the heat generated by the testing equipment can quickly raise the temperature of the circulating water, so the temperature will not be too low. As the temperature rises, the temperature difference between the cooling water and the pipe wall, tank, and outside air gradually increases, and the heat exchange and heat dissipation also increase. The water temperature will basically be maintained in a balanced state.

[0022] 2) Low-temperature energy-saving mode

[0023] When the external ambient temperature is very low and the water consumption of the test equipment is large, the insufficient water level in the water tank cannot meet the test temperature control requirements.

[0024] Control method: The control host 11 sends a signal command, the low-position electrically controlled bypass valve 9 opens, and the high-position electrically controlled bypass valve 4 also opens. The cold and hot circulating water tanks 2 are replenished with water at the same time. When the water level reaches the height of point b as measured by the cold water level gauge 3, the water replenishment stops. At this time, the water levels in the cold and hot water tanks are both high. The cold circuit water pump group 10 starts and multiple water pumps work simultaneously. The hot circuit water pump group 8 and the cooling tower fan 7 stop working. As the temperature rises, the temperature difference between the cooling water and the pipe wall, tank and outside air gradually increases, and the heat exchange heat dissipation also increases. The water temperature will basically be maintained in a balanced state. When the temperature sensor 12 detects that the water temperature has increased to the water temperature limit alarm value of the test equipment, it will enter the next control mode.

[0025] 3) Medium-temperature energy-saving control mode

[0026] As the external ambient temperature gradually increases and the water consumption of the test equipment is large, the water temperature rises rapidly, and the heat exchange between the system and the environment alone can no longer meet the temperature control requirements.

[0027] Control method: The control host 11 sends a signal command to close the low-position electrically controlled bypass valve 9 and the high-position electrically controlled bypass valve 4. The hot water pump group 8 then controls the cooling water in the circulating hot water tank 6 to be cooled by the cooling tower fan 7 and then introduced into the circulating cold water tank 2. This continues until the cold water level gauge 3 detects that the liquid level has reached the high point c, at which point the hot water pump group and the cooling tower fan stop. When the control host 11 detects that the liquid level is lower than point a through the cold water level gauge 3, it sends another command to control the hot water pump group 8 to cool the cooling water in the circulating hot water tank 6 through the cooling tower fan 7 and then introduce it into the circulating cold water tank 2. This continues until the cold water level gauge 3 detects that the liquid level has returned to point c, at which point the hot water pump group and the cooling tower fan stop. This cycle repeats. Because the water tank volume is large, one cycle takes a relatively long time, so the cooling water pumps do not start and stop frequently, and unnecessary losses are minimal. Meanwhile, the hot and cold water tanks are not connected, so the water temperature in the hot water tank remains relatively high, resulting in a large temperature difference with the outside environment. Cooling through the cooling tower improves cooling efficiency. When temperature sensor 12 detects that the water temperature has increased to the limit value of the testing equipment, it will enter the next control mode.

[0028] 4) High-temperature full-load cooling mode

[0029] When the ambient temperature gradually increases, the water consumption of the test equipment reaches its maximum, and the water temperature rises rapidly, a single cycle of cooling is no longer sufficient to meet the temperature control requirements.

[0030] Control Method: The control host 11 sends a signal command, closing the low-level electrically controlled bypass valve 9 and opening the high-level electrically controlled bypass valve 4. This controls the hot water pump group 8 and the cooling tower fan 7 to operate at full load, cooling water from the circulating hot water tank 6 is cooled and then introduced into the circulating cold water tank 2. Because the bypass valve 4 is open, some cold water flows back to the hot water tank 6 through the high-level bypass valve 4. The liquid level in the circulating cold water tank 2 will be continuously controlled below the high-level bypass valve (the hot water pump group 8 has a higher power than the cold water pump group 10, and its circulating pipeline resistance is lower, so in this mode, the cold water tank level is always higher than the hot water tank level). This mode achieves separation of the cold and hot water tanks and ensures the balance of water levels in the cold and hot water tanks under full-load operation of the cooling tower circulating water system. When the temperature sensor 12 detects that the water temperature still exceeds the test equipment's temperature limit, an alarm is triggered, the test equipment is shut down, and maintenance personnel are alerted to investigate the cause.

[0031] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A cooling circulating water management system for engine testing equipment, characterized in that: The system includes a circulating water cooling tank and a circulating water hot water tank, which are connected by a high-level electrically controlled bypass valve and a low-level electrically controlled bypass valve. The bottom pipe of the circulating water hot water tank is sequentially connected to the hot water pump group and the cooling tower fan, and then flows into the top of the circulating water cooling tank after passing through the cooling tower fan. The bottom pipe of the circulating water cooling tank is sequentially connected to the cold water pump group and the laboratory water equipment, and then flows into the top of the circulating water hot water tank.

2. The cooling circulating water management system for engine testing equipment according to claim 1, characterized in that: A cold water level gauge and a hot water level gauge are respectively installed in the circulating water cold water tank and the circulating water hot water tank.

3. The cooling circulating water management system for engine testing equipment according to claim 1, characterized in that: A temperature sensor is installed at the outlet pipe of the circulating water cooling tank.

4. The cooling circulating water management system for engine testing equipment according to claim 1, characterized in that: A control host is provided, which is connected to the laboratory water equipment, cold water level gauge, high-level electric bypass valve, hot water level gauge, cooling tower fan, hot water pump set, low-level electric bypass valve, cold water pump set and temperature sensor.

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