Multi-station large-flow engine water supply system and water supply method

Abstract

The application provides a multi-station large-flow engine water supply system and a water supply method, and relates to the technical field of engine testing. The multi-station large-flow engine water supply system can supply cooling water to multiple engine stations. The water supply system is provided with a water cooling unit and a heat exchanger to cool the cooling water in a second cooling water flow path, and the cooling water in the second cooling water flow path and the cooling water in a first cooling water flow path are mixed according to a required proportion and then supplied to the engine for cooling. The temperature of the cooling water supplied to the engine is more accurate, which helps to ensure that the use of the water cooling unit can meet the water supply requirements of the multi-station large-flow engine, and the problem that it is difficult to meet the cooling requirements of the multi-station large-flow engine under high-temperature and high-humidity weather in summer by using an evaporative air-cooled cooling tower to cool the circulating water is avoided.

Description

Technical Field

[0001] This invention relates to the field of engine testing technology, and more specifically, to a water supply system and method for multiple high-flow engines. Background Technology

[0002] To ensure a wide range of engine power options and compatible models for ships during the design phase, companies developing and manufacturing marine diesel engines need to build multiple test benches to meet the research, production, and testing requirements of high-power marine engines. During operation, high-power marine engines require a large external flow of cooling water to ensure normal heat exchange in engine components (such as air coolers and freshwater heat exchangers) and power absorption by hydraulic dynamometers, while maintaining suitable water pressure and supply temperature. Especially when multiple test benches are operating simultaneously, the total supply volume of the entire circulating cooling water system is calculated in thousands of cubic meters per hour.

[0003] The factory typically employs a unified external circulating cooling water design, where a centralized circulating cooling water system supplies cooling water to each test bench via pumps. After participating in heat exchange and temperature increases at each bench, the water is collected and returned to a collection tank. The cooling system then lowers the water temperature before pumping it back to the test benches, thus achieving water recycling. This is currently a relatively mature and economical water supply method. While cooling systems generally employ two technical approaches for circulating water temperature reduction: evaporative cooling towers and chillers, chillers are often used for small engines (less than 1000kW) due to their higher energy consumption and the heat they generate. For high-power engines, especially those requiring multiple engine benches, evaporative air-cooled cooling towers are commonly used. This technology is mature but suffers from significant susceptibility to atmospheric temperature and humidity. Particularly in hot and humid summer weather, the cooling tower's evaporation capacity decreases, limiting the cooling water's temperature drop and causing the circulating cooling water temperature to gradually rise, failing to meet the engine testing requirements. Therefore, how to supply cooling water to multiple engines under high temperature and humidity conditions in summer has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a water supply system and method for multiple high-flow engines, which can improve the problem in the prior art of effectively supplying cooling water to multiple engines under high temperature and humidity conditions in summer.

[0005] The embodiments of the present invention can be implemented in the following ways:

[0006] A multi-station high-flow-rate engine water supply system, wherein the multi-station high-flow-rate engine is used to supply cooling water to multiple engine stations; the multi-station high-flow-rate engine water supply system includes:

[0007] A cooling water flow path includes a cooling water inlet, a first cooling water flow path, a second cooling water flow path, and multiple flow distribution valves. Both the first and second cooling water flow paths are connected to the cooling water inlet. The first cooling water flow path has multiple first water supply pipes distributed along the flow direction, each connected to one of the multiple flow distribution valves. The second cooling water flow path has a heat exchanger, and a portion of the second cooling water flow path downstream of the heat exchanger has multiple second water supply pipes distributed along the flow direction, each connected to one of the multiple flow distribution valves. The flow distribution valves are connected to the engine and are used to mix the cooling water from the first and second water supply pipes according to a preset ratio, and supply the mixed cooling water to the engine.

[0008] The water-cooled flow path includes a chiller unit connected to the heat exchanger to supply chilled water to the heat exchanger and to cool the cooling water in the second cooling water flow path through the heat exchanger.

[0009] Optionally, the water-cooled flow path further includes a first pipeline, a low-temperature water flow distribution valve, and a second pipeline; the low-temperature water flow distribution valve is installed at the cold water outlet of the chiller unit; one end of the first pipeline is connected to the low-temperature water flow distribution valve, and the other end is connected to the heat exchanger to supply cold water from the chiller unit to the heat exchanger; one end of the second pipeline is connected to the low-temperature water flow distribution valve, and the other end is connected to the second cooling water flow path, with the connection point located downstream of the heat exchanger and upstream of the second water supply pipe closest to the heat exchanger;

[0010] The low-temperature water flow distribution valve is used to control the flow rate of the first pipeline and the second pipeline.

[0011] Optionally, the water-cooled flow path further includes a first water source pipeline, a cooling supply pipeline, a low-temperature cold water tank, and a first return water pipeline. The first water source pipeline is connected to the low-temperature cold water tank to supply water to the low-temperature cold water tank. The two ends of the cooling supply pipeline are respectively connected to the low-temperature cold water tank and the chiller unit to supply water to the chiller unit. The two ends of the first return water pipeline are respectively connected to the heat exchanger and the first water source pipeline to realize cold water circulation.

[0012] Optionally, the water cooling flow path further includes an automatic ice-dropping machine, which is disposed on the upper side of the low-temperature cold water tank and is used to drop ice into the low-temperature cold water tank to reduce the temperature of the cold water in the low-temperature cold water tank.

[0013] Optionally, a chilled water temperature sensor is installed on the cooling pipeline, and the chilled water temperature sensor is used to detect the temperature of the chilled water supplied to the chiller unit.

[0014] Optionally, the volume V of the low-temperature cold water tank is determined by the following formula:

[0015] V = V 机 +V 补 +V 水质管理

[0016] V machine = q 泵 *t / (ρ 水 ·c 水1 ·ΔT1)

[0017] V 水质管理 =5% (V) 机 +V 补 )

[0018] Among them, V 补 The volume required for ice throwing; q 泵 ρ is the cold end water circulation flow rate of the chiller unit; t is the minimum operating time of the chiller unit; 水 c is the density of cold water. 水1 ΔT1 represents the specific heat capacity of cold water; ΔT1 represents the preset temperature fluctuation range.

[0019] Optionally, the multi-position high-flow engine water supply system further includes a third water supply pipe, the two ends of which are connected to the first cooling water channel and the chiller unit respectively, so as to introduce the cooling water in the first cooling water flow path into the chiller unit through the third water supply pipe and cool the chiller unit.

[0020] The multi-unit high-flow engine water supply system also includes a second return water pipeline and a third return water pipeline. The second return water pipeline is used to send the cooling water after cooling the multiple engines back to the collection tank. The two ends of the third return water pipeline are respectively connected to the chiller unit and the second return water pipeline to introduce the cooling water after cooling the chiller unit into the second return water pipeline.

[0021] Optionally, the heat exchange capacity Q of the heat exchanger is determined by the following formula:

[0022] Q>Q 换

[0023] Q 换 =c 水2m 水 ΔT2

[0024] ΔT2=T 冷 -T 柴

[0025] Among them, c 水2 The specific heat capacity of cooling water; m 水 T represents the mass of coolant per unit time calculated based on the maximum coolant flow rate required by the engine with the highest power among multiple engines; 冷 Natural water supply temperature; T 柴 This is the required coolant temperature for the most powerful engine among multiple engines.

[0026] A method for supplying water to multiple high-flow-rate engines, wherein the method is implemented based on the aforementioned water supply system for multiple high-flow-rate engines; the method includes:

[0027] Obtain the target station location; wherein, the target station location is the station location where the engine requiring cooling is located;

[0028] Control the flow distribution valve corresponding to the target station position;

[0029] Obtain the outlet water parameters of the flow distribution valve corresponding to the target station, and control the valve position of the flow distribution valve according to the outlet water parameters; wherein, the outlet water parameters include the outlet water temperature.

[0030] Optionally, the water-cooled flow path includes a first pipeline, a low-temperature water flow distribution valve, and a second pipeline; the low-temperature water flow distribution valve is installed at the outlet of the chiller unit; one end of the first pipeline is connected to the low-temperature water flow distribution valve, and the other end is connected to the heat exchanger to supply chilled water from the chiller unit to the heat exchanger; one end of the second pipeline is connected to the low-temperature water flow distribution valve, and the other end is connected to the second cooling water flow path, with the connection point located downstream of the heat exchanger and upstream of the second water supply pipe closest to the heat exchanger; the water supply method for multiple high-flow engines further includes:

[0031] The valve position of the low-temperature water flow distribution valve is controlled according to the outlet water parameters so as to directly mix part of the chilled water from the chiller unit into the second cooling water flow path.

[0032] Optionally, the water-cooled flow path further includes a low-temperature chilled water tank and an automatic ice-removing machine, wherein the low-temperature chilled water tank is used to supply chilled water to the chiller unit, and the automatic ice-removing machine is installed on the upper side of the low-temperature chilled water tank; the water supply method for multiple high-flow-rate engines further includes:

[0033] The automatic ice-dropping machine is controlled to drop ice into the low-temperature cold water tank according to the water output parameters in order to lower the cold water temperature.

[0034] The beneficial effects of the multi-unit high-flow-rate engine water supply system and water supply method provided by the embodiments of the present invention include:

[0035] An embodiment of the present invention provides a multi-station, high-flow-rate engine water supply system for supplying cooling water to multiple engine stations. This system includes a cooling water flow path and a water-cooled flow path. The cooling water flow path has a cooling water inlet, a first cooling water flow path, a second cooling water flow path, and multiple flow distribution valves. Both the first and second cooling water flow paths are connected to the cooling water inlet, so that a portion of the cooling water flowing from the inlet enters the first cooling water flow path, and the remaining portion enters the second cooling water flow path. Multiple first water supply pipes are distributed along the flow direction on the first cooling water flow path. A heat exchanger is installed on the second cooling water flow path, and multiple second water supply pipes are distributed along the flow direction downstream of the heat exchanger. The multiple first and second water supply pipes are respectively connected to multiple corresponding flow distribution valves. Thus, through each flow distribution valve, the cooling water in the first and second water supply pipes can be mixed with the cooling water in the second water supply pipes according to the required ratio, and the mixed cooling water is supplied to the engine. The water-cooled flow path includes a water-cooled unit connected to a heat exchanger, supplying chilled water to the heat exchanger so that the heat exchanger can use this chilled water to cool the cooling water in the second cooling water flow path. This multi-unit, high-flow-rate engine water supply system cools the cooling water in the second cooling water flow path by using a water-cooled unit and a heat exchanger. The cooling water in the second cooling water flow path is mixed with the cooling water in the first cooling water flow path according to the required ratio before being supplied to the engines. This results in a more precise cooling water temperature supplied to the engines, helping to ensure that the water-cooled unit meets the water supply needs of multiple high-flow-rate engines. This avoids the problem of using evaporative air-cooled cooling towers for circulating water cooling, which often fails to meet the cooling requirements of multiple high-flow-rate engines in hot and humid summer weather.

[0036] Embodiments of the present invention also provide a water supply method for multiple high-flow-rate engines. This water supply method for multiple high-flow-rate engines is implemented based on the above-mentioned water supply system for multiple high-flow-rate engines. Therefore, it also has the technical effect of avoiding the problem that the method of using an evaporative air-cooled cooling tower for circulating water cooling is difficult to meet the cooling needs of multiple high-flow-rate engines in hot and humid summer weather. Attached Figure Description

[0037] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0038] Figure 1 A schematic diagram of a multi-unit high-flow-rate engine water supply system according to one aspect of the present invention is shown.

[0039] Figure 2 A schematic diagram of the structure of the flow distribution valve of the multi-position high-flow engine water supply system according to one aspect of the present invention is shown at the engine water supply point;

[0040] Figure 3 A schematic diagram of the water cooling flow path in a multi-unit high-flow-rate engine water supply system provided according to one aspect of the present invention is shown.

[0041] Figure label:

[0042] 10 - Multi-unit high-flow engine water supply system; 100 - Cooling water flow path; 111 - Cooling water inlet; 112 - First cooling water flow path; 113 - First water supply pipe; 114 - Second cooling water flow path; 115 - Second water supply pipe; 120 - Flow distribution valve; 121 - First inlet; 122 - Second inlet; 123 - Cooling water outlet; 131 - Inlet pipe; 132 - Flow meter; 133 - Outlet water temperature sensor; 134 - Outlet water pressure sensor; 141 - Second return water pipe;

[0043] 210 - Heat exchanger; 211 - Cold end inlet; 212 - Cold end outlet; 213 - Hot end inlet; 214 - Hot end outlet; 220 - First return water pipe;

[0044] 300-Water-cooled flow path; 310-Chiller unit; 311-Cold water inlet; 312-Cold water outlet; 313-Cooling inlet; 314-Cooling outlet; 321-Low-temperature water flow distribution valve; 322-First pipeline; 323-Second pipeline; 324-Third water supply pipeline; 325-Third return water pipeline; 326-Flow regulating valve; 331-First water source pipeline; 332-Second water source pipeline; 333-Low-temperature chilled water tank; 334-Cooling supply pipeline; 335-First water supply valve; 336-Water supply pump; 337-Cold water temperature sensor; 338-Cold water circulation pump; 339-Automatic ice removal machine; 340-Second water supply valve;

[0045] 400 - Electronic Control System;

[0046] 20-Engine. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0048] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Figure 1 A schematic diagram of the structure of the multi-unit high-flow-rate engine water supply system 10 provided in this embodiment is shown. Please refer to... Figure 1 In this embodiment, the multi-unit high-flow-rate engine water supply system 10 can supply cooling water to multiple engines (20 units). For example... Figure 1 As shown, the multi-position high-flow engine water supply system 10 in this embodiment has 5 engine 20 positions, that is, the multi-position high-flow engine water supply system 10 can supply cooling water to the 5 engines 20. It can be understood that in some other embodiments, the number of engine 20 positions can be specifically set according to the needs, such as 4 or 6.

[0052] The multi-unit high-flow-rate engine water supply system 10 provided in this embodiment will be further described below:

[0053] Please continue to refer to Figure 1 In this embodiment, the multi-unit high-flow engine water supply system 10 includes a cooling water flow path 100 and a water-cooling flow path 300.

[0054] The cooling water flow path 100 includes a cooling water inlet 111, a first cooling water flow path 112, a second cooling water flow path 114, and multiple flow distribution valves 120. Each flow distribution valve 120 corresponds to one of the multiple engines 20, thus supplying cooling water to each of the multiple engines 20 respectively. Both the first cooling water flow path 112 and the second cooling water flow path 114 are connected to the cooling water inlet 111, so that a portion of the cooling water flowing from the cooling water inlet 111 enters the first cooling water flow path 112, and the remaining portion enters the second cooling water flow path 114. The first cooling water flow path 112 is provided with multiple first water supply pipes 113 distributed along the flow direction, and each of the multiple first water supply pipes 113 is connected to one of the multiple flow distribution valves 120, thus supplying cooling water in the first cooling water flow path 112 to the corresponding engine 20 through the first water supply pipes 113 and the flow distribution valves 120.

[0055] The second cooling water flow path 114 is equipped with a heat exchanger 210, which cools and exchanges heat with the cooling water in the second cooling water flow path 114. That is, the temperature of the cooling water downstream of the heat exchanger 210 in the second cooling water flow path 114 is lower than the temperature of the cooling water in the first cooling water flow path 112. The second cooling water flow path 114 downstream of the heat exchanger 210 has multiple second water supply pipes 115 distributed along the flow direction. Each of the multiple second water supply pipes 115 is connected to a corresponding flow distribution valve 120. Thus, the cooling water in the second cooling water flow path 114, after being cooled by the heat exchanger 210, enters the flow distribution valve 120 through the second water supply pipes 115. According to the flow distribution valve 120, the cooling water in the second water supply pipes 115 is mixed with the cooling water in the first water supply pipe 113 in a preset ratio and then supplied to the corresponding engine 20. This allows for more precise control of the cooling water temperature entering the engine 20. It not only meets the constant cooling water supply requirements of the target station but also reduces the flow rate of water participating in recooling, avoiding energy waste caused by large flow rates of cooling water. As a result, the chiller unit 310 can meet the cooling water supply requirements of multiple high-flow engines. During the test, the corresponding function of the multiple station components can be flexibly selected according to the test requirements, which helps to achieve online switching.

[0056] Specifically, in this embodiment, the multi-position high-flow-rate engine water supply system 10 supplies cooling water to five engines 20. Correspondingly, the multi-position high-flow-rate engine water supply system 10 has five flow distribution valves 120, and five first water supply pipes 113 and five second water supply pipes 115. Each flow distribution valve 120 has a first inlet 121, a second inlet 122, and a cooling water outlet 123. The five first water supply pipes 113 are connected to the first inlets 121 of the five flow distribution valves 120, and the five second water supply pipes 115 are connected to the second inlets 122 of the five flow distribution valves 120. The flow distribution valves 120 control the flow ratio of the connected first water supply pipes 113 and second water supply pipes 115 and supply the mixed cooling water to the corresponding engines 20 through the cooling water outlets 123.

[0057] Understandably, when the multi-station high-flow engine water supply system 10 is used to supply cooling water to other engine stations, the number of flow distribution valves 120, first water supply pipes 113 and second water supply pipes 115 can be specifically set according to the number of engine stations.

[0058] Figure 2 This diagram illustrates the structure of the multi-position high-flow engine water supply system 10, where the flow distribution valve 120 supplies water to the engine 20, as provided in this embodiment. Please refer to the diagram. Figure 1 and Figure 2 In this embodiment, the cooling water outlet 123 of the flow distribution valve 120 is also provided with an inlet pipe 131, which connects to the cooling flow channel inside the engine 20, thereby supplying the cooling water mixed by the flow distribution valve 120 to the engine 20 to meet the cooling requirements of the engine 20. Optionally, the inlet pipe 131 is also provided with a flow meter 132, an outlet water temperature sensor 133, and an outlet water pressure sensor 134. The flow meter 132 measures the flow rate of the cooling water mixed by the flow distribution valve 120 to obtain the outlet water flow rate; the outlet water temperature sensor 133 measures the temperature of the mixed cooling water to obtain the outlet water temperature; and the outlet water pressure sensor 134 measures the pressure of the mixed cooling water to obtain the outlet water pressure. The opening of the flow distribution valve 120 is adjusted according to at least one of the outlet water flow rate, outlet water temperature, and outlet water pressure to adjust the specific ratio value of the preset ratio to meet the cooling requirements of the engine 20.

[0059] Figure 3 This is a schematic diagram of the water-cooled flow path 300 in the multi-unit high-flow-rate engine water supply system 10 provided in this embodiment. Please refer to the following: Figure 1 and Figure 3In this embodiment, the water cooling flow path 300 includes a chiller unit 310, which is connected to the heat exchanger 210. The chiller unit 310 provides chilled water to the heat exchanger 210 through the water cooling flow path 300, thereby forming a cold end in the heat exchanger 210. The end of the second cooling water flow path 114 connected to the heat exchanger 210 forms a hot end. The cooling water exchanges heat with the hot end, thereby reducing the temperature of the cooling water in the second cooling water flow path 114.

[0060] Specifically, heat exchanger 210 has a cold end inlet 211, a cold end outlet 212, a hot end inlet 213, and a hot end outlet 214. Cooling water from the second cold water flow channel flows into heat exchanger 210 from hot end inlet 213, undergoes heat exchange and cooling in heat exchanger 210, and then flows out from hot end outlet 214. Chiller unit 310 has a cold water inlet 311 and a cold water outlet 312. The cold water outlet 312 is connected to the cold end inlet 211 of heat exchanger 210, thereby supplying cold water to the cold end of heat exchanger 210 as a medium for cooling the cooling water in the second cold water flow channel. The water chiller unit can cool the ambient temperature tap water from cold water inlet 311 to 5-12°C. Optionally, heat exchanger 210 can be a plate heat exchanger.

[0061] Furthermore, the water-cooled flow path 300 also includes a first pipe 322, a low-temperature water flow distribution valve 321, and a second pipe 323. The low-temperature water flow distribution valve 321 is installed at the cold water outlet 312 of the chiller unit 310. One end of the first pipe 322 is connected to the low-temperature water flow distribution valve 321, and the other end is connected to the heat exchanger 210, thereby supplying cold water from the chiller unit 310 to the heat exchanger 210 through the first pipe 322. One end of the second pipe 323 is connected to the low-temperature water flow distribution valve 321, and the other end is connected to the second cooling water flow path 114, with the connection point located downstream of the heat exchanger 210 and upstream of the second water supply pipe 115 closest to the heat exchanger 210. The low-temperature water flow distribution valve 321 can distribute the chilled water from the chiller unit 310. According to the demand, at least part of the chilled water can be controlled to enter the heat exchanger 210 through the first pipe 322 to cool the cooling water in the second cooling water flow path 114. The remaining chilled water can directly enter the second cooling water flow path 114 through the second pipe 323. This part of the chilled water is supplied to the engine 20 as cooling water through the second pipe 323, thereby further reducing the temperature of the cooling water in the second pipe 323, which helps to meet the cooling requirements of the engine 20.

[0062] In this embodiment, the water-cooled flow path 300 further includes a first water source pipe 331, a cooling supply pipe 334, a low-temperature cold water tank 333, and a first return water pipe 220. The first water source pipe 331 is connected to the low-temperature cold water tank 333, thereby supplying water to the low-temperature cold water tank 333 to ensure the water level in the low-temperature cold water tank 333. The two ends of the cooling supply pipe 334 are respectively connected to the low-temperature cold water tank 333 and the chiller unit 310 to supply water to the chiller unit 310. The two ends of the first return water pipe 220 are respectively connected to the heat exchanger 210 and the first water source pipe 331 to realize cold water circulation.

[0063] Specifically, the cooling supply pipe 334 is connected to the chilled water inlet 311 of the chiller unit 310, supplying chilled water from the low-temperature chilled water tank 333 to the chiller unit 310 as needed. The chiller unit 310 cools the chilled water and supplies it to the heat exchanger 210 through the chilled water outlet 312 and the first pipe 322. One end of the first return water pipe 220 is connected to the cold end outlet 212 of the heat exchanger 210, and the other end is connected to the first water source pipe 331, thereby guiding the chilled water that has passed through the heat exchanger 210 back to the low-temperature chilled water tank 333.

[0064] Optionally, the first water source pipeline 331 is also equipped with a first water supply valve 335 and a water supply pump 336. The first water supply valve 335 is used to open and close the first water source pipeline 331. When the first water supply valve 335 is open, water from the external water source enters the low-temperature cold water tank 333 through the first water source pipeline 331 under the pumping action of the water supply pump 336. The connection point between the first return water pipeline 220 and the first water source pipeline 331 is located downstream of the first water supply valve 335. Thus, even when the first water supply valve 335 is closed, the first return water pipeline 220 can still return water to the low-temperature cold water tank 333 through the first water source pipeline 331. Optionally, a level gauge can also be installed in the low-temperature cold water tank 333. When the liquid level in the low-temperature cold water tank 333 is lower than the set water supply level, water can be added to the low-temperature cold water tank 333.

[0065] Furthermore, the water-cooled flow path 300 also includes an automatic ice-dropping machine 339, which is located above the low-temperature cold water tank 333 and is used to drop ice into the low-temperature cold water tank 333 to lower the temperature of the cold water in the tank. Optionally, the water-cooled flow path 300 also includes a second water source pipe 332, which is used to supply water required for ice making to the automatic ice-dropping machine 339. Specifically, one end of the second water source pipe 332 is connected to the first water source pipe 331, and the connection point is located downstream of the water supply pump 336, so that the water supply pump 336 can replenish water to the automatic ice-dropping machine 339 and the low-temperature cold water tank 333. A second water supply valve 340 is also installed on the second water source pipeline 332. The second water supply valve 340 is used to control the opening and closing of the second water source pipeline 332. Thus, when the water supply pump 336 is running, by controlling the opening and closing or the opening degree of the first water supply valve 335 and the second water supply valve 340, water can be supplied to the low temperature cold water tank 333 and / or the automatic ice removal machine 339.

[0066] Optionally, a chilled water temperature sensor 337 is also installed on the cooling supply line 334. The chilled water temperature sensor 337 is used to detect the temperature of the chilled water supplied to the chiller unit 310. Optionally, a chilled water circulation pump 338 is also installed on the cooling supply line 334, which pumps the chilled water in the low-temperature chilled water tank 333 to the chiller unit 310.

[0067] Furthermore, the multi-unit high-flow-rate engine water supply system 10 also includes a third water supply pipe 324. The two ends of the third water supply pipe 324 are connected to the first cooling water flow path 112 and the chiller unit 310, respectively, to introduce cooling water from the first cooling water flow path 112 into the chiller unit, thereby cooling the chiller unit 310. The multi-unit high-flow-rate engine water supply system 10 also includes a second return water pipe 141 and a third return water pipe 325. The second return water pipe 141 is used to return the cooling water after cooling the multiple engines 20 to the collection tank. The two ends of the third return water pipe 325 are connected to the chiller unit 310 and the second return water pipe 141, respectively, to introduce the cooling water after cooling the chiller unit 310 into the second return water pipe 141.

[0068] Specifically, the chiller unit 310 also has a cooling inlet 313 and a cooling outlet 314. The third water supply pipe 324 is connected to the cooling inlet 313, thereby introducing the cooling water in the first cooling water flow path 112 into the chiller unit 310 for heat dissipation during operation, meeting the cooling requirements of the chiller unit 310. The third return water pipe 325 is connected to the cooling outlet 314. The cooling water after cooling the chiller unit 310 enters the second return water pipe 141 through the third return water pipe 325, and then returns to the collection pool. The collection pool is connected to the cooling water inlet 111, thus forming a cooling water circulation. In other words, the cooling water in the multi-position high-flow engine water supply system 10 is circulating water.

[0069] Optionally, a flow regulating valve 326 is provided on the third water supply pipe 324 to regulate the flow rate of cooling water entering the chiller unit 310.

[0070] In this embodiment, the multi-unit high-flow-rate engine water supply system 10 also includes an electronic control system 400. All electrical components in the multi-unit high-flow-rate engine water supply system 10, such as sensors, valves, and pumps, are electrically connected to the electronic control system 400. Figure 1 The dashed lines represent electrical connections, while the solid lines represent waterway connections. The electronic control system 400 acquires signals from various sensors to control other valves and pumps, among other electrical components.

[0071] When the multi-unit high-flow engine water supply system 10 provided in the embodiments of the present invention is used, after the engine 20 is started, the opening of the flow distribution valve 120 and the opening of the flow regulating valve 326 are first adjusted according to the outlet water temperature and the cooling requirements of the engine 20 to ensure that the cooling water pressure and flow rate of the engine 20 meet the requirements under various operating conditions, while the chiller unit 310 is operating normally. When the outlet water temperature cannot meet the operating requirements of the engine 20, the opening of the flow distribution valve 120 can be adjusted according to the outlet water temperature signal detected by the outlet water temperature sensor 133, that is, the proportion of cooling water supplied by the second water supply pipe 115 can be increased. If adjusting the opening of the flow distribution valve 120 is no longer sufficient to meet the cooling requirements of the engine 20, the low-temperature water flow distribution valve 321 can be adjusted according to the outlet water temperature signal, so that some of the cold water flowing out from the chiller unit directly enters the second cooling water flow path 114 through the second pipe 323. When the signal value of the cold water temperature sensor 337 is greater than the set temperature, or the outlet water temperature detected by the outlet water temperature sensor 133 is higher than the test requirements, the automatic ice drop machine 339 and the second water supply valve 340 are activated to add ice to the low-temperature cold water tank 333 to reduce the temperature of the cold water supplied to the chiller unit 310. At the same time, based on the liquid level information in the low-temperature cold water tank 333, the opening of the first water supply valve 335, the second water supply valve 340, and the low-temperature water flow distribution valve 321 are adjusted to ensure the dynamic balance of liquid level and temperature.

[0072] The multi-unit high-flow engine water supply system 10 is equipped with multiple temperature regulation modes, such as post-cooling water heat exchange, ice addition to enhance cooling, and mixing of cooling water and cold water, as well as a cold water supply mode. During use, the cooling scheme can be adjusted according to the temperature feedback structure, which enhances the stability of the water supply temperature, speeds up the system response, and realizes flexible supply of cooling water and cold water.

[0073] In designing the water supply system for the multiple high-flow-rate engines 20, the first step was to select the test bench with the highest engine power. Based on the maximum cooling water flow required for the bench, the maximum natural supply water temperature in the laboratory during summer, and the required water temperature of the engines 20, the maximum heat exchange required for cooling the water at a single bench was calculated. Specifically, this maximum heat exchange Q... 换 Determined according to the following formula:

[0074] Q 换 =c 水2 m 水 ΔT2

[0075] ΔT2=T 冷却水 -T 柴

[0076] Among them, c 水2 The specific heat capacity of cooling water; m 水The mass of cooling water per unit time is calculated by the maximum cooling water flow rate 132 required by the engine with the highest power among the multiple engines 20; T 冷 Natural water supply temperature; T 柴 This is the required cooling water temperature for the most powerful of the 20 engines. Specifically, this natural water supply temperature can be set based on the average or highest summer temperature.

[0077] Secondly, based on the maximum heat exchange Q calculated above... 换 The heat exchange area of ​​heat exchanger 210 is calculated and selected. To ensure that energy loss during the cold water flow process does not affect the final supply temperature of the cooling water, the heat exchange area of ​​heat exchanger 210 should be selected to ensure that the heat exchange capacity Q is greater than the maximum heat exchange capacity Q. 换 That is, Q > Q 换 Optionally, in this embodiment, the heat exchange capacity of the heat exchanger 210 can be set to 1.5 times the maximum heat exchange capacity, i.e., Q = 1.5Q. 换 .

[0078] Then, when setting the circulating water volume of the chiller unit 310, the temperature loss during the operation of the chiller unit 310 and the heat exchange efficiency of the plate heat exchanger 210 are considered. Therefore, a margin of 1℃ to 2℃ should be left between the temperature of the chilled water exiting the heat exchanger 210 and the temperature of the cooling water in the second water supply pipe 115. That is, based on the selected heat exchanger 210, the required circulating water volume of the chiller unit 310 is calculated by using the chilled water temperature at the cold end outlet 212 of the heat exchanger 210, which is 1℃ to 2℃ lower than the theoretical cooling water temperature required in the second water supply pipe 115.

[0079] Finally, calculate the volume V of the low-temperature chilled water tank using the following formula:

[0080] V = V 机 +V 补 +V 水质管理

[0081] V machine = q 泵 *t / (ρ 水 ·c 水1 ·ΔT1)

[0082] V 水质管理 =5% (V) 机 +V 补 )

[0083] Among them, V 补 The volume required for ice throwing; q 泵 ρ is the cold end water circulation flow rate of chiller unit 310; t is the minimum operating time of chiller unit 310; 水 c is the density of cold water.水1 ΔT1 represents the specific heat capacity of cold water; ΔT1 represents the preset temperature fluctuation range.

[0084] Furthermore, the volume V required for ice throwing 补 The calculation can be performed based on the amount of heat reduction (Q_ice) that needs to be achieved by adding ice:

[0085] Q_ice = m 冰 L 冰 +c 水 m 水1 ΔT3

[0086] m 冰 =m 水3

[0087] Among them, L 冰 For the latent heat of melting ice, c 水 ΔT3 is the specific heat capacity of water, and ΔT3 is the temperature difference between the water temperature rising from 0℃ to the outlet temperature of the low-temperature cold water tank 333 (i.e., the temperature after cooling by the chiller unit 310).

[0088] Meanwhile, in order to ensure the accuracy of the inlet water parameters, the flow meter 132, the outlet water temperature sensor 133, and the outlet water pressure sensor 134 are arranged as close as possible to the inlet of the engine 20.

[0089] Embodiments of the present invention also provide a method for supplying water to multiple high-flow-rate engines. This method is implemented based on the aforementioned water supply system 10 for multiple high-flow-rate engines. In other words, the electronic control system 400 in the aforementioned water supply system 10 for multiple high-flow-rate engines can execute this method to control the water supply system 10 for multiple high-flow-rate engines.

[0090] Specifically, the water supply method for multiple high-flow-rate generators includes the following steps:

[0091] S01: Obtain the target platform position.

[0092] The target test site is determined based on the location of the engine 20 to be tested. This target test site is the site where the engine 20 that needs to be cooled is located.

[0093] S02: Controls the operation of the flow distribution valve 120 corresponding to the target position.

[0094] Specifically, when the above-mentioned multi-position high-flow engine water supply system 10 is used for the first time, multiple flow distribution valves 120 can be set to the state where the first water supply pipe 113 is fully open and the second water supply pipe 115 is fully closed. Then, the opening degree of the flow distribution valve 120 corresponding to the target position is adjusted according to the cooling requirements of the target position.

[0095] S03: Obtain the outlet water parameters of the flow distribution valve 120 corresponding to the target station position, and control the valve position of the flow distribution valve 120 according to the outlet water parameters.

[0096] The outlet water parameters include outlet water temperature. Specifically, in this embodiment, the outlet water parameters also include outlet water pressure and outlet water flow rate. The valve position of the flow distribution valve 120 is adjusted according to the outlet water temperature, thereby adjusting the ratio of cooling water flowing from the first water supply pipe 113 and the second water supply pipe 115. At the same time, the outlet water pressure and outlet water flow rate are monitored to ensure that the outlet water pressure and outlet water flow rate are within the required range when the outlet water temperature meets the requirements.

[0097] Meanwhile, during the operation of the chiller unit 310, cooling water needs to be supplied through the third water supply pipe 324. Therefore, during operation, the opening of the flow regulating valve 326 also needs to be adjusted. Specifically, when the multi-position high-flow engine water supply system 10 is used for the first time, the valve position of the flow regulating valve 326 can be set to open 1 / 3.

[0098] Since the multi-unit high-flow-rate engine water supply system 10 uses a chiller unit 310 for cooling and needs to meet the cooling requirements in summer, if the cooling requirements cannot be met by adjusting in step S03 during the test, it can be adjusted by controlling the low-temperature water flow distribution valve 321. Accordingly, the multi-unit high-flow-rate engine water supply method may also include:

[0099] S04: Control the valve position of the low-temperature water flow distribution valve 321 according to the outlet water parameters so as to directly mix part of the chilled water from the chiller unit 310 into the second cooling water flow path 114.

[0100] By controlling the valve position of the low-temperature water flow distribution valve 321, some cold water is directly mixed into the second cooling water flow path 114, further reducing the temperature of the cooling water in the second cooling water flow path 114. Specifically, when the above-mentioned multi-position high-flow engine water supply system 10 is used for the first time, the valve position of the low-temperature water flow distribution valve 321 can be set to a position where both the first pipeline 322 and the second pipeline 323 are fully closed.

[0101] Furthermore, if the cooling requirements cannot be met by adjusting in step S04, ice can be added to the low-temperature cold water tank 333 to reduce the temperature of the cold water entering the chiller unit 310, thereby further reducing the heat exchange efficiency and achieving the purpose of reducing the cooling water temperature in the second cooling water flow path 114. Accordingly, the water supply method for multiple high-flow engines can also include:

[0102] S05: Control the automatic ice-dropping machine 339 to add ice to the low-temperature cold water tank 333 according to the water output parameters in order to reduce the cold water temperature.

[0103] Specifically, during the process of controlling the automatic ice-feeding machine 339 to add ice to the low-temperature cold water tank 333, the second water supply valve 340 and the water supply pump 336 can be opened as needed. At the same time, the opening and closing of the first water supply valve 335 can also be controlled according to the liquid level in the low-temperature cooling tank.

[0104] Specifically, when the aforementioned multi-unit high-flow engine water supply system 10 is used for the first time, the first water supply valve 335 and the second water supply valve 340 can be set to be fully closed. Then, during use, it can be set to open the first water supply valve 335 and the water supply pump 336 when the liquid level in the low-temperature cold water tank 333 is less than or equal to 50% to replenish water to the low-temperature cold water tank 333. The liquid level in the low-temperature cold water tank 333 is greater than or equal to V. 机 The automatic ice-removing machine 339 can be set to stop replenishing water when the water level in the low-temperature cold water tank 333 reaches 95% or when the temperature value of the outlet water temperature sensor 133 meets the water temperature requirements of the engine 20.

[0105] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-bank high-flow engine water supply system for supplying cooling water to a plurality of engine banks; characterized by, The multi-station large-flow engine water supply system comprises: a cooling water flow path having a cooling water inlet, a first cooling water flow path and a second cooling water flow path, both of which are in communication with the cooling water inlet; a plurality of first water supply pipes distributed along the flow direction are arranged on the first cooling water flow path, and the plurality of first water supply pipes are respectively and correspondingly connected with the plurality of flow distribution valves; a heat exchanger is arranged on the second cooling water flow path, and a plurality of second water supply pipes distributed along the flow direction are arranged on the part of the second cooling water flow path downstream of the heat exchanger, and the plurality of second water supply pipes are respectively and correspondingly connected with the plurality of flow distribution valves; the flow distribution valve is used to be connected with an engine, and is used to mix the cooling water in the first water supply pipe and the cooling water in the second water supply pipe according to a preset ratio, and supply the mixed cooling water to the engine; and a water cooling flow path comprising a water chiller, which is in communication with the heat exchanger to provide cold water to the heat exchanger and cool the cooling water in the second cooling water flow path through the heat exchanger; the water cooling flow path further comprises a first pipeline, a low-temperature water flow distribution valve and a second pipeline; the low-temperature water flow distribution valve is installed at the cold water outlet of the water chiller; one end of the first pipeline is connected with the low-temperature water flow distribution valve, and the other end is connected with the heat exchanger to supply the cold water from the water chiller to the heat exchanger; one end of the second pipeline is connected with the low-temperature water flow distribution valve, and the other end is in communication with the second cooling water flow path, and the communication position is located downstream of the heat exchanger and closest to the upstream of the second water supply pipe of the heat exchanger; the low-temperature water flow distribution valve is used to control the flow of the first pipeline and the second pipeline; the water cooling flow path further comprises a first water source pipeline, a cooling supply pipeline, a low-temperature cold water tank and a first return water pipeline; the first water source pipeline is in communication with the low-temperature cold water tank to supply water to the low-temperature cold water tank; both ends of the cooling supply pipeline are connected with the low-temperature cold water tank and the water chiller respectively to supply water to the water chiller; both ends of the first return water pipeline are in communication with the heat exchanger and the first water source pipeline respectively to realize cold water circulation; the water cooling flow path further comprises an automatic ice falling machine, which is arranged on the upper side of the low-temperature cold water tank and is used to drop ice into the low-temperature cold water tank to reduce the temperature of the cold water in the low-temperature cold water tank.

2. The multi-station large-flow engine water supply system according to claim 1, wherein a cold water temperature sensor is arranged on the cooling supply pipeline, and the cold water temperature sensor is used to detect the temperature of the cold water supplied to the water chiller.

3. The multi-station large-flow engine water supply system according to claim 1, wherein the volume V of the low-temperature cold water tank is determined by the following formula: V = V 机 +V 补 +V 水质管理 Vmachine = q 泵 * t / (p 水 * c 水1 * ΔT1) V 水质管理 = 5% (V 机 + V 补 ) Among them, V 补 The volume required for ice throwing; q 泵 ρ is the cold end water circulation flow rate of the chiller unit; t is the minimum operating time of the chiller unit; 水 c is the density of cold water. 水1 ΔT1 represents the specific heat capacity of cold water; ΔT1 represents the preset temperature fluctuation range.

4. The multi-station large-flow engine water supply system according to claim 1, wherein The multi-position large-flow engine water supply system further comprises a third water supply pipe, two ends of the third water supply pipe being respectively communicated with the first cooling water channel and the water chiller, so as to introduce the cooling water in the first cooling water flow path into the water chiller through the third water supply pipe and cool the water chiller; The multi-position large-flow engine water supply system further comprises a second water return pipe and a third water return pipe, the second water return pipe being used for returning the cooling water after cooling the multiple engines to the water collecting pool, and two ends of the third water return pipe being respectively communicated with the water chiller and the second water return pipe, so as to introduce the cooling water after cooling the water chiller into the second water return pipe.

5. The multi-position large-flow engine water supply system according to claim 1, wherein, The heat exchange amount Q of the heat exchanger is determined by the following formula: Q > Q 换 Q 换 = c 水2 m 水 ΔT2 ΔT2 = T 冷 -T 柴 wherein c 水2 is the specific heat capacity of the cooling water; m 水 is the mass of the cooling water per unit time calculated from the maximum cooling water flow required by the one of the plurality of engines having the maximum power; T 冷 is the natural water supply temperature; T 柴 is the cooling water temperature required by the one of the plurality of engines having the maximum power.

6. A method for supplying water to a multi-station high-flow engine, characterized by, The multi-position large-flow engine water supply method is realized according to the multi-position large-flow engine water supply system according to claim 1, and the multi-position large-flow engine water supply method comprises: Obtaining a target position; wherein the target position is a position of an engine requiring cooling; Controlling the flow distribution valve corresponding to the target position to act; Obtaining the water outlet parameter of the flow distribution valve corresponding to the target position, and controlling the valve position of the flow distribution valve according to the water outlet parameter; wherein the water outlet parameter comprises a water outlet temperature.

7. The multi-station high-flow engine water supply method of claim 6, wherein, The multi-position large-flow engine water supply method further comprises: Controlling the valve position of the low-temperature water flow distribution valve according to the water outlet parameter, so as to directly mix part of the cooling water from the water chiller into the second cooling water flow path.

8. The multi-station high-flow engine water supply method of claim 6, wherein, The multi-position large-flow engine water supply method further comprises: Controlling the automatic ice falling machine to throw ice into the low-temperature cooling water tank according to the water outlet parameter, so as to reduce the cooling water temperature.

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