A multi-unit power supply cabin adopting centralized heat dissipation

Abstract

The application relates to a multi-unit power supply cabin with centralized heat dissipation, which comprises N1 unit cabins and a heat dissipation cabin; a water-cooled supercharged engine and a generator are arranged in each unit cabin to form a generator set; the water-cooled supercharged engine drives the generator to work, and the chemical energy of fuel is converted into electric energy output for power supply; a water inlet pipe, a water return pipe, an air inlet pipe and an air return pipe are connected between the heat dissipation cabin and each unit cabin; the cooling water of the water-cooled supercharged engine in each unit cabin enters the heat dissipation cabin through the water inlet pipe to be cooled and dissipated, and the cooled cooling water returns to the water-cooled supercharged engine through the water return pipe; the supercharged gas of the water-cooled supercharged engine in each unit cabin enters the heat dissipation cabin through the air inlet pipe to be cooled and dissipated, and the cooled supercharged gas returns to the water-cooled supercharged engine through the air return pipe. The application improves the reliability of the heat dissipation system, and further improves the reliability of the unit.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology, specifically relating to a multi-unit power supply compartment that employs centralized heat dissipation. Background Technology

[0002] Currently, the power compartments of power supply vehicles are becoming increasingly larger, and the power output per vehicle is also increasing. However, the reliability of a single vehicle is generally based on a series connection, and its reliability depends on the weakest link in the power generation equipment, typically the prime mover. Improving reliability requires addressing the technical challenges of this weak link, such as improving the materials used in the prime mover to enhance its wear resistance, refining the manufacturing process to achieve better clearances, and modifying the working principle to develop a more reliable prime mover. However, given the current level of industrial technology, there are no better ways to improve the reliability of the power compartment. To enhance the reliability of power supply vehicles, a multi-unit power supply vehicle approach is proposed. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to disclose a multi-unit power supply compartment with centralized heat dissipation to improve the reliability of the power supply vehicle.

[0004] This invention discloses a multi-unit power supply compartment with centralized heat dissipation; comprising N1 unit compartments and one heat dissipation compartment;

[0005] Each of the aforementioned unit compartments is equipped with a generator set consisting of a water-cooled turbocharged engine and a generator; the water-cooled turbocharged engine in the generator set drives the generator to work, converting the chemical energy of the fuel into electrical energy to output power.

[0006] The heat dissipation compartment is connected to each unit compartment by an inlet water pipe, a return water pipe, an air inlet pipe, and an air return pipe;

[0007] Cooling water from the water-cooled turbocharged engine in each unit compartment is introduced into the heat dissipation compartment through the inlet pipe for cooling, and the cooled water is returned to the water-cooled turbocharged engine through the return pipe.

[0008] The pressurized gas from the water-cooled turbocharged engine in each engine compartment is fed into the heat dissipation compartment for cooling through the intake pipe, and the cooled pressurized gas is returned to the water-cooled turbocharged engine through the return pipe.

[0009] Furthermore, each of the air intake pipes connecting the unit compartment and the heat dissipation compartment also includes a second booster, which performs secondary pressurization on the pressurized gas entering the heat dissipation compartment through the air intake pipe.

[0010] Furthermore, the second booster is an ejector structure, including an air inlet, an air outlet, and an ejector port; wherein,

[0011] The air inlet is connected to the air intake pipe in the direction of the engine compartment to introduce the boost gas output from the water-cooled turbocharged engine;

[0012] The air outlet is connected to the air inlet pipe in the direction of the heat dissipation chamber, which is used to output the pressurized gas after ejection to the heat dissipation chamber.

[0013] The ejector port is used to introduce high-pressure gas with a pressure higher than that of the boost gas output by the water-cooled turbocharged engine.

[0014] The second turbocharger uses high-pressure gas introduced through the ejector port to eject the boost gas output from the water-cooled turbocharged engine, further increasing the pressure of the boost gas before outputting it to the heat dissipation chamber.

[0015] Furthermore, the heat dissipation chamber includes a water-cooled heat sink assembly, an air-cooled heat sink assembly, and a heat dissipation fan;

[0016] The water-cooled heat sink assembly is used to dissipate heat and cool the cooling water groups entering each water-cooled turbocharged engine, and then return the cooled water to each water-cooled turbocharged engine.

[0017] The air-cooled heat sink assembly is used to cool the incoming secondary pressurized gas groups and then return the cooled gas to each water-cooled turbocharged engine.

[0018] The cooling fan is used to cool the water-cooled heat sink assembly and the air-cooled heat sink assembly.

[0019] Furthermore, the water-cooled heat sink assembly includes N2 water-cooled heat sinks, an inlet water distributor, and an outlet water distributor; each water-cooled heat sink has a built-in water pipe; the water-cooled heat sink physically dissipates heat from the water entering the water pipe;

[0020] Each water-cooled heat sink has a small valve at both ends; the small valves are connected to the inlet and outlet water distributors respectively; the small valves are used to control the flow and shut-off of water on the heat sink.

[0021] The water inlet distributor includes N1 inlets and N2 outlets. The N1 inlets are connected to the water inlet pipes of the N1 unit compartments respectively; the N2 outlets are connected to the small valves connected to the water inlet ends of the N2 water-cooled heat sinks respectively.

[0022] The water distributor includes N2 inlets and N1 outlets. The N2 inlets are connected to small valves that connect to the water outlets of the N2 water-cooled radiators. The N1 outlets are connected to the return water pipes of the N1 unit compartments.

[0023] Furthermore, the air-cooled heat sink assembly includes N3 air-cooled heat sinks, an air inlet distributor, and an air outlet distributor; each air-cooled heat sink has a built-in air pipe; the air-cooled heat sink physically dissipates heat from the air entering the air pipe;

[0024] Each air-cooled heat sink has a small valve at both ends; the small valves are connected to the air inlet distributor and the air outlet distributor respectively; the small valves are used to control the flow and shut-off of air on the heat sink.

[0025] The air intake distributor includes N1 air inlets and N3 air outlets. The N1 air inlets are connected to the air intake pipes of N1 unit compartments respectively; the N3 air outlets are connected to the small valves connected to the air inlet ends of N3 air-cooled heat sinks respectively.

[0026] The exhaust distributor includes N3 air inlets and N1 air outlets. The N3 air inlets are connected to small valves that are connected to the exhaust ends of the N3 air-cooled heat sinks. The N1 air outlets are connected to the return air pipes of the N1 unit compartments.

[0027] Furthermore, the cooling fan adopts a multi-fan structure, including N4 groups of fans, each group of fans operating independently and stopping and starting separately.

[0028] Furthermore, the water-cooled heat sink assembly, the air-cooled heat sink assembly, and the cooling fan adopt a three-layer arrangement structure; the cooling air blown out by the cooling fan first passes through the air-cooled heat sink assembly, then through the water-cooled heat sink assembly, and then is blown out of the heat dissipation chamber.

[0029] Furthermore, the heat dissipation chamber also includes a temperature detection sensor and a fan controller;

[0030] The temperature detection sensor includes a water temperature sensor group and an air temperature sensor group;

[0031] Each temperature sensor in the water temperature sensor group is installed in the outlet of the water cooling heat sink group connected to each return water pipe;

[0032] Each temperature sensor in the air temperature sensor group is located in the air outlet where the air-cooled heat sink group connects to each return air pipe;

[0033] The fan controller controls the number of fan groups operating in the cooling fan based on the temperature values ​​collected by the water temperature sensor group and the air temperature sensor group.

[0034] When the collected temperature value of the water outlet is lower than the lower limit of the first water temperature threshold range, and the temperature value of the air outlet is lower than the lower limit of the first air temperature threshold range, the motor in the cooling fan does not work, and heat dissipation is achieved through natural convection between multiple heat sinks and the air.

[0035] When the collected temperature value of the water outlet is within the first water temperature threshold range or / and when the collected temperature value of the air outlet is within the first air temperature threshold range, the fan controller controls the first group of fans in the cooling fan to work.

[0036] When the collected temperature value of the water outlet is within the second water temperature threshold range or / and when the collected temperature value of the air outlet is within the second air temperature threshold range, the fan controller controls the second group of fans in the cooling fan to start working.

[0037] As the water and air temperatures gradually increase, the water temperature and air temperature threshold ranges are determined step by step, and more sets of fans are turned on until the N4th set of fans is working.

[0038] When the N4 group of fans starts, the heat dissipation capacity of the heat dissipation compartment reaches its maximum, which is suitable for the full-load operation of all units.

[0039] Furthermore, the load is automatically distributed by monitoring the output power of the units in the N1 unit cabins;

[0040] When the output power increases, the second unit will automatically start when it reaches 80% of the rated power of a single unit; the third unit will automatically start when the output power reaches 80% of the sum of the rated power of the two units; and so on until the power supply compartment of the unit is operating at full power.

[0041] When the output power decreases, the number of working units is reduced accordingly; when reducing the number of working units, control delay and dynamic prediction of output power are performed.

[0042] If the dynamic prediction result indicates that the decrease in output power is only instantaneous, and the output power will increase again after the control delay time, then the number of output units will not be reduced.

[0043] When the dynamic prediction result indicates a non-instantaneous decrease in output power, the number of output units is reduced after a control delay time.

[0044] This invention can achieve at least one of the following beneficial effects:

[0045] This invention employs a multi-unit power supply compartment with centralized heat dissipation. Each unit is an independent compartment, meaning that each unit in the power supply vehicle does not affect the others, and each functions independently, forming a complete unit. Centralized heat dissipation is used to exchange heat from multiple units through a unified cooling compartment. The centralized cooling compartment uses a multi-radiator, multi-fan arrangement, which ensures functional independence for each unit while also guaranteeing fan redundancy, improving the reliability of the cooling system and consequently enhancing the reliability of the units.

[0046] Furthermore, the multi-unit power compartment can distribute the output power of the power vehicle by connecting multiple units in parallel. When the output power of the power vehicle is low, the number of units operating in the power vehicle can be reduced, so that each unit is in a better working area, which can improve the service life of the power vehicle, improve the reliability of the power vehicle, improve the emissions of the power vehicle, improve the thermal efficiency of the power vehicle, and each unit can serve as a backup for each other, which can reduce the number and types of spare parts. Attached Figure Description

[0047] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0048] Figure 1 This is a schematic diagram of the multi-unit power supply compartment structure in an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the second booster connection in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the water-cooled heat sink assembly structure in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the air-cooled heat sink assembly structure in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of the group layout of the cooling fans in an embodiment of the present invention. Detailed Implementation

[0053] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0054] One embodiment of the present invention discloses a multi-unit power supply compartment employing centralized heat dissipation, using the power supply compartment of a power supply vehicle as an example. The power supply vehicle includes a carrier, a power supply compartment, a control cabinet, output cables, etc. The carrier is mainly used to load the power supply compartment, control cabinet, and other components, giving the power supply vehicle independence and self-propelled capability. The generator sets in the power supply compartment are mainly used to convert the chemical energy of fuel into electrical energy. The control cabinet is used for controlling and distributing power to each generator set. The output cables are used to output power from the power supply vehicle to electrical equipment or to connect to the power grid for power transmission.

[0055] The power supply compartment is a multi-unit power supply compartment with centralized heat dissipation, such as... Figure 1 As shown, it includes N1 unit compartments and one heat dissipation compartment;

[0056] Each of the aforementioned unit compartments is equipped with a generator set consisting of a water-cooled turbocharged engine and a generator; the water-cooled turbocharged engine in the generator set drives the generator to work, converting the chemical energy of the fuel into electrical energy to output power.

[0057] The heat dissipation compartment is connected to each unit compartment by an inlet water pipe, a return water pipe, an air inlet pipe, and an air return pipe;

[0058] Cooling water from the water-cooled turbocharged engine in each unit compartment is introduced into the heat dissipation compartment through the inlet pipe for cooling, and the cooled water is returned to the water-cooled turbocharged engine through the return pipe.

[0059] The pressurized gas from the water-cooled turbocharged engine in each engine compartment is fed into the heat dissipation compartment for cooling through the intake pipe, and the cooled gas is returned to the water-cooled turbocharged engine through the return pipe.

[0060] The control cabinet adopts a modular design, aggregating the outputs of multiple generator sets and unifying their outputs through a single interface. The cabinet contains a multi-generator controller. This controller controls and monitors multiple generator sets, displays the real-time operating status of each set, models and processes the operating data, provides suggestions for optimizing unit operation, facilitates appropriate maintenance and upkeep, and anticipates potential problems and malfunctions.

[0061] In this embodiment, each generator set is an independent compartment, meaning that each unit in the power vehicle operates independently, without affecting the others, and functions as a complete unit. The necessary components for unit operation are arranged within each independent compartment, including the water-cooled turbocharged engine, generator, control unit, fuel supply unit, exhaust treatment unit, intake treatment unit, and cooling system. This rational arrangement ensures both the aesthetics and functionality of the internal layout of the independent compartments, while guaranteeing that the necessary conditions for unit operation are met.

[0062] When centralized cooling is used, the heat from multiple units is exchanged through a centralized cooling chamber. This improves the reliability of the cooling system, thereby enhancing the reliability of the generating units.

[0063] Because of the centralized cooling system in the radiator compartment, the water-cooled turbocharged engine is located a considerable distance from the radiator compartment. As this distance increases, the length of the intake and return air pipes, the length of the gas cooling pipes in the radiator compartment, and the increased number of bends in the gas piping from the engine to the radiator compartment all contribute to a greater pressure drop in the gas within the piping. Excessive intake pressure loss leads to a decrease in engine output capacity. The intake and return water piping, on the other hand, is relatively stable due to the engine's high water pump head and the relatively smaller losses in the water piping compared to the air piping. Therefore, the engine's capacity is generally not reduced due to insufficient water flow caused by excessively long water pipes and numerous bends.

[0064] To address the issue of significant gas path losses, in this embodiment, the intake pipe connecting each engine compartment and the cooling compartment further includes a second turbocharger. This second turbocharger re-pressurizes the pressurized gas entering the cooling compartment through the intake pipe. This increases the gas pressure and prevents excessive intake pressure loss from causing a decrease in engine output capacity.

[0065] like Figure 2 As shown, the second booster is an ejector structure, including an air inlet 1, an air outlet 2, and an ejector 3; wherein,

[0066] The air inlet is connected to the air intake pipe in the direction of the engine compartment to introduce the boost gas output from the water-cooled turbocharged engine;

[0067] The air outlet is connected to the air inlet pipe in the direction of the heat dissipation chamber, which is used to output the pressurized gas after ejection to the heat dissipation chamber.

[0068] The ejector port is used to introduce high-pressure gas with a pressure higher than that of the boost gas output by the water-cooled turbocharged engine.

[0069] The second turbocharger uses high-pressure gas introduced through the ejector port to eject the boost gas output from the water-cooled turbocharged engine, further increasing the pressure of the boost gas before outputting it to the heat dissipation chamber.

[0070] The ejector has a small structure, no moving parts, and is not easily damaged, reducing the space occupied by the unit and its accessories, which has more significant advantages. Furthermore, it can maintain gas pressure and ensure engine operation by boosting pressure through the ejector when the engine's own gas booster pump fails.

[0071] Preferably, the high-pressure gas introduced through the ejector port can come from a high-pressure gas cylinder.

[0072] In a more preferred embodiment, the gas passage connecting the high-pressure gas cylinder to each second booster ejector port also includes a solenoid valve, which is controlled by the control cabinet.

[0073] In the specific control method, the controller in the control cabinet, while controlling and monitoring multiple units, identifies the working generator set and opens the solenoid valve corresponding to that unit, causing the second booster connected to that unit to work and provide secondary boosting.

[0074] In extreme cases, when a unit needs to operate but the gas booster pump inside the unit fails to pressurize, the controller can open all solenoid valves except the one associated with the unit, so that the high-pressure gas cylinder only supplies pressurized gas to the unit, maintaining the normal operation of the unit.

[0075] The heat dissipation chamber in this embodiment includes a water-cooled heat sink assembly, an air-cooled heat sink assembly, and a cooling fan;

[0076] The water-cooled heat sink assembly is used to dissipate heat and cool the cooling water groups entering each water-cooled turbocharged engine, and then return the cooled water to each water-cooled turbocharged engine.

[0077] The air-cooled heat sink assembly is used to cool the incoming secondary pressurized gas groups and then return the cooled gas to each water-cooled turbocharged engine.

[0078] The cooling fan is used to cool the water-cooled heat sink assembly and the air-cooled heat sink assembly.

[0079] To ensure optimal operation of each generator unit, the cooling compartment requires multiple cooling fans with variable speed functionality. Furthermore, the water flow back to each generator needs to be matched within the heat sink assembly to maintain a favorable operating environment for all units. The control strategy for these multiple fans requires comprehensive consideration, employing variable speed drive and start-stop control. This approach also helps control generator noise levels.

[0080] like Figure 3 As shown, the water-cooled heat sink assembly includes N2 water-cooled heat sinks, each with a built-in water pipe; the water-cooled heat sinks physically dissipate heat from the water entering the water pipes.

[0081] Each water-cooled heat sink has a small valve at both ends; the small valves are connected to the inlet and outlet water distributors respectively; the small valves are used to control the flow and shut-off of water on the heat sink.

[0082] The water-cooled heat sink assembly also includes an inlet distributor and an outlet distributor;

[0083] The water inlet distributor includes N1 inlets and N2 outlets. The N1 inlets are connected to the water inlet pipes of the N1 unit compartments respectively; the N2 outlets are connected to the small valves connected to the water inlet ends of the N2 water-cooled heat sinks respectively.

[0084] The water distributor includes N2 inlets and N1 outlets. The N2 inlets are connected to small valves that connect to the water outlets of the N2 water-cooled radiators. The N1 outlets are connected to the return water pipes of the N1 unit compartments.

[0085] like Figure 4 As shown, the air-cooled heat sink assembly includes N3 air-cooled heat sinks, each with a built-in air pipe; the air-cooled heat sinks physically dissipate heat from the air entering the air pipes.

[0086] Each air-cooled heat sink has a small valve at both ends; the small valves are connected to the air inlet distributor and the air outlet distributor respectively; the small valves are used to control the flow and shut-off of air on the heat sink.

[0087] Air-cooled heat sinks also include an intake distributor and an exhaust distributor;

[0088] The air intake distributor includes N1 air inlets and N3 air outlets. The N1 air inlets are connected to the air intake pipes of N1 unit compartments respectively; the N3 air outlets are connected to the small valves connected to the air inlet ends of N3 air-cooled heat sinks respectively.

[0089] The exhaust distributor includes N3 air inlets and N1 air outlets. The N3 air inlets are connected to small valves that are connected to the exhaust ends of the N3 air-cooled heat sinks. The N1 air outlets are connected to the return air pipes of the N1 unit compartments.

[0090] Preferably, the water pipes in the water-cooled heat sink and the air pipes in the air-cooled heat sink have different pipe shapes, with the air pipes having a flatter pipe structure compared to the water pipes.

[0091] Specifically, the cooling fan adopts a multi-fan structure, including N4 groups of fans, each group of fans operating independently and stopping and starting separately.

[0092] like Figure 5 As shown, a preferred arrangement for the fan groups is a longitudinal array, but changes to the fan grouping method are still within the scope of this invention. Each group of cooling fans operates independently and can be operated and stopped individually. The external dimensions of the cooling fans match the external dimensions of the radiator.

[0093] Preferably, the water-cooled heat sink assembly, the air-cooled heat sink assembly, and the cooling fan are arranged in a three-layer structure. The cooling air blown out by the cooling fan first passes through the air-cooled heat sink assembly, then through the water-cooled heat sink assembly, and finally exits the cooling chamber. For example, if there is a heat dissipation hole at the top of the cooling chamber, the cooling fan, air-cooled heat sink assembly, and water-cooled heat sink assembly are arranged sequentially from bottom to top to the location of the heat dissipation hole at the top of the cooling chamber. The advantage of this arrangement is that it can lower the temperature of the compressed gas further, ensuring the density of the compressed gas; and it can prevent the temperature of the cooling water from dropping too low, causing damage to the machine.

[0094] Specifically, the heat dissipation chamber also includes a temperature detection sensor and a fan controller;

[0095] The temperature detection sensor includes a water temperature sensor group and an air temperature sensor group;

[0096] Each temperature sensor in the water temperature sensor group is installed in the outlet of the water cooling heat sink group connected to each return water pipe;

[0097] Each temperature sensor in the air temperature sensor group is located in the air outlet where the air-cooled heat sink group connects to each return air pipe;

[0098] The fan controller controls the number of fan groups operating in the cooling fan based on the temperature values ​​collected by the water temperature sensor group and the air temperature sensor group.

[0099] When the collected temperature value of the water outlet is lower than the lower limit of the first water temperature threshold range, and the temperature value of the air outlet is lower than the lower limit of the first air temperature threshold range, the motor in the cooling fan does not work, and heat dissipation is achieved through natural convection between multiple heat sinks and the air.

[0100] As the unit load increases, the water temperature and air temperature in the heat dissipation compartment gradually increase;

[0101] When the collected temperature value of the water outlet is within the first water temperature threshold range or / and when the collected temperature value of the air outlet is within the first air temperature threshold range, the fan controller controls the first group of fans in the cooling fan to work.

[0102] As the water temperature and air temperature gradually increase, when the collected temperature value at the water outlet rises to the range of the second water temperature threshold or / and when the collected temperature value at the air outlet rises to the range of the second air temperature threshold, the fan controller controls the second set of fans in the cooling fan to start working.

[0103] As the water and air temperatures gradually increase, the water temperature and air temperature threshold ranges are determined step by step, and the third set of cooling fans is turned on until the N4 set of fans starts working.

[0104] When the N4 group of fans starts, the heat dissipation capacity of the heat dissipation compartment reaches its maximum, which is suitable for the full-load operation of all units.

[0105] The control is reversed when the unit load decreases and the water temperature and air temperature in the heat dissipation compartment gradually decrease.

[0106] The second water temperature threshold is higher than the first water temperature threshold, and the second air temperature threshold is higher than the first air temperature threshold; the temperature thresholds are set according to the actual engineering situation.

[0107] The heat dissipation chamber structure in this embodiment has the following advantages:

[0108] When one or more heat sinks leak liquid or air, the leak can be shut off by the valves at both ends, thereby bypassing the faulty heat sink and ensuring the unit operates without failure.

[0109] Multiple cooling fans can reduce the energy consumption of the cooling device; at the same time, under normal operating conditions, stopping or starting one or two sets of fans will not affect the operation of the unit or its output power, thus improving the reliability of the unit.

[0110] Using multiple cooling fans can reduce the noise of the unit.

[0111] Specifically, the power supply vehicle's control cabinet automatically distributes the load by monitoring the output power of the N1 generator units in the generator power compartment.

[0112] When the output power increases, the second unit will automatically start when it reaches 80% of the rated power of a single unit; the third unit will automatically start when the output power reaches 80% of the sum of the rated power of the two units; and so on until the power supply compartment of the unit is operating at full power.

[0113] When the output power decreases, the number of working units is reduced accordingly; when reducing the number of working units, control delay and dynamic prediction of output power are performed.

[0114] If the dynamic prediction result indicates that the decrease in output power is only instantaneous, and the output power will increase again after the control delay time, then the number of output units will not be reduced.

[0115] When the dynamic prediction result indicates a non-instantaneous decrease in output power, the number of output units is reduced after a control delay time.

[0116] Specifically, based on the data automatically collected from each operation of the power compartment, a self-judgment logic for output power is formed. When the output power decreases, the controller starts a delay. If the output power is consistently less than 80% of the sum of the rated output power of multiple units within the delay period, the self-judgment logic confirms that the output power has decreased and reduces the number of output units. If the output power is not consistently less than 80% of the sum of the rated output power of multiple units within the delay period, the self-judgment logic determines that the decrease in output power is only instantaneous and that the output power will increase again after the delay period, so the number of output units will not be reduced.

[0117] In a preferred embodiment, one of the N1 generator units is reserved as a backup unit. A multi-use, one-backup scheme is adopted. For example, if the power supply vehicle has an output power of 150kW, it requires three generator units for output, with two in use and one as backup; therefore, the output power of each generator unit is 75kW. The three generator units operate in parallel, and the parallel control equipment for each unit is located in the control cabinet. The parallel control equipment for each unit adjusts various parameters of the individual unit and the busbar after parallel connection. When the parallel operation conditions are met, a parallel operation closing command is output, allowing the unit to be connected to the busbar. By using a multi-use, one-backup scheme, the reliability of the power supply vehicle can be significantly improved.

[0118] In summary, the multi-unit power supply compartment with centralized heat dissipation disclosed in this invention features an independent compartment for each unit. This means that each unit in the power supply vehicle operates independently, without affecting the others, and functions as a complete unit. Centralized heat dissipation ensures that the heat from multiple units is exchanged uniformly within the centralized heat dissipation compartment. The centralized heat dissipation compartment employs a multi-radiator, multi-fan arrangement, which not only ensures functional independence for each unit but also guarantees fan redundancy, enhancing the reliability of the heat dissipation system and thus improving the overall reliability of the units.

[0119] Furthermore, the multi-unit power compartment can distribute the output power of the power vehicle by connecting multiple units in parallel. When the output power of the power vehicle is low, the number of units operating in the power vehicle can be reduced, so that each unit is in a better working area, which can improve the service life of the power vehicle, improve the reliability of the power vehicle, improve the emissions of the power vehicle, improve the thermal efficiency of the power vehicle, and each unit can serve as a backup for each other, which can reduce the number and types of spare parts.

[0120] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes 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-unit power supply compartment employing centralized heat dissipation; characterized in that, Includes N1 unit compartments and one heat dissipation compartment; Each of the aforementioned unit compartments is equipped with a generator set consisting of a water-cooled turbocharged engine and a generator; the water-cooled turbocharged engine in the generator set drives the generator to work, converting the chemical energy of the fuel into electrical energy to output power. The heat dissipation compartment is connected to each unit compartment by a water inlet pipe, a water return pipe, an air inlet pipe, and an air return pipe; Cooling water from the water-cooled turbocharged engine in each unit compartment is introduced into the heat dissipation compartment through the inlet pipe for cooling, and the cooled water is returned to the water-cooled turbocharged engine through the return pipe. The pressurized gas from the water-cooled turbocharged engine in each engine compartment is fed into the heat dissipation compartment for cooling through the intake pipe, and the cooled pressurized gas is returned to the water-cooled turbocharged engine through the return pipe. The heat dissipation chamber includes a water-cooled heat sink assembly, an air-cooled heat sink assembly, and a heat dissipation fan; The water-cooled heat sink assembly is used to dissipate heat and cool the cooling water groups entering each water-cooled turbocharged engine, and then return the cooled water to each water-cooled turbocharged engine. The air-cooled heat sink assembly is used to cool the incoming secondary pressurized gas groups and then return the cooled gas to each water-cooled turbocharged engine. The cooling fan is used to dissipate heat and cool the water-cooled heat sink assembly and the air-cooled heat sink assembly. The water-cooled heat sink assembly includes N2 water-cooled heat sinks, an inlet water distributor, and an outlet water distributor; each water-cooled heat sink has a built-in water pipe; the water-cooled heat sink physically dissipates the water entering the water pipe. Each water-cooled heat sink has a small valve at both ends; the small valves are connected to the inlet and outlet water distributors respectively; the small valves are used to control the flow and shut-off of water on the heat sink. The water inlet distributor includes N1 inlets and N2 outlets. The N1 inlets are connected to the water inlet pipes of the N1 unit compartments respectively; the N2 outlets are connected to the small valves connected to the water inlet ends of the N2 water-cooled heat sinks respectively. The water distributor includes N2 inlets and N1 outlets. The N2 inlets are connected to small valves that connect to the water outlets of the N2 water-cooled radiators. The N1 outlets are connected to the return water pipes of the N1 unit compartments.

2. The multi-unit power supply compartment according to claim 1; characterized in that, Each of the unit compartments and the heat dissipation compartments also includes a second booster, which further pressurizes the pressurized gas entering the heat dissipation compartment through the intake pipe.

3. The multi-unit power supply compartment according to claim 2; characterized in that, The second booster is an ejector structure, including an air inlet, an air outlet, and an ejector port; wherein, The air inlet is connected to the air intake pipe in the direction of the engine compartment to introduce the boost gas output from the water-cooled turbocharged engine; The air outlet is connected to the air inlet pipe in the direction of the heat dissipation chamber, which is used to output the pressurized gas after ejection to the heat dissipation chamber. The ejector port is used to introduce high-pressure gas with a pressure higher than that of the boost gas output by the water-cooled turbocharged engine. The second turbocharger uses high-pressure gas introduced through the ejector port to eject the boost gas output from the water-cooled turbocharged engine, further increasing the pressure of the boost gas before outputting it to the heat dissipation chamber.

4. The multi-unit power supply compartment according to claim 1; characterized in that, The air-cooled heat sink assembly includes N3 air-cooled heat sinks, an air inlet distributor, and an air outlet distributor; each air-cooled heat sink has a built-in air pipe; the air-cooled heat sink physically dissipates heat from the air entering the air pipe. Each air-cooled heat sink has a small valve at both ends; the small valves are connected to the air inlet distributor and the air outlet distributor respectively; the small valves are used to control the flow and shut-off of air on the heat sink. The air intake distributor includes N1 air inlets and N3 air outlets. The N1 air inlets are connected to the air intake pipes of N1 unit compartments respectively; the N3 air outlets are connected to the small valves connected to the air inlet ends of N3 air-cooled heat sinks respectively. The exhaust distributor includes N3 air inlets and N1 air outlets. The N3 air inlets are connected to small valves that are connected to the exhaust ends of the N3 air-cooled heat sinks. The N1 air outlets are connected to the return air pipes of the N1 unit compartments.

5. The multi-unit power supply compartment according to claim 1; characterized in that, The cooling fan adopts a multi-fan structure, including N4 groups of fans, each group of fans operates independently and can be stopped and started separately.

6. The multi-unit power supply compartment according to any one of claims 1-5; characterized in that, The water-cooled heat sink assembly, the air-cooled heat sink assembly, and the cooling fan adopt a three-layer arrangement structure; the cooling air blown out by the cooling fan first passes through the air-cooled heat sink assembly, then through the water-cooled heat sink assembly, and then is blown out of the heat dissipation chamber.

7. The multi-unit power supply compartment according to claim 6; characterized in that, The heat dissipation chamber also includes a temperature detection sensor and a fan controller; The temperature detection sensor includes a water temperature sensor group and an air temperature sensor group; Each temperature sensor in the water temperature sensor group is installed in the outlet of the water cooling heat sink group connected to each return water pipe; Each temperature sensor in the air temperature sensor group is located in the air outlet where the air-cooled heat sink group connects to each return air pipe; The fan controller controls the number of fan groups operating in the cooling fan based on the temperature values ​​collected by the water temperature sensor group and the air temperature sensor group. When the collected temperature value of the water outlet is lower than the lower limit of the first water temperature threshold range, and the temperature value of the air outlet is lower than the lower limit of the first air temperature threshold range, the motor in the cooling fan does not work, and heat dissipation is achieved through natural convection between multiple heat sinks and the air. When the collected temperature value of the water outlet is within the first water temperature threshold range or / and when the collected temperature value of the air outlet is within the first air temperature threshold range, the fan controller controls the first group of fans in the cooling fan to work. When the collected temperature value of the water outlet is within the second water temperature threshold range or / and when the collected temperature value of the air outlet is within the second air temperature threshold range, the fan controller controls the second group of fans in the cooling fan to start working. As the water and air temperatures gradually increase, the water temperature and air temperature threshold ranges are determined step by step, and more sets of fans are turned on until the N4th set of fans is working. When the N4 group of fans starts, the heat dissipation capacity of the heat dissipation compartment reaches its maximum, which is suitable for the full-load operation of all units.

8. The multi-unit power supply compartment according to claim 1; characterized in that, Automatic load distribution is achieved by monitoring the output power of the units in the N1 unit cabins; When the output power increases, the second unit will automatically start when it reaches 80% of the rated power of a single unit; the third unit will automatically start when the output power reaches 80% of the sum of the rated power of the two units; and so on until the power supply compartment of the unit is operating at full power. When the output power decreases, the number of working units is reduced accordingly; when reducing the number of working units, control delay and dynamic prediction of output power are performed. If the dynamic prediction result indicates that the decrease in output power is only instantaneous, and the output power will increase again after the control delay time, then the number of output units will not be reduced. When the dynamic prediction result indicates that the output power decreases to a non-instantaneous level, the number of output units is reduced after the control delay time.

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