Diesel generating set heat dissipation system based on indirect evaporative cooling and method thereof

Abstract

The invention discloses a diesel generating set heat dissipation system based on indirect evaporative cooling and a method thereof.The system comprises an indirect evaporative cooler, the indirect evaporative cooler comprises a cross flow part and a reverse flow part, and the cross flow part comprises a dry air channel and a first wet air channel which are crossed and stacked; the air flowing through the dry air channel flows in the second direction, an outlet of the dry air channel faces the diesel generating set, the air flowing through the first wet air channel flows in the first direction, the reverse flow part comprises a second wet air channel and a smoke channel, and the air flowing through the second wet air channel flows in the second direction. Smoke flowing through the smoke channel flows in the second direction and is opposite to the flowing direction of air in the second wet air channel, an inlet of the smoke channel is communicated with a smoke outlet of the diesel generating set, and an outlet of the second wet air channel and an outlet of the smoke channel are both communicated with the external environment. An outlet of the first wet air channel penetrates through the through hole and is communicated with an inlet of the second wet air channel.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of thermal engines, and in particular to a heat dissipation system and method for a diesel generator set based on indirect evaporative cooling. Background Art

[0002] A diesel generator set is a generator that uses diesel as fuel. The diesel engine converts the heat energy generated by the combustion of the fuel into mechanical energy, and then the generator converts the mechanical energy into electrical energy. Diesel generator sets have the advantages of high reliability, quick start-up, and simple maintenance, so they are widely used in many fields. However, the flue gas generated by most diesel generator sets in the prior art is directly discharged into the atmosphere, forming a large amount of thermal pollution and exacerbating the greenhouse effect. Therefore, it is necessary to design a diesel generator set heat dissipation system to cool the flue gas generated by the diesel generator set to avoid environmental pollution and eliminate various safety hazards. Summary of the invention

[0003] The present application provides a heat dissipation system and method for a diesel generator set based on indirect evaporative cooling, which utilizes indirect evaporative cooling technology to generate dry cold airflow and wet cold airflow. The dry cold airflow achieves a heat dissipation effect through forced convection heat exchange, and the wet cold airflow performs secondary heat exchange with the flue gas to reduce the final exhaust temperature, thereby ensuring the safe and stable operation of the diesel engine and greatly eliminating exhaust heat pollution.

[0004] The specific technical solutions are as follows:

[0005] In a first aspect, an embodiment of the present application provides a heat dissipation system for a diesel generator set based on indirect evaporative cooling, comprising:

[0006] A middle outer cover, in which the diesel generator set is arranged,

[0007] The bottom outer cover is arranged on the outer end surface of the middle outer cover close to the diesel generator set in the first direction, and the bottom outer cover is provided with a through hole connected to the middle outer cover,

[0008] An indirect evaporative cooler, the indirect evaporative cooler comprises a cross-flow part and a counter-flow part, the cross-flow part is arranged in the middle outer cover, the counter-flow part is arranged in the bottom outer cover, the cross-flow part comprises a dry air channel and a first wet air channel which are cross-stacked with each other, the air flowing through the dry air channel flows along the second direction, the outlet of the dry air channel faces the diesel generator set, the air flowing through the first wet air channel flows along the first direction, the counter-flow part comprises a second wet air channel and a smoke channel which are cross-stacked with each other, the air flowing through the second wet air channel flows along the second direction, the smoke flowing through the smoke channel flows along the second direction, and is opposite to the flow direction of the air in the second wet air channel, the inlet of the smoke channel is connected to the smoke exhaust port of the diesel generator set, the outlet of the second wet air channel and the outlet of the smoke channel are both connected to the external environment, the outlet of the first wet air channel is connected to the inlet of the second wet air channel through the through hole,

[0009] A lateral drainage structure, which is arranged on the middle outer cover and is used to guide the air in the external environment to the inlet of the dry air channel,

[0010] A longitudinal drainage structure, which is arranged on the middle outer cover and is used to guide the air in the external environment to the entrance of the first humid air channel,

[0011] a plurality of nozzles, wherein the plurality of nozzles are arranged at the entrance of the first wet air passage;

[0012] A water tank is disposed on the middle outer cover and is connected to the plurality of nozzles through a water pump.

[0013] The second direction is perpendicular to the first direction.

[0014] In some embodiments of the present application, the diesel generator set includes a diesel engine, an electronic control system and a radiator. In the second direction, the electronic control system, the diesel engine and the radiator are arranged in sequence in a direction away from the cross flow part, and a flow hole is provided on the end face of the middle outer cover close to the radiator.

[0015] In some embodiments of the present application, the orthographic projection of the diesel generator set in the first direction is located in the area where the countercurrent part is located.

[0016] In some embodiments of the present application, the water tank includes a first vertical part, a second vertical part, and a horizontal part connecting the first vertical part and the second vertical part, the horizontal part is arranged on the outer end surface of the middle outer cover in the first direction away from the diesel generator set, the first vertical part and the second vertical part are arranged on the two opposite outer end surfaces of the middle outer cover in the third direction, and the first vertical part, the second vertical part and the horizontal part are all tightly fitted with the outer end surface of the middle outer cover, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

[0017] In some embodiments of the present application, the orthographic projection of one end of the diesel engine close to the water tank in the third direction is located within the orthographic projection of the first vertical part in the third direction, and / or is located within the orthographic projection of the second vertical part in the third direction.

[0018] In some embodiments of the present application, a smoke diverter and a smoke collector are also included. The middle outer cover is provided with a flow hole on the end face close to the diesel generator set in the second direction. The smoke diverter is arranged on the outer side of the middle outer cover and is located at the flow hole. The inlet of the smoke diverter is connected with the smoke exhaust port of the diesel generator set, and the outlet of the smoke diverter is connected with the inlet of the smoke collector. The smoke collector is arranged on the outer end face of the bottom outer cover, and the outlet of the smoke collector is connected with the inlet of the smoke channel, and the shape and size of the outlet of the smoke collector match the shape and size of the inlet of the smoke channel.

[0019] In some embodiments of the present application, the lateral air flow guidance structure includes a lateral fan and an air guide cover, the air guide cover is arranged on the outer end surface of the middle outer cover close to the cross flow part in the second direction, the lateral fan is arranged on the outer side of the middle outer cover, and the air outlet of the lateral fan is connected with the air inlet of the air guide cover, the air outlet of the air guide cover is connected with the inlet of the dry air channel, and the shape and size of the air outlet of the air guide cover matches the shape and size of the inlet of the dry air channel.

[0020] In some embodiments of the present application, the longitudinal drainage structure includes a longitudinal fan and a top outer cover, the top outer cover is arranged on the outer end surface of the middle outer cover away from the bottom outer cover in the first direction, and is located at the entrance of the first wet air channel, the interior of the top outer cover is connected with the entrance of the first wet air channel, one or more longitudinal fans are arranged on the outer end surface of the top outer cover away from the middle outer cover in the first direction, the air outlet of the longitudinal fan is connected with the interior of the top outer cover and faces the entrance of the first wet air channel, and a plurality of nozzles are arranged in the top outer cover.

[0021] In some embodiments of the present application, a support base is further included. In the second direction, the support base is arranged on the outer end surface of the bottom outer cover away from the middle outer cover.

[0022] In a second aspect, an embodiment of the present application provides a heat dissipation method for a diesel generator set based on indirect evaporative cooling, which is applied to the heat dissipation system for a diesel generator set based on indirect evaporative cooling described in the first aspect. The heat dissipation method for a diesel generator set includes:

[0023] The diesel engine is cooled by the coolant in the cylinder during operation, and the radiator dissipates heat from the heated coolant;

[0024] External water supply is injected into a water tank covered on the outer end surface of the middle outer cover, and the water tank absorbs the heat radiation of the hot surface of the diesel engine. At the same time, the water tank delivers water supply to multiple nozzles in the top outer cover through a water pump, and the water supply is sprayed into the first wet air channel through the nozzles, and forms a water film flowing from top to bottom on the inner wall surface of the first wet air channel by gravity;

[0025] The external incoming air introduced by the transverse fan enters the dry air channel through the air guide cover, and is cooled after transferring heat to the water film attached to the inner wall surface of the first wet air channel in the dry air channel. The cooled external incoming air flows out from the outlet of the dry air channel and sweeps the hot surface of the diesel engine. After that, a part of the airflow is absorbed by the diesel engine for combustion and work, and is converted into flue gas. The flue gas passes through the flue gas diverter and the flue gas collector in sequence and evenly enters the flue gas channel, releasing heat to the wet and cold airflow in the second wet air channel, and then is discharged to the external environment through the outlet of the flue gas channel. Another part of the airflow is sucked into the radiator to dissipate the heat of the heated coolant, and then sweeps the surface of the flue gas diverter to cool the flue gas in the flue gas diverter and discharge it to the external environment.

[0026] The external air flow introduced by the longitudinal fan enters the first wet air channel through the top outer cover, and undergoes heat and mass transfer with the water film attached to the inner wall surface of the first wet air channel to be cooled and humidified to form a wet and cold airflow. The wet and cold airflow flows from the outlet of the first wet air channel into the second wet air channel, and flows in the opposite direction to the smoke in the smoke channel to cool the smoke, and then is discharged to the external environment through the outlet of the second wet air channel.

[0027] The beneficial effects of the embodiments of the present application are as follows:

[0028] The present invention is different from the direct exhaust mode of high-temperature flue gas of traditional diesel generator sets. It adopts indirect evaporative cooling technology to form dry cold airflow and wet cold airflow at the same time, and makes full use of these two airflows to form a highly integrated whole-machine heat dissipation solution. Among them, the dry cold airflow can not only reduce the surface temperature of the diesel generator set through forced convection, but also enhance the heat dissipation effect of the diesel generator set radiator, and further cool the exhaust gas of the diesel generator set; the wet cold airflow can also further reduce the exhaust gas temperature of the diesel generator set through efficient heat exchange similar to that of a plate heat exchanger. In addition, the use of a water tank to cover the diesel engine not only solves the water supply problem, but also forms a low-temperature shield for the hot surface of the diesel generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of a heat dissipation system for a diesel generator set based on indirect evaporative cooling provided in an embodiment of the present application;

[0031] Figure 2 Four views of a heat dissipation system of a diesel generator set based on indirect evaporative cooling provided in an embodiment of the present application, wherein (a) is a front view, (b) is a top view, (c) is a left view, and (d) is a right view;

[0032] Figure 3 A schematic structural diagram of an indirect evaporative cooler in a heat dissipation system of a diesel generator set based on indirect evaporative cooling provided in an embodiment of the present application;

[0033] Figure 4Four views of an indirect evaporative cooler in a diesel generator set cooling system based on indirect evaporative cooling provided in an embodiment of the present application, wherein (a) is a top view, (b) is a bottom view, (c) is a left view, and (d) is a right view. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The terms "including" and "having" in the embodiments of the present application and the accompanying drawings and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0036] The embodiment of the present application discloses a heat dissipation system for a diesel generator set based on indirect evaporative cooling, which is described in detail below.

[0037] Figure 1 A heat dissipation system for a diesel generator set based on indirect evaporative cooling is shown according to an embodiment of the present application. Figure 1 As shown, the heat dissipation system of the diesel generator set mainly includes: a middle outer cover 1, a bottom outer cover 3, an indirect evaporative cooler 4, a transverse drainage structure 5, a longitudinal drainage structure 6, a plurality of nozzles 71 and a water tank 72. The middle outer cover 1 and the bottom outer cover 3 are the main outer cover structures of the heat dissipation system of the diesel generator set, which are used to provide a placement position for other components and play a role in protecting the shell. The indirect evaporative cooler 4 is placed in the middle outer cover 1 and the bottom outer cover 3, and with the assistance of the transverse drainage structure 5, the longitudinal drainage structure 6, the plurality of nozzles 71 and the water tank 72, it generates dry cold airflow and wet cold airflow, performs secondary heat exchange on the flue gas generated by the diesel generator set 2, and achieves the purpose of reducing the final exhaust temperature.

[0038] Specifically, Figure 1As shown, in the first direction, the bottom outer cover 3 is arranged on the outer end surface of the middle outer cover 1 close to the diesel generator set 2, that is, the middle outer cover 1 and the bottom outer cover 3 are stacked in sequence from top to bottom along the first direction, the diesel generator set 2 is arranged at one end in the inner cavity of the middle outer cover 1, and the bottom outer cover 3 is provided with a through hole 31 connected to the middle outer cover 1 to facilitate the installation of the indirect evaporative cooler 4 in the middle outer cover 1 and the bottom outer cover 3. The through hole 31 is located at the other end in the inner cavity of the middle outer cover 1 to avoid interference between the installation of the diesel generator set 2 and the installation of the indirect evaporative cooler 4.

[0039] In the present application, the first direction, the second direction and the third direction are mutually perpendicular. For example, the middle outer cover is a rectangular parallelepiped structure, such as Figure 1 As shown, the first direction refers to the direction of the long side of the middle outer cover 1, the second direction refers to the direction of the height of the middle outer cover 1, and the third direction refers to the direction of the wide side of the middle outer cover 1. However, it should be noted and understood that the vertical in this application is not absolutely vertical, and can be 90°±10°.

[0040] In the embodiments of the present application, Figure 1 , Figure 3 and Figure 4As shown, the indirect evaporative cooler 4 includes a cross-flow portion 41 and a counter-flow portion 42 which are vertically connected to each other, the cross-flow portion 41 is arranged in the middle outer cover 1, and the counter-flow portion 42 is arranged in the bottom outer cover 3. The cross-flow portion 41 includes a dry air channel 411 and a first wet air channel 412 which are cross-stacked with each other, a first wet air channel 412 is arranged between every two dry air channels 411, and similarly, a dry air channel 411 is arranged between every two first wet air channels 412, and the airflow directions in the dry air channel 411 and the first wet air channel 412 are perpendicular to each other, the air flowing through the dry air channel 411 flows in the second direction, and the outlet of the dry air channel 411 faces the diesel generator set 2, and the air flowing through the first wet air channel 412 flows in the first direction. The countercurrent portion 42 includes a second moist air channel (not shown in the figure) and a smoke channel 422 which are cross-stacked. Similarly, a smoke channel 422 is set between each second moist air channel, and a second moist air channel is set between each second smoke channel 422. The airflow directions in the second moist air channel and the smoke channel 422 are parallel and opposite to each other. The air flowing through the second moist air channel flows in the second direction, and the smoke flowing through the smoke channel 422 flows in the second direction, which is opposite to the flow direction of the air in the second moist air channel. The direction of the smoke channel 422 is opposite to that of the air in the second moist air channel. The inlet is connected with the smoke exhaust port of the diesel generator set 2 so that the smoke generated by the diesel generator set 2 can be drained into the smoke channel 422. The outlet 4211 of the second wet air channel and the outlet 4221 of the smoke channel 422 are both connected with the external environment so that the wet air and the smoke after cooling treatment can be discharged into the external environment. The outlet of the first wet air channel 412 is penetrated by a through hole 31 and is connected with the inlet of the second wet air channel so that the wet and cold airflow formed in the first wet air channel 412 can enter the second wet air channel, thereby absorbing heat and cooling the smoke.

[0041] The lateral drainage structure serves as a drainage mechanism for the heat dissipation system of the diesel generator set in the second direction, such as Figure 1 , Figure 3 and Figure 4 As shown, the transverse flow guiding structure 5 is arranged on the middle outer cover 1, and is used to guide the air in the external environment to the inlet of the dry air channel 411. In a specific embodiment, the transverse flow guiding structure 5 includes a transverse fan 51 and a guide cover 52, wherein the guide cover 52 is arranged on the outer end surface of the middle outer cover 1 close to the cross flow part 41 in the second direction, the transverse fan 51 is arranged on the outside of the middle outer cover 1, and the air outlet of the transverse fan 51 is connected to the air inlet of the guide cover 52, and the air outlet of the guide cover 52 is connected to the inlet of the dry air channel 411. Further, the shape and size of the air outlet of the guide cover 52 match the shape and size of the inlet of the dry air channel 411 to ensure that the multi-channel flow of the dry air channel 411 is uniform.

[0042] The longitudinal drainage structure serves as a drainage mechanism of the heat dissipation system of the diesel generator set in the first direction, such as Figure 1 , Figure 3 and Figure 4 As shown, the longitudinal drainage structure 6 is arranged on the middle outer cover 1, and is used to guide the air in the external environment to the entrance of the first moist air channel 412. In a specific embodiment, the longitudinal drainage structure 6 includes a longitudinal fan 61 and a top outer cover 62, wherein the top outer cover 62 is arranged on the outer end surface of the middle outer cover 1 away from the bottom outer cover 3 in the first direction, and is located at the entrance of the first moist air channel 412, the interior of the top outer cover 62 is connected to the entrance of the first moist air channel 412, and one or more longitudinal fans 61 are arranged on the outer end surface of the top outer cover 62 away from the middle outer cover 1 in the first direction, and the air outlet of the longitudinal fan 61 is connected to the interior of the top outer cover 62 and faces the entrance of the first moist air channel 412. Further, the shape and size of the connecting hole between the top outer cover 62 and the middle outer cover 1 are the same as the shape and size of the entrance of the first moist air channel 412, so as to ensure that the multi-channel flow of the first moist air channel 412 is uniform.

[0043] Multiple nozzles, water tanks and water pumps constitute the air humidification mechanism of the diesel generator set cooling system, which humidifies the air in the first wet air channel and plays a role in cooling. Figure 1 As shown, a plurality of nozzles 71 are disposed at the entrance of the first moist air passage 412. Specifically, the plurality of nozzles 71 are disposed in the top outer cover 62 and face the entrance of the first moist air passage 412. A water tank 72 is disposed on the middle outer cover 1 and is connected to the plurality of nozzles 71 through a water pump 73 to supply water to the nozzles 71.

[0044] In the embodiments of the present application, Figure 1As shown, the diesel generator set 2 includes a diesel engine 21, an electronic control system 22 and a radiator 23. In the second direction, the electronic control system 22, the diesel engine 21 and the radiator 23 are arranged in sequence along the direction away from the cross flow part 41. During operation, the diesel engine 21 relies on the electronic control system 22 to output electricity to the outside, and relies on the radiator 23 to dissipate the coolant used to cool the cylinder body of the diesel engine 21. Further, a flow hole 31 is arranged on the end surface of the middle outer cover 1 close to the radiator 23 to ensure smooth circulation of air in the middle outer cover 1 and achieve efficient heat dissipation of the diesel generator set 2. In some specific embodiments, the orthographic projection of the diesel generator set 2 in the first direction is located in the area where the counterflow part 42 is located. On the one hand, the overall structure of the heat dissipation system of the diesel generator set can be compact and occupy a small space. On the other hand, the diesel generator set 2 is arranged above the counterflow part 42, which can ensure that the temperature below the diesel generator set 2 is always in a relatively low range, avoiding the temperature below the diesel generator set 2 from rising due to the operation of the diesel generator set 2, and providing a good environment for the operation of the diesel generator set 2. In some other specific embodiments, the diesel generator set 2 may also be directly disposed on the countercurrent portion 42 .

[0045] In some embodiments, Figure 1 and Figure 2 As shown, the water tank 72 includes a first vertical portion 721, a second vertical portion 722, and a horizontal portion 723 connecting the first vertical portion 721 and the second vertical portion 722. The first vertical portion 721, the horizontal portion 723, and the second vertical portion 722 form a U-shaped water tank. The horizontal portion 723 is arranged on the outer end surface of the middle outer cover 1 away from the diesel generator set 2 in the first direction, and the first vertical portion 721 and the second vertical portion 722 are arranged on the two opposite outer end surfaces of the middle outer cover 1 in the third direction, and the first vertical portion 721, the second vertical portion 722, and the horizontal portion 723 are all closely attached to the outer end surface of the middle outer cover 1, so that heat conduction can be carried out between the water tank 72 and the shell of the middle outer cover 1, thereby reducing the temperature inside the middle outer cover 1. Furthermore, in a specific implementation process, the orthographic projection of one end of the diesel engine 21 close to the water tank 72 in the third direction is located within the orthographic projection of the first vertical portion 721 in the third direction, and / or is located within the orthographic projection of the second vertical portion 722 in the third direction. The shape and size of the water tank 72 are adapted to the shape and size of the diesel engine 21, and the water tank 72 is arranged directly above the placement position of the diesel engine 21. The heat radiation from the hot surface of the diesel engine 21 can be effectively absorbed while the overall structure of the water tank 72 is as small as possible, thereby avoiding overheating of the local temperature of the middle outer cover 1.

[0046] In other embodiments, Figure 1As shown, the heat dissipation system of the diesel generator set also includes a flue gas splitter 81 and a flue gas collector 82. Among them, the smoke diverter 81 is arranged on the outside of the middle outer cover 1 and is located at the flow hole 31. The inlet of the smoke diverter 81 is connected with the exhaust port of the diesel generator set 2, so that the airflow discharged through the middle outer cover 1 (mainly referring to the exhaust of the radiator 23) cools the smoke in the smoke diverter 81. The outlet of the smoke diverter 81 is connected with the inlet of the smoke collector 82. The smoke collector 82 is arranged on the outer end surface of the bottom outer cover 3. The outlet of the smoke collector 82 is connected with the inlet of the smoke channel 422, and the shape and size of the outlet of the smoke collector 82 match the shape and size of the inlet of the smoke channel 422. Therefore, through the smoke diversion effect of the smoke diverter 81 and the smoke collector 82, the smoke generated by the diesel generator set 2 flows evenly into each channel of the smoke channel 422, ensuring that the multi-channel flow of the smoke channel 422 is uniform, thereby ensuring that the smoke in the smoke channel 422 can be efficiently cooled.

[0047] In addition, in the embodiments of the present application, Figure 1 , Figure 3 and Figure 4 As shown, the heat dissipation system of the diesel generator set also includes a support base 9. In the second direction, the support base 9 is arranged on the outer end surface of the bottom outer cover 3 away from the middle outer cover 1, that is, the middle outer cover 1, the bottom outer cover 3, and the support base 9 are stacked in sequence from top to bottom along the first direction. The outlet 4211 of the second wet air channel and the outlet 4221 of the smoke channel 422 are both arranged toward the support base 9. The outlet 4211 of the second wet air channel is located at one end close to the entrance of the smoke channel 422, and the outlet of the smoke channel 422 is located at one end close to the entrance of the second wet air channel. Through the arrangement of the support base 9, the outlet 4211 of the second wet air channel and the outlet 4221 of the smoke channel 422 are at a certain distance from the horizontal ground, thereby ensuring the smooth discharge of the airflow in the second wet air channel and the smoke in the smoke channel 422, thereby ensuring the circulation of the overall airflow and ensuring the overall heat dissipation effect of the heat dissipation system of the diesel generator set.

[0048] The above is an introduction to the various components of the diesel generator set heat dissipation system based on indirect evaporative cooling provided by this embodiment and the connection relationship between them. Figure 1 – Figure 4 , the working principle of the cooling system of the diesel generator set is described in detail.

[0049] In this embodiment, the water tank 72 can be replenished by external water supply. On the one hand, the water tank 72 covered on the outer end surface of the middle outer cover 1 can absorb the heat radiation of the hot surface during the operation of the diesel engine 21. On the other hand, the water tank 72 supplies the required water source to the multiple nozzles 71 in the top outer cover 62, and the water supply therein is transported to the multiple nozzles 71 through the water pump 73. The water supply is sprayed out through the nozzles 71 and enters the first wet air channel 412. Under the action of water gravity, the water supply forms a water film flowing from top to bottom on the inner wall surface of the first wet air channel 412.

[0050] The air inlet of the transverse fan 51 is connected to the external environment. The external air flows into the air guide 52 under the action of the transverse fan 51, and evenly enters each channel of the dry air channel 411 under the guiding action of the air guide 52. Since a first wet air channel 412 is provided on both sides of each channel of the dry air channel 411, the external air can transfer heat to the water film attached to the inner wall surface of the first wet air channel 412 in the dry air channel 411 to achieve self-cooling. The cooled external air flows out from the outlet of the dry air channel 411, and flows through the electronic control system 22, the diesel engine 21 and the radiator 23 in sequence. Among them, the cooled external air sweeps the hot surface of the diesel engine 21, which can reduce the surface temperature of the diesel engine 21, achieve cooling of the diesel engine 21, and ensure that the diesel engine 21 has a good working environment. The external air flow after sweeping the hot surface of the diesel engine 21 is mainly divided into two parts. One part of the air flow is sucked into the radiator 23 to enhance the heat dissipation of the heated coolant, and then sweeps the surface of the flue gas diverter 81 again in a strong convection manner, thereby cooling the flue gas in the flue gas diverter 81, completing the first cooling of the flue gas, and the air flow after the flue gas is cooled is discharged to the external environment; the other part of the air flow is absorbed by the diesel engine 21, and is converted into flue gas (i.e., the flue gas generated by the diesel generator set 2) after combustion. The flue gas passes through the flue gas diverter 81 and the flue gas collector 82 in turn. The smoke enters each channel of the smoke channel 422 evenly. Since a second wet air channel is provided on both sides of each channel of the smoke channel 422, the smoke in the smoke channel 422 can release heat to the wet and cold airflow in the second wet air channel, thereby realizing a second cooling of the smoke. The smoke after cooling is discharged to the external environment through the outlet of the smoke channel 422. The heat dissipation system of the diesel generator set performs secondary cooling of the smoke emitted by the diesel engine 21, which can effectively avoid environmental pollution and eliminate various safety hazards, meets the national strategic requirements of energy conservation, emission reduction and sustainable development, and has important application value.

[0051] In addition, the air inlet of the longitudinal fan 61 is also connected to the outside environment. Under the action of the longitudinal fan 61, the outside air flows into the first wet air channel 412 through the top outer cover 62, and heat and mass transfer occurs with the water film attached to the inner wall surface of the first wet air channel 412, thereby cooling and humidifying the outside air, forming a wet and cold airflow. The wet and cold airflow flows from the outlet of the first wet air channel 412 into the second wet air channel. Since it is parallel and opposite to the flue gas in the flue gas channel 422, it can cool down all the flue gas flowing through the flue gas channel 422. The wet and cold airflow absorbs the heat of the flue gas and heats up, and is discharged to the outside environment through the outlet of the second wet air channel. Among them, the use of wet and cold air to cool the flue gas not only causes heat transfer between the two, but also has a mass transfer process, so that the discharged flue gas can be effectively cooled to ensure that no thermal pollution is caused.

[0052] An embodiment of the present application also discloses a heat dissipation method for a diesel generator set based on indirect evaporative cooling, which is applied to the heat dissipation system for a diesel generator set based on indirect evaporative cooling in the aforementioned embodiment. The specific structure and working principle of the heat dissipation system for a diesel generator set can be found in the aforementioned embodiment of the heat dissipation system for a diesel generator set based on indirect evaporative cooling, which will not be repeated here.

[0053] The heat dissipation method of the diesel generator set specifically includes:

[0054] During operation, the diesel engine is cooled by the coolant in the cylinder, and the radiator dissipates the heat from the heated coolant;

[0055] The external water supply is injected into the water tank covered on the outer end surface of the middle outer cover. The water tank absorbs the heat radiation from the hot surface of the diesel engine. At the same time, the water tank delivers the water supply to the multiple nozzles in the top outer cover through the water pump. The water supply is sprayed into the first wet air channel through the nozzles and forms a water film flowing from top to bottom on the inner wall surface of the first wet air channel by gravity.

[0056] The external air flow introduced by the transverse fan enters the dry air channel through the air guide cover, and is cooled after heat transfer to the water film attached to the inner wall surface of the first wet air channel in the dry air channel. The cooled external air flow flows out from the outlet of the dry air channel and sweeps the hot surface of the diesel engine. After that, a part of the air flow is absorbed by the diesel engine for combustion and work, and is converted into flue gas. The flue gas passes through the flue gas diverter and the flue gas collector in turn and evenly enters the flue gas channel, releasing heat to the wet and cold air flow in the second wet air channel, and then is discharged to the external environment through the outlet of the flue gas channel. Another part of the air flow is sucked into the radiator to dissipate the heat of the heated coolant, and then sweeps the surface of the flue gas diverter to cool the flue gas in the flue gas diverter and discharge it to the external environment.

[0057] The external air flow introduced by the longitudinal fan enters the first wet air channel through the top outer cover, and undergoes heat and mass transfer with the water film attached to the inner wall surface of the first wet air channel to be cooled and humidified to form a wet and cold airflow. The wet and cold airflow flows from the outlet of the first wet air channel into the second wet air channel, and flows in the opposite direction to the smoke in the smoke channel to cool the smoke, and then is discharged to the external environment through the outlet of the second wet air channel.

[0058] In summary, the diesel generator set heat dissipation system and method based on indirect evaporative cooling provided in the embodiments of the present application utilize indirect evaporative cooling technology to perform efficient heat exchange treatment on the high-temperature exhaust gas of the diesel generator set without substantially increasing energy consumption. At the same time, thermal protection measures such as air-cooling sweeping and water-cooling shielding are performed on the hot surface of the diesel generator set, thereby forming an integrated heat dissipation solution for the whole machine, ensuring the safe and stable operation of the diesel generator set and achieving low-temperature emission of flue gas.

[0059] Those skilled in the art will understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. In addition, the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be changed accordingly and located in one or more devices different from the present embodiments. The modules in the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

[0060] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In addition, in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. It should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0061] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A diesel generator heat dissipation system based on indirect evaporative cooling, characterized in that: include: A middle outer cover, in which the diesel generator set is arranged, The bottom outer cover is arranged on the outer end surface of the middle outer cover close to the diesel generator set in the first direction, and the bottom outer cover is provided with a through hole connected to the middle outer cover, An indirect evaporative cooler, the indirect evaporative cooler comprises a cross-flow part and a counter-flow part, the cross-flow part is arranged in the middle outer cover, the counter-flow part is arranged in the bottom outer cover, the cross-flow part comprises a dry air channel and a first wet air channel which are cross-stacked with each other, the air flowing through the dry air channel flows along the second direction, the outlet of the dry air channel faces the diesel generator set, the air flowing through the first wet air channel flows along the first direction, the counter-flow part comprises a second wet air channel and a smoke channel which are cross-stacked with each other, the air flowing through the second wet air channel flows along the second direction, the smoke flowing through the smoke channel flows along the second direction, and is opposite to the flow direction of the air in the second wet air channel, the inlet of the smoke channel is connected to the smoke exhaust port of the diesel generator set, the outlet of the second wet air channel and the outlet of the smoke channel are both connected to the external environment, the outlet of the first wet air channel is connected to the inlet of the second wet air channel through the through hole, A lateral drainage structure, which is arranged on the middle outer cover and is used to guide the air in the external environment to the inlet of the dry air channel, A longitudinal drainage structure, which is arranged on the middle outer cover and is used to guide the air in the external environment to the entrance of the first humid air channel, a plurality of nozzles, wherein the plurality of nozzles are arranged at the entrance of the first wet air passage; A water tank is disposed on the middle outer cover and is connected to the plurality of nozzles through a water pump. The second direction is perpendicular to the first direction.

2. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 1, characterized in that: The diesel generator set includes a diesel engine, an electronic control system and a radiator. In the second direction, the electronic control system, the diesel engine and the radiator are arranged in sequence in a direction away from the cross flow part, and a flow hole is arranged on the end face of the middle outer cover close to the radiator.

3. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 2, characterized in that: The orthographic projection of the diesel generator set in the first direction is located in the area where the countercurrent part is located.

4. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 2, characterized in that: The water tank includes a first vertical portion, a second vertical portion, and a horizontal portion connecting the first vertical portion and the second vertical portion, the horizontal portion is arranged on the outer end surface of the middle outer cover in the first direction away from the diesel generator set, the first vertical portion and the second vertical portion are arranged on two opposite outer end surfaces of the middle outer cover in a third direction, and the first vertical portion, the second vertical portion and the horizontal portion are all tightly fitted with the outer end surface of the middle outer cover, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

5. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 4, characterized in that: The orthographic projection of one end of the diesel engine close to the water tank in the third direction is located within the orthographic projection of the first vertical part in the third direction and / or is located within the orthographic projection of the second vertical part in the third direction.

6. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 1, characterized in that: It also includes a smoke diverter and a smoke collector. The middle outer cover is provided with a flow hole on the end face close to the diesel generator set in the second direction. The smoke diverter is arranged on the outer side of the middle outer cover and is located at the flow hole. The inlet of the smoke diverter is connected with the smoke exhaust port of the diesel generator set, and the outlet of the smoke diverter is connected with the inlet of the smoke collector. The smoke collector is arranged on the outer end face of the bottom outer cover, and the outlet of the smoke collector is connected with the inlet of the smoke channel, and the shape and size of the outlet of the smoke collector match the shape and size of the inlet of the smoke channel.

7. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 1, characterized in that: The lateral air flow guidance structure includes a lateral fan and an air guide cover. The air guide cover is arranged on the outer end surface of the middle outer cover close to the cross flow part in the second direction. The lateral fan is arranged on the outer side of the middle outer cover, and the air outlet of the lateral fan is connected with the air inlet of the air guide cover. The air outlet of the air guide cover is connected with the inlet of the dry air channel, and the shape and size of the air outlet of the air guide cover matches the shape and size of the inlet of the dry air channel.

8. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 1, characterized in that: The longitudinal drainage structure includes a longitudinal fan and a top outer cover, the top outer cover is arranged on the outer end surface of the middle outer cover away from the bottom outer cover in the first direction, and is located at the entrance of the first wet air channel, the interior of the top outer cover is connected with the entrance of the first wet air channel, one or more longitudinal fans are arranged on the outer end surface of the top outer cover away from the middle outer cover in the first direction, the air outlet of the longitudinal fan is connected with the interior of the top outer cover and faces the entrance of the first wet air channel, and a plurality of nozzles are arranged in the top outer cover.

9. The heat dissipation system of a diesel generator set based on indirect evaporative cooling according to claim 1, characterized in that: It also includes a support base, and in the second direction, the support base is arranged on the outer end surface of the bottom outer cover away from the middle outer cover.

10. A method for heat dissipation of a diesel generator set based on indirect evaporative cooling, characterized in that: The heat dissipation system of a diesel generator set based on indirect evaporative cooling as described in any one of claims 1 to 9, wherein the heat dissipation method of the diesel generator set comprises: The diesel engine is cooled by the coolant in the cylinder during operation, and the radiator dissipates heat from the heated coolant; External water supply is injected into a water tank covered on the outer end surface of the middle outer cover, and the water tank absorbs the heat radiation of the hot surface of the diesel engine. At the same time, the water tank delivers water supply to multiple nozzles in the top outer cover through a water pump, and the water supply is sprayed into the first wet air channel through the nozzles, and forms a water film flowing from top to bottom on the inner wall surface of the first wet air channel by gravity; The external incoming air introduced by the transverse fan enters the dry air channel through the air guide cover, and is cooled after transferring heat to the water film attached to the inner wall surface of the first wet air channel in the dry air channel. The cooled external incoming air flows out from the outlet of the dry air channel and sweeps the hot surface of the diesel engine. After that, a part of the airflow is absorbed by the diesel engine for combustion and work, and is converted into flue gas. The flue gas passes through the flue gas diverter and the flue gas collector in sequence and evenly enters the flue gas channel, releasing heat to the wet and cold airflow in the second wet air channel, and then is discharged to the external environment through the outlet of the flue gas channel. Another part of the airflow is sucked into the radiator to dissipate the heat of the heated coolant, and then sweeps the surface of the flue gas diverter to cool the flue gas in the flue gas diverter and discharge it to the external environment. The external air flow introduced by the longitudinal fan enters the first wet air channel through the top outer cover, and undergoes heat and mass transfer with the water film attached to the inner wall surface of the first wet air channel to be cooled and humidified to form a wet and cold airflow. The wet and cold airflow flows from the outlet of the first wet air channel into the second wet air channel, and flows in the opposite direction to the smoke in the smoke channel to cool the smoke, and then is discharged to the external environment through the outlet of the second wet air channel.

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