Generator set with heat recovery system

Abstract

The utility model discloses a generator set with a heat recovery system, comprising an engine heat recovery system comprising a first circulating pump, a first heat energy power generation assembly and a first power supply converter, the first circulating pump and the first heat energy power generation assembly are connected in series through a pipeline, and the first heat energy power generation assembly is electrically connected with the first power supply converter; the exhaust smoke heat recovery system comprises a heat recoverer, a second circulating pump, a second heat energy power generation assembly and a second power converter, the heat recoverer is connected to a smoke exhaust port of the engine, smoke is exhausted through the heat recoverer, and a cooling liquid flow path is arranged on the heat recoverer; the second circulating pump and the second heat energy power generation assembly are connected with the cooling liquid flow path through pipelines to form a circulating loop, and the second heat energy power generation assembly is electrically connected with the second power converter. According to the utility model, a plurality of heat recovery systems are arranged to recover heat generated at different positions of the unit, and the recovered heat is utilized to generate power, so that the recovery amount of waste heat is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of engine heat recovery, and more specifically, to an engine heat recovery system and a generator set. Background Art

[0002] As the world economy enters the "Industry 4.0" development stage, my country strives to peak its carbon dioxide emissions before 2030 and achieve the goal of carbon neutrality before 2060. Therefore, energy conservation and emission reduction and promoting green economic transformation are the most effective ways.

[0003] Currently, a huge amount of waste heat is wasted during engine operation. About 30% of the energy released after fuel combustion is discharged by the cooling system, and about 40% is discharged by the exhaust. About 70% of the energy of these two parts is transferred to the surrounding environment in the form of waste heat, without forming effective work, resulting in a huge waste of energy. In addition, in low temperature environments, diesel generator sets also need to be equipped with low-temperature heating starting devices, which also increases the cost of the generator sets. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention innovatively provides a generator set with a heat recovery system, which can solve the technical problem of low engine heat recovery rate in the prior art.

[0005] To achieve the above technical objectives, the present invention discloses a generator set with a heat recovery system, comprising an engine and a generator, and further comprising:

[0006] An engine heat recovery system includes a first circulation pump, a first thermal power generation component, and a first power converter, wherein the first circulation pump and the first thermal power generation component are connected in series to a coolant circulation loop of the engine via a pipeline, and the first thermal power generation component is electrically connected to the first power converter;

[0007] The exhaust heat recovery system includes a heat recovery device, a second circulation pump, a second thermal power generation component and a second power converter. The heat recovery device is connected to the exhaust port of the engine and exhausts smoke through the heat recovery device.

[0008] The heat recovery device is provided with a coolant flow path, the second circulation pump and the second thermal energy power generation component are connected to the coolant flow path through a pipeline to form a circulation loop, and the second thermal energy power generation component is electrically connected to the second power converter.

[0009] Furthermore, the heat recovery device includes an inner shell, an outer shell and a smoke exhaust pipe, the inner shell is arranged in the outer shell, the coolant flow path is formed between the outer shell and the inner shell, the interior of the inner shell forms a smoke exhaust channel, and the smoke exhaust pipe is connected to the inner shell and communicates with the smoke exhaust channel.

[0010] Furthermore, a plurality of partitions are provided in the smoke exhaust channel, and the plurality of partitions divide the smoke exhaust channel into a plurality of independent channels.

[0011] Furthermore, a bottom plate is provided in the smoke exhaust passage, the bottom plate is arranged perpendicular to the axis of the smoke exhaust passage, and a plurality of smoke exhaust holes are formed on the bottom plate.

[0012] Furthermore, it also includes a generator heat recovery system, which includes: a third circulation pump, a third thermal energy power generation component and a third power converter. The third circulation pump and the third thermal energy power generation component are connected in series to the coolant circulation loop of the engine through pipelines, and the third thermal energy power generation component is electrically connected to the third power converter.

[0013] Furthermore, output ends of the first power converter, the second power converter and the third power converter are connected to the same power output port.

[0014] Furthermore, the first power converter is a bidirectional DA / AC converter.

[0015] Furthermore, the first thermal power generation assembly, the second thermal power generation assembly, and the third thermal power generation assembly have the same structure and all include:

[0016] A heat exchanger, a pipe joint, and a semiconductor integrated component. The heat exchanger has multiple heat exchange cavities formed inside. The multiple heat exchange cavities are connected in series to form a flow pipe.

[0017] The semiconductor integrated component is attached to the outer wall of the heat exchanger.

[0018] Furthermore, a plurality of heat exchange fins are provided on the semiconductor integrated component.

[0019] Furthermore, the semiconductor integration component is a plate-shaped structure, and two semiconductor integration components are provided. The two semiconductor integration components are attached to the outer walls on both sides of the heat exchanger.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a generator set with a heat recovery system, which recovers heat generated at different positions of the set by setting up multiple heat recovery systems, and uses the recovered heat to generate electricity, thereby increasing the amount of waste heat recovered and making full use of the recovered heat to improve power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural block diagram of a generator set with a heat recovery system according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic structural diagram of the first thermal power generation component according to an embodiment of the present invention is shown;

[0024] Figure 3 A schematic cross-sectional view showing the structure of the heat exchanger of the first thermal power generation assembly according to an embodiment of the present utility model;

[0025] Figure 4 A partial cross-sectional schematic diagram of the first thermal power generation component of an embodiment of the present utility model is shown;

[0026] Figure 5 Shows a schematic structural diagram of a heat recovery device according to an embodiment of the present utility model;

[0027] Figure 6 Show Figure 5 Schematic diagram of the cross-section at CC in the middle.

[0028] In the figure,

[0029] 11. Engine; 111. Engine radiator; 112. Generator; 2. Engine heat recovery system; 21. First circulation pump; 22. First thermal power generation component; 221. Heat exchanger; 222. Heat exchange cavity; 223. U-shaped connecting pipe; 224. Semiconductor integrated circuit; 225. Heat exchange fins; 23. First power converter; 3. Exhaust heat recovery system; 31. Heat recovery device; 311. Outer shell; 312. Inner shell; 313. Exhaust pipe; 314. Partition; 315. Bottom plate; 32. Second circulation pump; 33. Second thermal power generation component; 34. Second power converter; 4. Generator heat recovery system; 41. Third circulation pump; 42. Third thermal power generation component; 43. Third power converter. DETAILED DESCRIPTION

[0030] The following is a detailed explanation and description of the generator set with a heat recovery system provided by the present invention in conjunction with the drawings in the specification.

[0031] The utility model provides a generator set with a heat recovery system. By setting up multiple heat recovery systems, the heat generated at different locations of the unit is recovered and the recovered heat is used to generate electricity, thereby increasing the amount of waste heat recovered and making full use of the recovered heat to improve power generation efficiency. The utility model is described in detail below with reference to specific embodiments:

[0032] In some embodiments, as Figure 1As shown, the present invention provides a generator set with a heat recovery system, including an engine 11 and a generator 12, and also includes an engine heat recovery system 2 and an exhaust heat recovery system 3, which respectively recover the heat of the cooling system of the engine 11 and the exhaust.

[0033] In some embodiments, the engine heat recovery system 2 includes a first circulation pump 21, a first thermal power generation assembly 22, and a first power converter 23. The first circulation pump 21 and the first thermal power generation assembly 22 are connected in series to the coolant circulation loop of the engine 11 via a pipeline, and the first thermal power generation assembly 22 is electrically connected to the first power converter 23. Optionally, the engine 11 coolant outlet, the first circulation pump 21, the first thermal power generation assembly 22, the engine radiator 111, and the engine 11 coolant inlet are connected by connecting pipes to form a circulation loop. After the coolant flows out of the engine 11, it first flows through the first thermal power generation assembly 22, where it absorbs heat and uses it to generate electricity. The coolant then flows through the engine radiator 111 for further heat dissipation before returning to the engine 11. The first thermal power generation assembly 22 can recover some of the waste heat, and after passing through the engine radiator 111, it can fully cool the coolant in the engine 11, thereby improving the cooling effect of the engine 11. The first thermal power generation assembly 22 can use the recovered heat to generate electricity, which is then output through the first power converter 23.

[0034] In some embodiments, the exhaust heat recovery system 3 includes a heat recovery device 31, a second circulation pump 32, a second thermal power generation component 33, and a second power converter 34. The heat recovery device 31 is connected to the exhaust port of the engine 11, and the exhaust is carried out through the heat recovery device 31. A coolant flow path is provided on the heat recovery device 31. The second circulation pump 32 and the second thermal power generation component 33 are connected to the coolant flow path through a pipeline to form a circulation loop. The second thermal power generation component 33 is electrically connected to the second power converter 34. The exhaust of the engine 11 is discharged through the heat recovery device 31, and heat is recovered by the heat recovery device 31 during the discharge process. The second thermal power generation component 33 is connected to the heat recovery device 31, and the second circulation pump 32 can drive the flow of coolant to transfer the heat recovered by the heat recovery device 31 to the second thermal power generation component 33 for heat recovery. The second thermal power generation component 33 generates electricity using the recovered heat, and outputs power through the second power converter 34.

[0035] In this embodiment, if Figure 5 、 Figure 6As shown, the heat recovery device 31 includes an outer shell 311, an inner shell 312 and an exhaust pipe 313. Optionally, the inner shell 312 and the outer shell 311 are both cylindrical, and the inner shell 312 is arranged in the outer shell 311. A coolant flow path is formed between the outer shell 311 and the inner shell 312. An exhaust channel is formed inside the inner shell 312. The exhaust pipe 313 is connected to the inner shell 312 and communicates with the exhaust channel. In this embodiment, the axes of the inner shell 312 and the outer shell 311 are collinear, and the portion between the outer shell 311 and the inner shell 312 is blocked at both ends of the outer shell 311, forming a closed annular cavity between the radial outer side of the inner shell 312 and the radial inner side of the outer shell 311, i.e., the coolant flow path. An inlet and an outlet are formed on the side wall of the outer shell 311 to communicate with the coolant flow path. The outlet, the second circulation pump 32, the second thermal power generation component 33, and the inlet are sequentially connected through pipes to form a circulation loop.

[0036] Optionally, multiple partitions 314 are provided within the inner shell 312. The multiple partitions 314 are arranged parallel to each other and along the direction of smoke exhaust. The multiple partitions 314 divide the smoke exhaust channel into multiple independent channels. The provision of the partitions 314 can increase the structural strength of the inner shell 312. The heat insulation plate is made of metal. The provision of the heat insulation plate can also increase the contact area with the smoke exhaust, increase heat absorption, and more fully absorb the residual heat in the smoke. Furthermore, a bottom plate 315 is also provided within the smoke exhaust channel. The bottom plate 315 is arranged perpendicular to the axis of the smoke exhaust channel and has multiple smoke exhaust holes formed on the bottom plate 315. The bottom plate 315 is made of metal, which can further increase the contact area with the smoke and increase heat absorption.

[0037] In some embodiments, the generator set with a heat recovery system also includes a generator heat recovery system 4 for recovering heat from the generator 12. The generator heat recovery system 4 includes: a third circulation pump 41, a third thermal energy power generation component 42 and a third power converter 43. The third circulation pump 41 and the third thermal energy power generation component 42 are connected in series to the coolant circulation loop of the engine 11 through pipelines, and the third thermal energy power generation component 42 is electrically connected to the third power converter 43.

[0038] Optionally, the first thermal power generation component 22, the second thermal power generation component 33, and the third thermal power generation component 42 have the same structure and can be set to different sizes as needed. In this embodiment, the structure of the first thermal power generation component 22 is described in detail as an example. Figure 2 、 Figure 3 、 Figure 4As shown, the heat exchanger 221 includes a heat exchanger 221, a pipe joint, and a semiconductor assembly 224. The heat exchanger 221 has multiple heat exchange cavities 222 formed internally. The multiple heat exchange cavities 222 are connected in series to form a circulation channel. The semiconductor assembly 224 is attached to the outer wall of the heat exchanger 221. Optionally, the heat exchanger 221 is a metal block with multiple through-holes formed therein to form multiple heat exchange cavities 222. The multiple heat exchange cavities 222 are connected in series via a U-shaped connecting pipe 223 to form a circulation channel for the circulation of coolant. When the high-temperature coolant flows through the circulation channel, a portion of the heat is transferred to the outside through the heat exchanger 221. The semiconductor assembly 224 is a plate-like structure. Two semiconductor assemblies 224 are provided, and the two semiconductor assemblies 224 are attached to the outer walls of the heat exchanger 221 on both sides. In this embodiment, the semiconductor assembly 224 is fixedly connected to the heat exchanger 221 using high-temperature resistant thermal conductive adhesive.

[0039] Semiconductor assembly 224 absorbs heat from heat exchanger 221, creating a temperature difference between its cold and hot ends, and uses this high temperature difference to generate electricity. In this embodiment, semiconductor assembly 224 can be composed of multiple thermoelectric semiconductor units connected in series or parallel, depending on voltage and current requirements. Two semiconductor assemblies 224 connected in parallel have their positive and negative electrodes electrically connected to first power converter 23, which then stabilizes and inverts the voltage for output.

[0040] Optionally, multiple heat exchange fins 225 are provided on the semiconductor assembly 224. Multiple heat exchange fins 225 are arranged parallel to each other and connected to the semiconductor assembly 224. In this embodiment, the heat exchange fins 225 are fixedly connected to the semiconductor assembly 224 using a high-temperature-resistant thermally conductive adhesive. The heat exchange fins 225 can reduce the temperature on the side of the semiconductor assembly 224 not connected to the heat exchange body 221, increase the temperature difference between the two sides, and thus improve power generation efficiency.

[0041] In some embodiments, the first power converter 23 is a bidirectional DA / AC converter, which can be used for both power output and to supply power to the first thermal power generation assembly 22, thereby providing heating for the first thermal power generation assembly 22. When the ambient temperature is very low, the generator set controller detects that the engine 11 is at a low temperature and that the circulating water needs to be heated. The controller controls the bidirectional DC / AC converter to operate in reverse to supply power to the first thermal power generation assembly 22. At this time, heat is generated inside the first thermal power generation assembly 22 and transferred to the circulating water through the heat exchanger 221, thereby heating the circulating water and achieving a low-temperature heating start function. This can eliminate the original heating components of the engine 11, simplify the structure of the engine 11, and reduce the complexity and cost of the battery system.

[0042] Optionally, the outputs of the first power converter 23, the second power converter 34, and the third power converter 43 are connected to the same power output port and can be combined into a power generation output port. In this embodiment, the first power converter 23, the second power converter 34, and the third power converter 43 are identical, being bidirectional DA / AC converters. In other embodiments, the second power converter 34 and the third power converter 43 can be single-phase converters, as long as they can provide power output.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0044] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0045] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any at least one embodiment or example. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and simple improvements made to the essential contents of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A generator set with a heat recovery system, comprising an engine and a generator, characterized in that: Also includes: An engine heat recovery system includes a first circulation pump, a first thermal power generation component, and a first power converter, wherein the first circulation pump and the first thermal power generation component are connected in series to a coolant circulation loop of the engine via a pipeline, and the first thermal power generation component is electrically connected to the first power converter; The exhaust heat recovery system includes a heat recovery device, a second circulation pump, a second thermal power generation component and a second power converter. The heat recovery device is connected to the exhaust port of the engine and exhausts smoke through the heat recovery device. The heat recovery device is provided with a coolant flow path, the second circulation pump and the second thermal energy power generation component are connected to the coolant flow path through a pipeline to form a circulation loop, and the second thermal energy power generation component is electrically connected to the second power converter.

2. The power generation unit with a heat recovery system according to claim 1, characterized in that: The heat recovery device includes an inner shell, an outer shell and a smoke exhaust pipe. The inner shell is arranged in the outer shell, the coolant flow path is formed between the outer shell and the inner shell, and a smoke exhaust channel is formed inside the inner shell. The smoke exhaust pipe is connected to the inner shell and communicates with the smoke exhaust channel.

3. The power generation unit with a heat recovery system according to claim 2, characterized in that: A plurality of partitions are arranged in the smoke exhaust channel, and the plurality of partitions divide the smoke exhaust channel into a plurality of independent channels.

4. The power generating set with a heat recovery system according to claim 3, characterized in that: A bottom plate is further provided in the smoke exhaust passage. The bottom plate is perpendicular to the axis of the smoke exhaust passage, and a plurality of smoke exhaust holes are formed on the bottom plate.

5. The power generating set with a heat recovery system according to claim 1, characterized in that: It also includes a generator heat recovery system, which includes: a third circulation pump, a third thermal energy power generation component and a third power converter. The third circulation pump and the third thermal energy power generation component are connected in series to the coolant circulation loop of the engine through pipelines, and the third thermal energy power generation component is electrically connected to the third power converter.

6. The power generating set with a heat recovery system according to claim 5, characterized in that: Output ends of the first power converter, the second power converter, and the third power converter are connected to the same power output port.

7. The power generating set with a heat recovery system according to claim 5, characterized in that: The first power converter is a bidirectional DA / AC converter.

8. The power generation unit with a heat recovery system according to claim 5, characterized in that: The first thermal energy power generation assembly, the second thermal energy power generation assembly, and the third thermal energy power generation assembly have the same structure and include: A heat exchanger, a pipe joint, and a semiconductor integrated component. The heat exchanger has multiple heat exchange cavities formed inside. The multiple heat exchange cavities are connected in series to form a flow pipe. The semiconductor integrated component is attached to the outer wall of the heat exchanger.

9. The power generating set with a heat recovery system according to claim 8, characterized in that: A plurality of heat exchange fins are provided on the semiconductor assembly.

10. The power generating set with a heat recovery system according to claim 9, characterized in that: The semiconductor integrated component is a plate-shaped structure. Two semiconductor integrated components are provided, and the two semiconductor integrated components are attached to the outer walls on both sides of the heat exchange body.

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