CN117516206A

CN117516206A - Cooling and radiating structure of distributed energy station integrated discharge end platform of gas internal combustion engine

Info

Publication number: CN117516206A
Application number: CN202311695362.2A
Authority: CN
Inventors: 张开菊; 程屾; 孙清琛; 孙云云; 孙文龙
Original assignee: Jinan Daneng Power Technology Co ltd
Current assignee: Jinan Daneng Power Technology Co ltd
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-02-06

Abstract

The invention discloses a cooling and radiating structure of an integrated discharge end platform of a distributed energy station of a gas internal combustion engine, and relates to the technical field of distributed energy, wherein the integrated discharge end platform is provided with a cooling tower group, a radiator group, a vent and a chimney, a heat shielding cover is arranged on the outer side of the chimney, a guiding and diffusing opening is arranged at the top of the chimney, a rain-proof cover connected with the heat shielding cover is arranged above the guiding and diffusing opening, a rain-proof cover is arranged at the outlet of the top of the vent, and diversion isolation coamings are arranged at the tops of the cooling tower group and the radiator group so as to prevent backflow of air flows discharged by the chimney, the vent, the cooling tower group and the radiator group. The invention improves the energy utilization efficiency of the whole energy station by matching in various modes, and ensures the efficient operation of the cooling and radiating equipment.

Description

Cooling and radiating structure of distributed energy station integrated discharge end platform of gas internal combustion engine

Technical Field

The invention relates to the technical field of distributed energy sources, in particular to a cooling and heat dissipation structure capable of improving cooling efficiency of a distributed energy source station integrated discharge end platform of a gas internal combustion engine.

Background

The natural gas distributed energy system is an energy supply system which takes an internal combustion engine as a prime mover, takes a lithium bromide unit as waste heat utilization equipment to generate hot water and cold water, and directly outputs heat (cold) energy and electric energy to a certain area in a combined cooling heating and power mode. The lithium bromide unit is a device for preparing cold water and hot water required by a heating air-conditioning system or a process system in a vacuum environment by taking high-temperature flue gas and hot water discharged by prime movers such as an internal combustion engine (gas turbine) generator set and the like as driving heat sources. Because distributed energy engineering of gas internal combustion engines is mostly in commercial dense areas, land resources are limited, and requirements for controlling noise level are high, most of facilities such as cooling towers, heat dissipation equipment, chimneys, ventilation holes and the like are arranged on the roof of a building, so that an integrated discharge end is formed.

At present, the distributed energy station integrated discharge end platform of the gas internal combustion engine is compact in arrangement, cooling and radiating equipment needs cold air as a cooling medium, and a chimney discharges hot air flow, and because the cooling and radiating equipment and the chimney are positioned on the same platform, the phenomenon of mutual influence exists, so that the hot air flow is improperly discharged, the normal work of a cooling tower, radiating equipment and the like is influenced, and the normal work of main equipment is further influenced. Even in the high temperature environment in summer, the normal cooling of the area can be affected. Therefore, cooling and heat dissipation at the integrated exhaust end has become a significant problem encountered during operation of distributed energy stations for gas combustion engines.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a cooling and heat dissipation structure of a distributed energy station integrated discharge end platform of a gas internal combustion engine, which is matched in a plurality of modes, so that the energy utilization efficiency of the whole energy station is improved, and the efficient operation of cooling and heat dissipation equipment is ensured.

In order to achieve the above object, the present invention is realized by the following technical scheme:

the embodiment of the invention provides a cooling and radiating structure of an integrated discharge end platform of a distributed energy station of a gas internal combustion engine, wherein the integrated discharge end platform is provided with a cooling tower group, a radiator group, a vent and a chimney, a heat shield is arranged on the outer side of the chimney, a guiding and diffusing port is arranged at the top of the chimney, a rain shield connected with the heat shield is arranged above the guiding and diffusing port, a rain shield is arranged at the outlet of the top of the vent, and diversion isolation coamings are arranged at the tops of the cooling tower group and the radiator group so as to prevent backflow of air flows discharged by the chimney, the vent, the cooling tower group and the radiator group.

As a further implementation, a gap is left between one end of the heat shield and the integrated discharge end platform plane, and the other end is lower than the chimney top outlet.

As a further implementation mode, the heat shield cover is wrapped on the outer side of the chimney and comprises an inner layer and an outer layer, wherein the inner layer is made of a metal material, and the outer layer is made of a heat-insulating material.

As a further implementation manner, a set gap is arranged between the inner layer and the outer wall of the chimney.

As a further implementation, the outlet height of the guiding diffusion opening is higher than the platform enclosure; the height of the ventilation opening is consistent with the height of the enclosing wall of the platform.

As a further implementation mode, the rain cover main body is in an inverted cone shape, and the top of the inverted cone main body is plugged by a flat plate.

As a further implementation, the height of the diversion isolation coaming is consistent with the height of the platform enclosing wall.

As a further implementation manner, a supplementary air pipeline is further arranged, one end of the supplementary air pipeline is connected with a blower arranged on the enclosing wall of the platform, and the other end of the supplementary air pipeline corresponds to the air inlet of the cooling tower set.

As a further implementation, for the chimney adjacent to the cooling tower stack air inlet, a separator plate is mounted on its surface facing the cooling tower stack air inlet.

As a further implementation manner, the height of the isolation plate is consistent with that of the air inlet of the cooling tower set, and the minimum set distance is reserved between the isolation plate and the heat shielding cover.

The beneficial effects of the invention are as follows:

the invention adopts the modes of isolating the heat-discharging body, preventing the back flow of the air-discharging flow discharged by the smoke-discharging end, isolating the physical space of the heat-discharging body and the cooling equipment and introducing new air into the air inlet of the cooling equipment, solves the problem of the cold efficiency reduction of the cooling equipment caused by the phenomena of unreasonable heat and mass transfer field, hot air back flow effect and the like existing at present, improves the performance of the integrated discharging end, improves the cold efficiency, improves the energy utilization efficiency of the whole energy station and can ensure the high-efficiency operation of the cooling and heat-discharging equipment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is a schematic view of an integrated discharge side platform configuration;

FIG. 2 is a schematic diagram of an integrated discharge-side platform cooling heat dissipation structure in accordance with one or more embodiments of the present invention;

FIGS. 3 (a) and 3 (b) are schematic views of cooling tower stack exhaust port flow directing and insulating coaming structures in accordance with one or more embodiments of the present invention;

FIGS. 4 (a) -4 (d) are schematic views of heat shields according to one or more embodiments of the present invention;

FIGS. 5 (a) and 5 (b) are schematic views of a stack outlet structure according to one or more embodiments of the present invention;

FIG. 6 is a schematic view of a vent extension section structure according to one or more embodiments of the invention;

FIGS. 7 (a) and 7 (b) are schematic structural views of a chimney rain shield according to one or more embodiments of the present invention;

FIGS. 8 (a) and 8 (b) are schematic views of vent rain cover structures in accordance with one or more embodiments of the present invention;

FIGS. 9 (a) and 9 (b) are schematic illustrations of chimney guide diffuser structures according to one or more embodiments of the present invention;

FIG. 10 is a schematic diagram of a supplemental air duct arrangement in accordance with one or more embodiments of the present invention;

fig. 11 (a) and 11 (b) are schematic views of a spacer installation according to one or more embodiments of the present invention.

1, a radiator group; 2. a first cooling tower group; 3. a second cooling tower group; 4. a first chimney; 5. a first vent; 6. a second chimney; 7. a third cooling tower group; 8. a fourth cooling tower group; 9. a third chimney; 10. a platform enclosure; 11. an air inlet of the cooling tower set; 12. the first diversion isolation coaming; 13. a heat shield; 14. the second diversion isolation coaming; 15. a first extension; 16. guiding the diffusion opening; 17. a first rain cover; 18. a second extension; 19. a second vent; 20. a second rain cover; 21. a make-up air duct; 22. a blower; 23. a cooling tower stack exhaust port; 24. a partition plate; 25. an integrated discharge end platform; 26. a first rain cover support; 27. the second rain cover is supported.

Detailed Description

Embodiment one:

in an exemplary embodiment of the present invention, a distributed energy station integrated discharge end platform cooling heat dissipation structure for a gas combustion engine is provided as shown in fig. 2.

As shown in fig. 1, the outer side of the integrated discharge end platform 25 is provided with a platform enclosure 10, and the integrated discharge end platform 25 is further provided with a cooling tower group, a radiator group, three chimneys, two air vents, namely, the integrated discharge end platform 25 is provided with a radiator group 1, a first air vent 5, a second air vent 19, a first chimney 4, a second chimney 6, a third chimney 9, a first cooling tower group 2, a second cooling tower group 3, a third cooling tower group 7 and a fourth cooling tower group 8.

In order to increase the cooling effect of the integrated discharge end platform 25, this embodiment sets up a plurality of cooling modes, including: the first mode is heat shielding of the chimney, the second mode is preventing backflow of air flow discharged by the chimney and the vent, the third mode is preventing backflow of heat dissipation and discharge air flow of the cooling tower set and the radiator set, the fourth mode is supplementing new air for the cooling tower set, and the fifth mode is isolating physical space of the chimney and the cooling tower set.

The first mode to the third mode are used in a matched mode, and when the cooling efficiency is still low by adopting the three modes, the fourth mode or the fifth mode is continuously adopted.

Specifically, as shown in fig. 2, 4 (a) -4 (b), a heat shield 13 is arranged at the outer side of each chimney, the heat shield 13 is sleeved at the outer side of the chimney, the two heat shields are coaxially arranged, and two ends of the heat shield 13 are of an open structure. Since the chimney is arranged vertically, the heat shield 13 has one end as the top end and the other end as the bottom end.

The cross-section of the heat shield 13 may be circular, square or other shape. The heat shield 13 of the present embodiment is composed of two layers of materials, that is, an inner layer and an outer layer, the inner layer being made of a metal material, and the outer layer being made of a heat insulating material.

The heat shield 13 is supported on the plane of the integrated discharge end platform 25 through a support frame, the minimum distance h4 between the inner layer of the heat shield 13 and the outer wall of the chimney is not less than 100mm, a gap is reserved between the bottom end of the heat shield 13 and the plane of the integrated discharge end platform 25, the height h1 of the gap is not less than 200mm, the top end of the heat shield 13 is lower than the height of the outlet of the chimney, and the height h2 of the outlet plane of the top of the chimney is not less than 200mm, so that hot air is discharged out of the surrounding wall or smoothly discharged out of the chimney, and the influence of hot air backflow is minimized.

In order to prevent the backflow of the exhaust gas flow of the chimney, the embodiment adopts a mode of increasing the height of the chimney, adopting a structure of guiding the diffusion opening 16 for the chimney discharge opening and arranging the first rain cover 17 for the chimney discharge opening. As shown in fig. 5 (a) and 5 (b), the top of the chimney is provided with a first extension section 15, the top of the first extension section 15 is connected with a guiding diffusion opening 16, and the outlet height of the guiding diffusion opening 16 is not less than 200mm higher than that of the platform enclosing wall 10.

As shown in fig. 9 (a) and 9 (b), the guiding and diffusing port 16 is in an inverted truncated cone shape as a whole, the bottom opening of the guiding and diffusing port 16 is connected with the first extension section 15 and is consistent with the size of the chimney main body, and the diameter of the top opening of the guiding and diffusing port 16 is larger than that of the bottom opening of the guiding and diffusing port, so that an outward diffusing structure is formed; the height w1 of the guide diffusion opening 16 is not less than 200mm.

A first rain cover 17 is arranged above the guiding diffusion opening 16, and the first rain cover 17 is connected with the top end of the heat shielding cover 13 through a first rain cover support 26; as shown in fig. 7 (a) and 7 (b), the first rain cover 17 is in an inverted cone shape (inverted cone shape), the top is blocked by a flat plate, and the tip of the first rain cover 17 coincides with the center of the chimney. In this embodiment, the apex angle of the first rain cover 17 is 120 to 150 ° to cooperate with the guiding diffusion opening 16 to perform a better backflow prevention function.

The cross section of the first rain cover 17 may be circular or square, and when the cross section is circular, the first rain cover 17 is in an inverted cone shape as a whole, and when the cross section is square, the first rain cover 17 is in an inverted pyramid shape as a whole. The diameter or side length of the top panel of the first rain shield 17 is at least 100mm greater than the diameter of the thermal shield 13.

The vents are also protected from backflow by increasing the height of the vent to a level consistent with the height of the platform perimeter wall 10; a first rain cover 17 is provided at the vent outlet. As shown in fig. 6, the top of the vent has a second extension section 18, the top of the second extension section 18 is in an outward expansion structure, and the second extension section 18 is connected to the second rain cover 20 through a second rain cover support 27, so that the second rain cover 20 is located above the vent.

In order to prevent the backflow of the exhaust air flow of the cooling tower set and the radiator set 1, as shown in fig. 2, a first diversion isolation shroud 12 is installed along the boundary of the cooling tower set exhaust outlet 23, a second diversion isolation shroud 14 is installed along the boundary of the radiator set 1 at the top, and the heights of the first diversion isolation shroud 12 and the second diversion isolation shroud 14 are the same as the height of the platform enclosure 10.

It should be noted that the "first", "second", etc. in this embodiment are for convenience of description, and are not limited to the structure itself.

When the cooling efficiency is still lower after the measures are adopted, a supplementary air pipeline 21 is additionally arranged, one end of the supplementary air pipeline 21 is positioned on the platform enclosing wall 10 and is connected with a blower 22 arranged at the platform enclosing wall 10, and fresh air is fed through the blower 22; the other end of the supplementary air duct 21 corresponds to the cooling tower stack intake 11.

In addition, as shown in fig. 10, 11 (a) and 11 (b), a manner of physically isolating the chimney from the cooling tower stack may be adopted, and for the chimney adjacent to the cooling tower stack air intake 11, a partition plate 24 may be provided on three sides of the chimney facing the cooling tower stack air intake 11, and the height of the partition plate 24 is identical to the height of the cooling tower stack air intake 11. The minimum distance n1 of the partition plate 24 from the chimney heat shield 13 is not less than 100mm.

The embodiment carries out comprehensive study on the temperature field and the aerodynamic field of the integrated discharge end platform 25, adopts the modes of isolating the discharge body, preventing the smoke discharge end, cooling the heat dissipation equipment to discharge airflow backflow, isolating the physical space of the heat body and the cooling equipment and introducing new air into the air inlet of the cooling equipment, solves the problems of unreasonable heat and mass transfer field, cold efficiency reduction of the cooling equipment caused by the hot airflow backflow effect and other phenomena existing at present, improves the performance of the integrated discharge end, improves the cold efficiency, improves the energy utilization efficiency of the whole energy station, and can ensure the efficient operation of the cooling and heat dissipation equipment.

Embodiment two:

as shown in fig. 1 to 10, in this embodiment, the height of all chimneys needs to be increased, and all chimney outlets are provided with guide diffusion openings 16; the outlet of the guiding diffusion opening 16 is 200mm higher than the peripheral enclosing wall of the platform; all chimneys are externally provided with a heat shield 13, the cross section of the heat shield 13 is square, the opening of the lower end is 150mm away from the integrated discharge end, and the opening of the upper end is 100mm away from the top of the chimney. The inner layer of the heat shield 13 in this embodiment is made of carbon steel, and the outer layer is a heat insulating layer.

The top of all the cooling tower groups is provided with a first diversion isolation coaming 12, and the height of the first diversion isolation coaming 12 is consistent with that of the platform enclosing wall 10; the tops of all radiator groups are also provided with a first diversion isolation coaming 12 which is consistent with the platform enclosing wall 10 in height; all cooling tower stack air intakes 11 are provided with supplemental air ducts 21, one end of the supplemental air duct 21 corresponding to the cooling tower stack air intakes 11 and the other end extending to the platform perimeter wall 10 and being connected to the blower 22.

Embodiment III:

as shown in fig. 11 (a) and 11 (b), in the present embodiment, it is necessary to increase the height of all chimneys, and all chimney outlets are provided with guide diffusion openings 16; the outlet of the guiding diffusion opening 16 is 200mm higher than the peripheral enclosing wall of the platform; all chimneys are externally provided with a heat shield 13, the cross section of the heat shield 13 is square, the opening of the lower end is 150mm away from the integrated discharge end, and the opening of the upper end is 100mm away from the top of the chimney. The heat shield 13 of the embodiment is made of carbon steel material and is externally covered with a heat insulation layer;

the sections of the discharge ports 23 of all the cooling tower groups are provided with first diversion isolation coamings 12, and the height of the first diversion isolation coamings 12 is the same as that of the platform enclosing wall 10; the outlet sections of all radiator groups are provided with first diversion isolation coamings 12, and the height of the first diversion isolation coamings 12 is the same as that of the external enclosing wall of the integrated discharge end picture; all cooling tower stack air intakes 11 are provided with supplemental air ducts 21, one end of the supplemental air duct 21 corresponding to the cooling tower stack air intakes 11 and the other end extending to the platform perimeter wall 10 and being connected to the blower 22. All cooling tower group air inlets 11 adjacent to the chimney are provided with isolation plates 24, and the heights of the isolation plates 24 are consistent with the heights of the cooling tower group air inlets 11.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The integrated exhaust end platform cooling heat dissipation structure of the distributed energy station of the gas internal combustion engine is characterized in that a heat shield cover is arranged on the outer side of the chimney, a guiding diffusion opening is formed in the top of the chimney, a rain cover connected with the heat shield cover is arranged above the guiding diffusion opening, a rain cover is arranged at the outlet of the top of the ventilation opening, and diversion isolation coamings are arranged at the tops of the cooling tower group and the radiator group so as to prevent backflow of exhaust air flows of the chimney, the ventilation opening, the cooling tower group and the radiator group.

2. The distributed energy station integrated exhaust port platform cooling and heat dissipating structure of claim 1, wherein a gap is left between one end of the heat shield and the plane of the integrated exhaust port platform, and the other end is lower than the top outlet of the chimney.

3. The cooling and heat dissipating structure of a distributed energy station integrated exhaust end platform of a gas internal combustion engine according to claim 1 or 2, wherein the heat shield is wrapped outside the chimney and comprises an inner layer and an outer layer, the inner layer is made of a metal material, and the outer layer is made of a heat-insulating material.

4. The gas internal combustion engine distributed energy station integrated discharge end platform cooling heat dissipation structure according to claim 3, wherein a set gap is arranged between the inner layer and the outer wall of the chimney.

5. The gas internal combustion engine distributed energy station integrated discharge end platform cooling heat dissipation structure according to claim 1, wherein the outlet height of the guiding diffusion opening is higher than the platform enclosing wall; the height of the ventilation opening is consistent with the height of the enclosing wall of the platform.

6. The cooling and heat dissipating structure of a distributed energy station integrated exhaust end platform of a gas internal combustion engine according to claim 1, wherein the rain-proof cover body is in an inverted cone shape, and the top of the inverted cone body is plugged by a flat plate.

7. The gas internal combustion engine distributed energy station integrated discharge end platform cooling heat dissipation structure according to claim 1 or 5, wherein the height of the diversion isolation coaming is consistent with the height of the platform enclosing wall.

8. The cooling and heat dissipating structure of a distributed energy station integrated exhaust end platform of a gas combustion engine of claim 1, further comprising a supplemental air duct connected at one end to a blower disposed on the platform enclosure and at the other end to a cooling tower stack air intake.

9. The distributed energy station integrated discharge end platform cooling heat dissipating structure of a gas internal combustion engine according to claim 1 or 8, wherein for the chimney adjacent to the cooling tower stack air intake, a separator is mounted on its surface facing the cooling tower stack air intake.

10. The distributed energy station integrated exhaust port platform cooling and heat dissipating structure of claim 9, wherein the spacer plate is at a height consistent with the cooling tower stack air inlet and a minimum set distance is provided between the spacer plate and the heat shield.