TW202240056A - Heat disspation structure for factory building(2) - Google Patents

Abstract

A heat dissipation structure for a factory building comprises a first platform, and a first end of the first platform connects with an inner wall surface of a first lateral wall, so that the heat dissipation structure is separated into an upper recirculation area and a lower working area. The first lateral wall is parallel to a second lateral wall. A first interval is provided between a second end of the first platform and an inner wall surface of the second lateral wall. A lower half of the first lateral wall below the first platform has at least one transversely extended air inlet, and a total window ratio is between 20% and 100%; and a lower half of the second lateral wall has at least one transversely extended air outlet, and an exhaust center of the at least one air outlet is located at a vertical position between a center position and a top position of the at least one air inlet. Thereby, cold air outside the factory building is imported into the lower working area through the at least one air inlet and hot air is discharged from the at least one air outlet for heat dissipation.

Description

Plant cooling structure (2)

This creation is related to a heat dissipation structure of a factory building, especially one that can effectively remove the heat in the factory building.

For small and medium-sized workshops with a height below 6m, in order to enhance the heat dissipation effect, multiple spinning fans are generally installed on the roof of the workshop to discharge heat and keep out rain; or hang above the workers in the working area of the workshop. A series of fans, or a series of fans placed below the height of the person, in the hope that the hot air will be drawn out and blown over the person to dissipate heat. For a large factory building, such as a factory building with a height of 15m, a width of 50m, and a length of 200m, the natural ventilation adopted is usually an elevated prince building above the factory building, and the two sides of the prince building have open sides respectively. Windows, the working area under the factory building has side windows for air intake, and the roof of the factory building is especially raised to reduce the impact of roof radiant heat.

However, because the traditional heat dissipation method does not deal with the details of fluid flow, it is easy to form large areas of recirculation and/or low-velocity areas in the room, and the concentration of pollutants in these areas is relatively high; Feeling, so the intuitive way is to increase the air volume or increase the number of fans, but the effect is not good, it consumes energy and increases the noise, and it is uncomfortable for the operator to be impacted by the high-speed airflow for a long time. Furthermore, due to the insufficient opening area or poor distribution of the side windows or the roof spinning fans of the Prince Building, most of the hot air in the factory building cannot be effectively removed, and large backflow bubbles will be formed inside the factory building, rolling the hot air from above to the bottom. work area, make The temperature in the working area will rise. At this moment, the air outside the factory building is pulled by the buoyancy of the hot air inside the factory building. After entering the side windows on both sides of the lower part of the factory building, due to the influence of large backflow bubbles, it will quickly turn upward. Therefore, except for the short distance near the windows on both sides, where the workers feel some coolness, most areas inside the factory building are stuffy. Even if a large number of fans are used to blow, the hot air is only sucked in from the back of the fan and blown out from the front of the fan. It still cannot solve the problem of discomfort for the workers due to the temperature rise in most of the working area below, which reduces the work efficiency. There are even problems with occupational injuries.

Therefore, such as the "factory building heat dissipation structure" of the invention announcement No. I659145 of the Republic of China, a solution is proposed, which is mainly to provide four side walls under a roof with an air outlet, and set the first and second platforms In the factory building, the first and second side walls of the four side walls are parallel to each other, and the lower half of the first and second side walls are respectively provided with air inlets; the first end of the first platform is connected to the first side wall, The upper and lower areas are divided into a first upper backflow area and a first lower working area; the first end of the second platform is connected to the second side wall, and the upper and lower areas are divided into a second upper backflow area and a second lower working area; and A space is formed between the second end of the first platform and the second end of the second platform. In this way, the air outside the factory can be allowed to enter the first and second lower working areas through the two opposite air inlets, and then the hot air can flow upward through the gap between the two platforms through the effect of thermal buoyancy , to be discharged from the air outlet to dissipate heat.

However, a space is formed between two opposite platforms, and air inlets are respectively provided in the lower half of the two side walls connected by the two opposite platforms, although the two air inlets can simultaneously , and achieve the effect of heat dissipation through the effect of thermal buoyancy, but the structure of this "double platform" is more complicated, and because the interval width between the two platforms is small, it is difficult for large machines The number of placements will be greatly limited; the traditional way of increasing the air volume or increasing the number of fans for heat dissipation inside the factory building is not only ineffective, but also consumes energy and increases noise. In view of this, in order to provide a structure different from the conventional technology and improve the above-mentioned shortcomings, the author has accumulated many years of experience and continuous research and development, so this creation is produced.

One of the purposes of this creation is to provide a factory building heat dissipation structure, so as to solve the temperature rise in most of the working areas in the conventional factory building, which will cause discomfort to the workers, thereby reducing work efficiency and even causing occupational injuries; and due to the increased The air volume or increasing the number of fans will consume energy and increase noise, but an effective heat dissipation structure can be provided to greatly reduce the temperature in the work area, so that the operators in the work area can work in a cool and comfortable environment, thus Improve work efficiency and avoid occupational injuries caused by high temperature environment; let the cooling air flow flow smoothly to save power consumption and reduce noise, and improve the quality of the working environment.

In order to achieve the above purpose, the factory building of this creation includes a roof and the first side wall, the third side wall, the second side wall and the fourth side wall which are arranged continuously in sequence under the roof. The frame encloses an indoor space, and the first side wall is parallel to the second side wall; and the heat dissipation structure of the factory building in this creation mainly includes a first platform, at least one air inlet and at least one air outlet. Wherein the first platform is located in the indoor space of the factory building, the first platform has a first end and a second end opposite to the first end, the first end of the first platform is connected to the inner wall of the first side wall, for The upper and lower areas are divided into an upper backflow area and a lower working area. There is a first interval between the second end of the first platform and the inner wall of the second side wall; at least one air inlet is opened in the For the lower half of the first side wall below the first platform, the total window opening ratio is the total opening area of at least one air inlet/the second side wall area, and the total window opening ratio is between 20% and 100%; and at least An exhaust port is opened in the lower half of the second side wall in a horizontally extending manner, and the height of the exhaust center of at least one exhaust port is between that of at least one air intake port Between the height of the center and the height of the top, cool air is input through at least one air inlet, and hot air is discharged through at least one air outlet.

During implementation, the first platform has a third end and a fourth end opposite to the third end, the third end is connected to the inner wall of the third side wall, and the fourth end is connected to the inner wall of the fourth side wall.

During implementation, the invention further includes a partition, the partition is positioned between the roof and the first platform, and the total opening ratio is the total opening area of at least one air inlet/the area of the second side wall below the partition.

During implementation, the creation further includes a plurality of vents, and a plurality of vents are opened between the partition and the roof to discharge heat between the partition and the roof.

During implementation, the invention further includes a second platform, the second platform has a first end and a second end opposite to the first end, the first end of the second platform is connected to the inner wall of the first side wall, and the second The platform is located above the first platform, and there is an intermediate reflow area between the second platform and the first platform. There is a second interval between the second end of the second platform and the inner wall of the second side wall, and the length of the second interval is smaller than the length of the first interval. The total opening ratio is the total opening area of at least one air inlet/the area of the second side wall below the second platform.

During implementation, the second platform has a third end and a fourth end opposite to the third end, the third end is connected to the inner wall of the third side wall, and the fourth end is connected to the inner wall of the fourth side wall.

During implementation, the above-mentioned total window opening ratio is more preferably between 30% and 100%.

In order to further understand this creation, a preferred embodiment is given below, and the specific composition and effect of this creation are described in detail as follows in conjunction with the drawings and figure numbers.

1: Plant heat dissipation structure

2: Plant

21: Roof

22: First side wall

23: Third side wall

24: Second side wall

25: Fourth side wall

26: Interior space

27: Partition

28: vent

3: The first platform

31,61: first end

32,62: second end

33,63: the third terminal

34,64: fourth end

W1: first interval

35: Upper backflow area

36: Lower work area

4: air inlet

R _w : window opening ratio

Q _w,t : Air flow inhaled from the air inlet

5: Exhaust port

H1: exhaust center height

H2: Center height of air inlet

H3: Height of the top of the air inlet

S1: High speed zone

S2: low speed zone

S3: mixed layer

6: The second platform

W2: second interval

65: Intermediate reflow area

[Fig. 1] is the three-dimensional appearance schematic diagram of the first embodiment of this creation.

[Fig. 2] is a side sectional view of Fig. 1.

[Fig. 3] is a graph showing the relationship between the total window opening ratio (R _w ) and the air flow (Q _w,t ) sucked in from the air inlet in the first embodiment of the invention.

[Fig. 4] is the use status diagram of the first embodiment of this creation.

[Fig. 5] is the velocity vector, streamline and temperature distribution diagram in the x-z section of the first embodiment of this creation, which is the result of analysis and calculation by CFD computer program.

[Fig. 6] is the three-dimensional appearance schematic diagram of the second embodiment of this creation.

[Fig. 7] is a side sectional view of Fig. 6.

[Fig. 8] is the use state diagram of the second embodiment of this creation.

[Fig. 9] is the velocity vector, streamline and temperature distribution diagram in the x-z section of the second embodiment of the present creation using CFD computer program to analyze and calculate the results.

Please refer to Fig. 1 and shown in Fig. 2, it is the first embodiment of the heat dissipation structure 1 of the factory building of this creation, and it is for being installed on the inside of a factory building 2 and on each wall. The factory building 2 includes a roof 21 and a first side wall 22, a third side wall 23, a second side wall 24, and a fourth side wall 25, which are arranged under the roof 21 and are sequentially and continuously surrounded. The wall frame surrounds a rectangle, and forms an indoor space 26 together with the roof 21 . The first side wall 22 and the second side wall 24 are parallel to each other, and there is a partition plate 27 below the roof 21. The partition plate 27 is a ceiling with a high thermal insulation coefficient, so as to block the radiant heat emitted by the roof 21 downwards, so that The temperature in the downstream of the working area 36 below the partition 27 will not rise; and the side wall between the roof 21 and the partition 27 is provided with a plurality of vents 28 to discharge the hot air between the roof 21 and the partition 27 .

The heat dissipation structure 1 of the creative workshop mainly includes a first platform 3 and a plurality of air inlets 4 and a plurality of exhaust ports 5. Wherein the first platform 3 is suspended horizontally in the indoor space 26 of the factory building 2, the first platform 3 has a first end 31, a second end 32 opposite to the first end 31, a third end 33 and the opposite end. Towards a fourth end 34 of the third end 33, the first end 31 of the first platform 3 is connected to the inner wall of the first side wall 22, and there is a wall between the second end 32 and the inner wall of the second side wall 24. A first interval W1, the third end 33 is connected to the inner wall of the third side wall 23, and the fourth end 34 is connected to the inner wall of the fourth side wall 25, so as to separate the upper and lower areas of part of the indoor space 26 into an upper The backflow area 35 and the lower working area 36 , the upper backflow area 35 is located between the bottom surface of the partition 27 and the top surface of the first platform 3 .

A plurality of air inlets 4 are horizontally extended in a rectangular array on the lower half of the first side wall 22 below the first platform 3. The air inlets 4 are windows that can be opened to allow the air outside the factory building 2 to enter the factory building. 2 in the lower working area 36. During implementation, the air inlet 4 can also be a single horizontal window or a double row of horizontal windows up and down, allowing the air outside the factory building 2 to enter the indoor space 26 of the factory building 2 equally. As for the air flow rate (Q _w,t ) sucked into the factory building 2 from the air inlet 4, it is related to the size of the total window opening ratio (R _w ).

As shown in Figure 3, in the present embodiment, its total opening ratio (R _w )=the total opening area of a plurality of air inlets 4/the area of the second side wall 24 below the partition 27; and when there is no partition When the plate 27 is used, its total window opening ratio (R _w )=total opening area of a plurality of air inlets 4/area of the second side wall 24 below the roof 21. The total window opening ratio (R _w ) is between 20% and 100%, and in practice, the total window opening ratio (R _w ) is more preferably between 30% and 100%. When the total window opening ratio (R _w ) is greater than 20%, the larger the total window opening ratio (R _w ) is, the better; for example: when R _w >30%, the air flow drawn into the factory building 2 from the windows ( Q _w,t ) will approach the maximum fixed value. That is to say, the pressure loss coefficient of the window opening is close to a small saturation value when R _w >30%. Conversely, when the total window opening ratio (R _w ) is below 20%, or even below 10%, there will be a recirculation zone in the room, and the hot air in the indoor space 26 will not be able to pass through multiple exhaust ports effectively. 5 to discharge outwards.

A plurality of exhaust outlets 5 are opened in the lower half of the second side wall 24 by extending horizontally. The exhaust outlets 5 are fans. During implementation, the exhaust outlets 5 can also be horizontal air outlets connected to the air extraction equipment. The exhaust center height H1 of each exhaust port 5 is between the central height H2 and the top height H3 of the plurality of air inlets 4, that is, the exhaust center height H1 of the plurality of exhaust ports 5 must be high The central height H2 of the plurality of air inlets 4 is lower than the top height H3 of the plurality of air inlets 4 .

Thereby, as shown in FIG. 4 , when workers or machines that generate heat are distributed in the lower working area 36 , the cold air outside the factory building 2 enters the indoor space 26 through a plurality of air inlets 4 and drives the indoor space 26 The hot air inside is discharged outwards by a plurality of exhaust outlets 5, because the air flow velocity generated in the working area 36 below the first platform 3 is greater than the flow velocity of the recirculation area 35 above the top surface of the first platform 3, that is A high-speed zone S1 and a low-speed zone S2 will be formed respectively, and a fan-shaped mixed layer S3 will be formed at the boundary between the high-speed zone S1 and the low-speed zone S2. This mixed layer S3 can pass through the barrier of the first platform 3. The hot gas above a platform 3 forms a reflow bubble in the upper reflow area 35, and most of it is confined in the upper reflow area 35; while the small part of hot air above the first platform 3 and most of the hot air in the lower working area 36 are The air in the high-speed zone S1 flows rapidly, and is exhausted from the first side wall 22 toward the second side wall 24 to the outside of the factory building 2 to reduce the temperature of the lower working zone 36 .

Based on the structure of the above-mentioned first embodiment, this creation is simulated and tested with the following parameters in a factory building with a height of 6m, width of 50m, and length of 75m, and is analyzed and calculated by the computer program of Computational Fluid Dynamics (CFD).

Total number of windows (air intakes): 80, 2 columns

The distance between the upper edge and the lower edge of the window (multiple air inlets): 1.8m

Window (inlet) inlet wind speed: 2.6m/s

Length of the first platform: 8m

Total number of fans (exhaust ports): 55, 1 column

Single fan (exhaust port) air volume: 363CMM

Single fan (exhaust port) outlet axial wind speed: 7.0m/s

Multiple fans (exhaust port) total air volume: 19974CMM

According to the above designed windows, the total opening ratio (R _w )>60%. After analyzing the calculation results by the CFD computer program, the velocity vector, streamline and temperature distribution diagram are shown in Figure 5 in the xz section. Among them, the arrow represents the velocity vector, and the black area line along the tangent direction of the velocity vector represents the streamline; the colored part represents the temperature level, and the roof specifies a temperature of 60°C, and red is the highest temperature (the temperature inside the roof is specified as 60°C), followed by Brown, yellow, light green, bright green, light blue to dark blue (the temperature of dark blue is the temperature of the atmosphere, designated as 29 ℃). Controlled by the window size of the total window opening ratio (Rw), the velocity vector and streamline in the lower working area show almost parallel flow from left to right, without recirculation area or low velocity area; the color temperature distribution shows: in the downstream area, away from Below the floor height of 3 meters, the temperature of the airflow is at most about 0.1~0.2°C higher than the atmospheric temperature. In the lower working area, it maintains almost the atmospheric temperature (dark blue), indicating that the high-temperature air above will not be drawn into the lower working area. Indeed, the temperature of the lower working area 36 can be effectively reduced.

Please refer to Fig. 6 and shown in Fig. 7, it is the second embodiment of the factory building cooling structure 1 of this creation, and its difference with the first embodiment is: this creation further includes a second platform 6, and the second platform 6 has A first end 61 and a second end 62 opposite to the first end 61, a third end 63 and a fourth end 64 opposite to the third end 63, the first end 61 of the second platform 6 is connected The inner wall surface of the first side wall 22, there is a second interval W2 between the second end 62 of the second platform 6 and the inner wall surface of the second side wall 24, and the third end 63 is connected to the inner wall of the third side wall 23. The wall surface, the fourth end 64 is connected to the inner wall surface of the fourth side wall 25 . The second platform 6 is located above the first platform 3 , there is an intermediate reflow area 65 between the second platform 6 and the first platform 3 , and the length of the second interval W2 is smaller than the length of the first interval W1 . The second platform 6 is a material or structure with a high thermal insulation coefficient, so as to prevent the hot air above the second platform 6 from heating the second platform 6, and allow the radiant heat of the second platform 6 to affect downwards and increase the air in the middle recirculation area 65 temperature, and the total opening ratio (R _w )=the total opening area of the plurality of air inlets 4/the area of the second side wall 24 below the second platform 6.

In this way, as shown in Figure 8, for a factory building with a height of more than 6m, through the setting of the second platform 6, in addition to accommodating and placing taller large machines through the open space of the second interval W2, it is also possible to It can effectively avoid the exchange phenomenon between the hot air above the second platform 6 and the air flow in the middle recirculation area 65, prevent the hot air from above from rolling down into the lower working area 36, and maintain the ventilation and heat dissipation effect of the lower working area 36.

Based on the structure of the second embodiment above, this creation is simulated and tested with the following parameters in a high-rise factory building with a height of 9m, a width of 50m, and a length of 75m, and the computer program of Computational Fluid Dynamics (CFD) is used for analysis and calculation.

Total number of windows (air intakes): 80, 2 columns

The distance between the upper edge and the lower edge of the window (multiple air inlets): 1.8m

Window (inlet) inlet wind speed: 2.6m/s

Length of the first platform: 6m

Total number of fans (exhaust ports): 55, 1 row

Single fan (exhaust port) air volume: 363CMM

Single fan (exhaust port) outlet axial wind speed: 7.0m/s

Multiple fans (exhaust port) total air volume: 19974CMM

After analyzing the calculation results by the CFD computer program, the velocity vector, streamline and temperature distribution diagram are shown in the x-z section in Figure 9. Among them, the arrow represents the velocity vector, and the black area line along the tangent direction of the velocity vector represents the streamline; the colored part represents the temperature level, the roof specifies a temperature of 60°C, and red is the highest temperature (the temperature inside the roof is specified as 60°C), followed by Brown, yellow, light green, bright green, light blue to dark blue (the temperature of dark blue is the temperature of the atmosphere, designated as 29 ℃). A flat recirculation zone is formed between the first platform and the second platform, but it does not hang down to the lower working zone. Velocity vectors and streamlines in the lower working area show almost parallel flow from left to right, no recirculation area or low velocity area; color temperature distribution shows: in the downstream area, below 3 meters above the floor, the temperature of the airflow remains almost atmospheric The temperature (dark blue) shows that the high-temperature air above will not be rolled into the lower working area, and the temperature of the lower working area 36 can indeed be effectively reduced.

Therefore, this creation has the following advantages:

1. This creation can prevent the hot air from the upper part of the factory building from rolling down to the lower working area through the gentle and smooth airflow, so that the temperature of the lower working area can be greatly reduced. Therefore, it can not only reduce the speed of the exhaust fan to save power consumption and reduce noise It is produced to improve the quality of the working environment, and enable the operators in the lower working area to work in a cool and comfortable environment to improve work efficiency and avoid occupational injuries caused by high temperature environments.

2. This creation can accommodate and place taller large machines in the open space of the first compartment or/and the second compartment. Therefore, it can effectively increase the usable space on the premise of effective heat dissipation.

To sum up, according to the content disclosed above, this creation can indeed achieve the expected purpose, providing a cooling structure of the factory building that can effectively reduce the temperature of the working area where machines and personnel work, save electricity, reduce noise and effectively utilize space. It is of great value in industrial application, so I filed an application for a patent for invention according to the law.

1: Plant heat dissipation structure

2: Plant

21: Roof

22: First side wall

24: Second side wall

26: Interior space

27: Partition

28: vent

3: The first platform

31: first end

32: second end

W1: first interval

35: Upper backflow area

36: Lower work area

4: air inlet

5: Exhaust port

H1: exhaust center height

H2: Center height of air inlet

H3: Height of the top of the air inlet

Claims (8)

A factory building heat dissipation structure, the factory building includes a roof and a first side wall, a third side wall, a second side wall and a fourth side wall arranged continuously under the roof in sequence, the roof, the The first side wall, the third side wall, the second side wall and the fourth side wall jointly frame an indoor space, and the first side wall is parallel to the second side wall; the heat dissipation structure of the factory building includes: A first platform, which is located in the indoor space of the factory building, the first platform has a first end and a second end opposite to the first end, the first end of the first platform is connected to the first The inner wall of the side wall is used to divide the upper and lower areas into an upper return area and a lower working area, and there is a first gap between the second end of the first platform and the inner wall of the second side wall; At least one air inlet is opened in the lower half of the first side wall below the first platform in a horizontally extending manner, and the total opening ratio is the total opening area of the at least one air inlet/the second side wall area, the total window opening ratio is between 20% and 100%; and At least one exhaust port is opened in the lower half of the second side wall in a horizontally extending manner, and the exhaust center height of the at least one exhaust port is between the center height and the top of the at least one air intake port Between the height positions, cool air is input through the at least one air inlet, and hot air is discharged through the at least one air outlet. The heat dissipation structure of a factory building according to claim 1, wherein the first platform has a third end and a fourth end opposite to the third end, the third end is connected to the inner wall of the third side wall, the first platform The four ends are connected to the inner wall of the fourth side wall. As the heat dissipation structure of the factory building in claim 1, it further includes a partition, the partition is positioned between the roof and the first platform, and the total opening ratio is the total opening area of the at least one air inlet/the partition The area of the second side wall below the panel. As for the heat dissipation structure of the factory building in claim 3, it further includes a plurality of ventilation openings, and the plurality of ventilation openings are opened between the partition board and the roof to discharge hot air between the partition board and the roof. Such as the plant heat dissipation structure of claim 1, it further includes a second platform, the second platform has a first end and a second end opposite to the first end, the first end of the second platform is connected to On the inner wall surface of the first side wall, the second platform is located above the first platform, and there is an intermediate return area between the second platform and the first platform; the second end of the second platform is connected to the first platform. There is a second interval between the inner walls of the second side wall, and the length of the second interval is smaller than the length of the first interval. The factory building heat dissipation structure according to claim 5, wherein the total opening ratio is the total opening area of the at least one air inlet/the area of the second side wall under the second platform. The heat dissipation structure of a factory building according to claim 5 or 6, wherein the second platform has a third end and a fourth end opposite to the third end, and the third end is connected to the inner wall of the third side wall, The fourth end is connected to the inner wall of the fourth side wall. Such as the heat dissipation structure of the factory building in claim 1, 3 or 6, wherein the total window opening ratio is between 30% and 100%.

Images