TWI778572B - 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 Heat Dissipation Structure (2)

This work 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 of less than 6m, in order to enhance the heat dissipation effect, a plurality of spinning fans are generally installed on the roof of the workshop to discharge hot air and block the rain; or hang them 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 of expelling hot air and blowing 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 used is usually a raised Prince Building above the factory building, with open sides on both sides of the Prince Building. Windows, the work area under the workshop has side windows for air intake, and the roof of the workshop is especially raised to reduce the influence of radiant heat from the roof.

However, because the traditional heat dissipation method does not deal with the details of fluid flow, it is easy to form a large area of recirculation area and or low-speed area in the room, and the pollutant concentration in these areas is relatively high; and because the operator is prone to almost no wind and a feeling of sultry heat Therefore, it is intuitive to increase the air volume or increase the number of fans, but it is not effective, consumes energy and increases noise, and the operator is uncomfortable when the impact of high-speed airflow for a long time. Furthermore, due to insufficient opening area or poor distribution of the side windows of the Prince Building or the roof spin fan, most of the heat in the factory building cannot be effectively removed, and large backflow bubbles will be formed inside the factory building, which will roll the hot air from the top to the bottom. work area, make The temperature of the working area rises. At this time, 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 below the factory building, it will quickly turn upward due to the influence of the large backflow bubble. Therefore, except for a short distance near the windows on both sides, the workers felt a little cool, most of the interior of the workshop was stuffy. Even if a large number of fans are used to blow, the hot air is only sucked from the back of the fan, and then blown out from the front of the fan, which still cannot solve the problem because the temperature of most of the working areas below rises, which causes the discomfort of the operators and reduces the work efficiency. There are even occupational injuries.

Therefore, for example, the "heat dissipation structure of the factory building" of the Republic of China Invention Bulletin No. I659145 proposes a solution, which is mainly based on the installation of four side walls under a roof with an air outlet, and the first and second platforms are installed. 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 return 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 return 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 workshop can be entered into the first and second lower working areas through the two opposite air inlets respectively, and then the hot air can flow upward through the gap between the two platforms through thermal buoyancy. , which is discharged from the air outlet to dissipate heat.

However, the workshop structure in which an interval is formed between two opposite platforms, and the lower half of the two side walls connected to the two opposite platforms are respectively provided with air inlets. , and through the action of thermal buoyancy to achieve the effect of heat dissipation, but the structure of this "dual platform" is more complicated, and due to the small width of the gap between the two platforms, it is not suitable for large equipment. The number of places to be placed will be greatly limited; and the traditional way of increasing the air volume or increasing the number of fans for heat dissipation inside the factory is not only ineffective, consumes energy, and increases noise. In view of this, in order to provide a structure that is different from the conventional technology and improve the above-mentioned shortcomings, the creator has accumulated many years of experience and continuous research and development improvement, so this creation came into being.

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, causing discomfort to the operators, thus reducing work efficiency and even causing occupational injury; Air volume or increasing the number of fans will consume energy and increase noise, but can provide an effective heat dissipation structure, which can greatly reduce the temperature of the work area, so that the workers in the work area can work in a cool and comfortable environment, thereby Improve work efficiency and avoid occupational injuries caused by high temperature environments; make the cooling airflow 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 workshop of this creation includes a roof and a first side wall, a third side wall, a second side wall and a fourth side wall which are arranged under the roof and are successively arranged in sequence. The roof and each side wall are common. 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 workshop mainly includes a first platform, at least one air inlet and at least one exhaust outlet. The first platform is located in the indoor space of the factory. 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 supplying The upper and lower areas are divided into an upper return area and a lower working area, and 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 a transversely extending manner. 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 laterally extending manner, and the center height position of the exhaust port of the at least one exhaust port is located between the at least one air inlet port. Between the height of the center and the height of the top, cold air is input from at least one air inlet, and hot air is discharged from 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.

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

During implementation, this creation further includes a plurality of vents, which are opened between the partitions and the roof to discharge the hot air between the partitions and the roof.

During implementation, this creation 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, the second The platform is located above the first platform, and there is an intermediate return area between the second platform and the first platform. There is a second space between the second end of the second platform and the inner wall of the second side wall, and the length of the second space is smaller than the length of the first space. The total window opening ratio is the total opening area of the 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.

In practice, the above-mentioned total window opening ratio is preferably between 30% and 100%.

In order to further understand the creation, a preferred embodiment is given below, and the specific components of the creation and the effects achieved are described in detail as follows in conjunction with the drawings and drawing numbers.

1: Plant heat dissipation structure

2: Workshop

21: Roof

22: First side wall

23: Third Side Wall

24: Second Side Wall

25: Fourth Side Wall

26: Interior Space

27: Clapboard

28: Vents

3: The first platform

31,61: First end

32,62: Second end

33,63: third end

34,64: Fourth end

W1: first interval

35: Upper reflow area

36: Lower workspace

4: Air intake

R _w : window opening ratio

Q _w,t : Air flow rate sucked from the air inlet

5: exhaust port

H1: exhaust center height

H2: The height of the center of the air intake

H3: Height of the top of the air inlet

S1: High Speed Zone

S2: low speed zone

S3: Hybrid Layer

6: Second Platform

W2: Second interval

65: Intermediate reflow area

[FIG. 1] is a three-dimensional appearance schematic diagram of the first embodiment of the present invention.

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

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

[Fig. 4] is a state diagram of the first embodiment of the present invention.

[Fig. 5] is a graph of velocity vector, streamline and temperature distribution at the x-z section of the first embodiment of the present creation using CFD computer program to analyze and calculate the result.

[FIG. 6] is a three-dimensional appearance schematic diagram of the second embodiment of the present invention.

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

[Fig. 8] is a state diagram of the second embodiment of the present invention.

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

Please refer to FIG. 1 and FIG. 2 , which are the first embodiment of the heat dissipation structure 1 of the creative workshop, which is for installation in the interior of a workshop 2 and on each wall surface. 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 below the roof 21 and continuously surround in sequence. The wall frame encloses a rectangle, and together with the roof 21 frame an interior space 26 . The first side wall 22 and the second side wall 24 are parallel to each other, and there is a partition 27 under the roof 21. The partition 27 is a ceiling with a high thermal insulation coefficient, so as to block the radiant heat radiated downward by the roof 21, so that the The temperature downstream of the working area 36 under the partition 27 will not rise; and a plurality of vents 28 are opened on the side wall between the roof 21 and the partition 27, so as 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, a plurality of air inlets 4 and a plurality of exhaust ports 5. The first platform 3 is horizontally suspended in the indoor space 26 of the plant 2 , and the first platform 3 has a first end 31 , a second end 32 opposite to the first end 31 , a third end 33 and an opposite end 31 . 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 space 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 parts of the indoor space 26 into an upper part The reflow area 35 and the lower working area 36 , and the upper reflow area 35 is located between the bottom surface of the partition plate 27 and the top surface of the first platform 3 .

A plurality of air inlets 4 extend laterally in a rectangular array on the lower half of the first side wall 22 below the first platform 3, and the air inlets 4 are openable windows, so that the air outside the factory building 2 can enter the factory building. 2 in the lower work area 36. In practice, the air inlet 4 can also be a single horizontal window or a horizontal window with upper and lower rows, which can also allow the air outside the factory building 2 to enter the indoor space 26 of the factory building 2 . As for the air flow (Q _w,t ) drawn into the factory building 2 from the air inlet 4 , it has a correlation with the size of the total window opening ratio (R _w ).

As shown in FIG. 3 , in this embodiment, the total window opening ratio (R _w )=total opening area of the plurality of air inlets 4/area of the second sidewall 24 under the partition plate 27; When the plate 27 is installed, its total window opening ratio (R _w )=the total opening area of the plurality of air inlets 4/the area of the second side wall 24 under the roof 21 . The total window opening ratio (R _w ) is between 20% and 100%. During implementation, the total window opening ratio (R _w ) is 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 ), the better; for example: when R _w >30%, the air flow ( Q _w,t ) will approach the maximum constant value. That is to say, when the pressure loss coefficient of the window opening is above R _w >30%, it is close to the smaller saturation value. On the contrary, when the total window opening ratio (R _w ) is below 20%, or even below 10%, a recirculation zone will be generated in the room, and the hot air in the indoor space 26 cannot be effectively discharged from the plurality of exhaust ports. 5 is discharged outwards.

A plurality of exhaust ports 5 are opened on the lower half of the second side wall 24 by extending laterally, and the exhaust ports 5 are fans. During implementation, the exhaust ports 5 can also be horizontal air outlets connected to the air extraction equipment. The position of the exhaust center height H1 of each of the exhaust ports 5 is between the center height H2 and the top height H3 of the plurality of air intake ports 4, that is, the position of the exhaust center height H1 of the plurality of exhaust ports 5 must be higher The center height H2 of the plurality of air inlets 4 is lower than the top height H3 of the plurality of air inlets 4 at the same time.

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

Based on the structure of the above-mentioned first embodiment, this creation is simulated and tested with the following parameters in a factory with a height of 6m, a width of 50m and a 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 intakes): 1.8m

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

Length of the first platform: 8m

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

Air volume of a single fan (exhaust port): 363CMM

Axial wind speed at the outlet of a single fan (exhaust port): 7.0m/s

The total air volume of multiple fans (exhaust ports): 19974CMM

According to the above designed windows, the total window opening ratio (R _w ) is >60%. After analyzing the calculation results by CFD computer program, the velocity vector, streamline and temperature distribution diagram are shown in the xz section in Figure 5. The arrow represents the velocity vector, and the black line along the tangent direction of the velocity vector represents the streamline; the colored part represents the temperature, the roof is assigned a temperature of 60°C, and the red is the highest temperature (the temperature inside the roof is assigned as 60°C), in order Brown, yellow, light green, vivid green, light blue to dark blue (the temperature of dark blue is the temperature of the atmosphere and is designated as 29°C). Through the window size control of the total window opening ratio (Rw), the velocity vector and streamline of the lower working area show that the flow is almost parallel from left to right, and no recirculation area or low-velocity area is generated; color temperature distribution display: in the downstream area, away from Below the floor is 3 meters high, 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 rolled into the lower working area. Indeed, the temperature of the lower working area 36 can be effectively lowered.

Please refer to FIG. 6 and FIG. 7 , which are the second embodiment of the heat dissipation structure 1 for the workshop of the creation. The difference from the first embodiment is that the 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 There is a second space W2 between the inner wall surface of the first side wall 22 , 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 fourth end 64 is connected to the inner wall 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, allowing the radiant heat of the second platform 6 to affect downwards and increasing the air in the intermediate recirculation area 65 temperature, and the total window opening ratio (R _w )=total opening area of the plurality of air inlets 4/area of the second side wall 24 under the second platform 6 .

Thereby, as shown in FIG. 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, more It can effectively avoid the exchange phenomenon between the hot air above the second platform 6 and the air flow in the intermediate return area 65 , prevent the hot air 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 mentioned above, the simulation test is carried out in the workshop with a height of 9m, a width of 50m and a length of 75m with the following parameters, 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 intakes): 1.8m

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

Length of the first platform: 6m

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

Air volume of a single fan (exhaust port): 363CMM

Axial wind speed at the outlet of a single fan (exhaust port): 7.0m/s

The total air volume of multiple fans (exhaust ports): 19974CMM

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

Therefore, this creation has the following advantages:

1. This creation can block the hot air above the workshop and roll down to the lower working area through a 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 enables the workers in the lower working area to work in a cool and comfortable environment, so as to improve work efficiency and avoid occupational injuries caused by high temperature environments.

2. This creation can accommodate and place tall and large machines in the open space of the first compartment or/and the second compartment, therefore, the available space can be effectively increased 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 plant heat dissipation structure that can effectively reduce the temperature of the work area where machines and personnel work, save electricity, reduce noise and effectively utilize space, It is of great value for industrial use, and it is necessary to file an application for an invention patent in accordance with the law.

1: Plant heat dissipation structure

2: Workshop

21: Roof

22: First side wall

24: Second Side Wall

26: Interior Space

27: Clapboard

28: Vents

3: The first platform

31: First End

32: Second End

W1: first interval

35: Upper reflow area

36: Lower workspace

4: Air intake

5: exhaust port

H1: exhaust center height

H2: The height of the center of the air intake

H3: Height of the top of the air inlet

Claims (8)

A heat dissipation structure for a factory building, 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 under the roof and successively arranged in sequence, the roof, the The first sidewall, the third sidewall, the second sidewall and the fourth sidewall together frame an indoor space, and the first sidewall is parallel to the second sidewall; the plant heat dissipation structure includes: a first platform located in the indoor space of the factory, 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 separate the upper and lower areas into an upper return area and a lower working area, and 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 lower half of the first side wall under the first platform in a laterally extending manner, and the total window opening ratio is the total opening area of the at least one air inlet/the second side wall area, the total fenestration 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 laterally extending manner, and the center height position of the exhaust port 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 from the at least one air inlet, and hot air is discharged from the at least one air outlet. The plant heat dissipation structure of 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, and the first platform has a third end. The four ends are connected to the inner wall of the fourth side wall. The heat dissipation structure of a factory building as claimed in claim 1, further comprising a partition, the partition is positioned between the roof and the first platform, and the total window opening ratio is the total opening area of the at least one air inlet/the partition The second sidewall area below the board. The heat dissipation structure of the factory building according to claim 3, further comprising a plurality of ventilation openings, the plurality of ventilation openings are opened between the partition board and the roof for discharging the hot air between the partition board and the roof. The plant heat dissipation structure of claim 1, further comprising 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 The inner wall 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 There is a second space between the inner walls of the second side wall, and the length of the second space is smaller than the length of the first space. The heat dissipation structure of a factory building as claimed in claim 5, wherein the total window opening ratio is the total opening area of the at least one air inlet/the area of the second side wall below the second platform. The plant heat dissipation structure of 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. For the heat dissipation structure of the factory building as claimed in item 1, 3 or 6, the total window opening ratio is between 30% and 100%.

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