KR101700038B1 - Optimal design method for preventing condensation using a thermal analysis technique for the uninterruptible power supply - Google Patents

Abstract

The present invention relates to an optimum design method for preventing the condensation of an uninterruptible power supply by using a thermal analysis technique. The present invention relates to an optimum design method for preventing the condensation of an uninterruptible power supply by using a thermal analysis technique. To this end, the uninterruptible power supply is installed outside in extreme conditions (temperature range: -20 ~ 60 C, humidity range: 30 ~ 90%, altitude: 1000m above sea level). A phenomenon that condensation occurs inside due to a rapid change of temperature and humidity is understood though thermal flow analysis. Therefore, the generation of condensation can be prevented. A structure having an excellent insulation effect can be provided.

Description

TECHNICAL FIELD [0001] The present invention relates to an optimum design method for preventing condensation of an uninterruptible power supply using a thermal analysis technique. [0002]

The present invention relates to an optimal design method for preventing condensation of an uninterruptible power supply by using a thermal analysis technique, and more particularly, ) To prevent condensation from occurring due to sudden changes in temperature and humidity through the analysis of the heat flow and to obtain a structure having the best insulation effect. To an optimum design method for preventing condensation of an uninterruptible power supply.

The uninterruptible power supply (UPS) keeps the reliability of the load facility constantly in case of voltage and frequency fluctuation of the commercial power supply or reserve power supply and power failure in case of natural disasters such as earthquake and typhoon, It is a device that stably supplies stable AC power.

Such an uninterruptible power supply unit is installed in an indoor or outdoor environment to supply emergency power to an apparatus that operates through electricity such as a server, an air conditioner, and an elevator in the room.

In this case, when the uninterruptible power supply is installed in the room, it is presupposed that the power can be supplied without restriction to the surrounding environment by maintaining the constant temperature and humidity. However, when the sudden change of the room temperature occurs, Due to temperature and humidity, condensation may occur and electrical system problems may occur.

Even in the case of an uninterruptible power supply installed outside, even in an environment in which it is directly exposed to a variety of external temperature conditions, the conventional design does not take such a part into account, The original purpose of supplying power has not been achieved.

Accordingly, Korean Unexamined Patent Publication No. 10-2004-0044465 entitled "Battery cabinet for uninterruptible power supply unit"

The conventional technique is to stack and store a plurality of batteries in a body of a hexahedron so as to maintain a constant temperature state, and to adjust an internal temperature of the body through an air conditioner on the outside of the body.

However, this conventional technique does not solve the condensation problem through blocking the heat transfer. It controls the temperature by blowing the internal air through the blower, so that it is difficult to cope with the change in temperature and the efficiency is low.

Further, when installed outdoors, it is difficult to cope with the condensation phenomenon caused by a change in temperature, so that it is still vulnerable to the problem of power supply.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and an object of the present invention is to prevent condensation generated in an uninterruptible power supply by an extreme condition (temperature range, humidity range, elevation) The present invention provides an optimal design method for preventing condensation of an uninterruptible power supply by using a thermal analysis technique that prevents a malfunction or an overload of the internal equipment from occurring.

It is also possible to calculate the internal temperature according to the thickness and the material of the uninterruptible power supply by using the thermal analysis technique and to obtain the optimum insulation effect by calculating the condensation temperature point generated in the extreme condition (temperature range, humidity range, elevation) And an object of the present invention is to provide an optimum design method for preventing condensation of an uninterruptible power supply using a thermal analysis technique having a material.

Also, it provides an optimal design method for preventing condensation of uninterruptible power supply by using thermal analysis technique that calculates condensation temperature point and internal temperature by using atmospheric temperature and relative humidity of use point to prevent condensation and improve reliability I have to.

In order to accomplish the above object, there is provided a method of controlling the uninterruptible power supply apparatus for supplying commercial power and emergency power by using a thermal analysis technique for improving the adiabatic effect using the thermal analysis technique to prevent the occurrence of condensation, The collection step of collecting the monthly atmospheric temperature and the relative humidity of the use area,

Calculating a condensation temperature point and an internal temperature of the uninterruptible power supply through the atmospheric temperature and the relative humidity collected at the collecting step; A determination step of determining condensation occurrence by analyzing the condensation temperature point and the internal temperature calculated in the calculation step; If it is determined that the condensation is generated through the determination of the determination step, the thickness and material of the uninterruptible power supply are changed, and the internal temperature is re-calculated through the thermal analysis technique to detect the optimal thickness and material .

Wherein the calculating step includes a first generating step of generating a monthly condensation temperature point at which condensation occurs due to the atmospheric temperature and the relative humidity collected at the collecting step through a thermal analysis technique; A second generating step of generating a monthly internal temperature of the uninterruptible power supply according to the atmospheric temperature and the relative humidity, the set thickness and the material collected at the collecting step through a thermal analysis technique; And an analysis step of analyzing the monthly condensation temperature point of the first generation step and the average value of the monthly internal temperature of the second generation step.

It is preferable that the internal temperature of the uninterruptible power supply unit can be changed by the blowing unit that blows air inside and outside the uninterruptible power supply unit.

According to the optimum design method for preventing condensation of the uninterruptible power supply using the thermal analysis technique according to the present invention, the condensation temperature point occurring at the extreme condition outside the point of use is calculated by the thermal analysis technique, It is possible to determine the optimum thickness and material to prevent condensation by calculating the internal temperature using the thermal analysis technique under the extreme conditions of the power supply.

Further, it is possible to prevent a failure such as malfunction, overloading, etc. of internal equipment due to temperature and condensation.

In addition, it is possible to improve the reliability of the user by optimizing the design according to the external environment, and there is an advantage in cost and installation easiness.

FIG. 1 is a flowchart illustrating an optimum design method for preventing condensation of an uninterruptible power supply using a thermal analysis technique according to the present invention. FIG.
2 is a flow chart showing the calculation of the temperature state according to the present invention,
3 is a conceptual view showing a meshing state of a panel for performing thermal analysis according to the present invention;
4 is a conceptual view showing a thermal analysis by changing the thickness according to the present invention,
FIG. 5 is a conceptual view showing a thermal analysis by a blowing unit according to the present invention. FIG.

Hereinafter, an optimum design method for preventing condensation of an uninterruptible power supply using a thermal analysis technique according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart showing an optimum design method for preventing condensation of an uninterruptible power supply using a thermal analysis technique according to the present invention, FIG. 2 is a flowchart showing the calculation of a temperature state according to the present invention, FIG. 4 is a conceptual view showing a thermal analysis by changing the thickness according to the present invention, and FIG. 5 is a schematic view showing a heat- Fig.

As shown in FIGS. 1 and 2, the present invention relates to an optimum design method for preventing condensation of an uninterruptible power supply by using a thermal analysis technique. In an extreme condition (temperature range: -20 to 60.degree. C., 30 ~ 90%, elevation: 1000m above sea level) to prevent condensation from occurring due to sudden changes in temperature and humidity through heat flow analysis, The present invention relates to an optimum design method for preventing condensation of an uninterruptible power supply by using a thermal analysis technique which is configured to have a low power consumption.

In the present invention, the condensation temperature point according to the extreme condition and the temperature inside the uninterruptible power supply unit are detected through a thermal analysis technique to determine whether or not condensation has occurred, so as to determine the thickness and material of the optimum uninterruptible power supply unit (S10), a calculation step (S20), a judgment step (S30), and a detection step (S40).

The uninterruptible power supply (UPS) referred to in the present invention is designed to continuously operate the load equipment even in the case of voltage and frequency fluctuations and power outages of the commercial power supply or the standby power supply, against natural disasters such as earthquake and typhoon, It is a device that maintains reliability and stably supplies stable AC power.

First, the collecting step (S10) collects the monthly atmospheric temperature and the relative humidity of the use area of the uninterruptible power supply.

Here, the atmospheric temperature and the relative humidity are included in the extreme conditions and are measured as the elevation of the area.

In addition, the average temperature in Korea is based on the temperature range of -20 ~ 60 ℃, the humidity range of 30 ~ 90%, and the altitude: 1000m above sea level.

The calculating step S20 calculates the internal temperature of the uninterruptible power supply unit having the condensation temperature point and the set thickness and material through the atmospheric temperature and the relative humidity collected at the collecting step S10.

At this time, the calculating step S20 calculates the condensation temperature point and the internal temperature through the first generating step S21, the second generating step S22 and the analyzing step S223.

The first generation step (S21) generates a monthly condensation temperature point at which condensation occurs due to the atmospheric temperature and the relative humidity collected at the collection step (S10) through a thermal analysis technique.

The second generation step (S22) generates a monthly internal temperature of the uninterruptible power supply according to the atmospheric temperature and the relative humidity collected in the collecting step (S10) and the set thickness and material through a thermal analysis technique.

The analyzing step S23 analyzes the monthly condensation temperature point of the first generating step S21 and the average value of the monthly internal temperature of the second generating step S22.

The determining step S30 determines whether condensation has occurred by analyzing the condensation temperature point and the internal temperature calculated in the calculating step S20.

If it is determined in step S30 that the condensation has occurred, the detecting step S40 may change the thickness and material of the uninterruptible power supply to re-calculate the internal temperature through the thermal analysis technique, Thereby detecting the optimum thickness and material.

That is, the uninterruptible power supply unit calculates the condensation temperature point of the installation area through the atmospheric temperature and the relative humidity of the installation or installation site through the thermal analysis technique, and calculates the internal temperature of the uninterruptible power supply unit in the installation area through the thermal analysis technique It is possible to confirm whether or not condensation has occurred inside.

Accordingly, the optimum thickness and material to prevent condensation can be selected, various design changes can be made to prevent condensation through predicted data, and cost can be reduced by using necessary thickness and materials .

Also, even if exposed to various extreme conditions outdoors, internal temperature can be kept constant and condensation can be prevented, thereby preventing failure of internal facilities.

In the calculating step S20, an internal temperature that is changed by the blowing unit that blows air inside and outside of the uninterruptible power supply unit can be generated.

In other words, the uninterruptible power supply unit can measure the internal temperature changing by the blowing part that blows the air inside and outside at the selective position, and it can confirm the occurrence of condensation inside in comparison with the condensation temperature point, have.

[Example 1]

Hereinafter, the thermal analysis technique according to the present invention will be described with reference to FIGS. 3 to 6. FIG.

As shown in FIG. 3, thermal analysis was performed using the meshing state of the uninterruptible power supply.

1. Uninterruptible Power Supply (UPS) internal temperature profile

1) Temperature changes including extreme conditions

When the thickness is 2 mm, the atmospheric temperature is analyzed at intervals of 10 ° C from -20 to 60 ° C. To obtain accurate data, the number of iterations is set to 500 .

External temperature UPS internal temperature (℃) Minimum temperature Maximum temperature -20 ° C -23.029 69.152 -10 ° C -12.524 69.214 0 ℃ -2.019 69.276 10 ℃ 8.485 69.339 20 ℃ 18.990 69.401 30 ℃ 29.495 69.463 40 ℃ 30.285 69.526 50 ℃ 30.380 69.588 60 ° C 30.397 69.683

As shown in Table 1, the internal temperature of the uninterruptible power supply maintains a constant temperature range within a range of 69 ° C although the minimum temperature varies according to changes in external temperature.

The minimum temperature varies with the external temperature, but the temperature change rapidly decreases at a temperature of 40 ° C or higher and is maintained at 30 ° C.

2) Based on national average monthly temperature

The average temperature of Korea was calculated and the temperature range of -20 ~ 60 ℃, which is the initial criterion, was verified and the temperature change of the uninterruptible power supply was measured through the thermal analysis technique according to the set standards.

month External temperature (℃)  Internal temperature of UPS (℃) Minimum temperature Maximum temperature One Minimum temperature (-6.8) -9.163 69.234 Highest temperature (3.20) 1.342 69.296 Average temperature (-2.1) -4.225 69.263 2 Minimum temperature (-4.2) -6.431 69.250 Maximum temperature (5.80) 4.073 69.313 Average temperature (0.70) -1,284 69.281 3 Minimum temperature (0.20) -1.809 69.278 Maximum temperature (13.5) 12.162 69.361 Average temperature (6.60) 4.914 69.318 4 Minimum temperature (4.40) 2.603 69.304 Maximum temperature (16.4) 15.209 69.379 Average temperature (10.3) 8.801 69.341 5 Minimum temperature (12.1) 10.691 69.352 Maximum temperature (24.1) 23.297 69.427 Average temperature (17.8) 16.679 69.387 6 Minimum temperature (18.6) 17.520 69.392 Highest temperature (27.7) 27.079 69.449 Average temperature (22.6) 21.722 69.417 7 Minimum temperature (23.2) 22.352 69.421 Maximum temperature (30.2) 29.705 69.465 Average temperature (26.3) 25.608 69.440 8 Minimum temperature (23.4) 22.562 69.422 Maximum temperature (32.3) 30.090 69.478 Average temperature (27.3) 26.659 69.447 9 Minimum temperature (17.0) 15.839 69.382 Maximum temperature (26.4) 25.713 69.441 Average temperature (21.2) 20.251 69.409 10 Minimum temperature (10.3) 8.801 69.341 Maximum temperature (21.7) 20.776 69.412 Average temperature (15.4) 14.158 69.372 11 Minimum temperature (2.40) 0.502 69.291 Maximum temperature (12.6) 11.217 69.355 Average temperature (7.10) 5.439 69.321 12 Minimum temperature (-2.9) -5.066 69.258 Maximum temperature (6.40) 4.704 69.316 Average temperature (1.50) -0.444 69.286

As shown in [Table 2], the monthly temperature in Korea belongs to the set range. In this case, the temperature range of the uninterruptible power supply unit is within the range of -9 ° C to 30 ° C, Lt; RTI ID = 0.0 > 69 C. < / RTI >

3) Analysis result of uninterruptible power supply

The internal heat flow of the uninterruptible power supply is analyzed using ANSYS CFD, and the results are shown in Table 1 and Table 2 as the minimum and maximum values of the internal temperature. As can be seen from [Table 1] and [Table 2], the minimum temperature value is changed due to the effect of external temperature, but the maximum temperature value is almost maintained. This is because the heating temperature of the T / R parts is always higher than the external temperature, and the maximum temperature value seems to be maintained at 70 ° C with almost no variation.

 An important point to note here is the lowest temperature inside the UPS. This is because the internal minimum temperature is a measure of whether condensation inside the UPS is present. In the interpretation based on the national average monthly temperature, the lowest value of internal minimum temperature is -9.163 ℃ and the maximum value is 30.09 ℃. In the interpretation based on temperature including extreme conditions, the lowest value of internal minimum temperature is -23.029 ℃, The value is shown as 30.397 캜.

2. Check condensation temperature point phenomenon

1) Before judging whether or not condensation is present, there should be data to judge whether or not condensation has occurred.

Relative humidity
(%) Ambient temperature (℃) -5 0 5 10 15 20 25 30 35 40 90 -6.5 -1.3 3.5 8.2 13.3 18.3 23.2 28.0 33.0 38.2 85 -7.2 -2.0 2.3 7.3 12.5 17.4 22.1 27.0 32.0 37.1 80 -7.7 -2.8 1.9 6.5 11.6 16.5 21.0 25.9 31.0 36.2 75 -8.4 -3.6 0.9 5.6 10.4 15.4 19.0 24.7 29.6 34.5 70 -9.2 -4.5 0.2 4.5 9.1 14.2 18.6 23.3 28.1 33.5 65 -10.0 -5.4 -1.0 3.3 8.0 13.0 17.4 22.0 26.8 32.0 60 -10.8 -6.5 -2.1 2.3 6.7 11.9 16.2 20.6 25.3 30.5 55 -11.6 -7.4 -3.2 1.0 5.6 10.4 14.8 19.1 23.9 38.9 50 -12.8 -8.4 -4.4 -0.3 4.1 8.6 13.3 17.5 22.2 27.1 45 -14.3 -9.6 -5.7 -1.5 2.6 7.0 11.7 16.0 20.2 25.2 40 -15.9 -10.8 -7.3 -3.1 0.9 5.4 9.5 14.0 18.2 23.0 35 -17.5 -12.1 -8.6 -4.7 -0.8 3.4 7.4 12.0 16.1 20.6 30 -19.0 -14.3 -10.2 -6.9 -2.9 1.3 5.2 9.2 13.7 18.0

As shown in Table 3, the condensation temperature table is a chart showing the condensation temperature point at which the atmospheric temperature and the relative humidity occur at which temperature.

For example, when the ambient temperature is 20 ° C and the relative humidity is 55%, a dew point occurs at a temperature of 10.4 ° C. That is, condensation occurs.

2) Condensation phenomenon

(1) National Average Monthly Temperature

The monthly air temperature and the UPS internal temperature are measured, but the relative humidity is different from one observation point to another and varies depending on the surrounding environment.

Therefore, in this paper, it is difficult to make all regions of the country.

In addition, the atmospheric temperature and the relative humidity were taken as an average value, and the dew point temperature was taken as an approximate value.

area month Relative humidity
(%) Temperature (℃) Condensation
Whether Ambient temperature Dew point temperature Internal temperature Seoul One 57 -2.1 -8.66 -9.16 ○ 2 54 0.7 -6.69 -6.43 × 3 49 6.6 -2.96 -1.81 × 4 54 10.3 1.41 2.60 × 5 58 17.8 9.44 10.69 × 6 60 22.6 14.45 17.52 × 7 79 26.3 22.37 22.35 ○ 8 69 27.3 21.11 22.56 × 9 63 21.2 13.88 15.84 × 10 59 15.4 7.44 8.80 × 11 58 7.1 -0.53 0.50 × 12 60 1.5 -4.80 -5.07 ○ Daejeon One 74 -2.1 -5.65 -9.16 ○ 2 63 0.7 -4.90 -6.43 ○ 3 57 6.6 -1.15 -1.81 ○ 4 62 10.3 3.35 2.60 ○ 5 68 17.8 11.82 10.69 ○ 6 76 22.6 18.16 17.52 ○ 7 85 26.3 23.58 22.35 ○ 8 82 27.3 23.96 22.56 ○ 9 81 21.2 17.81 15.84 ○ 10 78 15.4 11.59 8.80 ○ 11 76 7.1 3.16 0.50 ○ 12 76 1.5 -2.0 -5.07 ○ Busan One 42 -2.1 -12.09 -9.16 × 2 43 0.7 -9.3 -6.43 × 3 53 6.6 -2.02 -1.81 × 4 50 10.3 0.34 2.60 × 5 61 17.8 10.19 10.69 × 6 74 22.6 17.73 17.52 ○ 7 76 26.3 21.73 22.35 × 8 67 27.3 20.64 22.56 × 9 61 21.2 13.39 15.84 × 10 56 15.4 6.68 8.80 × 11 52 7.1 -1.84 0.50 × 12 48 1.5 -7.39 -5.07 × Jeju One 70 -2.1 -6.3 -9.16 ○ 2 71 0.7 -3.5 -6.43 ○ 3 71 6.6 1.72 -1.81 ○ 4 66 10.3 4.23 2.60 ○ 5 78 17.8 13.92 10.69 ○ 6 91 22.6 21.06 17.52 ○ 7 92 26.3 24.89 22.35 ○ 8 74 27.3 22.26 22.56 × 9 74 21.2 16.38 15.84 ○ 10 72 15.4 10.38 8.80 ○ 11 65 7.1 0.97 0.50 ○ 12 61 1.5 -4.61 -5.07 ○

As shown in [Table 4], no condensation was observed in Seoul and Busan in general, and almost condensation was observed in Daejeon and Jeju area. In addition, the temperature difference was 3.54 ° C at the maximum and 0.02 ° C at the minimum.

 The results show that, in contrast to the relatively warm Pusan, the other regions show condensation in winter, which is the lowest temperature, and the Jeju region is an island type, so the relative humidity is much higher than other regions. In the case of dew condensation that occurs every month, there is an average difference of about 1.4 ° C except for winter January and December.

(2) Temperature criterion including extreme conditions

We measured the internal temperature of the UPS according to the extreme conditions (-20 ~ 60 ℃). We changed the relative humidity from 30% to 90% by 5%, and confirmed the dew point temperature and dew condensation.

Ambient temperature
(° C) Relative humidity
(%) Dew point temperature
(° C) Internal temperature
(° C) Condensation
Whether -20 30 -31.95 -23.029 × 35 -30.48 × 40 -29.20 × 45 -28.05 × 50 -27.02 × 55 -26.08 × 60 -25.21 × 65 -24.41 × 70 -23.66 × 75 -22.96 ○ 80 -22.30 ○ 85 -21.68 ○ 90 -21.09 ○ -10 30 -22.89 -12.524 × 35 -21.31 × 40 -19.93 × 45 -18.69 × 50 -17.58 × 55 -16.56 × 60 -15.63 × 65 -14.76 × 70 -13.96 × 75 -13.20 × 80 -12.49 ○ 85 -11.82 ○ 90 -11.18 ○ 0 30 -14.3 -2.019 × 35 -12.1 × 40 -10.8 × 45 -9.6 × 50 -8.4 × 55 -7.4 × 60 -6.5 × 65 -5.4 × 70 -4.5 × 75 -3.6 × 80 -2.8 × 85 -2.0 ○ 90 -1.3 ○ 10 30 -6.9 8.485 × 35 -4.7 × 40 -3.1 × 45 -1.5 × 50 -0.3 × 55 1.0 × 60 2.3 × 65 3.3 × 70 4.5 × 75 5.6 × 80 6.5 × 85 7.3 × 90 8.2 × 20 30 1.3 18.990 × 35 3.4 × 40 5.4 × 45 7.0 × 50 8.6 × 55 10.4 × 60 11.9 × 65 13.0 × 70 14.2 × 75 15.4 × 80 16.5 × 85 17.4 × 90 18.3 × 30 30 9.2 29.495 × 35 12.0 × 40 14.0 × 45 16.0 × 50 17.5 × 55 19.1 × 60 20.6 × 65 22.0 × 70 23.3 × 75 24.7 × 80 25.9 × 85 27.0 × 90 28.0 × 40 30 18.0 30.285 × 35 20.6 × 40 23.0 × 45 25.2 × 50 27.1 × 55 38.9 ○ 60 30.5 ○ 65 32.0 ○ 70 33.5 ○ 75 34.5 ○ 80 36.2 ○ 85 37.1 ○ 90 38.2 ○ 50 30 27.65 30.380 × 35 30.31 × 40 32.66 ○ 45 34.77 ○ 50 36.69 ○ 55 38.44 ○ 60 40.07 ○ 65 41.58 ○ 70 42.99 ○ 75 44.32 ○ 80 45.57 ○ 85 46.76 ○ 90 47.89 ○ 60 30 36.11 30.397 ○ 35 38.95 ○ 40 41.46 ○ 45 43.71 ○ 50 45.75 ○ 55 47.63 ○ 60 49.37 ○ 65 50.98 ○ 70 52.49 ○ 75 53.91 ○ 80 55.26 ○ 85 56.53 ○ 90 57.74 ○

As shown in Table 5, when the ambient temperature is -20 ° C, the relative humidity is 75% or more, -10 ° C is 80% or more, 0 ° C is 85% If the temperature is more than 40% at 60 ℃ and more than 30% at 60 ℃, the result of condensation appears.

That is, the higher the relative humidity at the same temperature, and the higher the temperature at the same relative humidity, the more the condensation occurs.

 Analysis of the results shows that when the atmospheric temperature goes up to 30 ° C or more, the temperature rise inside the UPS decreases significantly, and it is staying at 30 ° C. In other words, when the ambient temperature is low, condensation occurs when the relative humidity is considerably high. However, when the temperature rises to a high temperature, the internal temperature of the UPS does not rise above 30 ° C.

3. Anti-condensation measures

1) Based on the national average monthly temperature in Korea

As a result of the above results, it was confirmed that the condensation phenomenon occurs frequently in Daejeon area. The Daejeon area is experiencing condensation with an average difference of 1.4 ℃ except January and February in winter. As a result, we have been able to increase the UPS internal temperature by about 1.5 ℃ based on Daejeon.

(1) Change in the internal temperature by changing the thickness of the uninterruptible power supply

4 (a) shows the changed thickness of the uninterruptible power supply, and (b) shows the variation according to the thermal analysis according to the changed thickness of the uninterruptible power supply.

The thickness of the uninterruptible power supply was made thicker so that more insulation with the outside air occurred. The thickness of the existing uninterruptible power supply was changed from 2 mm to 4 mm as shown in Fig. 4 (a).

As shown in FIG. 4, when the thickness of the uninterruptible power supply was changed from 2 mm to 4 mm, there was a slight increase in temperature as a whole as shown in FIG. 4 (b). In September, when the gap was bigger in Daejeon, the temperature of the inside air of the uninterruptible power supply was 16.93 ℃, which was about 1.1 ℃ higher than 15.84 ℃.

This does not reach the target temperature of 1.5 ° C, but you can see how the internal air temperature changes as you change the thickness of the UPS enclosure.

(2) Internal temperature change by blowing part

5 (a) is a state in which an air blowing unit is further included in the uninterruptible power supply, and FIG. 5 (b) is a conceptual diagram showing a change in thermal analysis of the uninterruptible power supply unit in which the air blowing unit is formed.

The existing uninterruptible power supply has a structure that is not easily ventilated with outside air. I tried to change the existing UPS specification in consideration of the case where the outside air and ventilation are not good and condensation occurs. As shown in FIG. 5 (a), a fan having a diameter of 80 mm and a thickness of 30 mm was provided on the back surface of the uninterruptible power supply.

Therefore, as shown in Fig. 5 (b), there was a lot of temperature increase as a whole. As a result of analyzing the average ambient temperature of September, the temperature of the inside air of the uninterruptible power supply is 15.84 ° C, which is about 20.024 ° C, which is about 4 ° C higher.

Because of the fan formed in the uninterrupted garden supply device, it seems that the warm air inside the inside gets into the inside, the temperature of the inside air rises, and the warm air inside the uninterrupted garden supply device is circulated and ventilated.

Such a phenomenon is expected to have different results when the outside temperature such as winter is extremely low.

Therefore, when the internal temperature of the uninterruptible power supply increases by about 4 ° C overall, no condensation occurs at an external temperature of -20 ° C to 30 ° C. When the external temperature is 40 ° C, the relative humidity is 55% and 70% Or more at 50 ° C, and 45% or more at 50 ° C, and at 60 ° C at all relative humidity.

 As a result of the above results, when the atmospheric temperature is low, condensation occurs when the relative humidity is high. However, when the temperature rises to a high temperature, the internal temperature of the UPS does not rise above 30 ° C. Therefore, the relative humidity inside the UPS can be lowered or the internal temperature can be maintained at 0 ~ 30 ° C to prevent internal condensation in the UPS.

As shown in [Example 1] above, when the ambient temperature is low, condensation occurs when the relative humidity is considerably high. However, as the temperature rises to a high temperature, the internal temperature of the uninterruptible power supply does not rise by more than 30 ° C, see.

Therefore, the relative humidity inside the uninterruptible power supply can be lowered, or the internal temperature can be maintained at 0 to 30 ° C to prevent condensation inside the uninterruptible power supply.

For this purpose, the material and the thickness of the uninterruptible power supply are changed to improve the insulation effect, so that the optimum design can be achieved to maintain the internal temperature at a temperature at which no condensation occurs.

In addition, it is possible to prevent condensation from occurring in the inside of a region where a temperature change is severe through an air blowing portion for blowing air inside and outside.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It is obvious that you can do it.

Claims (3)

An optimal design method for preventing condensation in uninterruptible power supply by using thermal analysis technique to prevent condensation by improving thermal insulation effect by using thermal analysis technique for uninterruptible power supply supplying commercial power and emergency power ,
Collecting step (S10) for collecting monthly atmospheric temperature and relative humidity of the use area;
A calculating step (S20) of calculating a condensation temperature point and an internal temperature of the uninterruptible power supply through the atmospheric temperature and the relative humidity collected in the collecting step (S10);
A determining step (S30) of determining condensation occurrence by analyzing the condensation temperature point and the internal temperature calculated in the calculating step (S20);
If it is determined in step S30 that condensation has occurred, the thickness and the material of the uninterruptible power supply are changed and the internal temperature is re-calculated through the thermal analysis technique to detect the optimum thickness and material free from condensation (S40)
The calculating step (S20)
A first generating step (S21) of generating a monthly condensation temperature point at which condensation occurs due to the atmospheric temperature and the relative humidity collected at the collecting step (S10) through a thermal analysis technique;
A second generating step (S22) of generating a monthly internal temperature of the uninterruptible power supply according to the atmospheric temperature and the relative humidity collected in the collecting step (S10) and the set thickness and material through a thermal analysis technique;
And an analyzing step (S23) of analyzing the monthly condensation temperature point of the first generating step (S21) and the average value of the monthly internal temperature of the second generating step (S22). The analyzing step (S23) Optimal Design Method for Preventing Condensation of Supply System.
delete The method according to claim 1,
The internal temperature of the uninterruptible power supply unit can be changed by the blowing unit that blows the air inside and outside the uninterruptible power supply unit in the calculating step S20. Optimal Design Method for.

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