Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
  • H02B1/56—Cooling; Ventilation
  • H02B1/565—Cooling; Ventilation for cabinets
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks

Definitions

• the present invention relates to a method for temperature control of a control cabinet for medium and high voltage switching devices, the method being particularly energy-efficient.
• the present invention also relates to a system for temperature control of a control cabinet for medium and high-voltage switching devices, which allows such a method.
• Switchgear for isolating currents are widely known.
• the arrangement of switching modules in medium and high voltage switchgear, for example, can be done in very different ways. It is known that such switchgear assemblies are assigned control cabinets which are used to control the switchgear assemblies.
• a method for temperature control of a first control cabinet for medium or high-voltage switchgear devices is described, the first control cabinet including an anti-condensation heater to prevent condensation of humidity on components located in the inner volume of the first control cabinet, the method having at least the following method steps : a) determining the humidity of the atmosphere in the interior volume of the first control cabinet; b) determining the temperature of the atmosphere in the inner volume of the first control cabinet; c) determining the dew point temperature of the atmosphere in the inner volume of the first control cabinet based on the humidity and the temperature of the atmosphere in the inner volume of the first control cabinet; d) determining the component temperature of at least one part located in the inner volume of the first control cabinet construction; and e) creating a control command for activating the anti-condensation heater based on a comparison of the component temperature determined in process step d) and the dew point temperature determined in process step c).
• Such a method allows switching cabinets to be heated in a simple and efficient manner to prevent or at least reduce condensation of humidity on
• the method described thus serves to control the temperature of a first control cabinet, the control cabinet being assigned to a medium-voltage switchgear or a medium-voltage switchgear or a high-voltage switchgear or a high-voltage switchgear.
• switchgear or switchgear are known per se and include, for example, power and / or disconnectors. As a rule, they are systems in which electrical energy is distributed or converted.
• a medium-voltage switching device is also to be understood in particular as one in which voltages are switched or disconnected which are approximately in a range from 1 kV to approximately 60 kV.
• a high-voltage switching device is to be understood as one in which voltages are switched or separated which are in a range of over approximately 60 kV up to 1000 kV or even higher, for example up to 1150 kV.
• Auxiliary contacts are usually provided in the control cabinet or in the control cabinets of such switchgear, which reflect the status of the main contacts of the switchgear.
• control electronics for the switchgear can be provided in the control cabinet.
• control cabinet includes an anti-condensation heater to prevent condensation of humidity on components located in the inner volume of the first control cabinet.
• the method described here has at least the following method steps.
• the humidity of the atmosphere in the inner volume of the first control cabinet that is to say in particular the humidity of the air in the control cabinet.
• detection of the air humidity in the atmosphere, in particular in the air, within the control cabinet and thus in particular within a housing of the control cabinet is thus carried out using an appropriate sensor.
• This step can be implemented, for example, with one or more conventional sensors for determining the air humidity inside or outside the control cabinet.
• the temperature of the atmosphere in the inner volume of the first control cabinet is determined, in other words the air temperature of the air in the control cabinet.
• a detection of the temperature in the atmosphere or in the air inside the control cabinet and thus in particular within a housing of the control cabinet is carried out.
• the method comprises the step of determining the dew point temperature of the atmosphere, such as the air, in the inner volume of the first control cabinet based on the humidity and the temperature of the atmosphere in the inner volume of the first control cabinet.
• This step is based on the fact that the dew point temperature can be determined solely through the previously determined parameters, namely the humidity and the temperature of the atmosphere or the air within the control cabinet.
• the dew point temperature is to be understood in a manner known per se as the temperature of the air which must be fallen below at constant pressure so that water vapor can separate out as dew or mist or, in other words, that humidity can condense on components inside the control cabinet if the component temperature falls below the dew point temperature.
• the relative humidity is 100% and the air is just saturated with water vapor.
• the method further comprises determining the component temperature at least one located in the inner volume of the first control cabinet. borrowed component.
• This can be implemented, for example, with one sensor or with a plurality of sensors, it also being possible for several sensors to be provided on different components, for example on different components with different weights.
• This step can in turn be implemented, for example, with one or more conventional sensors for determining the temperature, in particular thermometers, arranged inside or outside the control cabinet.
• the component or components, the component temperature of which is determined can, for example, be components in which condensation of air humidity, in particular with regard to corrosion, is particularly critical. Thus, special components are particularly important here, which have exposed, corrosion-sensitive areas.
• At least one, for example all of the method steps a), b) and d) is carried out with sensors arranged in the interior volume of the control cabinet.
• determining the humidity of the atmosphere in the inner volume of the first control cabinet determining the temperature of the atmosphere in the inner volume of the first control cabinet and determining the component temperature of at least one component located in the inner volume of the first control cabinet by means of Depending on the specific sensors, for example inside the control cabinet, these parameters can also be determined by approximation or estimation. It can be assumed that the temperature of the atmosphere inside the control cabinet and the component temperature are approximately the same as the temperature of the air surrounding the control cabinet, since the control cabinets are usually not airtight or are completely thermally insulated from the outside. In the same way, the humidity of the air surrounding the control cabinet can be influenced by the humidity of the atmosphere. Close the sphere in the control cabinet. Thus, the process steps a) b) and d) can also be implemented by recording weather data showing the temperature and relative humidity.
• Exemplary critical components include in no way restrictive electrical contacts in auxiliary switches, SF 6 density monitors, oil pressure switches, relays or contactors.
• Alternative critical components are also those in which corrosion is not necessarily a problem, but rather preventing the bridging of insulation distances is important.
• other critical components can be plugs or strips that could become conductive due to condensation.
• method step e) comprises creating and in particular executing a control command for controlling the anti-condensation heater based on a comparison of the component temperature determined in method step d) and the dew point temperature determined in method step c).
• the anti-condensation heater is controlled or activated based on a combination of the parameters component temperature, atmospheric temperature within the control cabinet and humidity of the atmosphere within the control cabinet and thus in particular the dew point temperature.
• the anti-condensation heaters are independent of the actual climatic conditions. conditions and thus works particularly continuously in continuous operation regardless of the dew point temperature.
• controlled heaters are used in medium-voltage applications, for example, they only work with physical parameters of the control cabinet interior air, such as temperature or humidity. However, these parameters alone do not fully grasp the problem of condensation on the critical components.
• the anti-condensation heater can only be controlled with improved efficiency in the method described here.
• the method can thus be based on the fact that if the component temperature is higher than the dew point temperature, condensation will not take place or, in other words, that condensation will take place when the component temperature is below the dew point temperature.
• both the dew point temperature is determined and thereby a condition is determined in which condensation of the air humidity takes place, and it is also determined whether this condition is in one or more components also really exists.
• the process described here allows the anticonvulsant to be heated as required. condensation heating of the control cabinet, which means that permanent operation of the anti-condensation heating can be dispensed with.
• the anti-condensation heaters work with lower energy consumption and thus cause a significantly reduced burden on the environment.
• the carbon dioxide pollution for the environment can be significantly reduced compared to solutions with permanently working anti-condensation heaters.
• the method described here makes it possible for the operational safety of the control cabinet to be improved. Because with permanent operation of the anti-condensation heater, the risk of an error state, which can also be critical to safety, is significantly increased compared to the method described here.
• the reliability of the anti-condensation heater can also be improved, which makes service intervals less critical and can also reduce downtimes.
• a safe and, above all, energy-efficient control is achieved through the control of the anti-condensation heaters, which is adapted to the actual physical requirements. This control is based on the state variables of the control cabinet interior atmosphere or the control cabinet interior air and the critical components which are relevant to the physical climate and which only together precisely describe the conditions for possible condensation.
• the physical size of the dew point is used to create a control variable as a parameter in comparison with the temperatures of critical components inside the control cabinets, which enables safe and energy-efficient control of the anti-condensation heating.
• the output of the anti-condensation heater is reduced if the component temperature determined in process step d) is greater than the dew point temperature determined in process step c).
• the anti-condensation heating is switched off if the component temperature determined in method step d) is greater than the dew point temperature determined in method step c).
• the anti-condensation heater works in a basic state and thus heats the components within the control cabinet and only when this is indicated by the control command, the heating power is reduced, such as the heating is exhibited entirely.
• This embodiment allows the method described here to be carried out in a particularly effective and safe manner. On the one hand, whenever this is indicated or permitted, the heating output can be reduced to the point where the heating is switched off, which can significantly reduce energy consumption, as described above. In addition, it is ensured that, for example, in the event of a fault in a control unit or if there are no control commands, the anti-condensation heating works, preventing condensation of air humidity and consequently corrosion of components inside the control cabinet.
• the output of the anti-condensation heater is reduced if the component temperature determined in process step d) is greater than the dew point temperature determined in process step c), the comparison determined in process step d) Component temperature and the dew point temperature determined in process step c), a safety parameter is taken into account.
• a basic state of the anti-condensation heater is thus provided, as described above, in which it is active and the heating power is reduced based on a control command, for example the heating is switched off.
• a safety parameter is taken into account when comparing the dew point temperature and the component temperature.
• the control command to reduce the heating power of the anti-condensation heater is output when the component temperature minus the safety parame ter is still greater than the dew point temperature.
• a safety parameter must be present as a specific temperature range in order to issue the control command and to control the anti-condensation heater.
• the safety parameter can be a factor or a defined temperature range, for example.
• This refinement enables the heating power to be reduced only if this can also be made possible in a particularly reliable manner. This makes it particularly effective to ensure that corrosion of the components located in the control cabinet or, for example, the deterioration of an insulation section is prevented, since it prevents or the system Fahr can at least be significantly reduced that the heating power is reduced, although this would not be indicated due to the climate prevailing in the control cabinet.
• the safety parameter can be advantageous, for example, if the corresponding parameters are not explicitly measured but are estimated or approximated, for example using weather data as described above.
• the safety parameter it can be provided that it is based on at least one of the type and design of the component whose component temperature it was averaged.
• These parameters in particular can influence the temperature.
• the type of component i.e. which component or what type of component it is, can provide information on the material, size and criticality of corrosion or other influence from condensation, for example.
• an indication can be given that a faulty state requires an expensive replacement or causes a safety-critical state.
• the design of the component such as how or from which materials the construction part is made or designed, can also provide an indication of the material and size of the component for the specific design of a certain type of component.
• the material and the size can have an influence on the heat capacity and thus an indication of the temperature of the component after a temperature change, for example.
• these parameters can give an indication of the susceptibility to corrosion.
• the safety parameters can therefore be selected to be particularly large if corrosion of the component in the event of condensation is likely and would have serious consequences.
• method step d) the determination of the component temperature at least two in the internal volume of the control cabinet of the components located and that in method step e) the control command is based on a comparison of all the determined component temperatures and the dew point temperature.
• redundancy is made possible with regard to the component temperature and / or that the different behavior with regard to the temperature is taken into account for different components. This further prevents the risk of incorrect control. Because it can now be allowed that the control command is only issued if the corresponding condition, such as a higher component temperature compared to the dew point temperature, applies to both components.
• control command is only used to control the anti-condensation heater of the first control cabinet.
• temperature control of the anti-condensation heating for each of the control cabinets follows in an autonomous manner. This refinement allows the method to be carried out with a particularly high degree of accuracy. Because it becomes possible that the control of the anti-condensation heating can be based on the conditions immediately prevailing in the control cabinet.
• This refinement can thus be implemented particularly preferably when a control command is generated by a local control unit assigned only to the first control cabinet.
• the control unit can for example be arranged in the control cabinet.
• this design can device can in turn be carried out advantageously using appropriate sensors inside the control cabinet.
• control command may equally be possible for the control command to be used to control the anti-condensation heater of the first control cabinet and additionally to control an anti-condensation heater of at least one second control cabinet.
• the sensor system for controlling a plurality of condensation heaters can be significantly reduced, since a plurality of anti-condensation heaters can be controlled on a reduced number of measurements or estimates or approximations. This can be based, for example, on the fact that it can be assumed that the climatic conditions of control cabinets arranged next to one another will be similar. Under this condition, the control command he issued can be used for other control cabinets.
• the component temperature determined for the first control cabinet and the dew point temperature determined for the first control cabinet are used to provide a control command to control the anti-condensation heating of the second control cabinet.
• control command is carried out by a central control unit which receives data for a plurality of switch cabinets and creates the control command based on data for a plurality of switch cabinets.
• method steps a) to d) are carried out for a plurality of control cabinets, for example using appropriate sensors or corresponding approximations or assumptions, which makes it possible to determine component temperatures and dew point temperatures for a plurality of control cabinets.
• These data can then be evaluated by the central control unit. Accordingly, the control command can be established on the plurality of data as described above.
• the peripherals that are to be provided in the control cabinets can be reduced, since a control unit or control units can be dispensed with.
• the sensor data can be recorded for part of a group of control cabinets, for example, and the control command can be extended to all control cabinets.
• control command can be based on a large number of independently collected data, which can make the method particularly reliable.
• control command takes place outside the control cabinet, taking climatic conditions into account.
• a temperature and / or solar radiation or a degree of cloudiness can be used that occurs or is present outside the control cabinet.
• the method can be carried out particularly reliably and efficiently.
• steps a), b) and d) can take place only or in addition, taking into account climatic conditions outside the control cabinet.
• the creation of the control command takes place using an artificial intelligence method.
• the method can be carried out using a neural network.
• the method can be carried out particularly precisely and in an adaptable manner. For example, the dependence of temperature fluctuations in the atmosphere inside the control cabinet on the component temperature can be recorded and evaluated. For example, it can be predicted how the component temperature will change based on temperature fluctuations in order to control the anti-condensation heating particularly reliably. Furthermore, parameters such as climatic conditions outside the control cabinet can be taken into account and included in the evaluation in a particularly reliable manner.
• the present invention also relates to a system for temperature control of a first control cabinet for medium and high-voltage switching devices, for example for power switches and / or disconnectors, the first control cabinet having an anti-condensation heater to prevent condensation of humidity in the inner volume of the first Control cabinet, the control assembly comprising at least: a sensor for detecting the humidity of the atmosphere in the interior volume of the first control cabinet; a sensor for detecting the temperature of the atmosphere in the internal volume of the first control cabinet; a sensor for determining the component temperature of at least one component located in the inner volume of the first control cabinet; and a control unit, wherein the control unit is configured to determine the dew point temperature of the atmosphere in the inner volume of the first control cabinet based on the humidity and the temperature of the atmosphere in the inner volume of the first control cabinet, and to create a control command in particular to forward the anti-condensation heater to control the anti-condensation heater based on a comparison of the temperature of the at least one component located in the inner volume of the first control cabinet and the
• Such a system is used in particular to carry out a method as described in detail above.
• a system described here allows in an effective and safe way, in particular for the reasons mentioned above, to prevent condensation on components within a control cabinet for medium or high-voltage applications. change or at least significantly reduce.
• a particularly environmentally friendly and sustainable solution can be created that can also enable particularly long-term stable operation.
• Different sensors can be used to determine the humidity of the atmosphere in the inner volume of the first control cabinet, to determine the temperature of the atmosphere in the inner volume of the first control cabinet and to determine the component temperature of at least one component located in the inner volume of the first control cabinet be provided, or provided sensors can determine several parameters. The latter is possible, for example, if the determination of the parameters is carried out, for example, on the basis of climatic conditions that exist outside the control cabinet and that the assumptions or approximations described in detail above are made.
• control unit is arranged in the control cabinet. This allows in particular an autonomous control of an anti-condensation heater of the control cabinet.
• control command it is possible for the control command to be used only to control the anti-condensation heater of the first control cabinet. It is also possible for a control command to be generated by a local control unit assigned only to the first control cabinet.
• control unit is arranged separately from the control cabinet and can be connected to the sensors via a wireless connection for data transfer.
• control command it is possible for the control command to be used for controlling the anti-condensation heater of the first control cabinet and additionally for controlling an anti-condensation heater of at least one second control cabinet.
• component temperature determined for the first control cabinet and the dew point temperature determined for the first control cabinet are used to provide a control command for controlling the anti-condensation heating of the second control cabinet.
• a control command is created by a central control unit which receives data for a plurality of switch cabinets and creates the control command based on data for a plurality of switch cabinets.
• control unit can be connected to at least one condensation heater arranged in a control cabinet for data transfer.
• data connection that can be established can take place via a cable-based data line or also wirelessly.
• FIG. 1 schematically shows a system for temperature control of a control cabinet in a first embodiment
• FIG. 2 schematically shows a system for temperature control of a control cabinet in a further embodiment
• Fig. 3 is a diagram showing the relationship between the dew point of the humidity and the air tempera ture
• Fig. 4 is a diagram showing the relationship between the prevailing climatic conditions and the component temperature
• Fig. 6 is a diagram showing the scope of the method according to the invention.
• control cabinet 10 In the figure 1, an embodiment of a system for temperature control of a control cabinet 10 is shown.
• the control cabinet 10 is used to control medium and high-voltage switching devices.
• the control cabinet 10 includes an anti-condensation heater 12 to prevent condensation of humidity on components 16 located in the inner volume 14 of the control cabinet 10. of the control cabinet 10 is shown.
• Such components 16 can be susceptible to corrosion, for example, so that condensation which promotes corrosion should be prevented.
• the system allows advantageous temperature control of the control cabinet 10, in particular by advantageously activating the anti-condensation heater 12.
• the system comprises a sensor 18 for determining the humidity of the atmosphere in the inner volume 14 of the control cabinet 10.
• This sensor 18 can be a known humidity sensor and is expediently, but not limited to, arranged inside the control cabinet 10.
• the system further comprises a sensor 20 for determining the temperature of the atmosphere in the inner volume 14 of the control cabinet 10.
• Such a sensor 20 can in turn be configured in a manner known per se and is expediently but not limited to it likewise inside the control cabinet 10 arranged.
• the system comprises a sensor 22 for determining the component temperature of at least one component 16 located in the inner volume of the first control cabinet 10.
• a sensor 22 for determining the component temperature of at least one component 16 located in the inner volume of the first control cabinet 10.
• Such a sensor 22 can in turn be configured in a manner known per se and is expediently but not restricted to this also inside of the control cabinet 10 and more precisely on a component 16.
• a control unit 24 is also provided.
• the control unit 24 is connected by data connections to the sensors 18, 20, 22 and also to the anti-condensation heater 12 and can thus control the anti-condensation heater 12 based on the sensor data obtained.
• the data connections should be made clear by the arrows.
• the control unit 24 is arranged in the control cabinet 10.
• the system described above allows a method with the following method steps: a) determining the humidity of the atmosphere in the inner volume 14 of the control cabinet 10; b) determining the temperature of the atmosphere in the inner volume 14 of the control cabinet 10; c) determining the dew point temperature of the atmosphere in the internal volume 14 of the control cabinet 10 based on the humidity and the temperature of the atmosphere in the internal volume 14 of the control cabinet; d) determining the component temperature of at least one located in the inner volume 14 of the control cabinet 10 construction part 16; and e) Creating and executing a control command for controlling the anti-condensation heater 12 based on a comparison of the component temperature determined in method step d) and the dew point temperature determined in method step c).
• this method is based on the fact that the sensors 18, 20,
• the anti-condensation heating 12 can be controlled depending on the situation and thus energy-saving heating is possible. This can be particularly effective if, based on the control command, the output of the anti-condensation heater 12 is reduced when the component temperature determined in process step d) is greater than the dew point temperature determined in process step c).
• the sensors inside the control cabinet 10 of a switching device for determining the dew point temperature of the interior air are used in conjunction with sensors for determining the temperature of critical components 16.
• a particularly smart electronics of the control unit 24 compares the variables and decides on the basis of default values about the control of the anti-condensation heater 12 in the control cabinet 10. It then supplies, for example, a corresponding output signal to control a contactor in the control cabinet.
• the parameters temperature of the atmosphere in the control cabinet 10, component temperature and relative humidity of the atmosphere in the control cabinet 10 are determined by sensors present outside the control cabinet 10 and are appropriately approximated.
• the condition for the interruption of the anti-condensation heater 12 can preferably apply as follows: Component temperature - safety margin> dew point temperature of the control cabinet interior air.
• the safety margin is a value to be determined by the developer, for example, which is in a range of> 0. Above all, the heating and cooling behavior (time constant) of the critical component 16 or the critical components 16 should be taken into account here.
• the safety margin can be increased, or measurement can be introduced on further critical components 16 with the different temperatures to be expected. In addition to safety, this also optimizes energy efficiency.
• intermittent operation of the anti-condensation heater 12 can be possible.
• the heater remains in operation.
• the temperature of the atmosphere 14 as well as of the components 16 is increased by the introduced heat output and the relative humidity of the indoor air is reduced. This will which changes the physical-climatic parameters in such a way that condensation cannot occur.
• the operation of the anti-condensation heater 12 is maintained for a specified time (interval operating time). This time can be optimized according to the time of day and the season. Then the active shutdown takes place. This is maintained until the conditions for interrupting the anti-condensation heater 12 are met again.
• control cabinet climate data and component temperatures can also take place locally for the plurality of control cabinets, for example for an entire station, representative of only one switching device or one control cabinet 10.
• the data determined are processed and evaluated in the station control system.
• the control signal derived therefrom controls, for example, the anti-condensation heaters 12 of all control cabinets 10 in the transformer station.
• FIG. 2 shows an alternative embodiment of a corre sponding system.
• the embodiment according to Figure 2 shows a plurality of control cabinets 10. More precisely, three control cabinets 10 are shown.
• the configuration of the control cabinets 10 shown in FIG. 1 can also apply to the control cabinets 10 shown in FIG.
• FIG. 2 shows that the control unit 24 is designed as a central control unit 24.
• the control unit 24 can therefore receive sensor data for one or more control cabinets 10, for which purpose data connections marked by the arrows, in particular wireless data connections, are provided.
• the control unit 24 can carry out the method described above and, based on all the sensor data, create a control command, based on which one or preferably several anti-condensation heaters 12 of different control cabinets 10 can operate.
• sensors are used as described for FIG. 1, however, for example, the sensor data for only one representative control cabinet 10 in a substation can be transferred to the station control system, for example wirelessly.
• the measurement data or sensor data are used here by a particularly smart processing logic similar to the embodiment described above for the control of the anti-condensation heaters 12 of the switching devices in the substation.
• the processing logic for generating the control command can in principle be based on artificial intelligence and / or include a cloud solution.
• Component temperature - safety margin 1 (switchgear type) - safety margin 2 (switchgear manufacturer)> dew point temperature of the control cabinet interior air.
• the safety margins are basically defined temperature values or temperature ranges (> 0) or factors for the component temperature.
• the switching device-specific and switching device manufacturer-specific heating and cooling behavior of the respective critical components 16 should be taken into account.
• a centralized control unit 24 it is also possible, for example, to use exemplary sensors Or data for the control cabinet 10 of a switching device in a substation and its smart processing inside the station in order to derive control signals therefrom that are used for the entire system or a large number of control cabinets 10.
• sensor data for a number x control cabinets 10 can be used to control the Antikondensationshei tongues 12 of a number y control cabinets 10, the number x being smaller than the number y.
• FIG. 3 shows a diagram which shows the relationship between the dew point and the air humidity and the air temperature.
• the X-axes show the air temperature
• the Y-axes show the dew point or the dew point temperature
• different lines show the relative humidity.
• the dew point can be determined in a simple way under given climatic conditions. This is shown for an air temperature of 20 ° C and an exemplary relative humidity of 60%. If you combine the air temperature and the air humidity, you get a dew point of approx. 12 ° C.
• FIG. 4 also shows a possible simulative consideration of external climatic conditions.
• external climatic conditions such as solar radiation or the external temperature, can generally be used advantageously in order to enable effective control of the anti-condensation heater 12.
• the x-axis represents the time and the y-axis represents the temperature.
• Curve A shows the ambient temperature
• curve B shows the dew point temperature
• curve C shows the component temperature.
• An exemplary course of the component temperature is shown over time in connection with the course of the ambient and dew point temperatures of the air. If the component temperature is below the dew point temperature of the ambient air, condensation will form. At times of condensation, which are hatched and marked with x2, the control cabinet heater or anti-condensation heater 12 should be in operation.
• the anti-condensation heater 12 can be dispensed with because the component temperature is above the dew point temperature.
• the ambient temperature in particular can be important, as the component temperature tur is a function of the ambient temperature and this can asymptotically equalize after a certain time and the temperature of the atmosphere inside the control cabinet 10 will be equal to the temperature of the control cabinet 10 surrounding atmosphere.
• FIG. 5 also shows a diagram in which, by way of example, an actual daily course of climate variables is shown on the basis of real data.
• FIG. 5 shows the temperature on the left Y-axis and the relative humidity on the right Y-axis, whereas the X-axis shows the course of the day in hours.
• the curve D also shows the temperature, which in particular can be an outside temperature with respect to a control cabinet 10, and the curve F shows the relative humidity and the curve E shows the dew point temperature based on the previous parameters.
• the curves of relative humidity, outside temperature and derived dew point temperature over an entire day are thus shown in detail.
• FIG. 6 also shows a diagram which, using real values, shows the frequency of hours in a month in% in each case at a selected temperature delta, such as 5 K, between the air temperature, which, as described above, can be seen as a rough guide for the component temperature , and the dew point temperature.
• the air temperature and the component temperature as well as the humidity were approximated by measurements of the temperature and humidity outside the control cabinet 10, which is possible due to the non-airtight design of the control cabinets 10.
• the temperature deltas between ambient temperature and dew point temperature were shown graphically for each month individually and then also as an arithmetic mean or average for all months.
• the decision logic is based, for example, on the relationship between the ambient temperature and the component temperature, which continuously approaches it, so that a sufficiently large difference between the component temperature and the dew point temperature can be concluded if the difference between the ambient temperature and the dew point temperature is sufficiently high

Landscapes

• Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Power Engineering (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)
• Air Conditioning Control Device (AREA)
• Patch Boards (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72473496

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (7)

• 2019
  • 2019-09-12 DE DE102019213912.4A patent/DE102019213912A1/de active Pending
• 2020
  • 2020-08-26 US US17/642,828 patent/US20220386511A1/en active Pending
  • 2020-08-26 WO PCT/EP2020/073798 patent/WO2021047907A1/de unknown
  • 2020-08-26 EP EP20771449.4A patent/EP4008043A1/de active Pending
  • 2020-08-26 CN CN202080063837.4A patent/CN114365360A/zh active Pending

Also Published As

Similar Documents

Legal Events