CN117067633A - Condensing system state monitoring method based on standard condensing curve - Google Patents
Condensing system state monitoring method based on standard condensing curve Download PDFInfo
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- 238000004140 cleaning Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
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- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0227—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using pressure vessels, e.g. autoclaves, vulcanising pans
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- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
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Abstract
The invention relates to the technical field of composite material forming, and discloses a condensing system state monitoring method based on a standard condensing curve.
Description
Technical Field
The invention relates to the field of aircraft manufacturing, in particular to composite material molding, and more particularly relates to a condensing system state monitoring method based on a standard condensing curve.
Background
Advanced composite materials (Advanced composite materials, abbreviated as ACM) mainly refer to reinforced resin-based composite materials such as high-performance fibers (such as boron fibers, carbon fibers and aramid fibers), and the like, and the reinforced resin-based composite materials gradually replace metal parts by the advantages of high temperature resistance, fatigue resistance, damping property, good breakage safety, designability and the like, so that the reinforced resin-based composite materials are applied to the surfaces of modern aircrafts. Autoclave is the most important equipment in the composite material forming process, and is a pressure vessel with an integral heating system. In the part curing process, the autoclave needs to ensure that the part is heated, kept at a constant temperature or cooled at a certain heating rate, wherein the main condenser which absorbs heat and cools by means of condensed water plays an important role in the autoclave cooling process.
The main condenser in the autoclave and the condensing system matched with the main condenser have important influence on the cooling function of the autoclave, but the main condenser and the condensing system have closed structures, so that the problem of difficult maintenance exists, and once obvious faults occur, the forming quality of the whole tank composite parts is possibly influenced, so that huge losses are caused. The current autoclave equipment monitors the temperature and pressure in the autoclave in real time, but does not monitor and analyze the temperature and flow of condensed water in real time. In the actual production process, the types and the number of parts entering the autoclave each time have larger uncertainty, so that how to effectively process and analyze the collected real-time monitoring data, extract an effective characteristic curve, further monitor the real-time state of the autoclave condensing system, and prompt and alarm in time if abnormality and risk exist, thus becoming the problem to be solved urgently.
Disclosure of Invention
In order to solve the problems and the defects in the prior art, the invention provides a condensing system state monitoring method based on a standard condensing curve, which can quickly, effectively and scientifically solve the state monitoring problem of an autoclave condensing system.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a condensing system state monitoring method based on a standard condensing curve comprises the following steps:
collecting historical data of the main condensate water inlet temperature, the main condensate water outlet temperature, the real temperature in the autoclave, the set temperature in the autoclave and the main condensate water flow rate of the autoclave at a fixed frequency, obtaining a threshold value of a key parameter by utilizing statistical analysis of the historical data, defining the threshold value as a standard parameter, and manufacturing and forming a standard condensation curve;
judging a pressure relief operating point of the autoclave in each cooling period through a standard condensation curve, wherein the temperature at the pressure relief operating point can be judged as the effective cooling cutoff temperature;
for each cooling period, collecting the temperature of the main condensate water inlet of the autoclave, the temperature of the main condensate water outlet of the autoclave, the real temperature in the autoclave, the set temperature in the autoclave and the water flow data of the main condensate water of the autoclave in real time at the same frequency for fitting analysis, and calculating to obtain the effective cooling cut-off time, the opening time, the total consumption volume, the total consumption heat and the heat dissipation power of the main condensate water of the autoclave; the corresponding state monitoring curve is manufactured and formed according to the effective cooling cut-off time, the main condensate water opening time, the total main condensate water consumption volume, the total main condensate water consumption heat and the main condensate water heat dissipation power of all cooling periods of the autoclave;
and judging an early warning line of the state monitoring curve according to the standard condensation curve, monitoring the state monitoring curve in real time, and carrying out abnormality and risk prompt alarm when the state monitoring curve exceeds the early warning line.
Preferably, in the cooling period, a sudden change of temperature drop occurs at a certain time point in the process of steadily decreasing the temperature curve, and the point can be used as a primary judgment point of the pressure release operation point.
Preferably, in the cooling period, when a certain time point is preliminarily determined as the pressure release operation point, the critical time is determined from the pressure release, and the point can be determined as the pressure release operation point if and only if the following three conditions are satisfied:
1) The temperature at the point is lower than the pressure release judgment critical temperature;
2) The difference of the temperature reduction in three minutes before and after is more than 10 times;
3) The temperature drops three times within three minutes after this point.
Preferably, the time period required for the temperature in the hot tank to be cooled from the beginning to the effective cooling cut-off temperature is defined as the effective cooling cut-off time.
Preferably, for the main condensate water inlet temperature, the main condensate water outlet temperature and the main condensate water flow data acquisition curve in each cooling period, a certain time point can be determined as the main condensate water opening time if and only if the following four conditions are satisfied:
1) The water flow is in a stable state within 10 minutes before the moment, and the fluctuation range is +/-10 cubic meters per hour;
2) The water flow rate at the moment is less than 1 cubic meter per hour;
3) After the moment, the water flow average value of five minutes is larger than the first judging flow of the main condensate water;
4) Five to ten minutes after the moment, the water flow average value is larger than the second judging flow of the main condensate water.
Preferably, said calculating a total volume of primary condensate consumption of the autoclave comprises:
starting from the starting time of the main condensate water to the effective cooling cut-off time of the cooling period, multiplying the main condensate water flow of the autoclave per minute by 60 and then summing to finally obtain the total volume consumed by the main condensate water.
Preferably, the calculating obtains the total heat consumed by the main condensed water of the autoclave, including:
first according to the specific heat capacity formula
；
；
；
For heat (I)>Is specific heat capacity->For the quality of->For the temperature difference>For density (I)>For volume (I)>For flow rate->For time, there are:
；
then at 1 st to 1 stThe total heat consumed by the main condensate water is as follows:
；
wherein,for the sampling frequency +.>For the nth time flow, +.>For the temperature at time n>The temperature at the n-1 th time, and n is the current time.
Preferably, the heat dissipation power of the main condensate water is the heat dissipation power of the main condensate water, wherein the heat taken away from the autoclave by the main condensate water in unit volume is the heat dissipation power of the main condensate water.
The invention has the beneficial effects that:
1. according to the method, the effective cooling cut-off temperature is judged after the pressure relief operation point is found, and the effective cooling cut-off time is further determined, so that the total volume consumed by main condensate water, the taken heat and the heat dissipation power of the main condensate water are obtained under the condition that the autoclave is lowered by a fixed temperature, the state of a condensing system of the autoclave is monitored, criteria are provided for preventive maintenance such as maintenance of a condensing pump, cleaning of a condensing tower and replacement of the condensate water, and the reject ratio of products caused by equipment faults is reduced by 50%.
2. The invention is used for accurately monitoring the running state of the condensing system, can be popularized to other cooling systems which are cooled by liquid medium for accurately monitoring, such as power generation industry and the like, besides being used for forming a composite material autoclave.
Drawings
The foregoing and the following detailed description of the invention will become more apparent when read in conjunction with the following drawings in which:
FIG. 1 is a graph of a standard condensation curve of the present invention;
FIG. 2 is a graph of effective cool down cutoff time according to the present invention;
FIG. 3 is a graph of the main condensate turn-on time of the present invention;
FIG. 4 is a graph of total volume consumed by the primary condensate in accordance with the present invention;
FIG. 5 is a graph of total heat consumption of the main condensate water of the present invention;
FIG. 6 is a graph of heat dissipation power of the main condensate.
Detailed Description
In order for those skilled in the art to better understand the technical solution of the present invention, the technical solution for achieving the object of the present invention will be further described through several specific embodiments, and it should be noted that the technical solution claimed in the present invention includes, but is not limited to, the following embodiments. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, based on the embodiments of the present invention shall fall within the scope of protection of the present invention.
Autoclave is the most important equipment in the composite material forming process, and is a pressure vessel with an integral heating system. In the part curing process, the autoclave needs to ensure that the part is heated, kept at a constant temperature or cooled at a certain heating rate, wherein the main condenser which absorbs heat and cools by means of condensed water plays an important role in the autoclave cooling process. The main condenser in the autoclave and the condensing system matched with the main condenser have important influence on the cooling function of the autoclave, but the main condenser and the condensing system have closed structures, so that the problem of difficult maintenance exists, and once obvious faults occur, the forming quality of the whole tank composite parts is possibly influenced, so that huge losses are caused.
The current autoclave equipment monitors the temperature and pressure in the autoclave in real time, but does not monitor and analyze the temperature and flow of condensed water in real time. In the actual production process, the types and the number of parts entering the autoclave each time have larger uncertainty, so that how to effectively process and analyze the collected real-time monitoring data, extract an effective characteristic curve, further monitor the real-time state of the autoclave condensing system, and prompt and alarm in time if abnormality and risk exist, thus becoming the problem to be solved urgently.
Based on the above, the embodiment of the invention provides a condensing system state monitoring method based on a standard condensing curve, which can quickly, effectively and scientifically solve the problem of state monitoring of an autoclave condensing system. The standard condensing curve in the invention comprises the following basic elements: five data acquisition curves consisting of five data, namely a main condensate water inlet temperature, a main condensate water outlet temperature, a real temperature in the autoclave, a set temperature in the autoclave and a main condensate water flow rate, wherein the real temperature curve in the autoclave has an obvious pressure relief operation point, and the main condensate water flow rate curve has an obvious distinguishable main condensate water opening point and a main condensate water stabilizing point. The invention provides a monitoring method for the state of an autoclave condensing system on the basis, which specifically comprises the following steps:
s1, collecting characteristic parameters of a cooling stage related to an autoclave at a fixed frequency (for example, 1 time/min) in each cooling period, wherein the characteristic parameters comprise historical data of a main condensate water inlet temperature of the autoclave, a main condensate water outlet temperature of the autoclave, a real temperature in the autoclave, a set temperature in the autoclave and main condensate water flow rate of the autoclave, then carrying out statistical analysis on the historical data to obtain threshold values of the key parameters, defining the threshold values as standard parameters, and finally manufacturing and forming a standard condensation curve according to the standard parameters, wherein the standard condensation curve is shown in the attached figure 1 of the specification;
and S2, judging a pressure relief operation point in each cooling period of the autoclave through the manufactured standard condensation curve, and further judging that the temperature corresponding to the pressure relief operation point is the effective cooling cut-off temperature of the autoclave.
In this embodiment, it should be noted that, in the cooling period, if a descent mutation occurs in the process of steadily descending the real temperature data acquisition curve in the autoclave, the point corresponding to the mutation may be used as a criterion of the pressure release operation point (initial judgment point of the pressure release operation point). Further, when a certain point in time is preliminarily determined as the pressure release operation point in the cooling cycle, from that point in time, the point can be finally determined as the pressure release operation point if and only if the following three conditions are satisfied:
1) The temperature at the point is lower than the pressure release judgment critical temperature;
2) The difference of the temperature reduction in three minutes before and after is more than 10 times;
3) The temperature drops three times within three minutes after this point.
In this embodiment, the determination method of the pressure release determination critical temperature is specifically as follows:
after the pressure relief operation points of all the historical cooling periods are obtained, in order to eliminate the influence of irrelevant variables/manual pressure relief operation, a temperature which is larger than the pressure relief operation points of all the historical cooling periods is selected as the pressure relief judgment critical temperature.
For example, in this case, the pressure relief operation point is calculated by continuously cooling a certain autoclave for 300 cooling periods. The pressure relief operation point means that after the parts or tools in the autoclave are reduced to a certain temperature, an operator manually executes pressure relief operation on the autoclave, and the pressure relief operation point is represented as an obvious sharp reduction of the actual temperature curve of the autoclave on a graph. According to the pressure relief operation point judgment logic, the effective cooling cut-off temperature corresponding to the pressure relief operation points of 300 historical cooling periods in the working condition is smaller than 40 ℃, and the temperature of 40 ℃ is determined to be the pressure relief judgment critical temperature. The pressure release judgment critical temperature must be greater than the pressure release operation point temperature of all normal cooling of the equipment, and if the equipment and the curing parameters are different, the pressure release judgment critical temperature can be different. The upper limit of the temperature of all the pressure relief operation points can be used as the pressure relief judgment critical temperature.
S3, collecting the temperature of a main condensate water inlet of the autoclave, the temperature of a main condensate water outlet of the autoclave, the real temperature in the autoclave, the set temperature in the autoclave and the water flow data of the main condensate water of the autoclave in real time at the same frequency, analyzing and calculating to obtain the effective cooling cut-off time, the opening time, the total volume, the total heat consumption and the heat dissipation power of the main condensate water of the autoclave in each cooling period through calculation; and manufacturing and forming a corresponding state monitoring curve according to the effective cooling cut-off time, the main condensate water opening time, the total main condensate water consumption volume, the total main condensate water consumption heat and the main condensate water heat dissipation power of all cooling periods of the autoclave.
In this embodiment, for the effective cooling cutoff time, the time period required for the temperature true value in the autoclave to drop from the start temperature to the effective cooling cutoff temperature is defined as the effective cooling cutoff time. The state monitoring curve corresponding to the effective cooling cut-off time is shown in fig. 2 of the specification, in this case, as known from the effective cooling cut-off time and the early warning line of 300 cooling periods in the figure, most of the effective cooling cut-off time is 85+/-10 min, but the effective cooling cut-off time of 110 to 140 periods is suddenly higher than 100min, so that the cooling function (such as a fan) of the autoclave is shown to be failed, and preventive maintenance is needed.
In this embodiment, for the main condensate water opening time of the autoclave, according to three data acquisition curves of the main condensate water inlet temperature, the main condensate water outlet temperature, and the main condensate water flow rate in each cooling period, when a certain time point is, and only when the following four conditions are satisfied, the time point can be determined as the main condensate water opening time:
1) The water flow in the autoclave is in a stable state within 10 minutes before the moment, and the fluctuation range is +/-10 cubic meters/hour;
2) The water flow in the autoclave at the moment is less than 1 cubic meter per hour;
3) After the moment, the five-minute water flow average value of the autoclave is larger than the first judging flow of the main condensate water;
4) And after the moment, the five-to-ten-minute water flow average value of the autoclave is larger than the second judging flow of the main condensate water opening.
In this case, the primary condensate water opening first determination flow rate is set to 10 cubic meters per hour; the main condensate on second determination flow rate is set to 2510 cubic meters per hour.
In this case, the state monitoring curve of the main condensate water on time in 300 cooling periods is shown in fig. 3 of the specification, and the main condensate water on time should be maintained at a relatively high level, which can be used for assisting in determining the actual cooling power of the precooling apparatus.
In this embodiment, for the total volume consumed by the main condensate, the logical criterion for calculating the volume consumed by the main condensate is:
from the start time of the main condensate water to the effective cooling cut-off point of the cooling period, multiplying the water flow rate per minute by 60 and summing to obtain the volume consumed by the main condensate water, wherein the unit is cubic meters. (Water flow unit cubic meters per hour, data acquisition interval is 1min, so 60 times of unit conversion is adopted).
In this case, the total volume state monitoring curve of the main condensate water consumption in 300 cooling periods refers to fig. 4 of the specification, and the volume of the consumed condensate water is maintained at a relatively high level, and the equipment is 120+/-15 cubic meters. If suddenly above this range, it may be that the autoclave cool down function (e.g., blower) fails; if the temperature falls below this range, the condensation tower may be cleaned, the water pump may be maintained, and the condensed water may be replaced. The acid washing of the condenser has relatively little effect on the total volume consumed by the main condensate.
In this embodiment, the total heat consumed by the main condensate water is the total heat in the autoclave taken away by the main condensate water, and the specific calculation process is as follows:
firstly, according to a specific heat capacity formula:
；
；
；
wherein,for heat (I)>Is defined as specific heat capacity (specific heat capacity of water is 4200J/(kg. DEG C.), density is 1000 kg/m),>for the quality of->For the temperature difference>For density (I)>For volume (I)>For flow rate->For time, there are:
；
further, the data acquisition frequency is per minute, at 1 st to 1 stThe total heat consumed by the main condensate water is as follows:
；
；
wherein,for the sampling frequency +.>For the nth time flow, +.>For the temperature at time n>The temperature at the n-1 time, n is the current time;
and calculating the total heat consumed by the main condensate water in the autoclave in each cooling period.
In this case, the monitoring curve of the total heat consumption state of the main condensate water in 300 cooling periods is shown in fig. 5 of the specification.
In this embodiment, for the heat dissipation power of the main condensate water, the heat taken away from the autoclave by the unit volume of the main condensate water is defined as the heat dissipation power of the main condensate water, so the average heat dissipation power of the main condensate water is equal to the total heat taken away by the main condensate water divided by the total volume consumed by the main condensate water. In this case, the main condensate heat dissipation power state monitoring curve of 300 cooling periods is shown in fig. 6 of the specification.
And S4, judging an early warning line of the state monitoring curve according to the standard condensation curve, monitoring the state monitoring curve in real time, and carrying out abnormality and risk prompt alarm when the state monitoring curve exceeds the early warning line.
In the invention, the early warning line is a threshold value of a corresponding characteristic parameter obtained through calculation and analysis of a standard condensation curve, the characteristic parameter comprises effective cooling cut-off time, main condensate water opening time, main condensate water total volume consumption, main condensate water total heat consumption and main condensate water heat dissipation power, and the calculation method of the characteristic parameter threshold value is executed by referring to the method.
The invention determines the effective cooling cut-off temperature after finding the pressure relief operating point, and further determines the effective cooling cut-off time to obtain the total volume consumed by the main condensate water, the taken heat and the heat dissipation power of the main condensate water under the condition that the autoclave drops by a fixed temperature, thereby monitoring the state of the condensing system of the autoclave and providing a criterion for preventive maintenance such as maintenance of a condensing pump, cleaning of a condensing tower, replacement of the condensate water and the like.
The foregoing description is only a preferred embodiment of the present invention and is not intended to limit the invention in any way, but any simple modification, equivalent variation, etc. of the above embodiment according to the technical substance of the present invention falls within the scope of the present invention.
Claims (8)
1. A condensation system state monitoring method based on a standard condensation curve, comprising:
collecting historical data of the main condensate water inlet temperature, the main condensate water outlet temperature, the real temperature in the autoclave, the set temperature in the autoclave and the main condensate water flow rate of the autoclave at a fixed frequency, obtaining a threshold value of a key parameter by utilizing statistical analysis of the historical data, defining the threshold value as a standard parameter, and manufacturing and forming a standard condensation curve;
judging a pressure relief operating point of the autoclave in each cooling period through a standard condensation curve, wherein the temperature at the pressure relief operating point is judged to be the effective cooling cutoff temperature;
for each cooling period, collecting and analyzing the temperature of the main condensate water inlet of the autoclave, the temperature of the main condensate water outlet of the autoclave, the real temperature in the autoclave, the set temperature in the autoclave and the water flow data of the main condensate water of the autoclave in real time at the same frequency, and calculating to obtain the effective cooling cut-off time, the opening time, the total consumption volume, the total consumption heat and the heat dissipation power of the main condensate water of the autoclave; the corresponding state monitoring curve is manufactured and formed according to the effective cooling cut-off time, the main condensate water opening time, the total main condensate water consumption volume, the total main condensate water consumption heat and the main condensate water heat dissipation power of all cooling periods of the autoclave;
and judging an early warning line of the state monitoring curve according to the standard condensation curve, monitoring the state monitoring curve in real time, and carrying out abnormality and risk prompt alarm when the state monitoring curve exceeds the early warning line.
2. The method for monitoring the state of a condensing system based on a standard condensing curve according to claim 1, wherein in the cooling period, a sudden change of temperature drop occurs at a certain time point in the process of steadily decreasing the temperature curve, and the point is used as a preliminary judgment point of a pressure release operation point.
3. The condensation system condition monitoring method based on a standard condensation curve according to claim 2, wherein: in the cooling period, when a certain time point is preliminarily judged as a pressure relief operation point, judging critical time from the pressure relief, and judging the pressure relief operation point if and only if the following three conditions are met:
the temperature at the point is lower than the pressure release judgment critical temperature;
the difference of the temperature reduction in three minutes before and after is more than 10 times;
the temperature drops three times within three minutes after this point.
4. The method of claim 1, wherein the time period required for the temperature in the hot tank to reach the effective cooling cutoff temperature from the start of cooling is defined as the effective cooling cutoff time.
5. The method for monitoring the state of a condensing system based on a standard condensing curve according to claim 1, wherein for the main condensate water inlet temperature, the main condensate water outlet temperature and the main condensate water flow data acquisition curve in each cooling period, a certain time point is determined as the main condensate water opening time if and only if the following four conditions are satisfied:
the water flow is in a stable state within 10 minutes before the moment, and the fluctuation range is +/-10 cubic meters per hour;
the water flow rate at the moment is less than 1 cubic meter per hour;
after the moment, the water flow average value of five minutes is larger than the first judging flow of the main condensate water;
five to ten minutes after the moment, the water flow average value is larger than the second judging flow of the main condensate water.
6. The method for monitoring the state of a condensing system based on a standard condensing curve according to claim 1, wherein said calculating the total volume of main condensate water consumption of an autoclave comprises:
starting from the starting time of the main condensate water to the effective cooling cut-off time of the cooling period, multiplying the main condensate water flow of the autoclave per minute by 60 and then summing to finally obtain the total volume consumed by the main condensate water.
7. The method for monitoring the state of a condensing system based on a standard condensing curve according to claim 1, wherein said calculating the total heat consumed by the main condensed water of the autoclave comprises:
first according to the specific heat capacity formula
；
；
；
For heat (I)>Is specific heat capacity->For the quality of->For the temperature difference>For density (I)>For volume (I)>For flow rate->For time, there are:
；
then at 1 st to 1 stThe total heat consumed by the main condensate water is as follows:
；
wherein,for the sampling frequency +.>For the nth time flow, +.>For the temperature at time n>The temperature at the n-1 th time, and n is the current time.
8. The method for monitoring the state of a condensing system based on a standard condensing curve according to claim 1, wherein the heat dissipation power of the main condensed water is the heat dissipation power of the main condensed water taken away from the autoclave by the unit volume of the main condensed water.
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