Ground smoke furnace operation condition comprehensive discrimination method

Abstract

The invention discloses a ground smoke furnace operation condition comprehensive discrimination method, which comprises the following steps: discrimination of local environment conditions: obtaining a grade code of local upflow and a grade code of atmospheric stability according to collected ground meteorological elements of an environment around an operation point; judging a local condensation cloud and mist condition, and obtaining level codes of the local condensation condition and the cloud and mist condition according to the collected ground meteorological elements of the surrounding environment of the operation point; judging the cloud and mist conditions of the destination, and pre-judging the cloud bottom temperature, the condensation height and the level code of the cloud and mist conditions of the destination according to the collected ground meteorological elements of the surrounding environment of the operation point and in combination with the mountain topography; and the operation condition playable grade is used for comprehensively outputting the operation condition playable grade according to the weighted proportion of the local environment condition, the local condensation cloud and mist condition and the destination cloud and mist condition. According to the embodiment of the invention, scientific and accurate operation guidance suggestions can be provided for artificial precipitation enhancement operation of the ground smoke furnace, and automatic operation playable grade suggestions are realized.

Description

Technical Field

[0001] This invention belongs to the technical field of artificial rain enhancement, specifically relating to a comprehensive method for judging the operating conditions of ground-based smoke generators. Background Technology

[0002] Artificial rain enhancement plays a vital role in disaster prevention and mitigation, increasing water resources, and boosting agricultural production. Ground-based smoke generators, in particular, offer advantages such as operational safety, low cost, remote control, fewer command and control links, no airspace restrictions, and all-weather operation. The key lies in the fact that the ground-based smoke generators must be installed on a windward slope at a certain altitude, utilizing rising air currents to carry the catalyst into the clouds to achieve the desired rain enhancement effect.

[0003] Chinese invention patent application number 201811189037.8 describes the relationship between environmental wind direction and mountain range orientation. The prerequisite is the known selection of precipitation clouds in the early stages of development, maturity, or weakening. In practice, this requires manual prediction and cannot be automated. Especially since ground-based flue gas furnace operation sites are generally installed halfway up mountains, it is difficult to obtain actual environmental factors near the operation site using sophisticated instruments such as weather radar. Therefore, whether the actual environment meets the operational conditions is often determined by reviewing large-scale weather forecasts and making preliminary manual judgments before issuing operational commands, which cannot achieve precision. Furthermore, ground-based flue gas furnaces operate on a small scale, relying mainly on limited basic meteorological elements obtained near the operation site combined with complex terrain conditions for operational condition identification. Considering the reliance on a single factor in this aspect has many shortcomings. Summary of the Invention

[0004] In view of the aforementioned defects in existing ground-based flue gas furnace operations, the purpose of this invention is to propose a comprehensive method for judging the operating conditions of ground-based flue gas furnaces.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this invention is: a comprehensive method for judging the operating conditions of ground-based flue gas furnaces, comprising: The local environmental conditions are determined by analyzing the surface meteorological elements around the work site and obtaining the local updraft level code and atmospheric stability level code through logical condition determination. The determination of local condensation and fog conditions is based on the collected surface meteorological elements around the work site. Through logical condition determination, the level codes of local condensation and fog conditions are obtained. The determination of cloud and fog conditions at the destination is based on the collected surface meteorological elements of the surrounding environment of the work site, combined with the terrain and topography, and is determined by calculation and deduction to predict the cloud base temperature, condensation height, and cloud and fog condition level code of the target location. The broadcastability rating for operational conditions is used to output a comprehensive broadcastability rating based on a weighted average of local environmental conditions, local condensation cloud and fog conditions, and destination cloud and fog conditions.

[0006] Furthermore, surface meteorological elements include wind speed or direction, vertical airflow, total radiation, cloud cover, cloud type, temperature, and relative humidity.

[0007] Furthermore, the determination of local environmental conditions includes: the determination of updrafts and the determination of atmospheric stability; The determination of updrafts is based on the angle between the deployment location of the work site and the mountain face, the orientation of the mountain range, and the calculation of the updraft on the windward slope using horizontal wind speed and wind direction to obtain the local updraft level code. Atmospheric stability is determined by comprehensively analyzing the surface meteorological elements around the work site to assess whether the local atmospheric conditions are stable and to calculate the stability level, thereby obtaining the local atmospheric stability level code.

[0008] Furthermore, the identification of local condensation cloud and fog conditions includes: identification of local condensation conditions and identification of local cloud and fog conditions; The local condensation conditions are determined by calculating the dew point temperature based on the ambient temperature and relative humidity, obtaining the temperature-dew point difference to determine the local condensation conditions, and outputting the level code of the local condensation conditions. The local cloud and fog conditions are determined based on cloud type, cloud cover, and relative humidity, and the level code of the local cloud and fog conditions is output.

[0009] Furthermore, the determination of cloud and fog conditions at the destination includes: determination of cloud base temperature at the destination, determination of condensation height at the destination, and determination of cloud and fog conditions at the destination. Determining the destination cloud base temperature involves calculating the cloud base temperature using ambient temperature and dew point temperature, and outputting the destination cloud base temperature level code. The destination condensation height is determined by calculating the condensation height using ambient temperature and cloud base temperature, and then outputting the destination condensation height level code. The system determines the cloud and fog conditions at the destination by analyzing the mountain height difference and condensation height to determine whether clouds can form at the mountaintop, calculating the time for cloud formation at the mountaintop based on updrafts, and outputting the cloud and fog condition level code for the destination.

[0010] Furthermore, the playability level of the operation conditions is determined by comprehensively judging the levels according to the weight ratio of each level code, outputting the playability level, and providing operation suggestions.

[0011] Furthermore, the method for obtaining dew point temperature difference, cloud base temperature, and condensation height based on ambient temperature and relative humidity is as follows: The saturated vapor pressure is calculated using the Goff-Grech formula based on the ambient temperature. The actual vapor pressure is then calculated using the relative humidity. Finally, the dew point temperature is calculated using the Maglas formula, and the temperature-dew point difference and cloud base temperature are obtained. The temperature at the condensation height is calculated using Barnes' empirical formula, and then the condensation height is calculated.

[0012] Furthermore, the calculation method for cloud formation time at the mountaintop is as follows: ts=(m-cb) / w Where m is the elevation difference, cb is the condensation height, and w is the speed of the vertical airflow.

[0013] The aforementioned method for comprehensively judging the operating conditions of ground-based smoke generators can achieve the following beneficial effects: This invention proposes a method for comprehensively judging the operating conditions of ground-based smoke generators, providing scientific and accurate operational guidance suggestions for artificial rain enhancement operations using ground-based smoke generators, thereby improving the accuracy of operation identification, realizing automated operation and seeding level suggestions, reducing blind operations, and improving operational efficiency.

[0014] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the vertical airflow along the mountain range in this embodiment.

[0016] Attached diagram labels: 1-Horizontal plane; 2-Mountain face. Detailed Implementation

[0017] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0018] This invention provides a comprehensive method for judging the operating conditions of ground-mounted flue gas furnaces, including: Step 1: Determining local environmental conditions. This step involves determining the level code of the local updraft and the level code of atmospheric stability based on the surface meteorological elements around the data collection point and through logical condition determination.

[0019] Specifically, the identification of local environmental conditions is one of the core conditions for identifying operational conditions. It is necessary to know whether the atmosphere near the work site is stable and whether there is an updraft. In other words, the identification of local environmental conditions includes the identification of updrafts and the identification of atmospheric stability.

[0020] Step 1.1: Discrimination of upward airflows, which is used to determine whether the local cloud and fog environment has the ability to rise and spread to the destination, calculate the magnitude of the upward diffusion ability, combine with the location of the mountain where the operation point is located, calculate the upward component of the vertical airflow, and obtain the grade code of the local environmental upward airflow.

[0021] Specifically, the discrimination of upward airflows is based on the angle between the deployment location of the operation point and the mountain surface, the mountain range trend, and uses the horizontal wind speed and wind direction to calculate the upward airflow on the windward slope. The ground meteorological elements that need to be collected near the operation point are: vertical airflow, and the judgment method is as follows (w is the rate of the vertical airflow, unit: m / s): If w≥1, it is an upward airflow, and the grade code is output: 4; If 0.5≤w<1, it is an upward airflow, and the grade code is output: 2; If 0.09≤w<0.5, it is an upward airflow, and the grade code is output: 1; If 0<w<0.09, the horizontal wind direction can be used to assist in judging whether the airflow is upward or downward, and the vertical airflow rate is the component of the horizontal wind speed projected on the direction parallel to the mountain range.

[0022] If w≤0, it is a downward airflow, and the grade code is output: 0.

[0023] Specifically, when 0<w<0.09, please refer to Figure 1 , 1 is the horizontal plane, 2 is the mountain surface, AB is the intersection line of the mountain surface and the horizontal plane, the angle between the equipment installation and the mountain surface is θ, α is the angle between the intersection line AB and the due north direction, and β is the wind direction (due north is 0).

[0024] Combined with the mountain range trend, the horizontal wind direction can be used to assist in judging whether the airflow is upward or downward. When the mountain range trend is from southwest to northeast, the angle between the equipment installation and the mountain is θ°. If the horizontal wind direction wd≥0 and wd≤θ, or wd≥360-(90-θ) and wd≤359, it is a downward airflow; when wd≥180+θ and wd<270+θ, it is an upward airflow. When the mountain range trend is from southeast to northwest, when the horizontal wind direction wd≥360-θ and wd≤359 or wd≥0 and wd≤90-θ, it is a downward airflow; when wd>90-θ and wd≤180-θ, it is an upward airflow.

[0025] The vertical airflow rate is the component of the horizontal wind speed projected on the direction perpendicular to the mountain range: a) Based on the 1 plane, establish a coordinate system, decompose the horizontal wind speed ws in the 1 plane, parallel to the direction of the intersection line AB and perpendicular to the direction of the intersection line AB, and solve the component ws1 perpendicular to the intersection line AB; b) Based on the 2-plane, establish a coordinate system. Decompose the component ws1 perpendicular to the intersection line AB in the 2-plane into components parallel and perpendicular to the 2-plane, and solve for the component ws2 parallel to the 2-plane.

[0026] If ws2 > 0, that is, rising along the mountain surface, it is an updraft; otherwise, it is a downdraft. If it is an updraft, output the grade code: 1; if it is an updraft, output the grade code: 0.

[0027] Step 1.2: Discrimination of atmospheric stability. Comprehensively judge whether the local environmental atmosphere is stable by collecting total radiation, cloud cover, horizontal wind speed, and vertical air flow, and calculate the stability grade to obtain the grade code of the local environmental atmospheric stability.

[0028] Specifically, for the discrimination of atmospheric stability grade, the ground meteorological elements to be collected near the working point are: total radiation Radiation, cloud cover skyCover, horizontal wind speed ws, and vertical air flow. The judgment method is as follows: If Radiation = 0, it is night; If skyCover ≤ 50% and ws ≤ 3 m / s, output the atmospheric stability grade (PG method): F; if skyCover ≤ 50% and 3 < ws ≤ 5 m / s, output the atmospheric stability grade (PG method): E; if skyCover ≤ 50% and ws > 5 m / s, output the atmospheric stability grade (PG method): D; if skyCover > 50%, output the atmospheric stability grade (PG method): D; If Radiation > 0, it is day; If 0 < Radiation < 300 and skyCover ≥ 70%, output the weak radiation grade (FL): 1; if 300 ≤ Radiation < 600 and 30% < skyCover < 70%, output the medium radiation grade (FL): 2; if Radiation ≥ 600 and skyCover ≤ 30%, output the strong radiation grade (FL): 3; if ws < 2 m / s and FL = 3, output the atmospheric stability grade (PG method): A(0); if ws < 2 m / s and FL = 2, output the atmospheric stability grade (PG method): AB(1); If ws < 2 m / s and FL = 1, output the atmospheric stability class (PG method): C(4); if 2 ≤ ws ≤ 3 m / s and FL = 3, output the atmospheric stability class (PG method): B(2); if 2 ≤ ws ≤ 3 m / s and FL = 2, output the atmospheric stability class (PG method): BC(3); if 2 ≤ ws ≤ 3 m / s and FL = 1, output the atmospheric stability class (PG method): D(6); if 3 < ws ≤ 5 m / s and FL = 3, output the atmospheric stability class (PG method): C(4); if 3 < ws ≤ 5 m / s and FL = 2, output the atmospheric stability class (PG method): CD(5); if 3 < ws ≤ 5 m / s and FL = 1, output the atmospheric stability class (PG method): D(6); if 5 < ws ≤ 6 m / s and FL = 3, output the atmospheric stability class (PG method): CD (5); if 5 < ws ≤ 6 m / s and FL < 3, output the atmospheric stability class (PG method): D(6); if ws > 6 m / s, output the atmospheric stability class (PG method): D(6); If w ≥ 0.5 m / s, it is an updraft, enhancing instability, and the PG classification rises one level (e.g., D -> CD); if w < -0.3 m / s, it is a downdraft, enhancing stability, and the PG classification drops one level (e.g., D -> E); if -0.3 ≤ w < 0.5 m / s, the PG classification remains unchanged.

[0029] If PG is D / E / F, output the grade code as 0; If PG is C / CD, output the grade code as 1; If PG is B / BC, output the grade code as 2; If PG is A / AB, output the grade code as 4.

[0030] Step 2: Discrimination of local condensation and cloud conditions, used to obtain the condition codes of local condensation conditions and local cloud conditions through the determination of logical conditions based on the ground meteorological elements around the operation point collected.

[0031] Specifically, the discrimination of local condensation and cloud conditions is an effective way to increase the water vapor in the air or lower the environmental temperature to make the air saturated, and the temperature condition is also one of the factors considered comprehensively, including the discrimination of local condensation conditions and the discrimination of local cloud conditions.

[0032] Furthermore, for the discrimination of temperature conditions, when the temperature > 0 °C, output the grade code as 0; when the temperature is between -5 °C and 0 °C, output the grade code as 1; when the temperature is between -10 °C and -5 °C, output the grade code as 2; when the temperature < -10 °C, output the grade code as 4.

[0033] Step 2.1: Discrimination of local cloud and fog conditions. The ground meteorological elements to be collected near the operation point are: sky cover, cloud form, relative humidity (Rh). The judgment method is as follows: If skyCover ≥ 90, rh ≥ 90, and CloudForm = Cb (cumulonimbus) / Ns (nimbostratus) / Sc (stratocumulus) / St (stratus) / / As (altocumulus), the output grade code is 4; If 80 ≤ skyCover < 90, 84 ≤ rh < 90, and CloudForm = Cb (cumulonimbus) / Ns (nimbostratus) / Sc (stratocumulus) / St (stratus) / / As (altocumulus), the output grade code is 2; If 70 < skyCover < 80, rh ≥ 84, and CloudForm = Cb (cumulonimbus) / Ns (nimbostratus) / Sc (stratocumulus) / St (stratus) / / As (altocumulus), the output grade code is 1; In other cases, the output grade code is 0.

[0034] Step 2.2: Discrimination of local condensation conditions. The ground meteorological elements to be collected near the operation point are: ambient temperature and relative humidity. First, calculate the dew point temperature based on the ambient temperature and relative humidity, and judge the condensation conditions through the temperature dew point difference (ttd). Further, calculate the saturation vapor pressure using the Goff-Gratch formula with the temperature data, combine with the relative humidity, calculate the actual vapor pressure, and then calculate the dew point temperature through the Magnus formula to obtain the temperature dew point difference.

[0035] When ttd ≥ 5°C, the output grade code is 0; When 2°C ≤ ttd < 5°C, the output grade code is 1; When 1°C ≤ ttd < 2°C, the output grade code is 2; When ttd < 1°C, the output grade code is 4.

[0036] Step 3: Discrimination of destination cloud and fog conditions. For the collection of ground meteorological elements in the surrounding environment of the operation point, combined with the mountainous terrain and landforms, judge by calculation and deduction, and predict the cloud base condensation height and the condition code of cloud and fog conditions in the destination. The ground meteorological elements to be collected in the surrounding environment of the operation point are temperature, relative humidity, and vertical air flow.

[0037] Specifically, judge whether the mountaintop has cloud-forming conditions through the cloud base temperature condition, the water vapor lifting condensation height, and the cloud and fog conditions together.

[0038] Step 3.1: Determine the cloud base temperature of the destination. Calculate the cloud base temperature using the ambient temperature and dew point temperature, and output the cloud base temperature level code of the destination.

[0039] Specifically, cloud base temperature is obtained based on ambient temperature and dew point temperature. Cloud base temperature can roughly characterize whether a cloud is cold or warm. According to silver iodide ice nuclei, lower cloud base temperature is more conducive to conversion. The judgment logic is as follows: when cloud base temperature tc ≥ 5℃, the output level code is 0; when 0℃ ≤ tc < 5℃, the output level code is 1; when -5℃ ≤ tc < 0℃, the output level code is 2; when Tc < -5℃, the output level code is 4.

[0040] Step 3.2: Determine the condensation height at the destination. Calculate the condensation height using ambient temperature and cloud base temperature, and output the condensation height level code at the destination.

[0041] Specifically, based on the ambient temperature and cloud base temperature, the condensation height is obtained. The temperature at the condensation height can be calculated using the Barnes empirical formula, thus determining the condensation height. The judgment logic is as follows: when the condensation height cb ≥ 600, the output level code is 0; when 250 ≤ cb < 600, the output level code is 1; when 120 ≤ cb < 250, the output level code is 2; when cb < 120, the output level code is 4.

[0042] Step 3.3: Determine the cloud and fog conditions at the destination. Determine whether clouds can form at the mountain top based on the mountain height difference and condensation height. Calculate the time for clouds to form at the mountain top based on the updraft and output the level code of the cloud and fog conditions at the destination.

[0043] Specifically, the determination of whether clouds can form on a mountaintop is based on the difference in mountain height and the vertical airflow rate. The calculation method is as follows: ts=(m-cb) / w Where m is the elevation difference, cb is the condensation height, and w is the vertical airflow rate.

[0044] The judgment logic is as follows: when the condensation height cb ≥ the mountain height difference, the output level code is 4; when the condensation height cb < the mountain height difference and the time to reach the mountain top ts calculated based on the vertical airflow rate is < 180 minutes, the output level code is 4; otherwise, the output level code is 0.

[0045] Step 4: Determine the broadcastability level of operational conditions. This step is used to output the broadcastability level of operational conditions based on the weighted ratio of local environmental conditions, local condensation cloud conditions, and destination cloud conditions.

[0046] Specifically, the playability level of the job condition is determined by comprehensively judging the various level codes mentioned above according to their weight ratios, and outputting the playability level. The level code range is 0-12. The logic for the playability level of the job condition is as follows: Level code ≤ 4.3, job condition judgment result: not playable; Level code between 4.3 and 4.6, job condition judgment result: weakly playable; Level code between 4.6 and 7.1, job condition judgment result: moderately playable; Level code ≥ 7.1, job condition judgment result: strongly playable.

[0047] The present invention provides a comprehensive method for judging the operating conditions of ground-based smoke generators, which has the following beneficial effects: The present invention comprehensively judges the local environmental conditions, the local condensation cloud and fog conditions, the destination cloud and fog conditions, and the broadcastability level of the operating conditions. It takes into account the topography of the operating site and comprehensively considers the environmental conditions of the operating site. The output broadcastability level can be divided into strong broadcastability, medium broadcastability, weak broadcastability, and non-broadcastability. It provides real-time operational guidance suggestions under different weather conditions, environmental conditions, and operating locations, thereby maximally solving the current situation of subjective or blind operation in ground-based smoke generator artificial rain enhancement operations, realizing automated, scientific, and precise operation, and thus improving operational efficiency.

[0048] The above description is merely a preferred embodiment of the present invention. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments without departing from the scope of the present invention and based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A comprehensive method for judging the operating conditions of ground-based flue gas furnaces, characterized in that, include: The local environmental conditions are determined by analyzing the surface meteorological elements around the work site and obtaining the local updraft level code and atmospheric stability level code through logical condition determination. The determination of local condensation and fog conditions is based on the collected surface meteorological elements around the work site. Through logical condition determination, the level codes of local condensation and fog conditions are obtained. The determination of cloud and fog conditions at the destination is based on the collected surface meteorological elements of the surrounding environment of the work site, combined with the terrain and topography, and is determined by calculation and deduction to predict the cloud base temperature, condensation height, and cloud and fog condition level code of the target location. The broadcastability rating for operational conditions is used to output a comprehensive broadcastability rating based on a weighted average of local environmental conditions, local condensation cloud and fog conditions, and destination cloud and fog conditions.

2. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 1, characterized in that, Surface meteorological elements include wind speed or direction, vertical airflow, total radiation, cloud cover, cloud type, temperature, and relative humidity.

3. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 1, characterized in that, The determination of local environmental conditions includes: the determination of updrafts and the determination of atmospheric stability; The determination of updrafts is based on the angle between the deployment location of the work site and the mountain face, the orientation of the mountain range, and the calculation of the updraft on the windward slope using horizontal wind speed and wind direction to obtain the local updraft level code. Atmospheric stability is determined by comprehensively analyzing the surface meteorological elements around the work site to assess whether the local atmospheric conditions are stable and to calculate the stability level, thereby obtaining the local atmospheric stability level code.

4. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 1, characterized in that, The identification of local condensation cloud and fog conditions includes: identification of local condensation conditions and identification of local cloud and fog conditions; The local condensation conditions are determined by calculating the dew point temperature based on the ambient temperature and relative humidity, obtaining the temperature-dew point difference to determine the local condensation conditions, and outputting the level code of the local condensation conditions. The local cloud and fog conditions are determined based on cloud type, cloud cover, and relative humidity, and the level code of the local cloud and fog conditions is output.

5. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 1, characterized in that, Determination of cloud and fog conditions at the destination includes: determination of cloud base temperature at the destination, determination of condensation height at the destination, and determination of cloud and fog conditions at the destination. Determining the destination cloud base temperature involves calculating the cloud base temperature using ambient temperature and dew point temperature, and outputting the destination cloud base temperature level code. The destination condensation height is determined by calculating the condensation height using ambient temperature and cloud base temperature, and then outputting the destination condensation height level code. The system determines the cloud and fog conditions at the destination by analyzing the mountain height difference and condensation height to determine whether clouds can form at the mountaintop, calculating the time for cloud formation at the mountaintop based on updrafts, and outputting the cloud and fog condition level code for the destination.

6. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 1, characterized in that, The playability level of the job conditions is determined by comprehensively judging the level codes obtained from each part according to the weight ratio, outputting the playability level, and providing job suggestions.

7. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 5, characterized in that, The method for obtaining dew point temperature difference, cloud base temperature, and condensation height based on ambient temperature and relative humidity is as follows: The saturated vapor pressure is calculated using the Goff-Grech formula based on the ambient temperature. The actual vapor pressure is then calculated using the relative humidity. Finally, the dew point temperature is calculated using the Maglas formula, and the temperature-dew point difference and cloud base temperature are obtained. The temperature at the condensation height is calculated using Barnes' empirical formula, and then the condensation height is calculated.

8. The method for comprehensively judging the operating conditions of a ground-based flue gas furnace according to claim 5, characterized in that, The method for calculating the time of cloud formation at the mountain top is as follows: ts=(m-cb) / w Where m is the elevation difference, cb is the condensation height, and w is the speed of the vertical airflow.

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