A performance testing method and system for a heat exchange unit of an air-cooled condenser

Abstract

The present invention provides a performance testing method and system for an air-cooled condenser heat exchange unit, which can be used in the field of detection technology. The performance testing method for the air-cooled condenser heat exchange unit includes: within a target time period, using an environmental parameter measuring device to measure the environmental parameters of the environment where the heat exchange unit to be tested of the air-cooled condenser is located, and using a pre-arranged heat exchange parameter measuring device to measure the heat exchange parameters of the heat exchange unit to be tested; determining the heat exchange performance of the heat exchange unit to be tested according to the measured environmental parameters and heat exchange parameters. The system is used to execute the above method. The performance testing method and system for the air-cooled condenser heat exchange unit provided by the present invention realize on-site testing of various operating conditions of a single heat exchange unit, determine the heat exchange performance of the heat exchange unit, and can also be applicable to the comparison of the same operating conditions of different heat exchange units or the comparison of different operating conditions of the same heat exchange unit.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and particularly relates to a performance test method and system for a heat exchange unit of an air-cooled condenser. Background Art

[0002] The air-cooled condenser of a large-scale direct air-cooled thermal power unit consists of multiple groups of heat exchange units, and each heat exchange unit is composed of an air-cooling fan, a radiator heat transfer tube bundle, a steam distribution pipe, a condensate collection pipe, etc. The number of heat exchange units of the air-cooled condenser of a large-scale thermal power unit is relatively large, generally about 60 groups. The performance test of the air-cooled condenser is carried out with all heat exchange units as a whole. There are many test points, the workload is large, the time consumption is long, and the conclusion is whether the performance of the entire air-cooled condenser meets the standard.

[0003] During the actual operation of the unit, for the purposes of improving operation safety, operation economy, etc., it is necessary to compare the operation performance of different heat exchange units, or compare the operation performance before and after the transformation of the equipment components or the change of the operation mode of the same heat exchange unit. If the performance test of the air-cooled condenser is still carried out, it will cause a great waste of manpower and material resources, and the conclusion is not referenceable and guiding. Summary of the Invention

[0004] In view of the problems in the prior art, an embodiment of the present invention provides a performance test method and system for a heat exchange unit of an air-cooled condenser, which can at least partially solve the problems existing in the prior art.

[0005] On the one hand, the present invention provides a performance test method for a heat exchange unit of an air-cooled condenser, including: within a target time period, using an environmental parameter measurement device to measure the environmental parameters of the environment where the heat exchange unit to be tested of the air-cooled condenser is located, and using a pre-arranged heat exchange parameter measurement device to measure the heat exchange parameters of the heat exchange unit to be tested; determining the heat exchange performance of the heat exchange unit to be tested according to the measured environmental parameters and heat exchange parameters.

[0006] Optionally, the number of the heat exchange units to be tested is at least two, and each heat exchange unit to be tested is respectively provided with the heat exchange parameter measurement device, and the heat exchange parameter measurement device of each heat exchange unit to be tested is used to measure the heat exchange parameters of the heat exchange unit to be tested within the target time period.

[0007] Optionally, the heat exchange parameter measurement devices provided for each heat exchange unit to be tested are the same, and the arrangement positions of the heat exchange parameter measurement devices relative to the heat exchange units to be tested are the same.

[0008] Optionally, the number of the heat exchange units to be tested is one, and the step of using a pre-arranged heat exchange parameter measurement device to measure the heat exchange parameters of the heat exchange unit to be tested includes:

[0009] Measure the heat transfer parameters of the heat transfer unit to be measured at different fan speeds by using a pre-arranged heat transfer parameter measuring device;

[0010] Determining the heat transfer performance of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters includes:

[0011] Determine the heat transfer performance of the heat transfer unit to be measured at different fan speeds according to the measured environmental parameters and heat transfer parameters.

[0012] Optionally, the measuring the heat transfer parameters of the heat transfer unit to be measured at different fan speeds by using a pre-arranged heat transfer parameter measuring device includes:

[0013] For each test speed, after the fan of the heat transfer unit to be measured has been running stably at the test speed for a preset duration, use a pre-arranged heat transfer parameter measuring device to measure the heat transfer parameters of the heat transfer unit to be measured at the test speed.

[0014] Optionally, the environmental parameters include at least one of the following: environmental temperature, atmospheric pressure, environmental wind speed, environmental wind direction; the heat transfer parameters include at least one of the following: fan outlet wind speed, fan outlet air temperature, radiator outlet wind speed, radiator outlet air temperature.

[0015] Optionally, the environmental parameter measuring device includes a mechanical ventilation psychrometer for measuring environmental temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer and wind vane for measuring environmental wind speed and direction; and / or

[0016] The heat transfer parameter measuring device includes a first multi-point anemometer and air temperature meter for measuring the fan outlet wind speed and air temperature, and a second multi-point anemometer and air temperature meter for measuring the radiator outlet wind speed and air temperature.

[0017] Optionally, the mechanical ventilation psychrometer is set at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or the pressure transmitter is set on the air-cooled island platform; and / or the anemometer and wind vane are set on the boiler roof of the thermal power unit.

[0018] Optionally, the measuring points of the first multi-point anemometer and air temperature meter are arranged on the outlet side of the fan of the heat transfer unit to be measured according to the equal-area ring method; and / or the measuring points of the second multi-point anemometer and air temperature meter are respectively distributed according to the equal-distance method on the two outlet sides of the radiator of the heat transfer unit to be measured.

[0019] Optionally, the determining the heat transfer performance of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters includes:

[0020] Calculate the heat transfer amount on the air side of the heat exchange unit to be measured according to the measured environmental parameters and the heat transfer parameters; and / or

[0021] Draw the wind speed and temperature distribution diagrams at the fan outlet and radiator outlet of the heat exchange unit to be measured according to the measured environmental parameters and the heat transfer parameters;

[0022] Determine the heat transfer performance of the heat exchange unit to be measured according to the wind speed and temperature distribution diagrams;

[0023] On the other hand, the present invention provides a performance test system for a heat exchange unit of an air-cooled condenser, including:

[0024] An environmental parameter measuring device for measuring the environmental parameters of the environment where the heat exchange unit to be measured of the air-cooled condenser is located during a target time period;

[0025] A heat transfer parameter measuring device for measuring the heat transfer parameters of the heat exchange unit to be measured during the target time period;

[0026] A heat transfer performance determining device, which is respectively connected to the environmental parameter measuring device and the heat transfer parameter measuring device, and is used to determine the heat transfer performance of the heat exchange unit to be measured according to the environmental parameters and the heat transfer parameters;

[0027] Optionally, the number of the heat exchange units to be measured is at least two, and each heat exchange unit to be measured is respectively provided with the heat transfer parameter measuring device, and the heat transfer parameter measuring device of each heat exchange unit to be measured is used to measure the heat transfer parameters of this heat exchange unit to be measured during the target time period;

[0028] Optionally, the heat transfer parameter measuring devices provided for each heat exchange unit to be measured are the same, and the arrangement positions of each heat transfer parameter measuring device relative to the heat exchange unit to be measured are the same;

[0029] Optionally, the number of the heat exchange units to be measured is one, and the heat transfer parameter measuring device is specifically used for: measuring the heat transfer parameters of the heat exchange unit to be measured of the air-cooled condenser at different fan speeds during a target time period;

[0030] The heat transfer performance determining device is specifically used for: determining the heat transfer performance of the heat exchange unit to be measured at different fan speeds according to the measured environmental parameters and the heat transfer parameters;

[0031] Optionally, the heat transfer parameter measuring device is specifically used for: for each test speed, after the fan of the heat exchange unit to be measured of the air-cooled condenser runs stably for a preset duration at the test speed, measuring the heat transfer parameters of the heat exchange unit to be measured at the test speed;

[0032] Optionally, the environmental parameters include at least one of the following: environmental temperature, atmospheric pressure, environmental wind speed, and environmental wind direction;

[0033] The heat transfer parameters include at least one of the following: the wind speed at the fan outlet, the air temperature at the fan outlet, the wind speed at the radiator outlet, and the air temperature at the radiator outlet.

[0034] Optionally, the environmental parameter measuring device includes a mechanical ventilation psychrometer for measuring environmental temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer and wind vane for measuring environmental wind speed and direction; and / or

[0035] The heat transfer parameter measuring device includes a first multi-point anemometer and air temperature meter for measuring the wind speed and air temperature at the fan outlet, and a second multi-point anemometer and air temperature meter for measuring the wind speed and air temperature at the radiator outlet.

[0036] Optionally, the mechanical ventilation psychrometer is installed at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or the pressure transmitter is installed on the air-cooled island platform; and / or the anemometer and wind vane are installed on the boiler roof of the thermal power unit.

[0037] Optionally, the measuring points of the first multi-point anemometer and air temperature meter are arranged on the outlet side of the fan of the heat transfer unit to be measured according to the equal-area ring method; and / or

[0038] The measuring points of the second multi-point anemometer and air temperature meter are distributed on the two outlet sides of the radiator of the heat transfer unit to be measured according to the equal-distance method respectively.

[0039] Optionally, the heat transfer performance determining device is specifically configured to:

[0040] Calculate the air-side heat transfer amount of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters; and / or

[0041] Draw the wind speed and air temperature distribution diagrams at the fan outlet and radiator outlet of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters;

[0042] Determine the heat transfer performance of the heat transfer unit to be measured according to the wind speed and air temperature distribution diagrams.

[0043] The performance testing method and system for the heat exchange unit of an air-cooled condenser provided by the embodiments of the present invention realize on-site testing of various operating conditions of a single heat exchange unit in a relatively low-cost and rapid manner, and determine the heat exchange performance of the heat exchange unit. Since the flow field data of the heat exchange unit fluctuates greatly, this method is more suitable for comparing the same operating conditions of different heat exchange units or comparing different operating conditions of the same heat exchange unit. The test data obtained by the method provided by the embodiments of the present invention can not only obtain the final result of the heat transfer amount of the heat exchange unit, but also obtain the process data affecting this result. By analyzing the process data, the operating effects of the components of the heat exchange unit can be preliminarily judged, providing a technical reference for the adjustment of the operating mode and the transformation of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0045] Figure 1 is a schematic diagram of a performance testing method for a heat exchange unit of an air-cooled condenser provided by an embodiment of the present invention.

[0046] Figure 2 is a schematic diagram of the arrangement of measuring points at the fan outlet provided by an embodiment of the present invention (only the arrangement of measuring points on one radius is shown in the figure).

[0047] Figure 3 is a schematic diagram of the test sections at the fan outlet and the radiator outlet provided by an embodiment of the present invention.

[0048] Figure 4 is a schematic diagram of the test method at the radiator outlet provided by an embodiment of the present invention.

[0049] Figure 5 is a schematic diagram of the structure of a performance testing system for a heat exchange unit of an air-cooled condenser provided by an embodiment of the present invention.

[0050] Figure 6 is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer and more understandable, the following further elaborates on the embodiments of the present invention with reference to the accompanying drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be arbitrarily sorted with each other.

[0052] Regarding the "first", "second",... used herein, it does not particularly refer to the meaning of order or sequence, nor is it used to limit the present invention. It is only used to distinguish elements or operations described with the same technical terms.

[0053] Regarding the "including", "comprising", "having", "containing", etc. used herein, they are all open-ended terms, that is, they mean including but not limited to.

[0054] Regarding the "and / or" used herein, it includes any or all of the arrangements of the described things.

[0055] To better understand the present invention, the following briefly introduces the research background of the present invention:

[0056] Currently, when facing the technical problems proposed in the background art, there is no relevant test standard to guide such tests. The relatively close test standard is the "DLT 552 / 2015 Test Regulations for the Performance of Heat Transfer Elements of Air-Cooled Condensers in Thermal Power Plants". This standard conducts laboratory performance tests on the radiators mentioned in the background art and cannot meet the needs of evaluating the operating performance of heat exchange units containing multiple components.

[0057] To meet the actual needs, it is necessary to design a test method with relatively convenient and feasible implementation and relatively accurate and reliable evaluation results. When conducting tests on a single heat exchange unit alone, the difficulty lies in that it is difficult to obtain the enthalpy value and flow rate of the heat source medium (steam), while the temperature and pressure of the cold source medium (air) are relatively easy to measure, but its flow rate fluctuates greatly and the flow field is relatively complex.

[0058] Figure 1 This is a performance test method for a heat exchange unit of an air-cooled condenser provided by an embodiment of the present invention. As Figure 1 shown, the performance test method for a heat exchange unit of an air-cooled condenser provided by an embodiment of the present invention includes:

[0059] S101. During a target time period, use an environmental parameter measurement device to measure the environmental parameters of the environment where the heat exchange unit to be tested of the air-cooled condenser is located, and use a pre-arranged heat exchange parameter measurement device to measure the heat exchange parameters of the heat exchange unit to be tested;

[0060] In this step, when measuring the heat transfer parameters of the heat transfer unit to be tested, in order to reduce the influence of environmental factors on the comparison of the heat transfer performance differences of the heat transfer unit to be tested, the environmental parameters of the environment where the heat transfer unit to be tested is located are measured at the same time. In this way, the heat transfer performance of different heat transfer units to be tested operating under the same working conditions can be compared, or the influence of different environmental factors on the heat transfer performance of the heat transfer unit to be tested can be compared.

[0061] The target time period for the specific implementation of the test can be freely set. The environmental parameters to be measured can include various types. Correspondingly, the environmental parameter measuring device can include various devices or instruments respectively used to measure different environmental parameters; by the same token, the heat transfer parameters to be measured can also include multiple types. Correspondingly, the heat transfer parameter measuring device can include various devices or instruments respectively used to measure different heat transfer parameters, or can be a device or instrument that can measure different heat transfer parameters.

[0062] S102. Determine the heat transfer performance of the heat transfer unit to be tested according to the measured environmental parameters and heat transfer parameters.

[0063] In this step, the heat transfer performance of the heat transfer unit to be tested can be evaluated by the air-side heat transfer amount, or can be evaluated by the wind speed and temperature distribution map, etc. After obtaining the environmental parameters and the heat transfer parameters, the air-side heat transfer amount of the heat transfer unit to be tested can be calculated according to the environmental parameters and the heat transfer parameters, and / or the wind speed and temperature distribution map of the heat transfer unit to be tested can be drawn according to the environmental parameters and the heat transfer parameters.

[0064] The performance test method for the air-cooled condenser heat transfer unit provided by the embodiment of the present invention realizes on-site testing of various operating conditions of a single heat transfer unit in a relatively low-cost and relatively fast manner, and determines the heat transfer performance of the heat transfer unit. Since the flow field data of the heat transfer unit fluctuates greatly, this method is more suitable for the comparison of the same working conditions of different heat transfer units or the comparison of different working conditions of the same heat transfer unit. The test data obtained by the method provided by the embodiment of the present invention can not only obtain the final result of the heat transfer amount of the heat transfer unit, but also obtain the process data that affects this result. By analyzing the process data, a preliminary judgment can be made on the operating effects of the components of the heat transfer unit, providing a technical reference for the adjustment of the operating mode and the transformation of the equipment.

[0065] Optionally, in an embodiment of the present invention, the number of the heat transfer units to be tested is at least two, and each heat transfer unit to be tested is respectively provided with the heat transfer parameter measuring device, and the heat transfer parameter measuring device of each heat transfer unit to be tested is used to measure the heat transfer parameters of the heat transfer unit to be tested during the target time period.

[0066] In this embodiment, when the number of the heat exchange units to be measured is multiple, each of the heat exchange units to be measured is provided with a heat exchange parameter measuring device, and the heat exchange parameter measuring device of each of the heat exchange units to be measured is configured to measure the heat exchange parameters of the corresponding heat exchange unit to be measured within the target time period.

[0067] Optionally, in the above embodiment, the heat exchange parameter measuring devices provided for the respective heat exchange units to be measured are the same, and the arrangement positions of the respective heat exchange parameter measuring devices relative to the heat exchange units to be measured are the same.

[0068] In this embodiment, the measuring point arrangements of the same heat exchange unit under different working conditions or different heat exchange units and the testing devices installed at each measuring point are kept completely consistent to reduce the influence of equipment errors on the comparison of the performance differences of the heat exchange units.

[0069] Optionally, in another embodiment of the present invention, the number of the heat exchange units to be measured is one, and the step of measuring the heat exchange parameters of the heat exchange unit to be measured by using the pre-arranged heat exchange parameter measuring device includes: measuring the heat exchange parameters of the heat exchange unit to be measured by using the pre-arranged heat exchange parameter measuring device at different fan speeds;

[0070] The step of determining the heat exchange performance of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters includes: determining the heat exchange performance of the heat exchange unit to be measured at different fan speeds according to the measured environmental parameters and heat exchange parameters.

[0071] In this embodiment, the measuring point arrangements of the same heat exchange unit under different working conditions and the testing devices installed at each measuring point can be kept completely consistent to reduce the influence of equipment errors on the comparison of the performance differences of the heat exchange units.

[0072] At different fan speeds, the heat exchange unit to be measured is in different operating conditions, and the fan speed has a great influence on the heat exchange performance of the heat exchange unit. Therefore, by adjusting the fan speed, the heat exchange performance of the heat exchange unit to be measured at different fan speeds can be determined, and further the influence of the fan speed on the heat exchange performance of the heat exchange unit to be measured can be obtained.

[0073] Optionally, in the above embodiment, the step of measuring the heat exchange parameters of the heat exchange unit to be measured by using the pre-arranged heat exchange parameter measuring device at different fan speeds includes: for each test speed, after the fan of the heat exchange unit to be measured has been stably operating at the test speed for a preset duration, measuring the heat exchange parameters of the heat exchange unit to be measured at the test speed by using the pre-arranged heat exchange parameter measuring device.

[0074] In this embodiment, the test is carried out after the fan of the heat exchange unit to be measured has been stably operating at the test speed for a preset duration. The test duration should not be less than 10 minutes, and the preset duration can be 10 minutes.

[0075] When evaluating the heat exchange performance of the heat exchange unit to be tested, in addition to considering the above factors, the power at the fan motor end can also be considered, that is, the work efficiency of the heat exchange unit can be considered. Specifically, the power at the fan motor end can be measured in the fan motor control center, and the cable loss from the control cabinet to the motor terminal should be deducted from the measured power.

[0076] In any of the above embodiments, if only the operating performance of the same heat exchange unit under different operating conditions, or the operating performance of different heat exchange units under the same operating conditions is to be compared, the impact of flow fluctuations and equipment errors can be reduced by increasing the number of measuring points, appropriately extending the test time, ensuring that the positions of the measuring points and the test equipment installed at each measuring point are completely consistent, and other measures.

[0077] Optionally, the environmental parameters include at least one of the following: ambient temperature, atmospheric pressure, ambient wind speed, ambient wind direction; the heat exchange parameters include at least one of the following: fan outlet wind speed, fan outlet wind temperature, radiator outlet wind speed, radiator outlet wind temperature. On this basis, the environmental parameter measuring device includes a mechanical ventilation psychrometer for measuring ambient temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer for measuring ambient wind speed and wind direction; and / or the heat exchange parameter measuring device includes a first multi-point anemometer for measuring fan outlet wind speed and wind temperature, and a second multi-point anemometer for measuring radiator outlet wind speed and wind temperature. Each of the above test instruments can be tested every 1 second within the target time period.

[0078] Optionally, the mechanical ventilation psychrometer is set at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or the pressure transmitter is set on an air-cooled island platform; and / or the anemometer is set on the roof of the boiler room of the thermal power unit.

[0079] like Figure 2 As shown, optionally, the measuring points of the first multi-point anemometer are arranged on the outlet side 3 of the fan of the heat exchange unit to be tested according to the equal area ring method; and / or the measuring points of the second multi-point anemometer are distributed on the two outlet sides of the radiator of the heat exchange unit to be tested according to the equidistant method.

[0080] In this embodiment, the test section of the fan outlet wind speed and wind temperature is at the fan outlet side 3 (see Figure 3 The vertical distance between the test section 31 in the figure and the axis of the fan blade is not less than 0.8 m (see Figure 2 ), since the wind speed distribution at the fan outlet plane is not uniform, the closer to the center, the higher the wind speed, so the measurement points are arranged using the equal area ring method, each equal area ring area is not greater than 6.0 square meters, and the measurement points can be arranged on 6 wind tube radii with an angle of 60° to each other (see Figure 2)。The distance from the center of the air duct to each measuring point of equal area ring is calculated according to the following formula:

[0081]

[0082] In the formula:

[0083] R n is the distance from the center of the air duct to each measuring point;

[0084] R is the distance from the center of the air duct to the end of the blade;

[0085] n is the measuring point number starting from the center of the air duct;

[0086] m is the number of equal area rings;

[0087] r is the radius of the ineffective area of the test section, and a value greater than or equal to 0.8 meters can be taken.

[0088] As Figure 3 shown, the test section 11 of the air velocity and air temperature at the outlet of the A surface of the radiator is on the outlet side of the A surface of the radiator, and the vertical distance from the A surface of the radiator 1 is not less than 0.5 meters; as Figure 4 shown, 6 to 8 measuring points are arranged at equal intervals at the measuring point 6. The test equipment can be fixed on the radiator flushing device 5. During the test, the flushing device 5 is slowly and uniformly pushed to move left and right to complete the data test of the entire test section.

[0089] The test section 21 of the air velocity and air temperature at the outlet of the B surface of the radiator is on the outlet side of the B surface of the radiator 2 (see Figure 3 the test surface two in), and the rest is the same as the outlet of the A surface of the radiator 1.

[0090] Optionally, determining the heat transfer performance of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters includes: calculating the air-side heat transfer amount of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters; and / or

[0091] drawing the air velocity and air temperature distribution diagrams at the outlet of the fan and the outlet of the radiator of the heat transfer unit to be measured according to the measured environmental parameters and heat transfer parameters; and determining the heat transfer performance of the heat transfer unit to be measured according to the air velocity and air temperature distribution diagrams.

[0092] In this embodiment, after obtaining the environmental parameters and heat transfer parameters, data processing is performed. Specifically, for each operating condition, the arithmetic mean of the measured values of each parameter under that operating condition is taken as the representative value of that operating condition, and the data with the error between the air volume at the fan outlet and the air volume at the radiator outlet within 10% is selected as valid data for use.

[0093] After obtaining the valid data, evaluate the heat transfer performance of the heat exchange unit to be tested by calculating the air-side heat transfer measurement, and / or evaluate the heat transfer performance of the heat exchange unit to be tested by drawing the wind speed and wind temperature distribution map. Specifically:

[0094] (1) Calculation of air-side heat transfer quantity

[0095] The calculation formula for the air-side heat transfer quantity is: Q = c p ′r′G′Dt;

[0096] In the formula,

[0097] Q is the air-side heat transfer quantity;

[0098] c p is the specific heat capacity of air;

[0099] r is the air density;

[0100] G is the air volume flow rate;

[0101] Dt is the difference between the air temperatures at the radiator outlet and the fan outlet.

[0102] (2) Draw the wind speed and wind temperature distribution map, and analyze the influencing factors of the heat transfer effect difference under different fan speeds or different working conditions by analyzing the characteristics of the flow field. Specifically, drawing software can be used to draw the wind speed and wind temperature map at the fan outlet (polar coordinate system) and the wind speed and wind temperature map at the radiator outlet (rectangular coordinate system).

[0103] The method of determining the heat transfer performance of the heat exchange unit to be tested by drawing the wind speed and wind temperature distribution map can be applied in the following scenarios:

[0104] 1. Generally, the temperature distribution at the fan outlet is relatively uniform, but the wind speed distribution at the fan outlet is not uniform, and the wind speed is larger closer to the center. For different fans at different positions or the same fan under different working conditions, the wind speed distribution at its outlet has different characteristics. For the fans arranged at the edge of the air-cooled island, the characteristic of the wind speed distribution at the outlet is that the wind speed on the side without adjacent fans is relatively low. For the same fan under different ambient wind directions and ambient wind speeds, the wind speed distribution at the outlet is also different: generally speaking, after the ambient wind speed is greater than 3 m / s, as the ambient wind speed increases, the wind speed at the fan outlet will decrease, but how it is distributed on the radii in different directions at the fan outlet can be studied using this method. Similarly, the influence of the change in the ambient wind direction on the wind speed distribution at the outlets of different fans can also be studied using this method.

[0105] 2. There is a negative correlation between the wind speed and wind temperature distribution at the radiator outlet. The characteristic of the wind speed distribution at the radiator is that the wind speed is larger closer to the top. The wind speed distributions at the radiator outlets on both sides of a single air-cooled heat exchange unit are not the same, which is related to the fan position, the fan rotation direction, and the arrangement of the flow disturbance devices in the heat exchange unit. On this basis, this method can be used to study the wind speed distribution at the radiator outlets on both sides of a single air-cooled heat exchange unit.

[0106] The performance test method for the heat exchange unit of the air-cooled condenser provided by the embodiment of the present invention has a test section that not only includes the fan outlet but also the radiator outlet. By increasing the test time and the number of test times, it is possible to ensure the comparison of the air volumes of the two, with the deviation requirement within 10%, so as to reduce the influence of the flow field fluctuation on the comparison of the performance differences of the heat exchange units. At the same time, the flow field data of different test sections are increased, which is convenient for targeted analysis of different devices when comparing the performance differences of the heat exchange units. The flow velocity and temperature of the air are also measured simultaneously at multiple points of the wind speed, reducing the test duration and the test workload, and ensuring the position unity of the wind speed and wind temperature data.

[0107] Figure 5 is a performance test system for the heat exchange unit of the air-cooled condenser provided by the embodiment of the present invention. As Figure 5 shown, the performance test system for the heat exchange unit of the air-cooled condenser provided by the embodiment of the present invention includes: an environmental parameter measuring device 201 for measuring the environmental parameters of the environment where the heat exchange unit to be tested of the air-cooled condenser is located within a target time period; a heat exchange parameter measuring device 202 for measuring the heat exchange parameters of the heat exchange unit to be tested within the target time period; a heat exchange performance determining device 203, connected to the environmental parameter measuring device and the heat exchange parameter measuring device respectively, for determining the heat exchange performance of the heat exchange unit to be tested according to the environmental parameters and the heat exchange parameters.

[0108] The performance test system for the heat exchange unit of the air-cooled condenser provided by the embodiment of the present invention realizes on-site testing of various operating conditions of a single heat exchange unit in a relatively low-cost and fast manner, and determines the heat exchange performance of the heat exchange unit. Since the flow field data of the heat exchange unit fluctuates greatly, this method is more suitable for comparing the same working conditions of different heat exchange units or different working conditions of the same heat exchange unit. The test data obtained by the method provided by the embodiment of the present invention can not only obtain the final result of the heat exchange amount of the heat exchange unit, but also obtain the process data that affects this result. By analyzing the process data, a preliminary judgment can be made on the operating effects of the components of the heat exchange unit, providing a technical reference for the adjustment of the operating mode and the transformation of the equipment.

[0109] Optionally, the number of the heat exchange units to be tested is at least two, and each heat exchange unit to be tested is respectively provided with the heat exchange parameter measuring device, and the heat exchange parameter measuring device of each heat exchange unit to be tested is used to measure the heat exchange parameters of this heat exchange unit to be tested within the target time period.

[0110] Optionally, the heat exchange parameter measuring devices provided for each heat exchange unit to be tested are the same, and the arrangement positions of the heat exchange parameter measuring devices relative to the heat exchange units to be tested are the same.

[0111] Optionally, the number of the heat exchange units to be measured is one, and the heat exchange parameter measuring device is specifically configured to: measure the heat exchange parameters of the heat exchange unit to be measured of the air-cooled condenser at different fan speeds within a target time period;

[0112] The heat exchange performance determining device is specifically configured to: determine the heat exchange performance of the heat exchange unit to be measured at different fan speeds according to the measured environmental parameters and the heat exchange parameters.

[0113] Optionally, the heat exchange parameter measuring device is specifically configured to: for each test speed, after the fan of the heat exchange unit to be measured of the air-cooled condenser has been stably operating at the test speed for a preset duration, measure the heat exchange parameters of the heat exchange unit to be measured at the test speed.

[0114] Optionally, the environmental parameters include at least one of the following: environmental temperature, atmospheric pressure, environmental wind speed, environmental wind direction; the heat exchange parameters include at least one of the following: fan outlet wind speed, fan outlet air temperature, radiator outlet wind speed, radiator outlet air temperature.

[0115] Optionally, the environmental parameter measuring device includes a mechanical ventilation psychrometer for measuring environmental temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer and wind vane for measuring environmental wind speed and direction; and / or

[0116] The heat exchange parameter measuring device includes a first multi-point anemometer and air temperature meter for measuring the fan outlet wind speed and air temperature, and a second multi-point anemometer and air temperature meter for measuring the radiator outlet wind speed and air temperature.

[0117] Optionally, the mechanical ventilation psychrometer is arranged at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or the pressure transmitter is arranged on the air-cooled island platform; and / or the anemometer and wind vane are arranged on the boiler roof of the thermal power unit.

[0118] Optionally, the measuring points of the first multi-point anemometer and air temperature meter are arranged on the outlet side of the fan of the heat exchange unit to be measured according to the equal-area ring method; and / or

[0119] The measuring points of the second multi-point anemometer and air temperature meter are respectively distributed according to the equal-distance method on the two outlet sides of the radiator of the heat exchange unit to be measured.

[0120] Optionally, the heat exchange performance determining device is specifically configured to:

[0121] Calculate the air-side heat transfer quantity of the heat exchange unit to be measured according to the measured environmental parameters and the heat exchange parameters; and / or

[0122] Draw the wind speed and air temperature distribution diagrams at the fan outlet and the radiator outlet of the heat exchange unit to be measured according to the measured environmental parameters and the heat exchange parameters.

[0123] Determine the heat exchange performance of the heat exchange unit to be measured according to the wind speed and wind temperature distribution map.

[0124] The embodiments of the device provided by the embodiments of the present invention can specifically be used to execute the processing flows of the above method embodiments, and their functions will not be elaborated here. Reference can be made to the detailed descriptions of the above method embodiments.

[0125] Figure 6 It is a schematic physical structure diagram of an electronic device provided by an embodiment of the present invention. As Figure 6 shown, the electronic device may include: a processor 301, a communication interface 302, a memory 303, and a communication bus 304. Among them, the processor 301, the communication interface 302, and the memory 303 complete communication with each other through the communication bus 304. The processor 301 can call the logical instructions in the memory 303 to execute the method described in any of the above embodiments.

[0126] In addition, when the logical instructions in the above-mentioned memory 303 are implemented in the form of software function units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0127] This embodiment discloses a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments.

[0128] This embodiment provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program causes the computer to execute the methods provided by the above method embodiments.

[0129] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0130] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0131] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that realize the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0132] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0133] In the description of this specification, the description referring to terms such as "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0134] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A performance test method for a heat exchange unit of an air-cooled condenser, characterized in that Including: During a target time period, use an environmental parameter measuring device to measure the environmental parameters of the environment where the heat exchange unit to be measured of the air-cooled condenser is located, and use a pre-arranged heat exchange parameter measuring device to measure the heat exchange parameters of the heat exchange unit to be measured; Determine the heat exchange performance of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters; The number of the heat exchange units to be measured is at least two, and each heat exchange unit to be measured is respectively provided with the heat exchange parameter measuring device, and the heat exchange parameter measuring device of each heat exchange unit to be measured is used to measure the heat exchange parameters of the heat exchange unit to be measured during the target time period; The heat exchange parameter measuring devices provided for each heat exchange unit to be measured are the same, and the arrangement positions of each heat exchange parameter measuring device on the heat exchange unit to be measured are the same; The environmental parameters include environmental temperature, atmospheric pressure, environmental wind speed, and environmental wind direction; The heat exchange parameters include the wind speed and wind temperature at the fan outlet, and the wind speed and wind temperature at the radiator outlet; The environmental parameter measuring device includes a mechanical ventilation psychrometer for measuring environmental temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer and wind vane for measuring environmental wind speed and direction; The heat exchange parameter measuring device includes a first multi-point anemometer and thermometer for measuring the wind speed and wind temperature at the fan outlet, and a second multi-point anemometer and thermometer for measuring the wind speed and wind temperature at the radiator outlet; The measuring points of the first multi-point anemometer and thermometer are arranged on the outlet side of the fan of the heat exchange unit to be measured according to the equal-area ring method; The measuring points of the second multi-point anemometer and thermometer are respectively distributed according to the equal-distance method on the two outlet sides of the radiator of the heat exchange unit to be measured; The determining the heat exchange performance of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters includes: Calculate the air-side heat transfer amount of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters; Draw the wind speed and wind temperature distribution diagrams at the fan outlet and radiator outlet of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters; Determine the heat exchange performance of the heat exchange unit to be measured according to the wind speed and wind temperature distribution diagrams. Specifically, after obtaining the environmental parameters and heat exchange parameters, data processing is performed. Specifically, for each operating condition, the arithmetic mean of the measured values of each parameter under that operating condition is taken as the representative value of that operating condition. Select the data with the error between the air volume at the fan outlet and the air volume at the radiator outlet within 10% as valid data for use. After obtaining the valid data, calculate the air-side heat transfer measurement to evaluate the heat exchange performance of the heat exchange unit to be measured, and evaluate the heat exchange performance of the heat exchange unit to be measured by drawing the wind speed and wind temperature distribution diagrams.

2. The method according to claim 1, characterized in that The number of the heat exchange units to be measured is one, and the using the pre-arranged heat exchange parameter measuring device to measure the heat exchange parameters of the heat exchange unit to be measured includes: Use the pre-arranged heat exchange parameter measuring device to measure the heat exchange parameters of the heat exchange unit to be measured at different fan speeds; The determining the heat exchange performance of the heat exchange unit to be measured according to the measured environmental parameters and heat exchange parameters includes: Determine the heat transfer performance of the heat transfer unit to be measured at different fan speeds according to the measured environmental parameters and the heat transfer parameters.

3. The method according to claim 2, wherein The measuring the heat transfer parameters of the heat transfer unit to be measured at different fan speeds by using a pre-arranged heat transfer parameter measuring device includes: For each test speed, after the fan of the heat transfer unit to be measured has been stably operating at the test speed for a preset duration, use the pre-arranged heat transfer parameter measuring device to measure the heat transfer parameters of the heat transfer unit to be measured at the test speed.

4. The method according to claim 1, characterized in that, The mechanical aspiration psychrometer is arranged at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or The pressure transmitter is arranged on the air-cooled island platform; and / or The anemometer and wind vane are arranged on the boiler roof of the thermal power unit.

5. A performance test system for a heat exchange unit of an air-cooled condenser, characterized in that, It includes: An environmental parameter measuring device for measuring the environmental parameters of the environment where the heat transfer unit to be measured of the air-cooled condenser is located within a target time period; A heat transfer parameter measuring device for measuring the heat transfer parameters of the heat transfer unit to be measured within the target time period; A heat transfer performance determining device, which is respectively connected to the environmental parameter measuring device and the heat transfer parameter measuring device, and is used to determine the heat transfer performance of the heat transfer unit to be measured according to the environmental parameters and the heat transfer parameters; The number of the heat transfer units to be measured is at least two, and each heat transfer unit to be measured is respectively provided with the heat transfer parameter measuring device, and the heat transfer parameter measuring device of each heat transfer unit to be measured is used to measure the heat transfer parameters of this heat transfer unit to be measured within the target time period; The heat transfer parameter measuring devices provided for each heat transfer unit to be measured are the same, and the arrangement positions of each heat transfer parameter measuring device on the heat transfer unit to be measured are the same; The environmental parameters include at least one of the following: environmental temperature, atmospheric pressure, environmental wind speed, environmental wind direction; The heat transfer parameters include at least one of the following: fan outlet wind speed, fan outlet air temperature, radiator outlet wind speed, radiator outlet air temperature; The environmental parameter measuring device includes a mechanical aspiration psychrometer for measuring environmental temperature, a pressure transmitter for measuring atmospheric pressure, and an anemometer and wind vane for measuring environmental wind speed and direction; The heat transfer parameter measuring device includes a first multi-point anemometer and air temperature meter for measuring the fan outlet wind speed and air temperature, and a second multi-point anemometer and air temperature meter for measuring the radiator outlet wind speed and air temperature; The measuring points of the first multi-point anemometer and air temperature meter are arranged on the outlet side of the fan of the heat transfer unit to be measured according to the equal-area ring method; The measuring points of the second multi-point anemometer and air temperature meter are respectively distributed according to the equal-distance method on the two outlet sides of the radiator of the heat transfer unit to be measured; The heat transfer performance determining device is specifically used for: Calculating the air-side heat transfer amount of the heat transfer unit to be measured according to the measured environmental parameters and the heat transfer parameters; Drawing the wind speed and air temperature distribution diagrams at the fan outlet and radiator outlet of the heat transfer unit to be measured according to the measured environmental parameters and the heat transfer parameters; Determine the heat transfer performance of the heat exchange unit to be measured according to the wind speed and wind temperature distribution map. Specifically, after obtaining the environmental parameters and the heat transfer parameters, data processing is carried out. Specifically, for each operating condition, the arithmetic mean of the measured values of each parameter under that operating condition is taken as the representative value of that operating condition. Select the data with the error between the air volume at the fan outlet and the air volume at the radiator outlet within 10% as valid data for use. After obtaining the valid data, evaluate the heat transfer performance of the heat exchange unit to be measured by calculating the air-side heat transfer measurement, and evaluate the heat transfer performance of the heat exchange unit to be measured by drawing the wind speed and wind temperature distribution map.

6. The system according to claim 5, wherein The number of the heat exchange units to be measured is one, and the heat transfer parameter measuring device is specifically used for: measuring the heat transfer parameters of the heat exchange unit to be measured of the air-cooled condenser at different fan speeds within a target time period; The heat transfer performance determining device is specifically used for: determining the heat transfer performance of the heat exchange unit to be measured at different fan speeds according to the measured environmental parameters and the heat transfer parameters.

7. The system according to claim 6, wherein The heat transfer parameter measuring device is specifically used for: for each test speed, after the fan of the heat exchange unit to be measured of the air-cooled condenser runs stably for a preset duration at the test speed, measuring the heat transfer parameters of the heat exchange unit to be measured at the test speed.

8. The system according to claim 5, wherein The mechanical aspiration psychrometer is arranged at a position 1.5 to 2 meters above the ground, with good ventilation and no direct sunlight; and / or The pressure transmitter is arranged on the air-cooled island platform; and / or The anemometer and wind vane is arranged on the boiler roof of the thermal power unit.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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