Novel method and system for measuring fan delivery
A fan air volume and fan technology, applied in the direction of measuring devices, measuring flow/mass flow, liquid/fluid solid measurement, etc., can solve problems such as unreasonable installation position, dust blockage of sampling pipe, and installation space limitation, etc., to achieve convenient operation, Effect of avoiding interference and reducing measurement cost
Inactive Publication Date: 2016-09-07
CHANGAN YIYANG POWER GENERATING CO LTD
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Problems solved by technology
[0003] In practical applications, due to the limited installation space, unreasonable installation location, uneven flow velocity field in the air duct, and dust blockage of the sampling tube, etc., the stability is poor and the measurement error is large.
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0017] A new fan air volume measurement method, based on the fan characteristic curve, collecting historical data during the operation of the fan to calibrate the air volume coefficient in the fan air volume theoretical calculation formula, using the real-time measured fan outlet static pressure P, rotor blade opening α and The motor current I of the fan is substituted into the calibrated fan air volume calculation formula to calculate the air volume and complete the measurement of the fan air volume.
[0018] The calibration of the air volume coefficient refers to the use of standard measuring instruments to measure the air volume of the fan under various working conditions, record the static pressure P of the fan outlet and the opening of the moving blade α under each working condition, and measure the motor current value of the fan , according to the...
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The invention discloses a novel method and system for measuring fan delivery. According to a fan characteristic curve, historical data during fan operation is collected and fan delivery coefficients in a fan delivery theoretical calculation formula are calibrated; The fan delivery value is calculated and obtained by substituting real time measured fan outlet static pressure P, movable vane opening [alpha], and fan electric current I to the calibrated fan delivery calculation formula, and therefore, the measurement of fan delivery is completed. According to the method, by means of reliable measurement data of the fan and an interpolation method, the calibration values of fan delivery coefficients corresponding to different working conditions are calculated, and the calculation results are accurate and calculation process is simple; By means of the method for calculating fan delivery, the interference on fan delivery measuring devices in the prior art is avoided; the overall system has simple structure, easy operation and lower measurement cost.
Description
technical field [0001] The invention belongs to the field of air volume measurement, and in particular relates to a novel fan air volume measurement method and system. Background technique [0002] At present, the air flow measurement device of fan generally adopts the principle of differential pressure, and the selection of equipment is mainly based on differential pressure sampling and differential pressure measurement products. The measurement principle is: a set of sensors is inserted in the pipeline, when the fluid flows through the sensor, a high pressure distribution area is generated on the front windward side of the sensor, and a low pressure distribution area is generated at the rear, the high and low pressure areas of the sensor have a certain Multiple pairs of pressure-taking holes arranged regularly measure the total pressure P1 and static pressure P2 of the fluid respectively, respectively introduce P1 and P2 into the differential pressure transmitter, and meas...
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IPC IPC(8): G01F1/00
CPCG01F1/00
Inventor 邓高俊占浩李宁龙江
Owner CHANGAN YIYANG POWER GENERATING CO LTD