Method for arranging uniform-speed pipe flow meter in variable-air-volume air conditioner terminal unit

Abstract

The invention discloses an arrangement method of a uniform-speed pipe flowmeter for measuring the air supply volume of a variable-air-volume air conditioner terminal unit, which comprises the following steps of: S1, performing computer modeling simulation on the terminal unit to obtain the characteristics of an air flow field in an air duct; selecting an m * n position array in the air duct as a preset position of the flow meter; s2, respectively performing calculating according to the preset height of the flowmeter, and comparing the consistency of the airflow velocity distribution curve andthe theoretical wind speed value on the section of the same height to obtain a corresponding optimal horizontal position; and S3, based on the optimal layout position, taking the intersection point ofthe airflow speed distribution curve and the theoretical air speed value under the preset air volume as a measuring hole of the flow meter, comparing the average relative error between the speed measurement value and the theoretical air speed value under other air volumes, and determining the optimal layout scheme. The whole process information of air flowing through the variable-air-volume air conditioner terminal unit is obtained through the computer simulation technology, accurate measurement of the air supply volume of the terminal unit is achieved, and the regulation and control performance of operation of the variable-air-volume air conditioner system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of air volume measurement and regulation of a variable air volume air-conditioning system, in particular to a method for laying a uniform velocity tube flowmeter in a terminal unit of a variable air volume air conditioner. Background technique [0002] In the technical field of air volume measurement and control of variable air volume air conditioning systems, the average velocity tube flowmeter is a flow sensor arranged in the air duct at the rear of the terminal unit. The deviation value between them, and then adjust the air valve opening, compensate or reduce the air supply volume. In the actual operation of the variable air volume air conditioning system, the terminal unit will fail to regulate when the air volume is low, and even be accompanied by turbulent vibration and noise. Therefore, improving the sensing characteristics (linearity, sensitivity, accuracy, etc.) of the averaging tube flowmeter in t...

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Problems solved by technology

[0003] The traditional experimental method has problems such as high cost of trial production, long time-consuming, heavy experimental workload, low efficiency, and inability or difficulty to present the flow details of the airflow.

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