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Method and device for measuring mixing velocity of gas-liquid two-phase flow of refrigerant

A gas-liquid two-phase flow, refrigeration technology, applied in fluid velocity measurement, measurement device, velocity/acceleration/impact measurement, etc., can solve the problems of gas-liquid two-phase fluid that cannot measure phase change

Active Publication Date: 2012-09-19
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for measuring the mixing velocity of gas-liquid two-phase flow in refrigerant by using the law of momentum, so as to solve the problem that the existing conventional flow rate measurement method cannot measure the gas-liquid two-phase fluid with phase change

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  • Method and device for measuring mixing velocity of gas-liquid two-phase flow of refrigerant
  • Method and device for measuring mixing velocity of gas-liquid two-phase flow of refrigerant
  • Method and device for measuring mixing velocity of gas-liquid two-phase flow of refrigerant

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Embodiment Construction

[0019] The method for measuring the mixing speed of the refrigerant gas-liquid two-phase flow of the present invention is to first measure the fluid mass flow rate m of the refrigerant in the refrigeration circuit and the ejection impact force F of the nozzle outlet, and then according to the formula F=-m(0-V 1 ) = mV 1 Calculate the average mixing velocity V of the refrigerant 1 . Wherein, the fluid mass flow m of the refrigerant is calculated by detecting the volume flow, pressure and temperature of the refrigerant at the inlet side of the nozzle. This calculation method is a prior art and will not be repeated here. Nozzle outlet jet impact force F is a electromechanical sensor component installed at the nozzle exit to detect the nozzle jet impact force. The electromechanical sensor component is affected by the nozzle impact force and converts the pressure signal into an electrical signal and then inputs it to the computer through the AD conversion circuit. obtained after ...

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Abstract

The invention provides a method for measuring the mixing velocity of gas-liquid two-phase flow of a refrigerant, and a matched measuring device. The method comprises the following steps of: measuring the fluid mass flow m of the refrigerant in a refrigeration circuit and the jet impact force of a nozzle outlet, and calculating the average mixing velocity V1 of the gas-liquid two-phase flow which is sprayed by a nozzle and has phase change according to the law of momentum. The measuring method is simple and practical, the influence of a structural parameter of the nozzle on outlet velocity and the energy conversion efficiency of the nozzle can be further studied according to data obtained by studying the mixing velocity of the gas-liquid two-phase flow at the nozzle outlet, the design parameter of the gas-liquid two-phase flow nozzle is optimized, and the efficiency of the whole refrigeration cycle is improved.

Description

technical field [0001] The invention relates to a gas-liquid two-phase flow mixing velocity measurement method for studying the mixing velocity of a gas-liquid two-phase fluid in a mass transfer process in a refrigerant, and a gas-liquid two-phase flow mixing velocity measurement method specially used for implementing the method device. Background technique [0002] In the ejection refrigeration system and the vapor compression refrigeration system that adopts the speed expander to recover the energy loss of the throttling valve, the nozzle is one of the core components and plays a key role in energy conversion. In the process of converting the high-pressure refrigerant flowing through the nozzle into low-pressure refrigerant, the nozzle converts this part of the pressure energy into the kinetic energy of the refrigerant, and then the expander impeller recycles this part of the fluid kinetic energy to improve system performance. Purpose. Therefore, the mixing velocity of t...

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Application Information

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IPC IPC(8): G01P5/00G01M10/00G01L5/00
Inventor 贺滔刘艳许伟春王志远罗浩梁坤峰
Owner HENAN UNIV OF SCI & TECH
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