a transcritical co 2 Evaluating Method of Efficiency of Ejector Diffuser Chamber in Refrigeration Cycle

A technology of refrigeration cycle and evaluation method, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as unreliability, turbulent mixing process of ejector, friction loss congestion, and difference

Active Publication Date: 2017-03-29
GUANGXI UNIV
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Problems solved by technology

[0004] When most researchers analyze, it is assumed that in the injector, the ideal circulation process is the same as the outlet pressure of the injector diffuser chamber in the actual circulation process; however, there are factors such as complex turbulent mixing process, friction loss and choking phenomenon inside the injector , the outlet pressure of the injector diffuser chamber in the actual cycle process will be different from the ideal cycle process ejector diffuser chamber outlet pressure
Therefore, the traditional evaluation of transcritical CO is based on the same condition of the outlet pressure of the injector diffuser chamber in the ideal cycle process and the actual cycle process. 2 The evaluation results of the diffuser chamber efficiency of the ejector in the refrigeration cycle are not reliable enough

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  • a transcritical co <sub>2</sub> Evaluating Method of Efficiency of Ejector Diffuser Chamber in Refrigeration Cycle
  • a transcritical co <sub>2</sub> Evaluating Method of Efficiency of Ejector Diffuser Chamber in Refrigeration Cycle
  • a transcritical co <sub>2</sub> Evaluating Method of Efficiency of Ejector Diffuser Chamber in Refrigeration Cycle

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Embodiment Construction

[0042] The method of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] like figure 1 As shown, the transcritical CO 2 The working process of the vapor compression / jet refrigeration system is:

[0044] High pressure CO in thermodynamic state from the gas cooler 2 The gas enters the injector from the working fluid inlet 1, depressurizes and speeds up through the nozzle to the actual state outlet 2 (ideal cycle process isentropic expansion to the ideal state outlet 2s), when the pressure energy is converted into kinetic energy, the saturation from the evaporator outlet The steam is injected from the injection fluid inlet 3 to the mixing chamber inlet 4 of the suction chamber through the injection nozzle, and then isobarically mixed with the working fluid in the mixing chamber and enters the diffusion chamber inlet 5; then the mixed fluid is boosted to The actual state outlet 6 of the injector (ideal cycle process isen...

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Abstract

The invention discloses an evaluation method for the efficiency of a pressure expanding chamber of an ejector in transcritical CO2 refrigeration circulation. According to the method, the pressure coefficient is used for evaluating the efficiency of the pressure expanding chamber of the ejector; the pressure coefficient is shown on the basis of inlet and outlet pressure of the pressure expanding chamber, an expression formula of the pressure coefficient is shown as the accompanying drawing, in the formula, the p is the outlet pressure of the pressure expanding chamber of the ejector in the practical circulation process, the p<s> is the outlet pressure of the pressure expanding chamber of the ejector in the ideal circulation process, and the p<e> is the inlet pressure of the pressure expanding chamber of the ejector. The method has the advantages that the pressure coefficient is adopted for evaluating the efficiency of the pressure expanding chamber of the ejector, the measurement is more convenient, in addition, the work for evaluating the pressure expanding chamber of the ejector is more accurate, and the flowing chocking phenomenon inside the ejector is more accurately explained.

Description

technical field [0001] The invention relates to a method for evaluating the working efficiency of a diffuser chamber of an injector, in particular to a transcritical CO 2 Method for evaluating the efficiency of the diffuser chamber of the ejector in the refrigeration cycle. Background technique [0002] Due to energy shortage and serious environmental pollution, it is imperative to seek various environmentally friendly and sustainable energy sources and develop energy-saving technologies. CO 2 Because of its unique thermophysical properties and environmental friendliness, it has attracted the attention of many scholars. However, because its critical temperature is only 31.1°C, the pressure difference between the high and low pressure sides of the transcritical circulation system formed by it will reach 7MPa, and the superheat loss and throttling loss are relatively large. Among them, how to reduce system throttling loss becomes to improve CO 2 An important research conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 黄惠兰李刚韩美健
Owner GUANGXI UNIV
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