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An Optimal Control Method for the Operating Range of the Injector

An optimized control and ejector technology, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high operating cost and performance degradation of ejectors, and achieve the effect of improving energy efficiency and stability

Active Publication Date: 2019-07-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The operating mode of the injector is greatly affected by the primary pressure, the higher the primary pressure, the higher the operating cost of the injector, and its performance will decrease

Method used

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  • An Optimal Control Method for the Operating Range of the Injector
  • An Optimal Control Method for the Operating Range of the Injector
  • An Optimal Control Method for the Operating Range of the Injector

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Embodiment Construction

[0050] The present invention is described in detail below in conjunction with accompanying drawing:

[0051] An optimal control method for an injector operating range, comprising the following steps:

[0052] (1) The relationship between the injector primary flow pressure and the critical back pressure is approximated as a proportional linear relationship, wherein the proportional coefficient is K, the unknown constant is B, and the least square method is used to determine the K value and the B value;

[0053] (2) According to the critical back pressure value, the optimal primary flow pressure value of the corresponding injector is obtained;

[0054] (3) Define the proportional coefficient K* at the critical point of the injector;

[0055] (4) Proportional coefficient K s It is the setting multiple of the proportional coefficient K*, according to the proportional coefficient K* and the proportional coefficient K s Divide the working area of ​​the injector into three parts; ...

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Abstract

An optimization control method for running interval of an ejector, comprising the following steps: approximating the relation between primary flow pressure of an ejector and critical back pressure to a directly proportional linear relation, and determining a proportionality coefficient K* at a critical point of the ejector according to an optimal primary flow pressure value; dividing a working interval of the ejector into three parts according to the proportionality coefficient K* and a proportionality coefficient Ks; determining a working state of the ejector according to the working interval where the proportionality coefficient K of the ejector is located during practical work, and allowing the ejector to work at a stable running state by means of adjusting a pressure occurrence value.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to an optimal control method for an ejector operating range. Background technique [0002] In the ejector refrigeration system, the ejector replaces the compressor in the traditional refrigeration system and is a key component in the ejector refrigeration system. An ejector is a device that mixes two fluids of different pressures and exchanges energy to form a mixed fluid of intermediate pressure. It does not directly consume mechanical work or electric energy to increase fluid pressure, temperature and other parameters. It has a simple structure, low cost, and no moving parts, and is suitable for use in any flow pattern including two-phase flow. Ejectors have long been used in refrigeration systems driven by low-grade heat sources, and are a good way to recover energy in places with waste heat. [0003] The injector usually consists of four parts: the main nozzle, the recei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/08F25B49/02
CPCF25B9/08F25B49/02
Inventor 王雷侯文秀王辰赵红霞
Owner SHANDONG UNIV