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Performance test analysis method for non-azeotropic refrigerant frequency conversion freezing and refrigerating system

A technology for testing analysis and system performance, applied in the testing of machine/structural components, measuring devices, instruments, etc., can solve problems such as single consideration

Pending Publication Date: 2021-11-30
NANJING NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only a method to study the determination of the optimal charge of refrigerant at a fixed frequency. Considering a single

Method used

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  • Performance test analysis method for non-azeotropic refrigerant frequency conversion freezing and refrigerating system
  • Performance test analysis method for non-azeotropic refrigerant frequency conversion freezing and refrigerating system
  • Performance test analysis method for non-azeotropic refrigerant frequency conversion freezing and refrigerating system

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Embodiment 1

[0051] A performance test and analysis method for an inverter refrigeration system using R448 zeotropic refrigerant, such as figure 1 shown, including the following steps:

[0052] S1. According to the frequency conversion range of the frequency conversion refrigeration system, the cooling capacity required by the cold storage and the climate conditions in the area, set the representative frequency of the compressor of the frequency conversion refrigeration system and formulate the environmental working conditions of the frequency conversion refrigeration system; in this embodiment Three representative frequencies of 90Hz, 60Hz, and 40Hz are selected, and four environmental conditions are selected according to 5°C, 32°C, 15°C, and 25°C.

[0053] S2. At 32°C, use manual debugging to adjust the operating frequency of the inverter refrigeration system to 90Hz, and carry out the R448A refrigerant charging experiment. R448A undercharges from 0kg, and monitors the changes in the co...

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Abstract

The invention belongs to the technical field of refrigeration equipment, and particularly relates to a performance test analysis method for a non-azeotropic refrigerant frequency conversion freezing and refrigerating system. The method comprises the following steps of firstly, setting a representative frequency of a frequency conversion system and formulating an environment working condition, and under a certain working condition, selecting a representative frequency and filling a refrigerant to obtain a corresponding general filling interval, performing feedback adjustment on the general filling interval according to a performance test result of the frequency conversion system to obtain a corresponding optimal filling interval, calculating an optimal performance parameter range of the frequency conversion system under a selected working condition according to the running time ratio of each representative frequency, and finally, changing the working conditions, and after repeated testing, calculating the annual operation performance of the frequency conversion system according to the time proportion of each working condition in one year. The optimal refrigerant filling amount and corresponding performance parameters are tested according to different operation frequencies of the frequency conversion freezing and refrigerating system, the performance of the frequency conversion unit under different operation conditions is comprehensively considered, and the performance of the frequency conversion freezing and refrigerating system is tested in a more accurate mode.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a method for testing and analyzing the performance of a non-azeotropic refrigerant frequency conversion refrigeration system. Background technique [0002] With the increasingly severe energy situation, researchers continue to conduct research on environmentally friendly refrigerants, expecting to use refrigerants with ODP (Ozone Destruction Index) close to 0 and GWP (Global Warming Index) as low as possible to achieve refrigeration unit performance. Aim as high as possible. The EU standard with the significance of wind vane has set a relatively strict timetable for energy efficiency improvement for low-GWP refrigerants, hoping to meet the ecological design requirements of refrigeration equipment as soon as possible. Non-azeotropic mixed refrigerants generally have low ODP and GWP values, and their low flammability, good safety performance and environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/002G01M99/008
Inventor 邓青青张忠斌赵娟汪庆
Owner NANJING NORMAL UNIVERSITY
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