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Refrigerant leakage detection method and refrigerant leakage detection system

A leakage detection and refrigerant technology, which is applied in the direction of measuring the increase and decrease rate of the fluid, and using the liquid/vacuum degree to measure the liquid tightness, etc., can solve the problems of high cost and false alarms

Inactive Publication Date: 2022-07-22
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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Problems solved by technology

This method needs to arrange a large number of concentration meters, and the cost of halogen or freon concentration meters is high, and there is also a risk of false alarms, and some economic and reliability problems are faced in application

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  • Refrigerant leakage detection method and refrigerant leakage detection system
  • Refrigerant leakage detection method and refrigerant leakage detection system
  • Refrigerant leakage detection method and refrigerant leakage detection system

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[0058] The latent heat of vaporization of common refrigerants is about 200KJ / Kg. When the leakage of refrigerant is 0.005Kg / S, the latent heat of vaporization released is 1kJ.

[0059] Under one atmospheric pressure, the absolute humidity is 12g / kg and the relative humidity is 60%. Taking a 2U node with a total heat dissipation of 5KW as an example, the mass air volume is 0.05Kg / S (air cooling accounts for 20%). The enthalpy value of the tuyere is about 20KJ / Kg higher than that of the inlet, and the relative humidity is 40% lower.

[0060] When the above-mentioned amount of refrigerant leaks, the latent heat of vaporization of 1KJ will reduce the air enthalpy by about 20KJ / Kg, which will cause the node outlet enthalpy to be the same as the inlet enthalpy, and the inlet and outlet relative humidity to be the same. Through such a detection method, the leakage amount of the system and the location of the leakage node can be accurately detected, and then feedback to the monitoring...

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Abstract

The invention provides a refrigerant leakage detection method, which comprises the following steps: calculating a theoretical enthalpy difference value by using an air cooling load and an airflow flow, obtaining an air pressure value p and an absolute moisture content d or a dry-bulb temperature t of an environment, obtaining a relative humidity RH of a detection point, obtaining an enthalpy value h, and calculating an actual enthalpy difference value between an air inlet and an air outlet according to the enthalpy value h; the leaked refrigerant causes the change of the enthalpy value of the air and the corresponding change of the relative humidity, resulting in the difference between the actual enthalpy difference value and the theoretical enthalpy difference value, comparing the difference value between the theoretical enthalpy difference value and the actual enthalpy difference value, judging whether the difference value exceeds a set threshold value or not, and if yes, indicating that leakage occurs. According to the method, whether leakage occurs or not is indirectly judged according to the influence of the leaked refrigerant on the relative humidity, only temperature detection or absolute moisture content detection and relative humidity detection are needed, the cost is lower, and the detection sensitivity is higher. The invention further provides a refrigerant leakage detection system which can achieve the technical effects.

Description

technical field [0001] The invention relates to the field of cooling detection, and further relates to a refrigerant leakage detection method. In addition, the present invention also relates to a refrigerant leakage detection system. Background technique [0002] With the implementation of the national big data strategy and the national strategy to accelerate the construction of a digital China, cloud computing and big data are flourishing, the explosive growth of data volume has promoted the rapid development of the data center development market, but its construction has always been subject to environmental issues such as excessive energy consumption Troubled, the Ministry of Industry and Information Technology and several major cities in my country have clearly stipulated the PUE of new data centers, and the construction of green data centers is an inevitable trend of its development. In order to meet the growing demand for computing power, the power density of a single c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26
CPCG01M3/26
Inventor 朱欢来
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD