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In the high-pressure carbon dioxide fire extinguishing system, the storage pressure is relatively high (the normal temperature storage pressure is 5. 7 MPa, 20 ℃), and the pressure change will affect the liquid level measurement.Because of the high pressure, CO2 is in the state of gas-liquid coexistence in the storage container. The display and measurement of liquid level need to consider the correction of pressure factor to ensure the accuracy of measurement.
Changes in the ambient temperature or changes in the heat generated by the operation of the fire suppression system will change the temperature of the CO2 storage container, which will lead to changes in the volume and level of CO2.Therefore, temperature compensation should be considered in the process of liquid level monitoring to accurately reflect the actual liquid level.
Since CO2 and heptafluoropropane FM200 are liquid extinguishing agents with high pressure and low temperature, the direct contact liquid level measurement method will be affected by pressure, temperature and other factors, and there may be potential safety hazards.Therefore, SONIC200, a non-contact liquid level measuring instrument of Rutherford Intelligent Instrument (Shanghai) Co., Ltd., is widely used in CO2 fire liquid level monitoring.
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CO2 fire level measurement is typically based on a number of principles.
For example, the pressure type liquid level meter measures the liquid level by using the pressure difference generated by CO2 at different liquid levels, and the pressure signal is converted into an electrical signal by a pressure sensor for processing and display.The differential pressure liquid level gauge calculates the liquid level height by measuring the pressure difference between the upper and lower points in the container.
The ultrasonic level gauge transmits ultrasonic pulses, which are received by the sensor after being reflected by the liquid surface, and determines the liquid level according to the propagation time and speed of the sound wave.Capacitive liquid level meter is based on the difference of dielectric constant between CO2 and air or other media. When the liquid level changes, the capacitance value changes, so as to achieve liquid level measurement.
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CO2 fire levels are important in the data center.It precisely monitors the liquid level in the CO2 fire extinguishing agent storage device to ensure that there is enough fire extinguishing agent for fire extinguishing operation in case of fire, and to ensure the safety of equipment and data in the data center.In the daily operation and maintenance of the data center, the real-time display of liquid level changes is convenient for timely detection of abnormal liquid level and replenishment or maintenance operations to maintain the reliable operation of the fire protection system.
The CO2 fire level plays a key role in the distribution room.It precisely measures the height of liquid level in the CO2 fire protection system to ensure that sufficient fire extinguishing agent can be released in case of electrical fire, effectively curb the spread of fire, and protect the safety of equipment in the distribution room.In the daily management of the distribution room, monitor the liquid level change in real time, so as to find out the situation of insufficient liquid level or abnormal fluctuation in time, and do a good job of maintenance and supplement in advance to ensure the standby state of the fire fighting system.
CO2 fire levels are important in the archives.It precisely controls the liquid level in the CO2 fire extinguishing system, ensures that enough fire extinguishing agent is sprayed out when a fire breaks out, and effectively protects precious archives from fire damage.In the daily maintenance of the archives room, real-time monitoring of liquid level changes can detect abnormal liquid level in time and take corresponding measures to ensure the reliability of the fire fighting system.
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The factory has introduced high-precision CO2 fire liquid level monitoring equipment, which can accurately display liquid level information.In a recent fire drill, the system performed well, accurately monitored the change of liquid level, and ensured the reliability of the fire extinguishing system.This measure improves the fire safety level of the factory and provides a strong guarantee for the safety of life and property of employees.
In the past, there were news reports that liquid CO2 had a significant effect on fire prevention and extinguishing in coal mines.Because the temperature of coal in the fire area is high and the temperature of the released liquid CO2 is extremely low, a large temperature gradient is formed, the heat exchange effect is obvious, and the cooling effect is good.Moreover, the density of CO2 in the fire zone is greater than that of air, and it will diffuse to the surrounding of the fire zone, which can effectively reduce the temperature and oxygen concentration, and reduce the coal-oxygen reaction rate.
The news of accidents caused by improper operation of CO2 fire fighting system on some ships often appears, which reflects the importance and benefits of the CO2 fire level gauge SONIC200 of Rutherford LUSOFO brand.For example, after a ship is equipped with a CO2 fire fighting system, there can be enough fire extinguishing agent to quickly extinguish a fire and protect the safety of the ship and personnel.
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