Experimental study and evaluation of environmental adaptability of domestic combustible gas detectors
[Objective]Methane as a common combustible gas notably threatens the life and property of people living in residential buildings in case leaks are not promptly controlled,potentially resulting in serious gas explosion accidents.In the modern households,the kitchen environment is often complex,laden with factors such as substantial amounts of oil fumes,water vapors,and other impurities.These factors may adversely affect the performance of household gas detectors,thereby decreasing their accuracy in detection of combustible gas leaks.Therefore,for precise detection of household combustible gas leaks,appropriate detectors should be studied and evaluated vis-à-vis their adaptability to various complex kitchen environments and long-term operational reliability.This study aims to thoroughly investigate the performance of household combustible gas detectors in complex environments such as those in kitchens and assess their long-term reliability,which holds considerable practical importance in enhancement of household safety levels and prevention of gas leakage accidents.[Methods]This study establishes a comprehensive performance testing platform for household combustible gas detectors by means of several equipment,namely a circular high-low temperature and humidity test chamber,an oil fume generation device,and a water vapor generation device.This platform overcomes the limitations of traditional experimental systems with only single environmental factors,enabling simulation of application scenarios of household combustible gas detectors under the coupled effects of multiple environmental factors.Aiming at ensuring the accuracy and authority of the experiments,we refer to the standard method GB15322.2-2019"Part 2:Household Combustible Gas Detectors"for testing four types of household combustible gas detectors(semiconductor type,catalytic combustion type,infrared absorption type,and laser type)in single environments such as high-low temperature,oil fume,water vapor,or dust,as well as in coupled environments such as those with high-temperature oil fume and those with oil fume plus ethanol.Through the experimental data,critical indicator parameters(such as average error of alarm action values and relative error of alarm action values)are analyzed for the four different operational principle types of household combustible gas detectors.Performance of the combustible gas detectors is evaluated based on these analytical results.[Results]The experimental results indicate that the sensitivity of semiconductor detectors is notably affected by the adsorption and surface reactions of interfering substances,with alarm value errors reaching 5.74%lower explosive limit(LEL)in oil fume environments and 7.48%LEL and 6.84%LEL in each of two coupled environments.Catalytic combustion detectors are sensitive to environmental factors such as temperature and oxygen concentration.Infrared absorption detectors experience false alarms in water vapor environments.Laser detectors exhibit stable output power and wavelength over a long period and achieve the highest score of 85 points in household scenario evaluations.Moreover,we propose a quantitative evaluation parameter,referred to as relative error of alarm action values(Srel),for detector performance assessment,addressing the gap in domestic quantitative evaluation of combustible gas detectors.[Conclusions]This study conducted simulated kitchen environment experiments to elucidate the performance of household combustible gas detectors under different environmental conditions.Laser-type combustible gas detectors exhibited the best performance in household scenarios,followed by the infrared absorption and catalytic combustion types,while semiconductor detectors performed relatively poorer.This research provided experimental evidence for increasing the accuracy and reliability of household gas detectors and offered a method for their performance evaluation in China,which holds notable practical implications for enhancing home gas safety.
residential combustible gas detectorenvironmental adaptabilitykitchen environmentalarm action valueperformance evaluation removal
万方数据
维普
