气候变化领域集成服务门户(CCPortal): ‘Envilution™’ chamber for performance evaluation of low-cost sensors

CCPortal

DOI	10.1016/j.atmosenv.2020.117264
	‘Envilution™’ chamber for performance evaluation of low-cost sensors
	Omidvarborna H.; Kumar P.; Tiwari A.
发表日期	2020
ISSN	1352-2310
卷号	223
英文摘要	The emergence of low-cost sensors (LCSs) has rapidly changed the landscape of air pollution monitoring. Unlike regulatory standards with comprehensive processes for performance evaluation and certification for reference equipment, no accreditations or regulatory standards exist for LCSs. Hence, calibration and performance assessment of the LCSs are carried out via co-location experiments with reference instruments under limited ranges of environmental conditions and pollutant concentrations. We designed and tested an environmental-pollution (referred to as ‘Envilution™’) chamber to generate controlled environment for temperature and relative humidity (RH) along with different concentrations of particles so that varied real-world environmental conditions and pollution concentrations can be generated for the performance evaluation of LCSs. The custom-made 125L Envilution™ chamber consists of a humidifier/dehumidifier system, heat pump, particulate matter (PM) generator, a connection for gaseous air pollutants and reference measuring instruments. In the experiments under controlled conditions, the chamber was able to maintain diverse ambient and indoor environmental conditions (temperature range from 5 to 40 °C and RH from 10 to 90%) and stable pollutant concentrations, thereby enabling the use of chamber as a reference environment for LCSs' testing. For demonstration, the assessment was conducted based on temperature/RH (HDC1000 digital) and PM2.5 (HPMA115S0 Honeywell) sensors. A Vaisala HMT120 temperature/RH sensor and optical particle counter (Grimm EDM 107) were employed as reference instruments. The evaluation of LCSs, which were placed inside small enclosure kits, showed excellent correlation for temperature (R2 > 0.96), RH (R2 = 0.99), and PM2.5 (R2 = 0.97) with the reference instruments. The LCSs also demonstrated high linearity agreement (R2 > 0.98) among themselves at temperature (5–35 °C), RH (20–80%), PM2.5 (65–200 μg/m3) measurement ranges. The unique features of the chamber, including affordable cost, small size and lightweight, low maintenance/operational costs and ease of operation, has the potential to make it an on-demand package for LCSs' testing. © 2020 Elsevier Ltd
关键词	Air quality measurement Environmental-pollution chamber Gaseous/particle pollutants Low-cost sensors Performance evaluation
语种	英语
scopus关键词	Air quality; Costs; Environmental testing; Humidity control; Pollution control; Air quality measurements; Environmental pollutions; Gaseous/particle pollutants; Low-cost sensors; Performance evaluation; Quality control; air quality; air sampling; atmospheric pollution; certification; cost analysis; flux chamber; linearity; operations technology; particulate matter; performance assessment; relative humidity; sensor; air pollutant; Article; calibration; concentration (parameter); controlled study; environmental temperature; measurement; particulate matter; priority journal
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249341
作者单位	Global Centre for Clean Air Research (GCARE), Department of Civil and Environmental Engineering, Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom; Department of Civil, Structural & Environmental Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
推荐引用方式 GB/T 7714	Omidvarborna H.,Kumar P.,Tiwari A.. ‘Envilution™’ chamber for performance evaluation of low-cost sensors[J],2020,223.
APA	Omidvarborna H.,Kumar P.,&Tiwari A..(2020).‘Envilution™’ chamber for performance evaluation of low-cost sensors.ATMOSPHERIC ENVIRONMENT,223.
MLA	Omidvarborna H.,et al."‘Envilution™’ chamber for performance evaluation of low-cost sensors".ATMOSPHERIC ENVIRONMENT 223(2020).