Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner
Fine particulate matter (PM) is associated with an increased risk of respiratory and cardiovascular diseases. Fine PM absorbs water molecules at high relative humidity, and then their size grows. Such hygroscopic growth causes a large error when monitoring PM concentrations. To lower the relative hu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/5/1950 |
| _version_ | 1797473690599817216 |
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| author | Sung Hoon Baek |
| author_facet | Sung Hoon Baek |
| author_sort | Sung Hoon Baek |
| collection | DOAJ |
| description | Fine particulate matter (PM) is associated with an increased risk of respiratory and cardiovascular diseases. Fine PM absorbs water molecules at high relative humidity, and then their size grows. Such hygroscopic growth causes a large error when monitoring PM concentrations. To lower the relative humidity, monitors use an indirect heating device, which is large and consumes large amounts of power. The problem with conventional particle separators is that their efficiency depends on temperature and humidity, and their traditional structure, which lets air flow downward. As such, this paper addresses these problems and presents a PM monitor with a new type of dryer that is free from these problems. The proposed monitor requires less energy and has an efficient dehumidifier and a new structure in which air flows upward. The presented experiments were conducted to compare the proposed device with a reference monitor managed by a governmental institute, and to evaluate the effect of the dehumidifier, the relative precision of the proposed devices, and the correlation with the reference monitor. The experimental results showed that the proposed monitor satisfies the U.S. EPA indicators for class III monitors. |
| first_indexed | 2024-03-09T20:20:02Z |
| format | Article |
| id | doaj.art-0a18c9efe1c54d42bdc1c8f024073667 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T20:20:02Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0a18c9efe1c54d42bdc1c8f0240736672023-11-23T23:48:52ZengMDPI AGSensors1424-82202022-03-01225195010.3390/s22051950Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol ConditionerSung Hoon Baek0Gonggam Sensors Co., Ltd., Daejeon 34129, KoreaFine particulate matter (PM) is associated with an increased risk of respiratory and cardiovascular diseases. Fine PM absorbs water molecules at high relative humidity, and then their size grows. Such hygroscopic growth causes a large error when monitoring PM concentrations. To lower the relative humidity, monitors use an indirect heating device, which is large and consumes large amounts of power. The problem with conventional particle separators is that their efficiency depends on temperature and humidity, and their traditional structure, which lets air flow downward. As such, this paper addresses these problems and presents a PM monitor with a new type of dryer that is free from these problems. The proposed monitor requires less energy and has an efficient dehumidifier and a new structure in which air flows upward. The presented experiments were conducted to compare the proposed device with a reference monitor managed by a governmental institute, and to evaluate the effect of the dehumidifier, the relative precision of the proposed devices, and the correlation with the reference monitor. The experimental results showed that the proposed monitor satisfies the U.S. EPA indicators for class III monitors.https://www.mdpi.com/1424-8220/22/5/1950particulate matterPMmonitorsensortiny aerosol conditionerlight scattering |
| spellingShingle | Sung Hoon Baek Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner Sensors particulate matter PM monitor sensor tiny aerosol conditioner light scattering |
| title | Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner |
| title_full | Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner |
| title_fullStr | Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner |
| title_full_unstemmed | Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner |
| title_short | Energy-Efficient Monitoring of Fine Particulate Matter with Tiny Aerosol Conditioner |
| title_sort | energy efficient monitoring of fine particulate matter with tiny aerosol conditioner |
| topic | particulate matter PM monitor sensor tiny aerosol conditioner light scattering |
| url | https://www.mdpi.com/1424-8220/22/5/1950 |
| work_keys_str_mv | AT sunghoonbaek energyefficientmonitoringoffineparticulatematterwithtinyaerosolconditioner |