Low-Cost Air Purifier Prototype Using a Ventilating Fan and Pump Against Haze Pollution

Jumlongkul, Arnon

doi:10.1007/s41810-022-00152-7

Cited by 5 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An air filter capable of providing purified air has been employed across diverse domains, including dust respirators (Chen et al2012;Dosman et al 2000;Johnson 2016) and air conditioning systems (Gaston et al 2021, Hamada and Fujita 2002, Jumlongkul 2022). The paramount performance of an air filter is the filtering efficiency, which quantifies the extent to which airborne particulate matter is eliminated.…”

Section: Introductionmentioning

confidence: 99%

Prediction of filtering efficiency of an air filter by using light shading rate

Sekiguchi,

toyama,

Zama

2023

Preprint

View full text Add to dashboard Cite

There have been some studies on the theoretical formula for predicting the filtering efficiency of an air filter; however, accurate predictions remain challenging even today. Measurement of the filtering efficiency of an air filter requires multiple devices, including compressed air, a particle generator, and a particle counter. Therefore, utilizing easily measurable performance parameters for prediction is advantageous as it eliminates the need for measuring equipment, resulting in significant cost reduction. This study focuses on the light shading rate (LSR) as a readily measurable parameter that potentially correlates with filtering efficiency. To predict filtering efficiency, an empirical formula using LSR was attempted to be developed. Four types of test filters were produced using glass wool with different fiber diameters (df) as materials. The packing density (a), thickness (T), LSR, and filtering efficiency were measured and analyzed. In modeling LSR, the number of fibers (Nf) for thickness direction was obtained by calculating the inter-fiber distance (Di) using the packing density and the fiber diameter. The LSR per fiber (LSR/Nf) was determined based on the number of fibers (Nf). To assess the validity of the experimental formula for LSR, calculated and actual LSR values were compared, demonstrating a high level of agreement. Additionally, an experimental formula was constructed to predict the filtering efficiency based on the correlation between the LSR and the filtering efficiency. The experimental formula for predicting filtering efficiency also exhibited a high level of agreement, affirming the effectiveness of utilizing LSR for predicting the filtering efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

Prediction of filtering efficiency of an air filter by using light shading rate

Sekiguchi,

toyama,

Zama

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…But despite effectiveness, HEPA-based multilayer filtration may be prohibitively expensive for some families due to the high maintenance cost (Allen and Barn, 2020). Low and middleincome countries, where novel technologies are limited, more effective and alternative high-performance household air cleaning options, may provide low-cost health hazard protection (Jumlongkul, 2022).…”

Section: Introductionmentioning

confidence: 99%

Removal of incense smoke and corollary particulate matter using a portable bipolar air ionizer in an unventilated setup

Gupta,

Agarwal,

Singhal

et al. 2023

Front. Environ. Sci.

View full text Add to dashboard Cite

Introduction: Indoor air pollution-associated health risk is substantially higher than outdoor. Incense smoke represents a group of multiple hazardous air pollutants including particulate matter. Bipolar air ionizers have been one of the most escalated indoor air cleaning options in recent years. Albeit, removal efficiency against incense smoke and potential byproduct ozone have been little understood due to limited studies.Method: The present study assessed a portable needlepoint technology-based bipolar air ionizer’s removal efficacy against incense smoke in unventilated glass boxes (size 0.16 m3). A series of experiments were performed in order to estimate the average efficiency. The total removal efficacy of bipolar air ionizer (BAI eff.) was estimated by using empirical equations of the particulate matter PM2.5 (BAI eff. pm2.5) and PM10 removal (BAI eff.pm10). Particulate matter was used as the marker of incense smoke in this study. The concentration of particulate matter, potential byproduct ozone, relative humidity, and the temperature was monitored by a customized sensor-based air quality monitor.Results: The tested bipolar air ionizer showed a significant decline in incense smoke. The average reduction in PM2.5 and PM10 concentration was observed by 74%–75%. The overall efficacy (BAI eff) against incense smoke particulate proportion was 90% ± 10% compared to the control. Byproduct ozone was not exceeded abnormally. However, the marginal elevation in temperature and humidity (up to 5°C or 21%) and humidity (1.8%) were observed when the bipolar air ionizer was conducted.Discussion: Incense smoke consists of multiple hazardous air pollutants including volatile organic compounds and carcinogens. Incense smoke may be the major source of household pollution. A portable bipolar air ionizer could be an auxiliary air cleaning option where incense burning practices are common.

show abstract