کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4453196 1312141 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution
چکیده انگلیسی

We designed and evaluated a unipolar diffusion charger. This charger consisted of a corona discharge, mixing, and ion trap zones. For the performance evaluation of the diffusion charger, sodium chloride (NaCl) particles smaller than 0.1μm in diameter, and dioctyl sebacate (DOS) particles of 0.1–0.7μm, were used. The diffusion charger was evaluated with two parameters. One parameter was particle loss and the other parameter was charging characteristics which were the product of penetration and average number of charges (P·nP·n). The parameters were measured by varying values of the voltage applied to the diffusion charger. The total particle losses were below 15%. The number of charges was almost linear with respect to the particle diameter. In order to reduce the time required to obtain the desired particle size distribution in the laboratory experiments, we estimated the geometric mean diameter and the log-normal size distribution of the generated submicron particles by using a diffusion charger as well as a condensation particle counter (CPC, TSI model 3025A) and an aerosol electrometer (TSI model 3068A). The estimated size distribution can be used for real-time measurements after calibration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Aerosol Science - Volume 38, Issue 4, April 2007, Pages 420–430
نویسندگان
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