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J Korean Soc Environ Eng > Volume 41(8); 2019 > Article
J Korean Soc Environ Eng 2019;41(8): 411-418. doi: https://doi.org/10.4491/KSEE.2019.41.8.411
석탄 화력 발전소 배출 미세먼지 측정을 위한 복사전달 방정식 해석
금오공과대학교 기계시스템공학과
Analysis of Radiative Transfer Equation for Measurement of Particulate Matter Emitted from Coal-Fired Power Plants
Euntaek Lee
Department of Mechanical System Engineering, Kumoh National Institute of Technology
Corresponding author  Euntaek Lee ,Tel: 054-478-7328, Fax: 054-478-7319, Email: euntaek@kumoh.ac.kr
Received: April 23, 2019;  Revised: July 22, 2019;  Accepted: July 31, 2019.  Published online: August 31, 2019.
This study represents the analysis of radiative transfer equation (RTE) for measurement of particulate matter emitted from coal-fired power plants. Generally, the light extinction method is used to measure the mass concentration of particulate matter.
In this paper, the two-flux approximation is used to solve the radiative transfer equation and obtain the nondimensional incident radiation within emission outlet. Also, the radiation characteristics of the particulate matter are predicted with Lorenz-Mie theory. The particulate matter has three size distributions with geometric mean particle diameters 10 nm, 100 nm and 1 µm.
Results and Discussion:
Absorption and scattering cross-sections and asymmetric factor are predicted as a function of wavelength and compared with respect to geometric mean particle diameters. Also, mass absorption and scattering cross-sections are predicted for conversion of particulate matter mass concentration. The nondimensional incident radiations at the emission outlet are calculated and compared with that of Beer-Lambert law for mass concentration 10 mg/m3 and 50 mg/m3.
Beer-Lambert law is valid for low scattering medium compared with absorption of medium. Nondimensional incident radiations at the emission are highly affected by the radiation characteristics of particulate matter.
Key Words: Particulate matter, Light scattering, Light extinction, Radiative transfer equation, Radiation characteristics
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