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RISS 인기검색어
- 검색키워드
- 저자 : ( Mohammed Ali Alshaikh Mohammed ) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Development of Two-color Radiation Thermometer for Harsh Environments
( Mohammed Ali Alshaikh Mohammed ),( Kim Ki-seong ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.4
Many industrial processes require reliable temperature measurements in harsh environments with high temperature, dust, humidity, and pressure. However, commercially-available conventional temperature measurement devices are not suitable for use in such conditions. This study thus proposes a reliable, durable two-color radiation thermometer (RT) for harsh environments that was developed by selecting the appropriate components, designing a suitable mechanical structure, and compensating environmental factors such as absorption by particles and gases. The two-color RT has a simple, compactlydesigned probe with a well-structured data acquisition system combined with efficient LabVIEW-based code. As a result, the RT can measure the temperature in real time, ranging from 300 to 900℃ in extremely harsh environments, such as that above the burden zone of a blast furnace. The error in the temperature measurements taken with the proposed twocolor RT compared to that obtained using K-type thermocouple readouts was within 6.1 to 1.4℃ at a temperature range from 200 to 700℃. The effects of absorption by gases including CO<sub>2</sub>, CO and H2<sub>O</sub> and the scattering by fine particles were calculated to find the transmittance of the two wavelength bands of operation through the path between the measured burden surface and the two-color probe. This method is applied to determine the transmittance of the short and long wavelength bands to be 0.31 and 0.51, respectively. Accordingly, the signals that were measured were corrected, and the true burden surface temperature was calculated. The proposed two-color RT and the correction method can be applied to measure temperatures in harsh environments where light-absorbing gases and scattering particles exist and optical components can be contaminated.
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Two-color radiation thermometry-Measurement environment correction method
( Mohammed Ali Alshaikh ),( Kim Ki Seong ) 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
Two-color radiation thermometry is a non-contact method that can be applied to measure the temperature of the burden surface of the blast furnace for pig iron production in order to reduce operating costs and ensuring safety. In this method the burden surface is measured based on the ratio of the thermal intensity at two different spectral bands. e.g. short wavelength (SW) and long wavelength (LW). However, above burden zone is a harsh environment with high temperature, dust, hot gases and high pressure. In such conditions, the thermal radiation emitted by the burden surface can be scattered and absorbed by the constituents of the measurement environment, resulting in a different transmittance, τ, for the SW and LW bands and thus leading to a significant error in the measured temperature. This method was developed to determine the transmittance of the SW and LW band through the path between the burden surface and the twocolor probe.
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Development of an Infrared Two-color Probe for Particle Cloud Temperature Measurement
( Mohammed Ali Alshaikh Mohammed ),( Ki Seong Kim ) 한국액체미립화학회 2015 한국액체미립화학회지 Vol.20 No.4
The demands for reliable particle cloud temperature measurement exist in many process industries and scientific researches. Particle cloud temperature measurements depend on radiation thermometry at two or more color bands. In this study, we developed a sensitive, fast response and compact online infrared two-color probe to measure the temperature of a particle cloud in a phase of two field flow (solid-gas). The probe employs a detector contained two InGaAs photodiodes with different spectral responses in the same optical path, which allowed a compact probe design. The probe was designed to suit temperature measurements in harsh environments with the advantage of durability. The developed two-color probe is capable of detecting particle cloud temperature as low as 300°C, under dynamic conditions.
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Development of an Infrared Two-color Probe for Particle Cloud Temperature Measurement
Alshaikh Mohammed, Mohammed Ali,Kim, Ki Seong Institute for Liquid Atomization and Spray Systems 2015 한국액체미립화학회지 Vol.20 No.4
The demands for reliable particle cloud temperature measurement exist in many process industries and scientific researches. Particle cloud temperature measurements depend on radiation thermometry at two or more color bands. In this study, we developed a sensitive, fast response and compact online infrared two-color probe to measure the temperature of a particle cloud in a phase of two field flow (solid-gas). The probe employs a detector contained two InGaAs photodiodes with different spectral responses in the same optical path, which allowed a compact probe design. The probe was designed to suit temperature measurements in harsh environments with the advantage of durability. The developed two-color probe is capable of detecting particle cloud temperature as low as $300^{\circ}C$, under dynamic conditions.
ScienceON
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