The Comparison of the Total Emissivity Model for CO<sub>2</sub>in Atmosphere

Byun, Ki-Hong

doi:10.7836/kses.2011.31.5.085

Cited by 2 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gray gas model in Eq. (5) [12] derived from the model used by Atwater and Ball [4,6] matches well with the results given by Hottel [2]. In general, the upper bound of total emissivity is given by Hottel, and the lower bound is by HITRAN [8].…”

Section: Total Emissivitysupporting

confidence: 77%

“…For the range of values tested, the results show the following trends: Among spectral emissivity models, results by the Yamamoto and Sasamori [6,7] matches well with HITRAN [8] block calculation results. Among total emissivity models, the results by Hottel [2] and gray gas model [12] match well. The total emissivity differences among models are rather large and sometimes more than about 0.05.…”

Section: Discussionmentioning

confidence: 63%

“…For the temperature range between 220K and 300K, the blackbody energy fraction within the band varies from 0.1902 to 0.1837. But the blackbody energy fraction is chosen as the same as that of Bliss [3] for comparison purposes in Ref [12]. The Eq.…”

Section: Model Used By Atwater and Ballmentioning

confidence: 99%

“…For this paper only 15µm CO 2 absorption band being considered whereas all the CO2 bands such as 15, 10.4, 9.4, 4.3, 2.7, and 2.0µm bands are used in Ref. [12]. The relative error of 15µm band only case relative to whole band case is at most 5.6% for the range of values tested in this paper.…”

Section: Wide Band Model By Edwardsmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of Total Emissivity of Co2 in Troposphere by Several Methods

Byun

Chen

2012

The International Conference on Applied Mechanics and Mechanica

View full text Add to dashboard Cite

The effects of CO 2 ppm in troposphere on both spectral and total emissivity are reviewed using several methods. The compared models are by Hottel [2], Bliss [3], Atwater and Ball [4,6], wide Band Model by Edwards [5], Yamamoto and Sasamori [6,7], and using HITRAN data base [8]. For spectral emissivity, the results by Yamamoto and Sasamori match well with predictions using HITRAN data base. For total emissivity, the deviations between models are rather large and sometimes more than about 0.05. In general, for a given condition, the upper bound of total emissivity is given by Hottel, and lower bound is given by HITRAN. The predictions by Edwards are in between but near to those of Hottel. The CO 2 ppm varied from 300 ppm to 600 ppm, temperature varied from 220K to 300K, and pressure from 0.3 to 1.0atm. As CO 2 ppm increases, the total emissivity increases. For a given CO 2 ppm, the total emissivity increases as the air thickness increases which are also true for both temperature and pressure increase. Around 260K, the total emissivity is less sensitive to increasing temperature than to decreasing temperature. For a given pressure change, the total emissivity values by wide band model changes more than the values by HITRAN. The reverse is true for temperature change.

show abstract

Section: Total Emissivitysupporting

confidence: 77%

Section: Discussionmentioning

confidence: 63%