Investigation of Pulverized Biomass and Coal Char Emissivity
Current work presents an optical setup, its calibration and reference process and the first results from single particle emissivity measurements of pulverized biomass and coal fuel particles. In contrast to earlier attempts, the setup offers the possibility of emissivity measurements during the whol...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/18/4620 |
| _version_ | 1797554495308169216 |
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| author | Lukas Pörtner Ying Gu Martin Schiemann |
| author_facet | Lukas Pörtner Ying Gu Martin Schiemann |
| author_sort | Lukas Pörtner |
| collection | DOAJ |
| description | Current work presents an optical setup, its calibration and reference process and the first results from single particle emissivity measurements of pulverized biomass and coal fuel particles. In contrast to earlier attempts, the setup offers the possibility of emissivity measurements during the whole particle burn-off. A laser ignites a single particle, placed in the center of the setup. Two photomultipliers observe the emitted particle radiation in the visible range (550 nm and 700 nm) for temperature calculation, using two-color pyrometry. An InSb-detector records the emitted particle radiation between 2.4 µm and 5.5 µm, which is later used to calculate particle emissivity in this range. The conclusion of multiple particle measurements lead to decreasing particle emissivity with increasing temperature. For coal particles the emissivity decreases from 0.45 at 2300 K to 0.03 at 3400 K. Biomass char shows a similar trend with a decrease from 0.18 (2100 K) to 0.03 (2900 K). |
| first_indexed | 2024-03-10T16:32:52Z |
| format | Article |
| id | doaj.art-848fdeb6c0aa42c9b849ff505d133b39 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T16:32:52Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-848fdeb6c0aa42c9b849ff505d133b392023-11-20T12:41:21ZengMDPI AGEnergies1996-10732020-09-011318462010.3390/en13184620Investigation of Pulverized Biomass and Coal Char EmissivityLukas Pörtner0Ying Gu1Martin Schiemann2Energy Plant Technology, Ruhr-University Bochum, 44801 Bochum, GermanyEnergy Plant Technology, Ruhr-University Bochum, 44801 Bochum, GermanyEnergy Plant Technology, Ruhr-University Bochum, 44801 Bochum, GermanyCurrent work presents an optical setup, its calibration and reference process and the first results from single particle emissivity measurements of pulverized biomass and coal fuel particles. In contrast to earlier attempts, the setup offers the possibility of emissivity measurements during the whole particle burn-off. A laser ignites a single particle, placed in the center of the setup. Two photomultipliers observe the emitted particle radiation in the visible range (550 nm and 700 nm) for temperature calculation, using two-color pyrometry. An InSb-detector records the emitted particle radiation between 2.4 µm and 5.5 µm, which is later used to calculate particle emissivity in this range. The conclusion of multiple particle measurements lead to decreasing particle emissivity with increasing temperature. For coal particles the emissivity decreases from 0.45 at 2300 K to 0.03 at 3400 K. Biomass char shows a similar trend with a decrease from 0.18 (2100 K) to 0.03 (2900 K).https://www.mdpi.com/1996-1073/13/18/4620biomasspulverized fueltwo-color pyrometryemissivity |
| spellingShingle | Lukas Pörtner Ying Gu Martin Schiemann Investigation of Pulverized Biomass and Coal Char Emissivity Energies biomass pulverized fuel two-color pyrometry emissivity |
| title | Investigation of Pulverized Biomass and Coal Char Emissivity |
| title_full | Investigation of Pulverized Biomass and Coal Char Emissivity |
| title_fullStr | Investigation of Pulverized Biomass and Coal Char Emissivity |
| title_full_unstemmed | Investigation of Pulverized Biomass and Coal Char Emissivity |
| title_short | Investigation of Pulverized Biomass and Coal Char Emissivity |
| title_sort | investigation of pulverized biomass and coal char emissivity |
| topic | biomass pulverized fuel two-color pyrometry emissivity |
| url | https://www.mdpi.com/1996-1073/13/18/4620 |
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