Thermodynamic Model of CO2 Deposition in Cold Climates
A thermodynamic model, borrowing ideas from psychrometric principles, of a cryogenic direct-air CO2-capture system utilizing a precooler is used to estimate the optimal CO2 removal fraction to minimize energy input per tonne of CO2. Energy costs to operate the system scale almost linearly with the t...
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ftembryriddleaun:oai:commons.erau.edu:publication-3272 2023-10-01T03:51:48+02:00 Thermodynamic Model of CO2 Deposition in Cold Climates Boetcher, Sandra K. S. Hippel, Ted von Traum, Matthew J. 1784444, 1777676 2019-12-02T08:00:00Z application/pdf https://commons.erau.edu/publication/2063 https://doi.org/10.1007/s10584-019-02587-3 https://commons.erau.edu/context/publication/article/3272/viewcontent/s10584_019_02587_3.pdf unknown Scholarly Commons https://commons.erau.edu/publication/2063 doi:10.1007/s10584-019-02587-3 https://commons.erau.edu/context/publication/article/3272/viewcontent/s10584_019_02587_3.pdf Publications CO2 desublimation thermodynamics cryogenics Arctic/Antarctica Environmental Engineering Environmental Sciences Environmental Studies Heat Transfer Combustion text 2019 ftembryriddleaun https://doi.org/10.1007/s10584-019-02587-3 2023-09-02T19:05:40Z A thermodynamic model, borrowing ideas from psychrometric principles, of a cryogenic direct-air CO2-capture system utilizing a precooler is used to estimate the optimal CO2 removal fraction to minimize energy input per tonne of CO2. Energy costs to operate the system scale almost linearly with the temperature drop between the ingested air and the cryogenic desublimation temperature of CO2, driving siting to the coldest accessible locations. System performance in three Arctic/Antarctic regions where the proposed system can potentially be located is analyzed. Colder ambient temperatures provide colder system input air temperature yielding lower CO2 removal energy requirements. A case is also presented using direct-sky radiative cooling to feed colder-than-ambient air into the system. Removing greater fractions of the ingested CO2 lowers the CO2 desublimation temperature, thereby demanding greater energy input for air cooling. It therefore is disadvantageous to remove all CO2 from the processed air, and the optimal mass fraction of CO2 desublimated under this scheme is found to be ~0.8-0.9. In addition, a variety of precooler effectiveness (ε ) values are evaluated. Increasing effectiveness reduces the required system power input. However, beyond ε = 0.7, at certain higher values of desublimated CO2 mass fraction, the CO2 begins to solidify inside the precooler before reaching the cryocooler. This phenomenon fouls the precooler, negating its effectiveness. Further system efficiencies can be realized via a precooler designed to capture solidified CO2 and eliminate fouling. Text Antarc* Antarctic Antarctica Arctic Embry-Riddle Aeronautical University: ERAU Scholarly Commons Arctic Antarctic Climatic Change 158 3-4 517 530 |
institution |
Open Polar |
collection |
Embry-Riddle Aeronautical University: ERAU Scholarly Commons |
op_collection_id |
ftembryriddleaun |
language |
unknown |
topic |
CO2 desublimation thermodynamics cryogenics Arctic/Antarctica Environmental Engineering Environmental Sciences Environmental Studies Heat Transfer Combustion |
spellingShingle |
CO2 desublimation thermodynamics cryogenics Arctic/Antarctica Environmental Engineering Environmental Sciences Environmental Studies Heat Transfer Combustion Boetcher, Sandra K. S. Hippel, Ted von Traum, Matthew J. Thermodynamic Model of CO2 Deposition in Cold Climates |
topic_facet |
CO2 desublimation thermodynamics cryogenics Arctic/Antarctica Environmental Engineering Environmental Sciences Environmental Studies Heat Transfer Combustion |
description |
A thermodynamic model, borrowing ideas from psychrometric principles, of a cryogenic direct-air CO2-capture system utilizing a precooler is used to estimate the optimal CO2 removal fraction to minimize energy input per tonne of CO2. Energy costs to operate the system scale almost linearly with the temperature drop between the ingested air and the cryogenic desublimation temperature of CO2, driving siting to the coldest accessible locations. System performance in three Arctic/Antarctic regions where the proposed system can potentially be located is analyzed. Colder ambient temperatures provide colder system input air temperature yielding lower CO2 removal energy requirements. A case is also presented using direct-sky radiative cooling to feed colder-than-ambient air into the system. Removing greater fractions of the ingested CO2 lowers the CO2 desublimation temperature, thereby demanding greater energy input for air cooling. It therefore is disadvantageous to remove all CO2 from the processed air, and the optimal mass fraction of CO2 desublimated under this scheme is found to be ~0.8-0.9. In addition, a variety of precooler effectiveness (ε ) values are evaluated. Increasing effectiveness reduces the required system power input. However, beyond ε = 0.7, at certain higher values of desublimated CO2 mass fraction, the CO2 begins to solidify inside the precooler before reaching the cryocooler. This phenomenon fouls the precooler, negating its effectiveness. Further system efficiencies can be realized via a precooler designed to capture solidified CO2 and eliminate fouling. |
author2 |
1784444, 1777676 |
format |
Text |
author |
Boetcher, Sandra K. S. Hippel, Ted von Traum, Matthew J. |
author_facet |
Boetcher, Sandra K. S. Hippel, Ted von Traum, Matthew J. |
author_sort |
Boetcher, Sandra K. S. |
title |
Thermodynamic Model of CO2 Deposition in Cold Climates |
title_short |
Thermodynamic Model of CO2 Deposition in Cold Climates |
title_full |
Thermodynamic Model of CO2 Deposition in Cold Climates |
title_fullStr |
Thermodynamic Model of CO2 Deposition in Cold Climates |
title_full_unstemmed |
Thermodynamic Model of CO2 Deposition in Cold Climates |
title_sort |
thermodynamic model of co2 deposition in cold climates |
publisher |
Scholarly Commons |
publishDate |
2019 |
url |
https://commons.erau.edu/publication/2063 https://doi.org/10.1007/s10584-019-02587-3 https://commons.erau.edu/context/publication/article/3272/viewcontent/s10584_019_02587_3.pdf |
geographic |
Arctic Antarctic |
geographic_facet |
Arctic Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
Publications |
op_relation |
https://commons.erau.edu/publication/2063 doi:10.1007/s10584-019-02587-3 https://commons.erau.edu/context/publication/article/3272/viewcontent/s10584_019_02587_3.pdf |
op_doi |
https://doi.org/10.1007/s10584-019-02587-3 |
container_title |
Climatic Change |
container_volume |
158 |
container_issue |
3-4 |
container_start_page |
517 |
op_container_end_page |
530 |
_version_ |
1778517075464028160 |