Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube
Compared to using pure CO2 as a working fluid, mixing CO2 with dimethyl ether (DME) in specific ratios can enhance heat transfer efficiency and reduce system operating pressure. However, the issue of heat transfer deterioration (HTD) in supercritical CO2/DME mixtures has received limited attention....
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| Language: | English |
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Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25008275 |
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| author | Xiaojuan Niu Ziyang Yin Wenpeng Hong |
| author_facet | Xiaojuan Niu Ziyang Yin Wenpeng Hong |
| author_sort | Xiaojuan Niu |
| collection | DOAJ |
| description | Compared to using pure CO2 as a working fluid, mixing CO2 with dimethyl ether (DME) in specific ratios can enhance heat transfer efficiency and reduce system operating pressure. However, the issue of heat transfer deterioration (HTD) in supercritical CO2/DME mixtures has received limited attention. This study conducts a numerical analysis of the heat transfer characteristics of these mixtures in horizontal tubes. We conducted a systematic study for the first time on how various operating parameters influence the HTD mechanism and establish multiscale correlations between mixture thermophysical nonlinearities and thermal transport instabilities.The findings offer valuable insights for the safe operation of next-generation energy systems. Results show that DME addition delays HTD, while increasing system pressure and mass flux helps mitigate its severity. Moreover, gravitational acceleration introduces asymmetry in the local heat transfer coefficient (HTC) distribution. Under normal gravity conditions (gy = −9.8 m/s2), HTC suppression is observed compared to the zero-gravity condition (gy = 0 m/s2). |
| format | Article |
| id | doaj-art-c7cb6b5bf99a411b8b6cd83d74aadaf0 |
| institution | Matheson Library |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-c7cb6b5bf99a411b8b6cd83d74aadaf02025-07-01T04:09:17ZengElsevierCase Studies in Thermal Engineering2214-157X2025-09-0173106567Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tubeXiaojuan Niu0Ziyang Yin1Wenpeng Hong2Corresponding author.; School of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, ChinaSchool of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, ChinaSchool of Energy and Power Engineering, Northeast Electric Power University, Jilin, 132012, ChinaCompared to using pure CO2 as a working fluid, mixing CO2 with dimethyl ether (DME) in specific ratios can enhance heat transfer efficiency and reduce system operating pressure. However, the issue of heat transfer deterioration (HTD) in supercritical CO2/DME mixtures has received limited attention. This study conducts a numerical analysis of the heat transfer characteristics of these mixtures in horizontal tubes. We conducted a systematic study for the first time on how various operating parameters influence the HTD mechanism and establish multiscale correlations between mixture thermophysical nonlinearities and thermal transport instabilities.The findings offer valuable insights for the safe operation of next-generation energy systems. Results show that DME addition delays HTD, while increasing system pressure and mass flux helps mitigate its severity. Moreover, gravitational acceleration introduces asymmetry in the local heat transfer coefficient (HTC) distribution. Under normal gravity conditions (gy = −9.8 m/s2), HTC suppression is observed compared to the zero-gravity condition (gy = 0 m/s2).http://www.sciencedirect.com/science/article/pii/S2214157X25008275Heat transfer deteriorationSupercritical fluidCO2/DME mixtureParametric effectsNumerical simulation |
| spellingShingle | Xiaojuan Niu Ziyang Yin Wenpeng Hong Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube Case Studies in Thermal Engineering Heat transfer deterioration Supercritical fluid CO2/DME mixture Parametric effects Numerical simulation |
| title | Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube |
| title_full | Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube |
| title_fullStr | Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube |
| title_full_unstemmed | Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube |
| title_short | Numerical study of parametric effects on heat transfer deterioration of supercritical CO2/DME mixture flowing in a horizontal tube |
| title_sort | numerical study of parametric effects on heat transfer deterioration of supercritical co2 dme mixture flowing in a horizontal tube |
| topic | Heat transfer deterioration Supercritical fluid CO2/DME mixture Parametric effects Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25008275 |
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