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Sökning: WFRF:(Cheng Wei) > Mälardalens universitet

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1.
  • Wei, P., et al. (författare)
  • Numerical study on thermal energy storage tube filled by metal foam with gradient porosities
  • 2019
  • Ingår i: IOP Conference Series. - : Institute of Physics Publishing.
  • Konferensbidrag (refereegranskat)abstract
    • Thermal energy storage has attracted more and more attentions due mainly to its ability of peak load shifting. Shell-and-tube configuration is a typical heat exchanger for thermal energy storage. To enhance phase change heat transfer, open-cell metal foam has been involved in various kinds of shell-and-tube heat exchangers. To further improve the overall thermal performance of a shell-and-tube heat exchanger, metal foams with gradient porosities were inserted into the shell side. Positive and negative gradients in porosity were studied for comparison. Numerical model was developed based on the finite volume method and three sets of numerical simulations were performed. Transient melting front and melting fraction were illustrated for comparison. Results demonstrated that the positive gradient in porosity outperformed the other two kinds of configurations, resulting in a 17.5% reduction in full melting time. 
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2.
  • Wei, Wendong, et al. (författare)
  • Embodied greenhouse gas emissions from building China's large-scale power transmission infrastructure
  • 2021
  • Ingår i: Nature Sustainability. - : NATURE RESEARCH. - 2398-9629. ; 4:8, s. 739-747
  • Tidskriftsartikel (refereegranskat)abstract
    • China has built the world's largest power transmission infrastructure by consuming massive volumes of greenhouse gas-(GHG-) intensive products such as steel. A quantitative analysis of the carbon implications of expanding the transmission infrastructure would shed light on the trade-offs among three connected dimensions of sustainable development, namely, climate change mitigation, energy access and infrastructure development. By collecting a high-resolution inventory, we developed an assessment framework of, and analysed, the GHG emissions caused by China's power transmission infrastructure construction during 1990-2017. We show that cumulative embodied GHG emissions have dramatically increased by more than 7.3 times those in 1990, reaching 0.89 GtCO(2)-equivalent in 2017. Over the same period, the gaps between the well-developed eastern and less-developed western regions in China have gradually narrowed. Voltage class, transmission-line length and terrain were important factors that influenced embodied GHG emissions. We discuss measures for the mitigation of GHG emissions from power transmission development that can inform global low-carbon infrastructure transitions.
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  • Resultat 1-2 av 2
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konferensbidrag (1)
tidskriftsartikel (1)
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refereegranskat (2)
Författare/redaktör
Wei, P. (1)
Yang, X. (1)
Wang, Meng (1)
Liu, W. (1)
Jin, L (1)
Cheng, H. (1)
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Chen, Bin (1)
Li, Hailong, 1976- (1)
Yang, Qing (1)
Zhang, Ning (1)
Guan, Dabo (1)
Meng, Jing (1)
Liang, Xi (1)
Xue, Jinjun (1)
Li, Jiashuo (1)
Zhang, Pengfei (1)
Feng, Kuishuang (1)
Congfu, M. (1)
Wei, Wendong (1)
Qian, Haoqi (1)
Cheng, Yaohua (1)
Kang, Chongqing (1)
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Mälardalens universitet  (2)Ta bort avgränsningen
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