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Träfflista för sökning "WFRF:(Fu Yifeng 1984) srt2:(2020);pers:(Wang Nan 1988)"

Search: WFRF:(Fu Yifeng 1984) > (2020) > Wang Nan 1988

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1.
  • Liu, Ya, 1991, et al. (author)
  • Graphene based thermal management system for battery cooling in electric vehicles
  • 2020
  • In: Proceedings - 2020 IEEE 8th Electronics System-Integration Technology Conference, ESTC 2020.
  • Conference paper (peer-reviewed)abstract
    • In this work, a graphene assembled film integrated heat sink and water cooling technology was used to build an experimental set-up of a thermal management system to demonstrate the possibility to achieve efficient cooling of the propulsion battery in electric vehicles. The experimental results showed that the temperature decrease of a Li-ion battery module can reach 11°C and 9 °C under discharge rates as of 2C and 1C, respectively. The calculated thermal resistance of the graphene based cooling system is about 76% of a similar copper based cooling system. Surface modification was carried out on the graphene sheet to achieve a reliable bonding between the graphene sheet and the battery cell surface. This work provides a proof of concept of a new highly efficient approach for electric vehicle battery thermal management using the light-weight material graphene.
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2.
  • Zehri, Abdelhafid, 1989, et al. (author)
  • High porosity and light weight graphene foam heat sink and phase change material container for thermal management
  • 2020
  • In: Nanotechnology. - : IOP Publishing. - 1361-6528 .- 0957-4484. ; 31:42
  • Journal article (peer-reviewed)abstract
    • During the last decade, graphene foam emerged as a promising high porosity 3-dimensional (3D) structure for various applications. More specifically, it has attracted significant interest as a solution for thermal management in electronics. In this study, we investigate the possibility to use such porous materials as a heat sink and a container for a phase change material (PCM). Graphene foam (GF) was produced using chemical vapor deposition (CVD) process and attached to a thermal test chip using sintered silver nanoparticles (Ag NPs). The thermal conductivity of the graphene foam reached 1.3 W m(-1)K(-1), while the addition of Ag as a graphene foam silver composite (GF/Ag) enhanced further its effective thermal conductivity by 54%. Comparatively to nickel foam, GF and GF/Ag showed lower junction temperatures thanks to higher effective thermal conductivity and a better contact. A finite element model was developed to simulate the fluid flow through the foam structure model and showed a positive and a non-negligible contributions of the secondary microchannel within the graphene foam. A ratio of 15 times was found between the convective heat flux within the primary and secondary microchannel. Our paper successfully demonstrates the possibility of using such 3D porous material as a PCM container and heat sink and highlight the advantage of using the carbon-based high porosity material to take advantage of its additional secondary porosity.
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