Heat transfer performance of wavy-channeled PCHEs and the effects of waviness factors

•The thermal performance of wavy-channeled PCHEs is investigated numerically.•The effects of waviness factors are investigated.•A nondimensional parameter for characterizing the thermal performance of wavy-channeled PCHEs, is proposed. The printed circuit heat exchanger (PCHE) is a key component in...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2017-11, Vol.114, p.809-815
Main Authors: Baik, Young-Jin, Jeon, Sangwoo, Kim, Byeongil, Jeon, Daechan, Byon, Chan
Format: Article
Language:English
Subjects:
Carbon dioxide
Flow velocity
Heat exchangers
Heat transfer
Mass flow rate
PCHE
Performance enhancement
Performance evaluation
Straight channels
Studies
Supercritical CO2 cycle
Thermal energy
Waviness
Wavy
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Summary:•The thermal performance of wavy-channeled PCHEs is investigated numerically.•The effects of waviness factors are investigated.•A nondimensional parameter for characterizing the thermal performance of wavy-channeled PCHEs, is proposed. The printed circuit heat exchanger (PCHE) is a key component in the future compact energy cycles due to its high heat transfer performance and structural rigidity. In this study, the thermal performance of wavy-channeled PCHEs, and the effects of the waviness factors: the amplitude and the period, on the thermal performance of the PCHE are investigated numerically. The thermal performance of the wavy-channeled PCHEs is compared with that of conventional PCHEs with straight channels. Based on the numerical results, it has been shown that the wavy-channeled PCHEs can have significantly higher thermal performance than the conventional straight-channeled PCHEs due to the increased area for heat transfer. The effect of recirculating flow induced by the waviness is estimated to be negligible for the typical range of CO2 mass flow rate of compact power generations. It has been shown that the performance enhancement can be predicted using a sole nondimensional parameter: the ratio between amplitude and period, and has linear relationship with this nondimensional parameter.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2017.06.119