CFD Study on Flow and Heat Transfer Characteristics of Counter-flow Straight Channel Printed Circuit Plate Heat Exchanger

Mao Junjun; Yang Xiaoyong; Zhao Gang; Peng Wei

doi:10.13832/j.jnpe.2022.S2.0150

Volume 43 Issue S2

Dec. 2022

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Mao Junjun, Yang Xiaoyong, Zhao Gang, Peng Wei. CFD Study on Flow and Heat Transfer Characteristics of Counter-flow Straight Channel Printed Circuit Plate Heat Exchanger[J]. Nuclear Power Engineering, 2022, 43(S2): 150-157. doi: 10.13832/j.jnpe.2022.S2.0150

Citation:

Mao Junjun, Yang Xiaoyong, Zhao Gang, Peng Wei. CFD Study on Flow and Heat Transfer Characteristics of Counter-flow Straight Channel Printed Circuit Plate Heat Exchanger[J]. Nuclear Power Engineering, 2022, 43(S2): 150-157. doi: 10.13832/j.jnpe.2022.S2.0150

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CFD Study on Flow and Heat Transfer Characteristics of Counter-flow Straight Channel Printed Circuit Plate Heat Exchanger

doi: 10.13832/j.jnpe.2022.S2.0150

Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, China

Received Date: 2022-08-20
Rev Recd Date: 2022-09-01
Publish Date: 2022-12-31

Abstract

Abstract

Printed circuit heat exchangers (PCHEs) have a good application prospect in the Helium closed Brayton cycle of high temperature gas cooled reactor because of its high compactness, high temperature and high pressure resistance and high heat transfer efficiency. In this paper, the flow and heat transfer performance of counter-flow straight channel PCHE helium regenerator is studied by using computational fluid dynamics (CFD) numerical simulation. The effect of geometric parameters on helium flow and heat transfer in straight channel PCHE is analyzed by changing the channel horizontal spacing, vertical spacing and flow channel radius. The calculation results show that the vertical spacing only has an effect on the heat transfer performance, while the horizontal spacing has no obvious effect, and the flow channel radius has an effect on the flow and heat transfer performance of PCHE. The heat transfer performance of PCHE is improved by reducing the channel vertical spacing; When the inlet mass flow rate is kept constant, if the channel radius is reduced, the convective heat transfer coefficient and heat transfer performance are enhanced, but the pressure drop along the channel increases. In addition, the vertical or horizontal multi-channel PCHE model is used to compare the temperature and pressure drop distribution along different channels to determine the effect of vertical and horizontal positions on the thermal and hydraulic performance of PCHE. By comparing the calculation results of the multi-channel model with that of a single heat exchange unit, it is shown that a single heat exchange unit with periodic boundary conditions can more accurately simulate most of the flow channels of the complete PCHE model.
- Printed circuit heat exchanger,
- Numerical simulation,
- Geometric parameters

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References(13)

References

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