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

Abstract 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.

[1]  Hee Cheon No,et al.  Thermal hydraulic performance analysis of the printed circuit heat exchanger using a helium test facility and CFD simulations , 2009 .

[2]  Sangkwon Jeong,et al.  Development of highly effective cryogenic printed circuit heat exchanger (PCHE) with low axial conduction , 2012 .

[3]  T. Newell,et al.  An experimental study of flow and heat transfer in sinusoidal wavy passages , 1999 .

[4]  Young-Jin Baik,et al.  A mathematical correlation for predicting the thermal performance of cross, parallel, and counterflow PCHEs , 2017 .

[5]  V. Kottke,et al.  Sinusoidal wavy channels with Taylor-Goertler vortices , 1995 .

[6]  B. K. Hajek,et al.  Numerical study on thermal hydraulic performance of a Printed Circuit Heat Exchanger , 2013 .

[7]  Chang Oh,et al.  Simplified Optimum Sizing and Cost Analysis for Compact heat Exchanger in VHTR , 2008 .

[8]  Frank P. Incropera,et al.  Foundations of heat transfer , 2013 .

[9]  Hee Cheon No,et al.  Physical model development and optimal design of PCHE for intermediate heat exchangers in HTGRs , 2012 .

[10]  Qiuwang Wang,et al.  Optimization of fin arrangement and channel configuration in an airfoil fin PCHE for supercritical CO2 cycle , 2014 .

[11]  Kwang-Yong Kim,et al.  Optimization of zigzag flow channels of a printed circuit heat exchanger for nuclear power plant application , 2012 .

[12]  Ting Ma,et al.  Study on local thermal–hydraulic performance and optimization of zigzag-type printed circuit heat exchanger at high temperature , 2015 .

[13]  S. Jeon,et al.  Thermal performance of heterogeneous PCHE for supercritical CO2 energy cycle , 2016 .

[14]  Xin‐Rong Zhang,et al.  Experimental analysis on a novel solar collector system achieved by supercritical CO2 natural convection , 2014 .

[15]  Kwang-Yong Kim,et al.  A Parametric Study of the Thermal-Hydraulic Performance of a Zigzag Printed Circuit Heat Exchanger , 2014 .

[16]  Y. Kato,et al.  Heat transfer and pressure drop correlations of microchannel heat exchangers with S-shaped and zigzag fins for carbon dioxide cycles , 2007 .

[17]  Yoon-Ho Kim,et al.  Heat Transfer and Pressure Drop Characteristics in Straight Microchannel of Printed Circuit Heat Exchangers , 2015, Entropy.

[18]  Jae Eun Cha,et al.  Optimization of airfoil-type PCHE for the recuperator of small scale brayton cycle by cost-based objective function , 2016 .

[19]  Kune Y. Suh,et al.  Computational analysis of supercritical CO2 Brayton cycle power conversion system for fusion reactor , 2012 .

[20]  Sangkwon Jeong,et al.  Hydraulic performance of a microchannel PCHE , 2010 .

[21]  Kwang-Yong Kim,et al.  Comparative study on performance of a zigzag printed circuit heat exchanger with various channel shapes and configurations , 2013 .

[22]  Y. Kato,et al.  Printed circuit heat exchanger thermal–hydraulic performance in supercritical CO2 experimental loop , 2006 .

[23]  M. McLinden,et al.  NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 8.0 , 2007 .