Prediction of flow boiling heat transfer coefficient in horizontal channels varying from conventional to small-diameter scales by genetic neural network

Jing Zhang; Yichao Ma; Mingjun Wang; Dalin Zhang; Suizheng Qiu; Wenxi Tian; Guanghui Su

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자료유형: 학술저널

저자정보: Jing Zhang Yichao Ma Mingjun Wang Dalin Zhang Suizheng Qiu Wenxi Tian Guanghui Su

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제8호

발행연도: 2019.1

수록면: 1,897 - 1,904 (8page)

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Three-layer back propagation network (BPN) and genetic neural network (GNN) were developed in this study to predict the flow boiling heat transfer coefficient (HTC) in conventional and small-diameter channels. The GNN has higher precision than BPN (with root mean square errors of 17.16% and 20.50%, respectively) and other correlations. The inputs include vapor quality x, mass flux G, heat flux q, diameter D and physical parameter φ, and the predicted flow boiling HTC is set as the outputs. Influences of input parameters on the flow boiling HTC are discussed based on the trained GNN: nucleate boiling promoted by a larger saturated pressure, a larger heat flux and a smaller diameter is dominant in small channels; convective boiling improved by a larger mass flux and a larger vapor quality is more significant in conventional channels. The HTC increases with pressure both in conventional and small channels. The HTC in conventional channels rises when mass flux increases but remains almost unaffected in small channels. A larger heat flux leads to the HTC growth in small channels and an increase of HTC was observed in conventional channels at a higher vapor quality. HTC increases inversely with diameter before dry out.

참고문헌 (58)

참고문헌 신청

G. H. Su / 2002 / Application of an artificial neural network in reactor thermohydraulic problem : prediction of critical heat flux / J. Nucl. Sci. Technol 39(5):564~571

J. C. Chen / 1966 / Correlation for boiling heat transfer to saturated fluids in convective flow / Ind. Eng. Chem. Process Des. Dev 5(3):322~329

M. M. Shah / 1982 / Chart correlation for saturated boiling heat-transfer : equations and further study / ASHRAE Trans 88(1):85~96

K. Gungor / 1986 / A general correlation for flow boiling in tubes and annuli / Int. J. Heat Mass Transf 29(3):351~358

S. G. Kandlikar / 1990 / A general correlation for saturated two-phase flow boiling heat transfer inside horizontal and vertical tubes / J. Heat Transf 112(1):219~228

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이 논문의 저자 정보

Jing Zhang

소속기관 Institute of Mechanics and Computational Engineering, Department of Aeronautics and Astronautics