A New CHF Correaltion for Medium Pressure and High Mass Flux Conditions

W. Jaewoo Shim; Sung-Woo Lee; Ohyoung Kim

Journal of Industrial and Engineering Chemistry, Vol.9, No.3, 323-327, May, 2003

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A New CHF Correaltion for Medium Pressure and High Mass Flux Conditions

W. Jaewoo Shim^†, Sung-Woo Lee, and Ohyoung Kim¹

Department of Chemical Engineering, Dankook University, Seoul 140-714, Korea
¹Department of Polymer Science and Engineering, Dankook University, Seoul 140-714, Korea

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In this study, a new correlation is developed to predict the critical heat flux (CHF) for upward flow of water in uniformly heated round vertical tubes at the medium pressure and high mass flux conditions. The CHF condition of interest contained CHF data from five published sources and the ranges were as follows: 0.0011 ≤ D (diameter) ≤ 0.0375 m, 0.08 ≤ L (length) ≤ 4.97 m, 5.08 ≤ P (pressure) ≤ 73.43 bar, 2004.51 ≤ G (mass flux) ≤ 18580.35 kg/m(2)s, 0.08 ≤ q(c) (CHF) ≤ 21.42 MW/m(2), and -0.19 ≤ X (exit qualities) ≤ 0.90. The new correlation was developed based on the local hypothesis; it consisted only of local variables, that is, true mass quality(Xt), mass flux, tube diameter, and two parameters as a function of reduced pressure. The prediction made by the new correlation using 1097 data points showed a good agreement with average error of 1.6% and RMS error of 13.5%.

Keywords:CHF (critical heat flux);true mass quality;dryout;burnout;heat exchanger

[References]

Chang SH, Kwon YM, J. Korean Nucl Soc., 31(2), 236 (1999)
Celata GP, Cumo M, Katto Y, Mariani A, Int. J. Heat Mass Transf., 42(8), 1457 (1999)
Nariai H, Liu W, Inasaka F, Int. J. Heat Mass Transf., 43, 3371 (1999)
Liu ZH, Chen Y, JSME, 42(4), 4 (1999)
Tu KC, Lee CH, Wang SJ, Pei BS, Nucl. Technol., 124 (1998)
Park C, Hwang DH, Int. J. Heat Mass Transf., 25, 339 (1998)
Shim WJ, Joo SK, J. Ind. Eng. Chem., 8(3), 268 (2002)
Becker KM, Strand G, Osterdahl C, Royal Institute of Technology, Laboratory of Nuclear Engineering, KTH-NEL-14, Sweden (1971)
Thompson B, Macbeth RV, AEEW-R356, UK Atomic Energy Authority (1964)
Griffel J, NYO-187-7, Columbia University (1965)
Cheh HY, Fighetti CF, McAssey EV, CUHTRF-92-06 Columbia University (1992)
Bertoletti S, Gaspari GP, Lambardi C, Zavattarelli R, CISE Segrate, Milano (1963)
Bowring RW, AEEW-R789, UK, Atomic Energy Authority (1972)
Katto Y, Ohno H, Int. J. Heat Mass Transf., 27(9), 1641 (1984)
Dougherty JT, Yang BW, Proceeding of the ASME Heat Transfer Div. 3, ASME HTD, 334, 229 (1996)
Saha P, Zuber N, Proceeding of the 5th Int. Heat Transfer Conference, Tokyo, B4(7), 175 (1974)

[Referenced By]

[Related Articles]

[1] Chang SH, Kwon YM, J. Korean Nucl Soc., 31(2), 236 (1999)

[2] Celata GP, Cumo M, Katto Y, Mariani A, Int. J. Heat Mass Transf., 42(8), 1457 (1999)

[3] Nariai H, Liu W, Inasaka F, Int. J. Heat Mass Transf., 43, 3371 (1999)

[4] Liu ZH, Chen Y, JSME, 42(4), 4 (1999)

[5] Tu KC, Lee CH, Wang SJ, Pei BS, Nucl. Technol., 124 (1998)

[6] Park C, Hwang DH, Int. J. Heat Mass Transf., 25, 339 (1998)

[7] Shim WJ, Joo SK, J. Ind. Eng. Chem., 8(3), 268 (2002)

[8] Becker KM, Strand G, Osterdahl C, Royal Institute of Technology, Laboratory of Nuclear Engineering, KTH-NEL-14, Sweden (1971)

[9] Thompson B, Macbeth RV, AEEW-R356, UK Atomic Energy Authority (1964)

[10] Griffel J, NYO-187-7, Columbia University (1965)

[11] Cheh HY, Fighetti CF, McAssey EV, CUHTRF-92-06 Columbia University (1992)

[12] Bertoletti S, Gaspari GP, Lambardi C, Zavattarelli R, CISE Segrate, Milano (1963)

[13] Bowring RW, AEEW-R789, UK, Atomic Energy Authority (1972)

[14] Katto Y, Ohno H, Int. J. Heat Mass Transf., 27(9), 1641 (1984)

[15] Dougherty JT, Yang BW, Proceeding of the ASME Heat Transfer Div. 3, ASME HTD, 334, 229 (1996)

[16] Saha P, Zuber N, Proceeding of the 5th Int. Heat Transfer Conference, Tokyo, B4(7), 175 (1974)