Critical heat flux of subcooled flow boiling with water for high heat flux application

Fujio Inasaka; Hideki Nariai

doi:10.1117/12.163810

12 November 1993 Critical heat flux of subcooled flow boiling with water for high heat flux application

Fujio Inasaka, Hideki Nariai

Proceedings Volume 1997, High Heat Flux Engineering II; (1993) https://doi.org/10.1117/12.163810
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Subcooled flow boiling in water is thought to be advantageous in removing high heat load of more than 10 MW/m². Characteristics of the critical heat flux (CHF), which determines the upper limit of heat removal, are very important for the design of cooling systems. In this paper, studies on subcooled flow boiling CHF, which have been conducted by the authors, are reported. Experiments were conducted using direct current heating of stainless steel tube. For uniform heating conditions, CHF increment in small diameter tubes (1 - 3 mm inside diameter) and the CHF characteristics in tubes with internal twisted tapes were investigated, and also the existing CHF correlations for ordinary tubes (more than 3 mm inside diameter) were evaluated. For peripherally non-uniform heating conditions using the tube, whose wall thickness was partly reduced, the CHF for swirl flow was higher than the CHF under uniform heating conditions with an increase of the non-uniformity factor.

Citation Download Citation

Fujio Inasaka and Hideki Nariai "Critical heat flux of subcooled flow boiling with water for high heat flux application", Proc. SPIE 1997, High Heat Flux Engineering II, (12 November 1993); https://doi.org/10.1117/12.163810

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