Critical Heat Fluxes of Subcooled Water Flow Boiling against Inlet Subcooling in Short Vertical Tube
-
- HATA Koichi
- Institute of Advanced Energy, Kyoto Univ.
-
- KOMORI Hirokazu
- Dept. of Energy Science and Technology, Kyoto University
-
- SHIOTSU Masahiro
- Dept. of Energy Science and Technology, Kyoto University
-
- NODA Nobuaki
- National Institute for Fusion Science
この論文をさがす
抄録
The critical heat fluxes (CHFs) of subcooled water flow boiling for the test tube inner diameters (d=3 and 6mm) and the heated lengths (L=67, 120 and 150mm) are systematically measured for the flow velocities (u=4.0 to 13.3m/s), the inlet subcoolings (ΔTsub, in=48 to 148K), the outlet subcoolings (ΔTsub, out=10.5 to 95.1K), the inlet pressure (Pin=753 to 995kPa) and the outlet pressure (Pout=720 to 887kPa). The SUS304 tubes of L=67, 120 and 150mm for d=3mm and L=150mm for d=6mm are used. The values of L/d are 22, 40 and 50 for d=3mm, and 25 for d=6mm, respectively. The CHFs, qcr, sub, for a fixed ΔTsub, out become gradually lower with an increase in the L/d in the whole experimental range. The CHF correlation against outlet subcooling, which has been previously derived for L/d lower than 16, was modified to new one containing the L/d effect based on these experimental data. Furthermore, the relation between qcr, sub and L/d for a fixed ΔTsub, in was checked. The values of qcr, sub for a fixed ΔTsub, in became exponentially lower with the increase in L/d. CHF correlation against inlet subcooling has been given based on the experimental data for L/d ranging from 4.08 to 50. The correlations against outlet and inlet subcoolings can describe not only the CHFs obtained in this work for the inner diameter of 3 and 6mm at the outlet pressure of around 800kPa but also the authors' published CHFs data (1611 points) for the wide ranges of Pin=159kPa to 1MPa, d=3 to 12mm, L=33 to 150mm and u=4.0 to 13.3m/s within 15% difference for 30K≤ΔTsub, out≤140K and 40K≤ΔTsub, in≤151K.
収録刊行物
-
- JSME International Journal Series B Fluids and Thermal Engineering
-
JSME International Journal Series B Fluids and Thermal Engineering 47 (2), 306-315, 2004
一般社団法人 日本機械学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204674845824
-
- NII論文ID
- 110004826617
-
- NII書誌ID
- AA10888815
-
- ISSN
- 13475371
- 13408054
-
- NDL書誌ID
- 6939944
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可