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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 195 - 204 (10page)
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초록· 키워드
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The effects on pool boiling heat transfer of aqueous solutions of boric acid (H_3BO_3) and sodium chloride (NaCl) as working fluids have been studied. Borated and NaCl water were prepared by dissolving 0.5~5% volume concentration of boric acid and NaCl in distilled-deionized water. The pool boiling tests were conducted using 1 x 1 cm2 flat heaters at 1 atm. The critical heat flux (CHF) dramatically increased compared to boiling pure water. At the end of boiling tests it was observed that particles of boric acid and NaCl had deposited and formed a coating on the heater surface. The CHF enhancement and surface modification during boiling tests were very similar to those obtained from boiling with nanofluids. Additional experiments were carried out to investigate the reliability of the additives deposition in pure water. The boric acid and NaCl coatings disappeared after repeated boiling tests on the same surface due to the soluble nature of the coatings, thus CHF enhancement no longer existed. These results demonstrate that not only insoluble nanoparticles but also soluble salts can be deposited during boiling process and the deposited layer is solely responsible for significant CHF enhancement.
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참고문헌 (22)
참고문헌 신청
D. Milanova / 2005 / Role of ions in pool boiling heat transfer of pure and silica nanofluids / Applied Physics Letters 87 : 233107 ~
D. Wen / 2005 / Experimental investigation into the pool boiling heat transfer of aqueous based γ-alumina nanofluids / Journal of Nanoparticle Research 7 : 265 ~
E. Forrest / 2010 / Augmentation of nucleate boiling heat transfer and critical heat flux using nanoparticle thin-film coatings / International Journal of Heat and Fluid Flo
G. Moreno Jr / 2005 / Pool boiling heat transfer of alumina-water, zinc oxide-water and alumina-water+ethylene glycol nanofluid / Proceedings of HT2005, ASME Summer Heat Transfer C
H. Kim / 2009 / Experimental study of the characteristics and mechanism of pool boiling CHF enhancement using nanofluids / HEAT AND MASS TRANSFER 45 (7) : 991 ~ 998
D. Wen / 2005 / Experimental investigation into the pool boiling heat transfer of aqueous based γ-alumina nanofluids / Journal of Nanoparticle Research 7 : 265 ~
E. Forrest / 2010 / Augmentation of nucleate boiling heat transfer and critical heat flux using nanoparticle thin-film coatings / International Journal of Heat and Fluid Flo
G. Moreno Jr / 2005 / Pool boiling heat transfer of alumina-water, zinc oxide-water and alumina-water+ethylene glycol nanofluid / Proceedings of HT2005, ASME Summer Heat Transfer C
H. Kim / 2009 / Experimental study of the characteristics and mechanism of pool boiling CHF enhancement using nanofluids / HEAT AND MASS TRANSFER 45 (7) : 991 ~ 998
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