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초록
In this study, an extended uncertainty evaluation methodology was developed by introducing explicit correction terms for these loss mechanisms and by incorporating a ΔT-dependent sensitivity model to address nonlinear error propagation under small temperature differences. The proposed procedure was validated using experimental data obtained from a counter-flow tubular heat exchanger operating with a liquid-metal and air pair. The expanded uncertainty of the net heat transfer rate was −5.69 % to +3.90 % on the hot side and ±10.58 % on the cold side, demonstrating good agreement with physically observed heat-loss behavior. The results confirm that the present methodology provides a physically consistent framework for quantifying experimental uncertainties in low-Prandtl-number thermal systems, and can serve as a standardized approach for future high-temperature liquid-metal heat transfer experiments.
키워드
- 제목
- 낮은 프란틀 수 유체 열전달 성능 정량화를 위한 불확실도 평가 방법론 개발
- 제목 (타언어)
- Development of an Uncertainty Evaluation Methodology for Heat Transfer Performance Tests with Low-Prandtl-Number Fluids
- 저자
- 김성현; 이제환; 김형모
- 발행일
- 2025-11
- 유형
- Y
- 저널명
- 한국가시화정보학회지
- 권
- 23
- 호
- 4
- 페이지
- 22 ~ 29