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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한설비공학회 International Journal of Air-Conditioning and Refrigeration Journal Of Air-Conditioning and Refrigeration Vol.4
발행연도
1996.9
수록면
135 - 148 (14page)

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A new set of capillary tube design charts is proposed. Roughness effects on the mass flow rate are taken into account. A steady state, one-dimensional, adiabatic model is numerically simulated. Numerical results are verified by experiments. Mass flow rates are measured at 142 different conditions. Calculated mass flow rates agree with measured values within 10%.
Based on this study a new set of simple equations for the mass flow rate of capillary tube is defined and a new set of capillary tube design charts is proposed. This set consists of three charts:the first is for the mass flow rate of the standard capillary tube(d_(standard)=1.6㎜, Lstandard=2.030㎜, ε_(standard)=2.5㎛), the second for the flow factor(Φ₁) and the third for the roughness factor(Φ₂). The new set of equations for the mass flow rate is proposed as follows:
m = Φ₁ Φ₂ m_(standard)
Φ₁ = m(L, d, ε_(standard)) / m_(standard)(Lstandard d_(standard) ε_(standard))
Φ₂ = m(Lstandard d_(standard) ε) / m_(standard)(Lstandard d_(standard) ε_(standard))
Calculated results from the charts are in agreements with those from experiments within 4.5%~9.6%. The sets of charts are in very good agreements with the computer model within 3%.

목차

Abstract

1. Introduction

2. Experimental Appratus

3. Numerical Model

4. Results and Discussion

5. Conclusion

Appendix

References

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