설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)
- 제7권2호
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- Pages.184-195
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- 1995
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
완전혼합영역을 갖는 성층축열조의 충전과정에 대한 이론적인 해석
Theoretical Analysis of the Charging Process with Perfectly Mixed Region in Stratified Thermal Storage Tanks
초록
A theoretical one-dimensional model for the charging process in stratified thermal storage tanks is established presuming that the fluid ensuing from the tank inlet creates a perfectly mixed, layer above the thermocline. Both the generic and asymptotic closed-form solutions are obtained via the Laplace transformation. The asymptotic solution describes the nature of the charging pertaining to the case of no thermal diffusion, whereas the generic solution is of practical importance to understand the role of operating parameters on the stratification. The present model is validated through comparison with available experimental data, where they agree well with each other within a reasonable limit. An interpretation of the exact solution entails two important features associated with the charging process. The first is that an in-crease in the mixing depth
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