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과도응답해석을 이용한 열교환기의 성능평가방법에 관한 연구
박병규,홍택,박상희,Park, B.K.,Hong, T.,Park, S.H. 대한설비공학회 1999 설비공학 논문집 Vol.11 No.1
The performance evaluation technique of a heat exchanger is described by using a transient response analysis for the determination of an average heat transfer coefficient. The model using a finite difference method can accommodate arbitrary inlet fluid temperature as well as longitudinal conduction. Temperature histories are obtained from the experiments at the inlet and outlet of test core. Heat transfer coefficient and friction factor of the plate array are obtained in short times using the data reduction program of transient response analysis in the single-blow method. The results agree very well with theoretical results. It is shown that the rms deviations are very small and the performance evaluation technique gives rapid and accurate results.
변풍량(變風量)시스템의 에너지해석(解析)에 관(關)한 연구(硏究)
박병규,조동우,신현준,Park, B.K.,Cho, D.W.,Shin, H.J. 대한설비공학회 1988 설비저널 Vol.17 No.5
This paper presents an energy analysis on the VAV system of 10-story building in Seoul using DOE-2 program and Modified Bin Method. The use of VAV system is an excellent means of saving energy in new buildings and/or retrofit. The fan control techniques considered are cycling, discharge dampers, inlet vanes, and motor speed control. The monthly and annual energy consumption is calculated for fan control techniques, components, and chiller types. The results of annual fan electricity use are compared using DOE-2 and Modified Bin Method, and show fairly good agreement. In addition, factors affecting energy consumption are also described.