Cyclone performance and optimization
The objectives of this project are: to characterize the gas flow pattern within cyclones, to revise the theory for cyclone performance on the basis of these findings, and to design and test cyclones whose dimensions have been optimized using revised performance theory. This work is important because its successful completion will aid in the technology for combustion of coal in pressurized, fluidized beds. This quarter, an empirical model for predicting pressure drop across a cyclone was developed through a statistical analysis of pressure drop data for 98 cyclone designs. The model is shown to perform better than the pressure drop models of First (1950), Alexander (1949), Barth (1956), Stairmand (1949), and Shepherd-Lapple (1940). This model is used with the efficiency model of Iozia and Leith (1990) to develop an optimization curve which predicts the minimum pressure drop and the dimension rations of the optimized cyclone for a given aerodynamic cut diameter, d{sub 50}. The effect of variation in cyclone height, cyclone diameter, and flow on the optimization curve is determined. The optimization results are used to develop a design procedure for optimized cyclones. 37 refs., 10 figs., 4 tabs.
- Research Organization:
- North Carolina Univ., Chapel Hill, NC (USA). Dept. of Environmental Sciences and Engineering
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-87PC79922
- OSTI ID:
- 6273743
- Report Number(s):
- DOE/PC/79922-T5; ON: DE91002492
- Country of Publication:
- United States
- Language:
- English
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Cyclone Performance and Optimization
Cyclone performance and optimization