01-01-2015, 04:09 PM
Natural circulation on several channels PS Adwani, Ph. D., 2007, 190 pages, Power Systems Engineering, IIT Bombay, Powai, Mumbai 400076. Director (s): Kannan N Iyer Abstract This work is connected with a single-phase natural circulation (NC) in single and multiple channels. The main tasks in this work include the start of the bulk fluid motion in NC loops from the rest, a few stationary solutions in cycles of multi-channel display borders and sustainability. Time delay at the beginning of the volume of traffic in the NC loop determine the shift in the mode of heat transfer and have value. Parameters affecting start times were determined in the course of defining equations for transitional situations. Using the theorem of Buckingham Pi, the number of dimensionless parameters, affecting the dimensionless time found that 11. the influence of some parameters have been defined for the selected range of independently, using numerical models. Ignoring the least effective and grouping settings equal impact prediction and correlation were to start time was calculated. This correlation could predict the experimental results of this work and other works of literature is pretty good. In multichannel NC loop, multiplicity of combinations of flow was predicted with the total pressure drop path of zero. Algebraic equations are designed assuming the exponential distribution of temperature in the refrigerator for consumption factors predicted several of the same proportions of heat input. Combination of predicted flow in multichannel NC cycle found that experimentally realizable. This was demonstrated through the cases of unidirectional and bidirectional streams for two NC NC three loops and loop. In these cases, predictions, obtained through the analysis of the relationship of the applied heat to specified ratios was observed to have a fair match with the experimentally observed values: code developed for analysis of transient processes in single-phase NC was found on the map almost identical boundaries of sustainability with different sizes of nodes. It has been shown that code developed was able to capture transitional with the lowest numerical diffusion.