Comparison of Methods for Increasing Heat Transfer in Steam Generators in a CANDU Reactor using various forms of Twisted Tapes
Abstract
The efficiency of a reactor can be improved through an increase of heat transfer in the steam generator component of the heat transport system. To increase the amount of heat transfer possible, the Nusselt (Nu) number should be increased. Following the Reynolds analogy as well as the turbulence of fluid will also play a factor in heat transfer. Multiple twisted tape inserts were compared as these begin to increase turbulence in the flow. The twisted tapes come in multiple configurations and as such, have different performance abilities based on flow turbulence, which is governed by the Reynolds number (Re), and the geometry of the tape. With the conditions tested below, the helical twisted tape returned a larger Nu number at higher Re numbers. At the lower end of the spectrum, the dual twisted tape insert and the clockwise/counter-clockwise tape returned the largest Nu value.References
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