Flow boiling heat transfer in a helically coiled steam generator for nuclear power applications

Two-phase pressure drop prediction in helically coiled steam generators for nuclear power applications

“…Even though the above indirect deduction of curvature effects on the pressure gradient in helical coils is no more than preliminary and evidently requires a direct experimental confirmation, this result is significant because it is in marked contrast with available data on convective boiling in helical coils. In particular, Santini et al [31] Fig. 1, the void fraction for the databank in Table 1 [52].…”

“…This new prediction method is very simple to implement, as it is based on the homogeneous flow model, is asymptotically consistent with straight tube two-phase flows and is largely superior in accuracy to existing prediction methods. The present study is part of a wide research program addressing single and two-phase boiling flows in helically coiled tubes, focusing in particular on the design and operation of compact once-through steam generators with in-tube boiling for nuclear power applications, notably small modular units [22,23,[27][28][29][30][31].…”

Thermal Energy Processes in Direct Steam Generation Solar Systems: Boiling, Condensation and Energy Storage – A Review

“…Of significant importance to direct steam generation systems is the literature related to the flow boiling correlations for water heat transfer and pressure drop from the last two decades. It is mainly composed of boiling in mini-and micro-scale (or other compact heat exchangers) (Saisorn and Wongwises, 2012;Cheng, 2016), critical heat flux (Ong and Thome, 2011;Fang et al, 2015;Konishi and Mudawar, 2015), microgravity (Kattan et al, 1998b;Zhang et al, 2016e) and nuclear phenomena (Santini et al, 2016;Gou et al, 2017). Since the work of Steiner and Taborek (1992), only recent heat transfer correlations that are deduced for water flow boiling in conventional diameter tubes and channels (hydraulic diameters larger than 3 mm Kandlikar and Grande (2003) are proposed by Shen et al (2016), Fang et al (2017), andShah (2017).…”

Design Analysis on Operating Parameter of Outlet Temperature and Void Fraction in Rde Steam Generator

“…In the analysis, the outlet steam temperature is affected by the heat transfer coefficient, feed water temperature, and mass flow rate [17]. Therefore, the principle in the steam generator thermal analysis is to specify fluid temperature, pressure and mass flow rate in order to determine steam production with the lowest possible content on droplets and at highest possible pressure and mass flow rate.…”