Based on the experimental results of the heat transfer law of supercritical water flowing in Sub-channel with triangle distribution with grid spacer on supercritical water cooled reactor（SCWR），a physical model was built to investigate the entropy generation of supercritical water within a triangle sub-channel, which analyzed the effect of thermal parameters by using the computational fluid dynamics in the supercritical pressure range of P=23-25Mpa. The results show that the grid spacer can enhance the heat transfer capability of the core, reduce core internal entropy production and reduce irreversible losses. Thermal parameters have great influence on flow and heat transfer in core passage, In the pseudo-critical region, there are obvious differences in entropy production under different pressures. the peak of entropy generation decreases with the increase of pressure; With the increase of mass flow rate, the entropy generation in the channel decreases gradually, and improve the heat transfer ability；The heat flux density has a great influence on the entropy generation in the channel, and the heat flux density has an influence on the entropy generation in the whole enthalpy region. The change rate of entropy production with enthalpy in the high enthalpy region is higher than that in the low enthalpy region. With the increase of heat flux density, the entropy generation in the sub channel decreases.


Experimental on Entropy Generation of Supercritical Pressure Water Flowing in Reactors

Division / Sponsors: 
Power Division & Nuclear Engineering Division (NED)

Power Conference
Paper Proceedings: https://asmedigitalcollection.asme.org/POWER/POWER2020/volume/83747

International Conference on Nuclear Engineering
Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE2020/volume/83761

POWER-ICONE - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.