Abstract
In current storage unit, spiral tubes were employed which is full of hot hybrid nanomaterial. The hybrid fluid become hot due to existence of sun and to use such heat the pipe was employed in storage unit which is full of RT82. To make it more effective, instead of straight pipe, spiral one was utilized. Two types of configurations were implemented with equal PCM volume. The difference of two cases is position where hybrid fluid exits the system. For validation, LF was evaluated and data were compared with experimental data. Outputs in term of temperature and solid fraction distribution as well as velocity distribution can help us to find which style is more applicable. Using spiral pipe is very common in industry because of lower sedimentation. In taype1, changing time from 10 to 30 min leads to change in solid fraction from 0.638 to 0.094.
•Spiral tubes were employed which is full of hot hybrid nanomaterial.•To make it more effective, instead of straight pipe, spiral one was utilized.•For validation, LF was evaluated and data were compared with experimental data.•Using spiral pipe is very common in industry because of lower sedimentation.