Experimental study on heat storage and discharge characteristics of packed bed based on hydrated salt using cylindrical encapsulation units
Latent heat thermal energy storage technology based on hydrated salt phase-change materials(PSMs)characterized by high energy storage density and low cost,holds significant promise for widespread application in clean heating.In this study,we designed and constructed a packed-bed phase-change thermal storage system using sodium acetate trihydrate as the thermal storage material and cylindrical PSM encapsulation units as the fundamental building blocks.Through experimental investigations of the operational characteristics of the packed-bed thermal storage system,we explored the impact of the flow rate and thermal storage temperature on the charging/discharging duration,outlet temperature,thermal storage efficiency,and energy storage density of the system.The experimental results indicate that elevating the thermal storage temperature and increasing the flow rate can reduce the charging duration,enhance the thermal storage efficiency,and increase the energy storage density.The thermal efficiency of the storage system can reach 94.73%,and the energy storage density can achieve 71.77 kWh/m3.
inorganic hydrated saltphase change materialthermal storage devicepacked bed
万方数据
维普
