In order to investigate and optimize the steam heat output characteristics of the packed bed adsorption thermal storage

this paper conducts experimental research using a phase-change coupled packed bed adsorption thermal storage

where air is employed as the heat storage medium and low-grade water as the heat release medium. The experiment compares the system heat storage/release performance under different internal filling bed structures and the formation and evolution of the thermocline inside the filling bed are discussed. By changing the different heat storage/release operating conditions

the optimal heat storage/release temperature for low-grade water vaporization are obtained. The experimental results show that the phase change coupled packed bed adsorption is conducive to forming a stable thermocline during the heat release process

the instantaneous heat release power at a steam output temperature of 188℃ is approximately 22 kW. The increase in heat storage temperature has a significant impact on the system performance

and under fixed heat release temperature

the system efficiency increases with theheat storage temperature. When the heat storage temperature is 200℃

the heat storage/release efficiency of the packed bed can reach 99%. This research has guiding significance for the development of stable and high-quality utilization technologies for industrial low-grade waste heat.