Mechanical Engineering Department, Sohag University, Sohag, Egypt.
Department of Mechanical Engineering, South Valley University, Qena, 83521, Egypt.
Environ Sci Pollut Res Int. 2023 Sep;30(43):98502-98525. doi: 10.1007/s11356-023-28875-1. Epub 2023 Aug 23.
Thermochemical sorption energy storage (TSES) is the most recent thermal energy storage technology and has been proposed as a promising solution to reduce the mismatch between the energy supply and demand by storing energy for months in form of chemical bonds and restore it in form of synthesis chemical reaction. Compared with sensible/latent thermal energy processes, TSES system has major advantages, including a high energy storage capacity/density and the possibility of long-term energy retention with negligible heat loss. Therefore, a solid-gas thermochemical sorption battery is established and investigated utilizing a composite working pair of MgSO-HO based on room temperature expanded graphite (RTEG), treated with sulfuric acid (HSO) and ammonium persulfate ((NH)SO) as a porous additive. The experimental results showed that energy storage density and sorption efficiency increase with the increment of charging temperature or decreasing of discharging temperature at a certain ambient temperature. Under experimental conditions, energy density ranged from 31.7 to 908.8 kJ/kg (corresponding to volume energy density from 11.7 to 335.8 MJ/m), while sorption energy efficiency ranged from 28.3 to 79.1%. The highest values were obtained when charging, condensation, and discharging temperatures were 95, 20, and 15 °C, respectively. The maximum thermal efficiency was 21.1% at charging/discharging temperature of 95/15 °C with sensible to sorption heat ratio of 3:1.
热化学吸附储能（TSES）是最近的热能存储技术，被提出作为一种有前途的解决方案，通过将能量以化学键的形式储存数月，并通过合成化学反应将其恢复，从而减少能源供应和需求之间的不匹配。与显热/潜热热能过程相比，TSES 系统具有主要优势，包括高储能能力/密度和在几乎没有热损失的情况下长期保持能量的可能性。因此，建立并研究了一种基于室温膨胀石墨（RTEG）的 MgSO-HO 复合工作对的固-气热化学吸附电池，该电池用硫酸（HSO）和过硫酸铵（(NH)SO）处理作为多孔添加剂。实验结果表明，在一定环境温度下，随着充电温度的升高或放电温度的降低，储能密度和吸附效率增加。在实验条件下，能量密度范围为 31.7 至 908.8 kJ/kg（相应的体积能量密度范围为 11.7 至 335.8 MJ/m），而吸附能量效率范围为 28.3 至 79.1%。当充电、冷凝和放电温度分别为 95、20 和 15°C 时，获得了最高值。在充电/放电温度为 95/15°C 时，显热与吸附热比为 3:1，最大热效率为 21.1%。
