CaO/Ca(OH)_(2)体系热化学储能应用关键问题的讨论

A discussion of key issues for the application of CaO/Ca(OH)_(2)system thermochemical energy storage

热化学储能由于系统的复杂性还未实现实际的应用。CaO/Ca(OH)_(2)体系是一种较为理想的热化学储能反应体系,通过对CaO/Ca(OH)_(2)体系实际应用中关键反应参数、反应床形式、物料循环方式和水的质热利用等一些关键问题的讨论。研究结果表明CaO/Ca(OH)_(2)体系应向更高温度(600~650℃)的压力型反应器发展,反应器内的气体应脱除CO_(2),需要根据实际需求开展更有针对性的物料循环方式设计,以及水的循环是目前应用系统最需解决的困难等结论。对这些关键问题讨论得出的结论,明晰了热化学储能系统应用研究的方向与困难所在,对其他类似的许多固—汽热化学反应体系也具有重要的意义。

Thermochemical energy storage(TCES)has not reached the commercial applications yet due to the high complexity of the system.CaO/Ca(OH)_(2)looping system is a hopeful candidate for the applications of TCES.A discussion of key issues of CaO/Ca(OH)_(2)application system is proceeded including key reaction parameters,bed type,looping mode and water vapor recycling.The conclusions show that the higher reaction temperature(600~650℃)and pressurized reactor are necessary for the future development of the high temperature CaO/Ca(OH)_(2)TCES.CO_(2)should be removed from the reactor,and the mode how mass is recycled should be designed specifically according to practical requirements.The mass and heat recycling of the water vapor may be the most difficulty for the application of CaO/Ca(OH)_(2)TCES at present.The conclusions obtained from the discussion point out the directions and the difficulties for the further research works,and these are also significant for many other solid-gas TCESs.