中文摘要：

提出了一种中温太阳能与化学链燃烧（CLC）整合的固体燃料蓄能新方法及冷热电联产（CCHP）新系统。以DME的Co基CLC为例,探究了变工况条件下蓄能对燃料化学能梯级利用与中温太阳热品位提升的作用,揭示了系统设计工况特性及全年热力性能,并比较了有蓄能和无蓄能时各自在四季典型日的性能规律。结果表明,有蓄能时年均太阳能净发电效率可达22.4%。本研究给出了一种中低温太阳能热化学固体燃料蓄能新方法。

英文摘要：

We put forward a new method of solar solid fuel by integrating mid-temperature solar heat and DME-fuelled chemical-looping combustion（CLC）,furthermore,combined this new method with a CCHP system.In this proposed method,the mid-temperature solar heat is used to drive the chemical-looping combustion of DME-CoO/Co,and then the solar heat is converted into the solar-solid fuel Co and stored.On the basis of our previous principle of the chemical energy cascade utilization,this method upgrades the energy level of the mid-temperature solar heat,and the exergy destruction in the combustion of DME is effectively utilized.As a result,the annual net solar-to-electricity efficiency is expected to reach 22.4%.With and without solar storage reaction of DME-CoO/Co,the behaviors of the thermodynamic performance are also given in typical days at the Four Seasons.Our study will provide a promising approach of solar-solid fuel storage,with high energy storage density and high net solar-to-electricity efficiency simultaneously.