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Thermodynamic analysis of a tri-generation system driven by biomass direct chemical looping combustion process

机译：生物质直接化学循环燃烧过程驱动的三进系统热力学分析

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Chemical looping process (CLP) is a promising technology for in-situ CO2 capture without energy penalty. Direct CLP has more compact structure, favorable economic competitiveness, and larger reduction of exergy loss compared to syngas CLP. In this work, a novel biomass direct chemical looping combustion (CLC) driven tri-generation system for the production of cooling, heating, and power is proposed. The proposed system contains a direct CLC section as the prime mover, two gas turbines and an organic Rankine cycle for power generation, an absorption chiller for cooling production, and two heat exchangers to generate heat. First, a thorough thermodynamic analysis is implemented to assess the energy and exergy efficiencies of the proposed system under evaluated design conditions, as well as identify the exergy loss distribution. Second, Sensitivity analysis is conducted to investigate the effects of major operating parameters on the system performances. Third, the performances of the proposed system are compared to syngas CLC based tri-generation system. Thermodynamic analysis results show that the proposed system has high energy efficiency of 90.92% and exergy efficiency of 33.82%. The largest exergy loss takes place in the air reactor, accounting for 34.42% of total exergy loss, followed by fuel reactor and absorption chiller, which are 30.09% and 15.37%, respectively. Besides, the proposed system has better thermodynamic performances than syngas CLC driven tri-generation, whose energy and exergy efficiencies are 69% and 23.4%, respectively.
机译：化学循环过程（CLP）是一个有希望的技术，用于原位二氧化碳捕获，没有能量惩罚。直接CLP结构更紧凑，经济竞争力更具浓度，良好的经济竞争力，而且与合成气CLP相比，漏洞的更大减少。在这项工作中，提出了一种新的生物量直接化学循环燃烧（CLC）驱动用于生产冷却，加热和功率的动力的驱动三进系统。所提出的系统包含直接CLC部分作为主要动器，两个燃气轮机和用于发电的有机朗肯循环，吸收冷却器用于冷却生产，以及两个热交换器产生热量。首先，实施了彻底的热力学分析，以评估所提出的系统在评估的设计条件下的能量和漏洞效率，以及识别出漏洞分布。其次，进行敏感性分析，以研究主要操作参数对系统性能的影响。第三，将所提出的系统的性能与基于合成气CLC的三进生成系统进行比较。热力学分析结果表明，该系统的高能量效率为90.92％，高出效率为33.82％。在空气反应堆中最大的低级损失，占总出境损失的34.42％，其次是燃料反应器和吸收式冷却器，分别为30.09％和15.37％。此外，所提出的系统具有比合成气CLC驱动的三代更好的热力学性能，其能量和漏出效率分别为69％和23.4％。

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