The initial purpose of adopting combined cooling heating and power (CCHP) system is to achieve cascade utilization of fuel energy as well as stepping into low-carbon society. In this study, CO₂ is used as gasification agent instead of conventional option of using steam in the biomass gasification unit for reducing CO₂ emissions and increasing energy efficiency. To determine the thermodynamic feasibility during the process, exergy analysis has been performed within the whole process as well as its individual units. From the analytical results, it discloses that gasification and combustor irreversibilities yield the highest exergy destruction in the CCHP system, which account for 44.19% and 20.79% of the overall exergy destruction, respectively. Exergy analysis emphasises that both losses and irreversibilities can contribute to loss of efficiency system performance. Additionally, focusing on the influences of key parameters on system performance has been highlighted as well. The outcomes suggest that the optimum gasification temperature and CO₂/C are 825 °C and 0.25 respectively. Under the optimal design parameters, the energy efficiency and PESR can reach 53.25% and 10.17% in summer respectively. In addition, a preliminary economic analysis is involved and the financial feasibility of this CCHP system is further demonstrated.

采用冷热电联产（CCHP）系统的最初目的是实现燃料能源的级联利用，并迈入低碳社会。在这项研究中，CO ₂用作气化剂，而不是在生物质气化装置中使用蒸汽减少CO ₂的常规选择排放和提高能源效率。为了确定过程中的热力学可行性，在整个过程及其各个单元中进行了火用分析。从分析结果可以看出，气化和燃烧室的不可逆性在CCHP系统中产生最高的火用破坏，分别占总火用破坏的44.19％和20.79％。火用分析强调损失和不可逆性都可能导致效率系统性能的损失。此外，重点突出了关键参数对系统性能的影响。结果表明最佳的气化温度和CO ₂/ C分别为825°C和0.25。在最佳设计参数下，夏季能效和PESR分别达到53.25％和10.17％。此外，还进行了初步的经济分析，并进一步证明了该CCHP系统的财务可行性。