为了提高冷热电联供系统的灵活性和热力学性能，将线性菲涅尔集热器、吸收式热泵、有机朗肯循环、地源热泵相结合，提出了一种基于线性菲涅尔太阳能集热器的新型冷热电联供系统。在EES软件中建立了提议系统和参考系统的热力学模型，将提议冷热电联供系统和参考系统的性能进行比较，并分析了一些关键参数对系统性能的影响。结果表明：该系统在设计工况下，一次能源利用率可达到78.04%，太阳能发电效率为8.2%，热电比为10.13；与参考系统相比，节约了一次能源11.8%，提高了系统满足用户负荷的灵活性；夏季辐照强度每增加100 W/m2，一次能源利用率约增加0.95%，太阳能发电效率增加2.73%；在热分配比为0.2时，系统一次能源利用率最大为80.5%；热电比随着辐照强度和热分配比的增大而减小，当热分配比增大0.4时，夏季系统热电比下降了86.2%，冬季热电比下降了84.9%。

In order to improve the flexibility and thermodynamic performance of combined cooling, heating and power (CCHP) system, a new type of combined cooling, heating and power system based on linear Fresnel solar collector was proposed, combining linear Fresnel solar collector with absorption heat pump, organic Rankine cycle and ground source heat pump. The thermodynamic models of the proposed system and the reference system were established in the EES software, the performances of the proposed system and the reference system were compared, and the influence of some key parameters on the system performance was analyzed. The results show that the primary energy utilization rate of the system can reach 78.04%, the solar power generation efficiency is 8.2%, and the thermoelectric ratio is 10.13 under the design conditions. Compared with the reference system, the primary energy is saved by 11.8%, which improves the flexibility of the system to meet user loads. When the irradiation intensity increases by 100 W/m2 in summer, the primary energy utilization rate increases by about 0.95%, and the solar power generation efficiency increases by 2.73%. When the heat distribution ratio is 0.2, the primary energy utilization rate of the system is up to 80.5%. The thermoelectric ratio decreases with the increase of irradiation intensity and heat distribution ratio. When the heat distribution ratio increases by 0.4, the system thermoelectric ratio decreases by 86.2% in summer and 84.9% in winter.

TK221

国家自然科学基金（51876064）