Solar-driven trigeneration system producing cooling, heating and power (CCHP) is an effective way to increase the utilization rate of solar energy. Here, a novel adjustable CCHP system is proposed by employing parabolic trough collectors (PTC), Organic Rankine Cycle (ORC), absorption chiller (AC) and electrical chiller/heater (EC/H) to meet building cooling and heating demand. A full thermal simulation model of the system is constructed and validated. The thermal and adjustable performance of a hybrid system with variable solar irradiance and solar thermal allocation ratio is explored by carrying out energy, exergy and heat to electricity ratio. Considering the energy levels of products and investment recovery coefficient of units at the end of service life, a modified exergo-economic method is utilized to optimize the thermal allocation ratio among the system components based on a specific working condition converted from yearly building parameters. The thermal analysis shows that except for the energy efficiency with increasing allocation ratio, the irradiance and allocation ratio have positive impacts on energy, and exergy performance, and the proposed system has a higher adjustable performance with a higher heat to electricity ratio than other studies. The exergo-economic optimization shows that 86% of the solar heat is fed to the ORC-unit at optimum point with an unit exergy cost of 0.826 $/kWh. Compared to conventional exergo-economic method, the specific costs of the products are lower owing to the function of cost recovery coefficient. This research illustrates a new way to effectively utilize solar thermal energy for district energy systems.

利用太阳能发电，制冷和供热的三联发电系统是提高太阳能利用率的有效途径。在此，通过采用抛物槽收集器（PTC），有机朗肯循环（ORC），吸收式制冷机（AC）和电制冷机/加热器（EC / H）提出了一种新颖的可调节CCHP系统，以满足建筑物的制冷和供暖需求。构建并验证了系统的完整热仿真模型。通过执行能量，火用和热电比，研究了具有可变太阳辐照度和太阳热分配比的混合系统的热性能和可调节性能。考虑到使用寿命结束时产品的能量水平和单位的投资回收系数，根据从年度建筑参数转换而来的特定工作条件，采用了一种改进的能效经济方法来优化系统组件之间的热分配比。热分析表明，除了能量效率随着分配比的增加外，辐照度和分配比对能量和火用性能都有积极的影响，与其他研究相比，该系统具有更高的可调性能和更高的热电比。从经济角度进行的经济优化表明，在最佳点处将86％的太阳能供入ORC装置，单位火用成本为0.826 $ / kWh。与传统的经济方法相比，由于成本回收系数的作用，产品的单位成本较低。