基于太阳能热化学的分布式供能系统热力学性能及碳排放分析

分布式供能系统临近用户，具有灵活消纳可再生能源的优势。集成太阳能与清洁燃料互补的分布式供能系统，旨在实现太阳能与燃料的高效互补利用。提出了基于太阳能热化学的分布式供能系统，该系统集成了太阳能热化学转化与分布式冷热电联供系统，将太阳能与甲醇以热化学的形式进行源头互补，把太阳能转化为合成气燃料化学能，进而通过内燃机发电机组和余热回收单元输出冷、热、电产品，以满足用户的负荷需求。通过数值计算的方法，对所集成的系统开展了热力学性能及CO₂排放性能分析，研究了设计工况及变工况下运行性能，结果表明所集成的太阳能与燃料热化学互补供能系统具有显著的节能减排优势。

Thermodynamic Performance and Carbon Emission Analysis of Distributed Energy Supply System Based on Solar Thermochemistry

Distributed energy supply system is installed close to end-users with advantages of flexible consumption of renewable energy. Distributed energy supply system with integrating solar energy and clean fuel was conducted to achieve efficient utilization of solar energy and fuel. A distributed energy supply system based on the solar thermochemistry was proposed. The system integrated solar thermochemistry conversion and distributed energy system combined cooling, heating and power. The solar and methanol were complemented at the source in a thermochemical form, and the solar was converted into chemical energy of syngas, the cold, heat and power products were then exported through the internal combustion engine electric generator and waste heat recovery units to meet the load demand of users. Through numerical calculation method, the thermodynamic performance and CO₂ emission performance of the integrated system were analyzed, and the performance under design and variable operating conditions was studied. The results show that the integrated solar energy and fuel thermochemical complementary energy supply system has significant advantages of energy saving and emission reduction.