提出了一种基于太阳能利用的天然气冷热电联供系统，利用平板式真空管太阳能集热器制取87.5 ℃的太阳能热水，在与天然气内燃机发电产生的缸套水混合后协同烟气共同驱动多源吸收式制冷机组制冷，其末端烟气通入余热换热器制热。采用“以电定热”的方式集成配置系统，研究模拟了系统设计工况及变工况下的热力学性能及太阳能与天然气的互补特性。结果表明：将100 kW的内燃机与集热效率59%的太阳能集热器阵列匹配时，系统一次能源效率、火用效率可达71.17%、33.33%；天然气子系统较太阳能子系统对于总系统一次能源效率、火用效率有更大的贡献率。

In this paper, a combined cooling heating and power system driven by natural gasand based on solar energy is proposed. The evacuated tube collectors are utilized to produce solar hot water with a temperature of 87.5 ℃. The mixture of solar hot water and jacket water cooperates with the exhaust gas from internal combustion engine, and then is fed to a multi-source absorption chiller to produce chilled water. The surplus heat of exhaust gas is then sent into a heat exchanger to produce heating. The system is integrated and configured under the model of determining heat by power generation. The thermodynamic performances under the design conditions and variable conditions and the energy complementarity between the natural gas and solar energy are investigated and analyzed. The results indicate that when the solar collector arrays with a heat collecting efficiency of 59% is well configured with a 100 kW internal combustion engine, the systematic primary energy ratio and the exergy efficiency are 71.17% and 33.33%, respectively. The natural gas subsystem contributes more for the total system primary energy ratio and exergy efficiency than the solar subsystem.

TM61

国家自然基金项目(51406054)