Abstract This paper proposes a combined cooling, heating, and power system integrated with full-spectrum hybrid solar energy device containing molecular solar thermal system and solar water heating system to improve solar energy utilization efficiency. This system comprehensively integrates solar energy, fuel chemical energy and waste heat energy based on methanol decomposition to optimize energy utilization method. The thermodynamic models of components are established and the system evaluation indicators are presented. Based on a rated power of 834 kW, the thermodynamic performances under the design conditions were simulated and analyzed using Engineering Equation Solver, and the Sankey diagrams of energy and exergy flows were obtained in the respective cooling and heating modes. The results indicated that the solar energy share reaches 45.07%, and the energy and exergy efficiencies in cooling mode are 70.65% and 26.59%, respectively. They are increased by 1.52% and 1.92% in heating mode, respectively. The influences of various solar irradiation and power load ratio on system performances are discussed. The results indicate that the power load ratio and direct normal irradiance have positive impacts on energy and exergy efficiencies whereas they have negative impacts on solar energy share. Compared to the conventional methanol direct-fired system, the primary energy saving ratio and carbon dioxide emission reduction ratio of the proposed system reaches 16.20% and 16.14%, respectively.

中文翻译：

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集成全光谱混合太阳能装置的冷、热、电联合系统的热力学分析

摘要 本文提出了一种包含分子太阳能热系统和太阳能热水系统的全光谱混合太阳能装置集成的冷热电联合系统，以提高太阳能利用效率。该系统以甲醇分解为基础，综合整合太阳能、燃料化学能和余热能，优化能源利用方式。建立了部件的热力学模型，给出了系统评价指标。以834 kW的额定功率为基础，利用工程方程求解器对设计工况下的热力学性能进行了模拟分析，得到了各自冷却和加热模式下的能量流和火用流的桑基图。结果表明，太阳能占比达到45.07%，制冷模式下的能量和火用效率分别为70.65%和26.59%。它们在加热模式下分别增加了 1.52% 和 1.92%。讨论了各种太阳辐照度和功率负载比对系统性能的影响。结果表明，功率负载比和直接法向辐照度对能量和火用效率有积极影响，而对太阳能份额有负面影响。与传统的甲醇直燃系统相比，该系统的一次节能率和二氧化碳减排率分别达到16.20%和16.14%。讨论了各种太阳辐照度和功率负载比对系统性能的影响。结果表明，功率负载比和直接法向辐照度对能量和火用效率有积极影响，而对太阳能份额有负面影响。与传统的甲醇直燃系统相比，该系统的一次节能率和二氧化碳减排率分别达到16.20%和16.14%。讨论了各种太阳辐照度和功率负载比对系统性能的影响。结果表明，功率负载比和直接法向辐照度对能量和火用效率有积极影响，而对太阳能份额有负面影响。与传统的甲醇直燃系统相比，该系统的一次节能率和二氧化碳减排率分别达到16.20%和16.14%。