Thermodynamic analysis of a combined cooling, heating, and power system integrated with full-spectrum hybrid solar energy device
| Autor: | Zhiheng Cui, Zepeng Han, Yi Liu, Xutao Zhang, Jiangjiang Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Exergy
Materials science Primary energy Renewable Energy Sustainability and the Environment business.industry 020209 energy Nuclear engineering Energy Engineering and Power Technology 02 engineering and technology Solar energy Chemical energy Electric power system Fuel Technology Power rating 020401 chemical engineering Nuclear Energy and Engineering Waste heat Thermal 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering business |
| Zdroj: | Energy Conversion and Management. 228:113596 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2020.113596 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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