Investigation of discharge characteristics of a tri-generative system based on advanced adiabatic compressed air energy storage
| Autor: | Zhonghe Han, Senchuang Guo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Exergy
Thermal efficiency Compressed air energy storage Materials science Renewable Energy Sustainability and the Environment 020209 energy Nuclear engineering Energy Engineering and Power Technology 02 engineering and technology Cooling capacity Fuel Technology NTU method 020401 chemical engineering Nuclear Energy and Engineering 0202 electrical engineering electronic engineering information engineering Exergy efficiency 0204 chemical engineering Adiabatic process Mechanical energy |
| Zdroj: | Energy Conversion and Management. 176:110-122 |
| ISSN: | 0196-8904 |
| Popis: | The tri-generative system based on advanced adiabatic compressed air energy storage can simultaneously provide cooling energy, heating energy and mechanical energy. In order to study the discharge characteristics, three operation modes of expanders, which contain constant pressure, constant-sliding and sliding pressure, are proposed in this paper. By utilizing the numerical simulation method, the performance difference of three modes is compared with each other. The results show that four performance indexes of constant-sliding mode are all the biggest, which are respectively cycle efficiency 40.55%, thermal efficiency 80.06%, exergy efficiency 48.45% and exergy density 4.071 × 106 J·m−3, and cooling capacity of it is also the strongest, 8.386 × 109 J, among the three operation modes. Air storage chamber has the largest exergy destruction. Operation process of air storage chamber is similar for three operation modes. Meanwhile, the effects of heat exchanger effectiveness, ambient pressure and air storage chamber model on system performance are also investigated. |
| Databáze: | OpenAIRE |
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