Thermodynamic and Exergy Analyses of a Novel Solar-Powered CO2 Transcritical Power Cycle with Recovery of Cryogenic LNG Using Stirling Engines | ||
| Renewable Energy Research and Applications | ||
| مقاله 5، دوره 1، شماره 2، مهر 2020، صفحه 175-185 اصل مقاله (556.37 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22044/rera.2020.9282.1023 | ||
| نویسندگان | ||
| A. Naseri1؛ M. Fazlikhani1؛ M. Sadeghzadeh* 2؛ A. Naeimi1؛ M. Bidi3؛ Seyyed H. Tabatabaei2 | ||
| 1Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, A.C., Tehran, Iran. | ||
| 2Department of Renewable Energy and Environmental Engineering, University of Tehran, Tehran, Iran. | ||
| 3Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, Tehran, Iran. | ||
| چکیده | ||
| In this paper, a novel CO2 transcritical power cycle which is driven by solar energy integrated by a cryogenic LNG recovery unit is investigated. In the proposed cycle, the condenser unit of the CO2 power cycle is replaced by a Stirling engine. Thermodynamic and exergy analyses are carried out to evaluate the performance of the presented system. Furthermore, in order to investigate the impact of utilization of Stirling engines instead of conventional condenser units, the proposed cycle is compared with the typical CO2 power cycle. The results show that employing the Stirling engine decrease the exergy destruction from 17% in the typical cycle to 8.85%. In addition, the total generated power of the novel system is considerably boosted up about 15 kW in off-peak times and more than 20 kW in the peak time. Moreover, integration of the Stirling engine also decreases LNG mass flow rate. Therefore, the required heat exchanger area in the LNG heater is also lowered. | ||
| کلیدواژهها | ||
| Solar collector؛ transcritical CO2 power cycle؛ LNG؛ Stirling engine؛ Exergy | ||
| مراجع | ||
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