Effect of Phase Change Material Storage on the Dynamic Performance of a Direct Vapor Generation Solar Organic Rankine Cycle System

Solar energy is a potential source for a thermal power generation system. A direct vapor generation solar organic Rankine cycle system using phase change material storage was analyzed in the present study. The overall system consisted of an arrangement of evacuated flat plate collectors, a phase-cha...

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Bibliographic Details
Published in:Energies (Basel) 2020-11, Vol.13 (22), p.5904
Main Authors: Alvi, Jahan Zeb, Feng, Yongqiang, Wang, Qian, Imran, Muhammad, Khan, Lehar Asip, Pei, Gang
Format: Article
Language:English
Subjects:
Efficiency
Evacuation systems
Finite difference method
Flat plates
Heat exchangers
Heat transfer
High temperature
Meteorological data
Phase change materials
Programming environments
Rankine cycle
Simulation
Solar energy
Storage tanks
Temperature
Thermal energy
Thermal power
Thermal storage
Thermodynamic models
Turbines
Vapors
Working fluids
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Summary:Solar energy is a potential source for a thermal power generation system. A direct vapor generation solar organic Rankine cycle system using phase change material storage was analyzed in the present study. The overall system consisted of an arrangement of evacuated flat plate collectors, a phase-change-material-based thermal storage tank, a turbine, a water-cooled condenser, and an organic fluid pump. The MATLAB programming environment was used to develop the thermodynamic model of the whole system. The thermal storage tank was modeled using the finite difference method and the results were validated against experimental work carried out in the past. The hourly weather data of Karachi, Pakistan, was used to carry out the dynamic simulation of the system on a weekly, monthly, and annual basis. The impact of phase change material storage on the enhancement of the overall system performance during the charging and discharging modes was also evaluated. The annual organic Rankine cycle efficiency, system efficiency, and net power output were observed to be 12.16%, 9.38%, and 26.8 kW, respectively. The spring and autumn seasons showed better performance of the phase change material storage system compared to the summer and winter seasons. The rise in working fluid temperature, the fall in phase change material temperature, and the amount of heat stored by the thermal storage were found to be at a maximum in September, while their values became a minimum in February.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13225904