Journal
ENERGIES
Volume 8, Issue 7, Pages 7058-7069Publisher
MDPI AG
DOI: 10.3390/en8077058
Keywords
sky condition; hourly solar radiation; sky clearness index; probability of persistence; solar organic Rankine cycle; dynamic simulation
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2013R1A1A2012173]
- Energy Efficiency and Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- National Research Foundation of Korea (NRF) - Korea government (MSIP) through Global Core Research Center for Ships & Offshore Plants (GCRC-SOP) [2011-0030013]
- Ministry of Trade, Industry & Energy, Republic of Korea [20112010100030]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20112010100030] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A mathematical model of hourly solar radiation with weather variability is proposed based on the simple sky model. The model uses a superposition of trigonometric functions with short and long periods. We investigate the effects of the model variables on the clearness (k(D)) and the probability of persistence (POPD) indices and also evaluate the proposed model for all of the k(D)-POPD weather classes. A simple solar organic Rankine cycle (SORC) system with thermal storage is simulated using the actual weather conditions, and then, the results are compared with the simulation results using the proposed model and the simple sky model. The simulation results show that the proposed model provides more accurate system operation characteristics than the simple sky model.
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