A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

Taehong Sung, Sang Youl Yoon and Kyung Chun Kim
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Taehong Sung: School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea
Sang Youl Yoon: Rolls-Royce and Pusan National University Technology Centre, Pusan National University, Busan 609-735, Korea
Kyung Chun Kim: School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea

Energies, 2015, vol. 8, issue 7, 1-12

Abstract: 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 ( POP D ) indices and also evaluate the proposed model for all of the k D -POP D 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.

Keywords: sky condition; hourly solar radiation; sky clearness index; probability of persistence; solar organic Rankine cycle; dynamic simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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