Gören, Deniz
Installing large scales of solar energy introduces some financial risks for the investors since the solar resource is variable. Thus, a long-term energy yield estimation is needed to see the variability of the solar resource. This study aims to see the relation between long-term trends of global horizontal irradiation (GHI) with the energy yield and the levelized cost of electricity (LCOE). Probability of exceedance (POE) values were found to assess the bankability of installing a solar PV power plant. Different datasets, such as typical meteorological year (TMY), satellite-based and ground-measured data, were used. Quality assessment was done to check the accuracy of ground-measured data using quality control tests. Erroneous GHI data was estimated using the Erbs model. Global tilted irradiation (GTI) was also estimated using the isotropic sky diffuse model, and it was compared with measured GTI. The interannual variability of GHI was found as 5.94% and 2.21% for ground-measured and satellite-based data, respectively. The comparison of TMY and P50 values showed that TMY datasets underpredicted the annual GHI by about 5.15% and the energy yield by about 6.83% on average. When Normal distribution was compared with the empirical method, the P50 value was underpredicted by 0.93% for energy yield, whereas, Normal cumulative distribution function (CDF) overpredicted P90 value than the empirical CDF 3.93%. Doing stochastic simulations resulted in the highest POE values: P50 and P90 values increased by 3.30% and 6.10%, respectively, compared to the empirical method. Moreover, while the range of energy yield increased to about 1500-2000 kWh/kWp, LCOE range increased to 0.05-0.19 $/kWh in stochastic simulations. As the overall uncertainty of energy yield was found as about 7.08%,


A new economic feasibility approach for solar chimney power plant design
Okoye, Chiemeka Onyeka; Solyali, Oguz; Taylan, Onur (2016-10-15)
Solar chimney power plants have been accepted as one of the promising technologies for solar energy utilization. The objective of this study is to propose an effective approach to simultaneously determine the optimal dimensions of the solar chimney power plant and the economic feasibility of the proposed plant. For this purpose, a two-stage economic feasibility approach is proposed based on a new nonlinear programming model. In the first stage, the proposed optimization model which determines the optimal pl...
Economic feasibility of solar PV system for rural electrification in Sub-Sahara Africa
Okoye, Chiemeka Onyeka; Oranekwu-Okoye, Blessing Chioma (2018-02-01)
The future of solar photovoltaic (PV) systems as a viable alternative to conventional fossil fuel-based resources seem promising with the rapid decline in the cost over the last decade. Notwithstanding, PV technology is yet to make a meaningful contribution in Sub-Sahara Africa (SSA) where the need for energy is deemed critical. The reason being that the technology is perceived by policymakers in SSA not to be capable of functioning profitably as an independent economic unit that requires project financing....
TASDEMIROGLU, E; ARINC, F (Elsevier BV, 1988-01-01)
The necessity for technical-economic analysis of solar energy systems is obvious when assessing their feasibility vis-á-vis conventional alternative systems. Optimum magnitudes of the installation parameters should be defined under the required economic conditions. In this study, the optimization procedure was chosen so as to maximize the total accumulated saving throughout the economic lifetime of the system. The annual solar heating fraction of the system is assessed using the f-chart method which can be ...
Extremely-broad band metamaterial absorber for solar energy harvesting based on star shaped resonator
A new metamaterial absorber (MA) is investigated and shown numerically for solar energy harvesting for future solar cell applications. The structure consists of two metals and one dielectric layer having different thicknesses. Owing to this combination, the structure exhibits plasmonic resonance characteristics. In the entire spectrum of visible frequency region, the obtained results show that investigated structure has perfect absorptivity which is above 91.8%. Proposed structure also has 99.87% absorption...
The impact of variable renewable energy technologies on electricity markets: An analysis of the Turkish balancing market
Sirin, Selahattin Murat; Yılmaz, Berna Nisa (2021-04-01)
As global investment in renewable energy technologies continue to trend upward, the effects of variable (intermittent) renewable energy technologies on power markets have created serious challenges for regulators and policymakers. The literature on the effects of these technologies on day-ahead markets has been well established; however, further research is required on intra-day and real-time (balancing) markets to understand how these technologies are changing electricity market dynamics. In this respect, ...
Citation Formats
D. Gören, “LONG-TERM ENERGY YIELD ESTIMATION OF A SOLAR PHOTOVOLTAIC POWER PLANT IN METU NCC,” M.S. - Master of Science, Middle East Technical University, 2021.