Abstract
In case of fixed electricity tariffs, fixed-orientation solar collectors in grid-connected systems are typically positioned to the south, tilted approximately at location latitude. Such orientation maximizes annual energy and hence the total income. On the other hand, in case of time-varying feed-in tariffs the maximum annual energy yield does not necessarily correlate with the maximum income. Therefore, in order to shorten the rate of return, both the tilt and azimuth of solar collectors should be varied accordingly. The paper demonstrates a case study for Negev region of Southern Israel, based on clear sky irradiation model and current feed-in tariffs. In order to estimate a typical annual energy yield, 1-hour-resolution irradiation data are used in order to obtain the power output of a typical solar panel with similar resolution. A typical losses model is employed to improve the prediction accuracy. Correspondent temperature and wind speed data are also utilized to account for temperature-induced de-rating. The results may also be used to indicate the feasibility of the feed-in tariffs to avoid economical imbalance. It is shown that unlike in previously described cases, a similar rate of return for both maximum energy and maximum income orientation are obtained in Israel, demonstrating excellent choice of feed-in tariffs for solar energy in Israel.
Original language | American English |
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Pages (from-to) | 1379-1382 |
Number of pages | 4 |
Journal | Engineering for Rural Development |
Volume | 18 |
DOIs | |
State | Published - 1 Jan 2019 |
Event | 18th International Scientific Conference Engineering for Rural Development, ERD 2019 - Jelgava, Latvia Duration: 22 May 2019 → 24 May 2019 |
Keywords
- Feed-in tariff
- Optimal orientation
- Solar energy
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- Energy (miscellaneous)
- Food Science
- Agricultural and Biological Sciences (miscellaneous)
- Industrial and Manufacturing Engineering
- Automotive Engineering