Estimation of the Optimum Energy Received by Solar Energy Flat-Plate Convertors in Greece Using Typical Meteorological Years. Part I: South-Oriented Tilt Angles

Kambezidis, H. D.; Psiloglou, Basil Ε.

doi:10.3390/app11041547

Cited by 20 publications

(19 citation statements)

References 65 publications

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“…Other methods use a combination of groundbased solar data and modelling e.g., [2] or utilise solar data from international data bases e.g., [23,24]. Recently, a new method was presented by Kambezidis and Psiloglou [25] for Greece that estimates the optimum tilt angle of an inclined flat-plate collector with southern orientation for maximum solar energy gain. This method is followed in the present study.…”

Section: Introductionmentioning

confidence: 99%

Solar Potential in Saudi Arabia for Southward-Inclined Flat-Plate Surfaces

et al. 2021

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The major objective of the present work is to investigate into the appropriate tilt angles of south-oriented solar panels in Saudi Arabia for maximum performance. This is done with the estimation of the annual energy sums received on surfaces with tilt angles in the range 15°–55° inclined to south at 82 locations covering all Saudi Arabia. The analysis shows that tilt angles of 20°, 25° and 30° towards south are the optimum ones depending on site. These optimum tilt angles define three distinct solar energy zones in Saudi Arabia. The variation of the energy sums in each energy zone on annual, seasonal and monthly basis is given; the analysis provides regression equations for the energy sums as function of time in each case. Furthermore, the spatial distribution of the annual global inclined solar energy in Saudi Arabia is shown in a solar map specially derived. The annual energy sums are found to vary between 1612 kWhm−2year−1 and 2977 kWhm−2year−1 across the country. Finally, the notion of a correction factor is introduced, defined, and employed. This factor can be used to correct energy values estimated by a reference ground albedo to those based on near-real ground albedo.

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Section: Introductionmentioning

confidence: 99%

Solar Potential in Saudi Arabia for Southward-Inclined Flat-Plate Surfaces

et al. 2021

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“…The calculation of the optimum tilt angle and orientation for receiving maximum solar energy on solar flat-plate collectors has been the objective of various studies that use different strategies for obtaining solar radiation data: solar radiation modelling, e.g., [4,5]; combining with ground-based solar data, e.g., [6]; or utilising international data bases, e.g., [7,8]. Recently, a new method was presented by [9] for Greece and was applied in a recent study for Saudi Arabia [1]. The proposed method finds the maximum solar energy received by flat-plate collectors with southward (northward) orientation in the northern (southern) hemisphere.…”

Section: Introductionmentioning

confidence: 99%

Solar Potential in Saudi Arabia for Inclined Flat-Plate Surfaces of Constant Tilt Tracking the Sun

et al. 2021

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The objective of the present work is to investigate the optimally performing tilt angles in Saudi Arabia of solar panels that follow the daily motion of the Sun. To that end, the annual energy sums are estimated for surfaces with tilt angles in the range 5°–55° at 82 locations covering all Saudi Arabia. All calculations use a surface albedo of 0.2 and a near-real value, too. It is found that tilt angles of 40°, 45°, and 50°, respectively, are optimal for the three recently defined solar energy zones in Saudi Arabia. The variation of the energy sums in each energy zone on annual, seasonal and monthly basis is given for near-real ground albedos; the analysis provides regression equations for the energy sums as functions of time. A map of the annual global inclined solar energy for Saudi Arabia is derived and presented. The annual energy sums are found to vary between 2159 kWhm−2year−1 and 4078 kWhm−2year−1. Finally, a correction factor, introduced in a recent publication, is used; it is confirmed that the relationship between the correction factor and either the tilt angle or the ground-albedo ratio has a general application and it may constitute a nomogram.

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“…The PV power measurements are subsequently detrended using clear-sky GHI generated by the McClear model [19] for a tilt of 25°and azimuth of 180°due south. These values constitute the optimal orientation on Rhodes and we assume that a large share of the PV systems are installed with this orientation [20]. However, we notice that the tails of the PV power measurements at sunrise and sunset do not coincide with the clear-sky GHI, which is likely caused by a number of systems orientated towards the east and west, respectively.…”

Section: Datamentioning

confidence: 99%

Seamless intra-day and day-ahead multivariate probabilistic forecasts at high temporal resolution

Meer

Camal

Kariniotakis

2022

2022 17th International Conference on Probabilistic Methods Applied to Power Systems (PMAPS)

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High temporal resolution intra-day and day-ahead photovoltaic (PV) power forecasts are important to maximize the value of PV systems because they enable stakeholders to participate in both the energy and ancillary services markets. Whereas most day-ahead electricity markets feature an hourly temporal resolution, intra-day markets may require forecasts at 5-minute resolution. In addition, battery integration can improve power system management in isolated grids with high PV power penetration, but battery control requires high temporal resolution forecasts. We propose an efficient method based on pattern matching to generate multivariate probabilistic forecasts, approximated by trajectories, at high temporal resolution and without the need to separately forecast the marginals and estimate the covariance matrix. We compare the proposed method against quantile regression forests in combination with copula theory and show that our method reduces the forecast time by approximately 98% and simplifies the modeling chain while incurring a minor performance penalty.

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Estimation of the Optimum Energy Received by Solar Energy Flat-Plate Convertors in Greece Using Typical Meteorological Years. Part I: South-Oriented Tilt Angles

Cited by 20 publications

References 65 publications

Solar Potential in Saudi Arabia for Southward-Inclined Flat-Plate Surfaces

Solar Potential in Saudi Arabia for Southward-Inclined Flat-Plate Surfaces

Solar Potential in Saudi Arabia for Inclined Flat-Plate Surfaces of Constant Tilt Tracking the Sun

Seamless intra-day and day-ahead multivariate probabilistic forecasts at high temporal resolution

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