Wind energy plants repowering potential in Italy: technical-economic assessment

Serri, L.; Lembo, E.; Airoldi, Davide; Gelli, Camilla; Beccarello, Massimo

doi:10.1016/j.renene.2017.08.031

Cited by 65 publications

(35 citation statements)

References 2 publications

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“…In some cases, parts of existing infrastructure might be usable, eg, the wind farm substation and some of the electrical connections. Repowering will have a positive effect in reaching climate change commitments at a national level, as modelled by Jung et al in the German case, Serri et al in the Italian case, and by Ramírez et al in the Spanish case …”

Section: Background—repowering Wind Turbinesmentioning

confidence: 99%

“…12 Compared with a greenfield project, financing conditions tend to be better for repowering projects because the wind resource is known already and planning costs will be lower. 6,13,14 In some cases, parts of existing infrastructure might be usable, 15 11,16,17 A theoretical case study for a wind farm in India has shown that energy yield could increase by a factor of four. 18 Other studies have reported an increase in capacity factor by 10 percentage points.…”

Section: Background-repowering Wind Turbinesmentioning

confidence: 99%

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Technology effects in repowering wind turbines

2019

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This research investigates, analyses, and quantifies the technological effects of wind turbine repowering (ie, where old turbines are removed and new turbines are installed at the same or a very close location, including the enhanced performance in energy production). In these cases, it is assumed that both old and new turbines are subject to the same wind regime, other than because of technological elements, such as hub height, and thus it is possible to isolate the effects of new technology from the effect of changing local wind conditions. This research is based on the analysis of empirical data on repowering turbines in Denmark and Germany, and on historical production data available for the Danish component of the data set. Technological innovations are expected to enable new wind turbines to capture more energy at the repowering site, mostly through larger rotors and higher hub heights, and this is what this study has analysed. The results show that new turbines in repowering projects are twice as high, have three times the rotor diameter, nine times the swept area, six times the nominal power, and nine times as much electricity as the old turbines. However, the most significant improvement is probably the increase of capacity factor of 7.1% on a per-turbine basis, or 9.7% on a per-production basis.

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Section: Background—repowering Wind Turbinesmentioning

confidence: 99%

Section: Background-repowering Wind Turbinesmentioning

confidence: 99%

Technology effects in repowering wind turbines

2019

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“…Please note that the Italian government also established incentive policies for other RES. For example, an analysis of supports and trend developments of the Italian biogas sector is described in [52], while an overview of the Italian wind sector is given, e.g., on [53]. Support tariffs were established in the so-called first (I), second (II), third (III), fourth (IV), and fifth (V) "Conto Energia" (in English, "Energy Bill").…”

Section: Italian Pv Sector: Feed-in Tariffs and Trends Of Growthmentioning

confidence: 99%

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Benato

Stoppato

2019

Energies

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Renewable energy sources are the most useful way to generate clean energy and guide the transition toward green power generation and a low-carbon economy. Among renewables, the best alternative to electricity generation from fossil fuels is solar energy because it is the most abundant and does not release pollutants during conversion processes. Despite the photovoltaic (PV) module ability to produce electricity in an eco-friendly way, PV cells are extremely sensitive to temperature increments. This can result in efficiency drop of 0.25%/ ∘ C to 0.5%/ ∘ C. To overcome this issue, manufacturers and researchers are devoted to the improvement of PV cell efficiency by decreasing operating temperature. For this purpose, the authors have developed a low-cost and high-performance PV cooling system that can drastically reduce module operating temperature. In the present work, the authors present a set of experimental measurements devoted to selecting the PV cooling arrangement that guarantees the best compromise of water-film uniformity, module temperature reduction, water-consumption minimization, and module power production maximization. Results show that a cooling system equipped with 3 nozzles characterized by a spraying angle of 90 ∘ , working with an inlet pressure of 1.5 bar, and which remains active for 30 s and is switched off for 120 s, can reduce module temperature by 28 ∘ C and improve the module efficiency by about 14%. In addition, cost per single module of the cooling system is only 15 €.

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“…Repowering optimization, which is often called expansion planning, has been applied in various existing energy system. In Serri et al, 20 from the perspective of technical-economic assessment, the evaluation of the repowering potential of wind energy plants in Italy is discussed by means of three steps methodology, and this paper could be a starting point for a more global analysis to the future of wind energy in Italy. A combined socioeconomic model is proposed in Candas et al 18 to investigate German and Italian PV future expansion without consideration of feed-in tariffs.…”

Section: Introductionmentioning

confidence: 99%

“…When taking CO 2 taxes into account, the proper option of repowering the existing thermal power plant is integrating solar energy. In Serri et al, 20 from the perspective of technical-economic assessment, the evaluation of the repowering potential of wind energy plants in Italy is discussed by means of three steps methodology, and this paper could be a starting point for a more global analysis to the future of wind energy in Italy. Hou et al 21 is the first paper to investigate the profitability of the repowering strategy by means of adaptive PSO, and the authors focus on optimization of offshore wind farm repowering using the evaluation index of the levelized cost of energy (LCOE).…”

Section: Introductionmentioning

confidence: 99%

Implementation of repowering optimization for an existing photovoltaic‐pumped hydro storage hybrid system: A case study in Sichuan, China

Cao

et al. 2019

Int J Energy Res

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Summary For a remote area or an isolated island, where the grid has not extended, a standalone hybrid energy system can provide cheap and adequate power for local users. However, with the development of society, the load demand will increase and the original system cannot completely meet the load demand. This situation occurs in Xiaojin, Sichuan, China. The existing photovoltaic‐pumped hydro storage (PV‐PHS) hybrid system in this area as the original system cannot completely meet the load requirements at present. The term “repowering” aims to maximize the reliability of power supply and the utilization of the PV‐PHS hybrid energy system that differs from traditional planning optimization to build all components. The repowering strategy is to integrate wind turbines (WTs) and battery into the original system. For the repowering system, a power management strategy is proposed to determine the operating modes of the PHS and battery. Three objectives, which are minimizing percentage of the demand not supplied, levelized cost of energy, and curtailment rate of renewable energy, are considered in the optimization model. Simulation is conducted by single‐objective, biobjective, and triobjective particle swarm optimization (PSO) techniques. For the single‐objective optimization, the comparison of PSO and genetic algorithm (GA) is made. For the double‐objective optimization, multiobjective PSO (MOPSO) is compared with weighted sum approach (WSA), and fuzzy satisfying method is utilized to find the win‐win solution. The results reveal that the repowering strategy can help to achieve maximum reliability of power supply after load demand increases significantly, and the battery plays an important role in such a hybrid system.

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Wind energy plants repowering potential in Italy: technical-economic assessment

Cited by 65 publications

References 2 publications

Technology effects in repowering wind turbines

Technology effects in repowering wind turbines

An Experimental Investigation of a Novel Low-Cost Photovoltaic Panel Active Cooling System

Implementation of repowering optimization for an existing photovoltaic‐pumped hydro storage hybrid system: A case study in Sichuan, China

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